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FORM 10-Q


SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

(Mark One)

(X) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2003

OR

( ) TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ________________ to ________________

Commission file number 0-18996


SOUTHWEST OIL & GAS 1990-91 INCOME PROGRAM
Southwest Oil & Gas Income Fund X-A, L.P.
(Exact name of registrant as specified
in its limited partnership agreement)

Delaware 75-2310854
(State or other jurisdiction of (I.R.S. Employer
incorporation or organization) Identification No.)


407 N. Big Spring, Suite 300
Midland, Texas 79701
(Address of principal executive offices)

(432) 686-9927
(Registrant's telephone number,
including area code)

Indicate by check mark whether registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act
of 1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to
such filing requirements for the past 90 days:

Yes No X

Indicate by check mark whether the registrant is an accelerated filer (as
defined in Rule 12b-2 of the Exchange Act).

Yes No X

The total number of pages contained in this report is 24.


Glossary of Oil and Gas Terms
The following are abbreviations and definitions of terms commonly used in
the oil and gas industry that are used in this filing. All volumes of
natural gas referred to herein are stated at the legal pressure base to the
state or area where the reserves exit and at 60 degrees Fahrenheit and in
most instances are rounded to the nearest major multiple.

Bbl. One stock tank barrel, or 42 United States gallons liquid volume.

Developmental well. A well drilled within the proved area of an oil or
natural gas reservoir to the depth of a stratigraphic horizon known to be
productive.

Exploratory well. A well drilled to find and produce oil or gas in an
unproved area to find a new reservoir in a field previously found to be
productive of oil or natural gas in another reservoir or to extend a known
reservoir.

Farm-out arrangement. An agreement whereby the owner of the leasehold
or working interest agrees to assign his interest in certain specific
acreage to the assignee, retaining some interest, such as an overriding
royalty interest, subject to the drilling of one (1) or more wells or other
performance by the assignee.

Field. An area consisting of a single reservoir or multiple reservoirs
all grouped on or related to the same individual geological structural
feature and/or stratigraphic condition.

Mcf. One thousand cubic feet.

Oil. Crude oil, condensate and natural gas liquids.

Overriding royalty interest. Interests that are carved out of a
working interest, and their duration is limited by the term of the lease
under which they are created.


Present value and PV-10 Value. When used with respect to oil and
natural gas reserves, the estimated future net revenue to be generated from
the production of proved reserves, determined in all material respects in
accordance with the rules and regulations of the SEC (generally using
prices and costs in effect as of the date indicated) without giving effect
to non-property related expenses such as general and administrative
expenses, debt service and future income tax expenses or to depreciation,
depletion and amortization, discounted using an annual discount rate of
10%.

Production costs. Costs incurred to operate and maintain wells and
related equipment and facilities, including depreciation and applicable
operating costs of support equipment and facilities and other costs of
operating and maintaining those wells and related equipment and facilities.

Proved Area. The part of a property to which proved reserves have been
specifically attributed.

Proved developed oil and gas reserves. Proved developed oil and gas
reserves are reserves that can be expected to be recovered from existing
wells with existing equipment and operating methods.

Proved properties. Properties with proved reserves.

Proved reserves. The estimated quantities of crude oil, natural gas,
and natural gas liquids that geological and engineering data demonstrate
with reasonable certainty to be recoverable in future years from known
reservoirs under existing economic and operating conditions.

Proved undeveloped reserves. Proved undeveloped oil and gas reserves
are reserves that are expected to be recovered from new wells on undrilled
acreage, or from existing wells where a relatively major expenditure is
required for recompletion.

Reservoir. A porous and permeable underground formation containing a
natural accumulation of producible oil or gas that is confined by
impermeable rock or water barriers and is individual and separate from
other reservoirs.

Royalty interest. An interest in an oil and natural gas property
entitling the owner to a share of oil or natural gas production free of
costs of production.

Working interest. The operating interest that gives the owner the
right to drill, produce and conduct operating activities on the property
and a share of production.

Workover. Operations on a producing well to restore or increase
production.




PART I. - FINANCIAL INFORMATION


Item 1. Financial Statements

The unaudited condensed financial statements included herein have been
prepared by the Registrant (herein also referred to as the "Partnership")
in accordance with generally accepted accounting principles for interim
financial information and with the instructions to Form 10-Q and Rule 10-01
of Regulation S-X. Accordingly, they do not include all of the information
and footnotes required by generally accepted accounting principles for
annual financial statements. In the opinion of management, all adjustments
necessary for a fair presentation have been included and are of a normal
recurring nature. The financial statements should be read in conjunction
with the audited financial statements and the notes thereto for the year
ended December 31, 2002, which are found in the Registrant's Amendment No.
1 to its Annual Report on Form 10-K for 2002 filed with the Securities and
Exchange Commission on November 12, 2003. The December 31, 2002 balance
sheet included herein has been derived from the Registrant's Amendment No.
1 to its Annual Report on Form 10-K for 2002. Operating results for the
three and six month periods ended June 30, 2003 are not necessarily
indicative of the results for the full year.

Introductory Note - Statement of Financial Accounting Standard No. 143
The Partnership implemented SFAS No. 143 effective January 1, 2003 (See
Note 3) to the Partnership's financial statements.

Introductory Note - Depletion Method
During the fourth quarter of 2002, the Partnership changed its method of
providing for depletion from the units-of-revenue method to the units-of-
production method as described in Notes 4 and 5 to the Partnership's
financial statements.

This change in depletion method was applied as a cumulative effect of a
change in accounting principle effective as of January 1, 2002. The
unaudited condensed financial statements of the Partnership for the period
ended June 30, 2002, included herein, have been restated (as described in
Notes 4 and 5 to the Partnership's financial statements) using the new
depletion method and differ from those previously issued in the
Partnership's Quarterly Report on Form 10-Q for the period ended June 30,
2002.



Southwest Oil & Gas Income Fund X-A, L.P.
Balance Sheets

June 30, December
31,
2003 2002
----- -----
(unaudit
ed)
Assets
- --------

Current assets:
Cash and cash equivalents $ 4,126 4,131
Receivable from Managing 9,262 -
General Partner
-------- --------
----- ----
Total current assets 13,388 4,131
-------- --------
----- ----
Oil and gas properties -
using the full-
cost method of accounting 3,888,13 3,829,91
7 7
Less accumulated
depreciation,
depletion and 3,621,88 3,720,38
amortization 6 6
-------- --------
----- ----
Net oil and gas 266,251 109,531
properties
-------- --------
----- ----
$ 279,639 113,662
======= =======
Liabilities and Partners'
Equity
- ----------------------------
- ------------

Current liabilities:
Distributions payable $ 406 410
Payable to Managing General - 19,363
Partner
-------- --------
---- ----
Total current liabilities 406 19,773
-------- --------
---- ----
Other long term liabilities 144,776 -
-------- --------
---- ----

Partners' equity:
General partners (16,482) (21,139)
Limited partners 150,939 115,028
-------- --------
---- ----
Total partners' equity 134,457 93,889
-------- --------
---- ----
$ 279,639 113,662
======= =======


Southwest Oil & Gas Income Fund X-A, L.P.
Statements of Operations
(unaudited)

Three Months Ended Six Months Ended
June 30, June 30,
2003 2002 2003 2002
(Restate (Restate
d) d)
----- ----- ----- -----
Revenues
- -------------
Oil and gas $ 81,777 86,833 190,873 155,810
Interest 18 - 74 -
Miscellaneous settlement - 4,882 - 4,882
-------- -------- -------- --------
- - -- --
81,795 91,715 190,947 160,692
-------- -------- -------- --------
- - -- --
Expenses
- ------------
Production 51,805 52,028 109,678 111,253
General and administrative 28,437 20,745 49,529 41,777
Depreciation, depletion and 3,000 3,000 6,000 5,000
amortization
Accretion of asset retirement 2,784 - 5,568 -
obligation
-------- -------- -------- --------
- - -- --
86,026 75,773 170,775 158,030
-------- -------- -------- --------
- - -- --
Net income (loss) before (4,231) 15,942 20,172 2,662
cumulative effect

Cumulative effect of change in
accounting
principle - SFAS No. 143 - - - 20,396 -
See Note 3
Cumulative effect of change in
accounting principle
- change in depletion method - - - (3,000)
- - See Note 4
-------- -------- -------- --------
- - -- --
Net income (loss) $ (4,231) 15,942 40,568 (338)
===== ===== ====== ======
Net income (loss) allocated
to:
Managing General Partner $ (111) 1,705 4,191 690
===== ===== ====== ======
General Partner $ (12) 189 466 76
===== ===== ====== ======
Limited partners $ (4,108) 14,048 35,911 (1,104)
===== ===== ====== ======
Per limited partner unit $ (.39) 1.34 .18
before cumulative effect 1.68
Cumulative effects per - - 1.75 (.29)
limited partner unit
-------- -------- -------- --------
- - --- --
Per limited partner unit $ (.39) 1.34 (.11)
3.43
===== ===== ====== ======
Pr o forma amounts assuming
changes are applied
retroactively (See Note 3):
Net income before cumulative $ - 13,381 - (2,461)
effect
===== ===== ====== ======
Per limited partner unit $ - 1.12 - (.26)
(10,484.0)
===== ===== ====== ======
Net income $ - 13,381 - (5,461)
===== ===== ====== ======
Per limited partner unit $ - 1.12 - (.55)
(10,484.0)
===== ===== ====== ======

Southwest Oil & Gas Income Fund X-A, L.P.
Statements of Cash Flows
(unaudited)

Six Months Ended
June 30,
2003 2002
(Restate
d)
----- -----
Cash flows from operating
activities:

Cash received from sale of oil $ 182,222 140,019
and gas
Cash paid to suppliers (179,181 (154,686
) )
Interest received 74 -
Miscellaneous settlement - 4,882
-------- --------
-- --
Net cash provided by (used in) 3,115 (9,785)
operating activities
-------- --------
-- --

Cash flows used in investing
activities:

Additions to oil and gas (3,116) (7,471)
properties
-------- --------
-- --
Cash flows used in financing
activities:

Distributions to partners (4) -
-------- --------
-- --
Net decrease in cash and cash (5) (17,256)
equivalents

Beginning of period 4,131 21,313
-------- --------
-- --
End of period $ 4,126 4,057
====== ======
Reconciliation of net income
(loss) to net cash
provided by (used in)operating
activities:

Net income (loss) $ 40,568 (338)

Adjustments to reconcile net
income (loss) to net cash
provided by (used in) operating
activities:

Depreciation, depletion and 6,000 5,000
amortization
Accretion of asset retirement 5,568 -
obligation
Cumulative effect of change in
accounting
principle - SFAS No. 143 (20,396) -
Cumulative effect of change in
accounting
principle - change in depletion - 3,000
method
Increase in receivables (8,651) (15,791)
Decrease in payables (19,974) (1,656)
-------- --------
-- --
Net cash provided by (used in) $ 3,115 (9,785)
operating activities
====== ======
Noncash investing and financing
activities:

Increase in oil and gas
properties - Adoption
of SFAS No. 143 $ 159,604 -
====== ======

Southwest Oil & Gas Income Fund X-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements

1. Organization
Southwest Oil and Gas Income Fund X-A, L.P. was organized under the
laws of the state of Delaware on January 29, 1990, for the purpose of
acquiring producing oil and gas properties and to produce and market
crude oil and natural gas produced from such properties for a term of
50 years, unless terminated at an earlier date as provided for in the
Partnership Agreement. The Partnership sells its oil and gas
production to a variety of purchasers with the prices it receives
being dependent upon the oil and gas economy. Southwest Royalties,
Inc. serves as the Managing General Partner and H. H. Wommack, III, as
the individual general partner. Revenues, costs, and expenses are
allocated as follows:
Limited General
Partners Partners
-------- --------
Interest income on capital 100% -
contributions
Oil and gas sales 90% 10%
All other revenues 90% 10%
Organization and offering 100% -
costs (1)
Syndication costs 100% -
Amortization of organization 100% -
costs
Property acquisition costs 100% -
Gain/loss on property 90% 10%
disposition
Operating and administrative 90% 10%
costs (2)
Depreciation, depletion and
amortization
of oil and as properties 100% -
All other costs 90% 10%

(1) All organization costs in excess of 3% of initial capital
contributions will be paid by the Managing General Partner and
will be treated as a capital contribution. The Partnership paid
the Managing General Partner an amount equal to 3% of initial
capital contributions for such organization costs.

(2) Administrative costs in any year, which exceed 2% of capital
contributions shall be paid by the Managing General Partner and
will be treated as a capital contribution.

2. Summary of Significant Accounting Policies
The interim financial information as of June 30, 2003, and for the
three and six months ended June 30, 2003, is unaudited. Certain
information and footnote disclosures normally included in financial
statements prepared in accordance with generally accepted accounting
principles have been condensed or omitted in this Form 10-Q pursuant
to the rules and regulations of the Securities and Exchange
Commission. However, in the opinion of management, these interim
financial statements include all the necessary adjustments to fairly
present the results of the interim periods and all such adjustments
are of a normal recurring nature. The interim consolidated financial
statements should be read in conjunction with the Partnership's
Amendment No. 1 its Annual Report on Form 10-K for the year ended
December 31, 2002, filed with SEC on November 12, 2003.

3. Cumulative effect of change in accounting principle - SFAS No. 143
On January 1, 2003, the Partnership adopted Statement of Financial
Accounting Standards No. 143, Accounting for Asset Retirement
Obligations ("SFAS No. 143"). Adoption of SFAS No. 143 is required
for all companies with fiscal years beginning after June 15, 2002.
The new standard requires the Partnership to recognize a liability for
the present value of all legal obligations associated with the
retirement of tangible long-lived assets and to capitalize an equal
amount as a cost of the asset and depreciate the additional cost over
the estimated useful life of the asset. On January 1, 2003, the
Partnership recorded additional costs, net of accumulated
depreciation, of approximately $159,604, a long term liability of
approximately $139,208 and a gain of approximately $20,396 for the
cumulative effect on depreciation of the additional costs and
accretion expense on the liability related to expected abandonment
costs of its oil and natural gas producing properties. At June 30,
2003, the asset retirement obligation was $144,776, and the increase
in the balance from January 1, 2003 of $5,568 is due to accretion
expense. The pro forma amounts for the three and six months ended
June 30, 2002, which are presented on the face of the statements of
operations, reflect the effect of retroactive application of SFAS No.
143.

Southwest Oil & Gas Income Fund X-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements

4. Cumulative effect of change in accounting principle - change in
depletion method
In the fourth quarter of 2002, the Partnership changed methods of
accounting for depletion of capitalized costs from the units-of-
revenue method to the units-of-production method. The newly adopted
accounting principle is preferable in the circumstances because the
units-of-production method results in a better matching of the costs
of oil and gas production against the related revenue received in
periods of volatile prices for production as have been experienced in
recent periods. Additionally, the units-of-production method is the
predominant method used by full cost companies in the oil and gas
industry, accordingly, the change improves the comparability of the
Partnership's financial statements with its peer group. The
Partnership adopted the units-of-production method through the
recording of a cumulative effect of a change in accounting principle
in the amount of $3,000 effective as of January 1, 2002. The
Partnership's depletion for the three and six months ended June 30,
2003 and 2002 has been calculated using the units-of-production
method. There was no effect to income before cumulative effect of a
change in accounting principle for the three and six months ended June
30, 2002. The effect of the change on the six months ended June 30,
2002 was to decrease net income by $3,000 ($.29 per limited partner
unit).

5. June 30, 2002 Restatement
During the fourth quarter of 2002, the Partnership changed its method
of providing for depletion from the units-of-revenue method to the
units-of-production method as described in Note 4.

This change in the method used to implement the Partnership's change
in the manner in which it determines depletion resulted in a decrease
in the Partnership's previously reported net oil and gas properties of
$3,000 from $112,531 to $109,531 as of December 31, 2002 and did not
effect the Partnership's 2002 cash flows from operations, investing or
financing activities.

The change had the following effects on the Statement of Operations
for the three and six months ended June 30, 2002.

Three Months Ended Six Months Ended
(1)
Previous Previously
ly
Reported Restated Reported
Depreciation,
depletion and
amortization $3,000 5,000 5,000
Income before 15,942 2,662 2,662
cumulative effect
Cumulative effect of
change in
accounting principle - (3,000) -
Net income (loss) 15,942 (338) 2,662
Net income (loss)
allocated to:
Managing General 1,705 690 690
Partner
General partner 189 76 76
Limited partners 14,048 (1,104) 1,896
Income per limited
partner
unit before .18 .18
cumulative effect 1.34
Cumulative effect
per limited
partner unit - (.29) -
Net income (loss)
per limited
partner unit (.11) .18
1.34

(1) There was no effect to income before cumulative effect of a change in
accounting principle for the three months ended June 30, 2002.



Item 2. Management's Discussion and Analysis of Financial Condition and
Results of Operations

General

Southwest Oil & Gas Income Fund X-A, L.P. was organized as a Delaware
limited partnership on January 29, 1990. The offering of such limited
partnership interests began on May 11, 1990 as part of a shelf offering
registered under the name Southwest Oil & Gas 1990-91 Income Program.
Minimum capital requirements for the Partnership were met on August 15,
1990, with the offering of limited partnership interests concluding on
November 30, 1990, with total limited partner contributions of $5,242,000.

The Partnership was formed to acquire interests in producing oil and gas
properties, to produce and market crude oil and natural gas produced from
such properties, and to distribute the net proceeds from operations to the
limited and general partners. Net revenues from producing oil and gas
properties will not be reinvested in other revenue producing assets except
to the extent that production facilities and wells are improved or reworked
or where methods are employed to improve or enable more efficient recovery
of oil and gas reserves.

Increases or decreases in Partnership revenues and, therefore,
distributions to partners will depend primarily on changes in the prices
received for production, changes in volumes of production sold, lease
operating expenses, enhanced recovery projects, offset drilling activities
pursuant to farm-out arrangements, sales of properties, and the depletion
of wells. Since wells deplete over time, production can generally be
expected to decline from year to year.

Well operating costs and general and administrative costs usually decrease
with production declines; however, these costs may not decrease
proportionately. Net income available for distribution to the partners is
therefore expected to fluctuate in later years based on these factors.

Based on current conditions, management anticipates performing drilling
projects and workovers during the years 2003 and 2004 to enhance
production. The Partnership may have an increase in production volumes for
the years 2003 and 2004, otherwise, the Partnership will most likely
experience the historical production decline, which has approximated 9% per
year.

Oil and Gas Properties

Oil and gas properties are accounted for at cost under the full-cost
method. Under this method, all productive and nonproductive costs incurred
in connection with the acquisition, exploration and development of oil and
gas reserves are capitalized. Gain or loss on the sale of oil and gas
properties is not recognized unless significant oil and gas reserves are
involved.

In the fourth quarter of 2002, the Partnership changed methods of
accounting for depletion of capitalized costs from the units-of-revenue
method to the units-of-production method. The newly adopted accounting
principle is preferable in the circumstances because the units-of-
production method results in a better matching of the costs of oil and gas
production against the related revenue received in periods of volatile
prices for production as have been experienced in recent periods.
Additionally, the units-of-production method is the predominant method used
by full cost companies in the oil and gas industry, accordingly, the change
improves the comparability of the Partnership's financial statements with
its peer group.

Should the net capitalized costs exceed the estimated present value of oil
and gas reserves, discounted at 10%, such excess costs would be charged to
current expense. As of June 30, 2003, the net capitalized costs did not
exceed the estimated present value of oil and gas reserves.



Critical Accounting Policies

Full cost ceiling calculations The Partnership follows the full cost method
of accounting for its oil and gas properties. The full cost method
subjects companies to quarterly calculations of a "ceiling", or limitation
on the amount of properties that can be capitalized on the balance sheet.
If the Partnership's capitalized costs are in excess of the calculated
ceiling, the excess must be written off as an expense.

The Partnership's discounted present value of its proved oil and natural
gas reserves is a major component of the ceiling calculation, and
represents the component that requires the most subjective judgments.
Estimates of reserves are forecasts based on engineering data, projected
future rates of production and the timing of future expenditures. The
process of estimating oil and natural gas reserves requires substantial
judgment, resulting in imprecise determinations, particularly for new
discoveries. Different reserve engineers may make different estimates of
reserve quantities based on the same data. The Partnership's reserve
estimates are prepared by outside consultants.

The passage of time provides more qualitative information regarding
estimates of reserves, and revisions are made to prior estimates to reflect
updated information. However, there can be no assurance that more
significant revisions will not be necessary in the future. If future
significant revisions are necessary that reduce previously estimated
reserve quantities, it could result in a full cost property writedown. In
addition to the impact of these estimates of proved reserves on calculation
of the ceiling, estimates of proved reserves are also a significant
component of the calculation of DD&A.

While estimating the quantities of proved reserves require substantial
judgment, the associated prices of oil and natural gas reserves that are
included in the discounted present value of the reserves do not require
judgment. The ceiling calculation dictates that prices and costs in effect
as of the last day of the period are generally held constant indefinitely.
Because the ceiling calculation dictates that prices in effect as of the
last day of the applicable quarter are held constant indefinitely, the
resulting value may not be indicative of the true fair value of the
reserves. Oil and natural gas prices have historically been cyclical and,
on any particular day at the end of a quarter, can be either substantially
higher or lower than the Partnership's long-term price forecast that is a
barometer for true fair value.

In the fourth quarter of 2002, the Partnership changed methods of
accounting for depletion of capitalized costs from the units-of-revenue
method to the units-of-production method. The newly adopted accounting
principle is preferable in the circumstances because the units-of-
production method results in a better matching of the costs of oil and gas
production against the related revenue received in periods of volatile
prices for production as have been experienced in recent periods.
Additionally, the units-of-production method is the predominant method used
by full cost companies in the oil and gas industry, accordingly, the change
improves the comparability of the Partnership's financial statements with
its peer group.



Results of Operations

A. General Comparison of the Quarters Ended June 30, 2003 and 2002

The following table provides certain information regarding performance
factors for the quarters ended June 30, 2003 and 2002:

Three Months
Ended Percenta
ge
June 30, Increase
2003 2002 (Decreas
e)
---- ---- --------
--
Average price per $ 25.19 8%
barrel of oil 23.41
Average price per mcf $ 4.93 58%
of gas 3.13
Oil production in 2,600 3,200 (19%)
barrels
Gas production in mcf 3,300 3,800 (13%)
Gross oil and gas $ 81,777 86,833 (6%)
revenue
Net oil and gas revenue $ 29,972 34,805 (14%)
Partnership $ - - -
distributions
Limited partner $ - - -
distributions
Per unit distribution
to limited
partners $ - - -
Number of limited 10,484 10,484
partner units

Revenues

The Partnership's oil and gas revenues decreased to $81,777 from $86,833
for the quarters ended June 30, 2003 and 2002, respectively, a decrease of
6%. The principal factors affecting the comparison of the quarters ended
June 30, 2003 and 2002 are as follows:

1. The average price for a barrel of oil received by the Partnership
increased during the quarter ended June 30, 2003 as compared to the
quarter ended June 30, 2002 by 8%, or $1.78 per barrel, resulting in an
increase of approximately $4,600 in revenues. Oil sales represented
80% of total oil and gas sales during the quarter ended June 30, 2003
and 86% during the quarter ended June 30, 2002.

The average price for an mcf of gas received by the Partnership
increased during the same period by 58%, or $1.80 per mcf, resulting in
an increase of approximately $5,900 in revenues.

The total increase in revenues due to the change in prices received
from oil and gas production is approximately $10,500. The market price
for oil and gas has been extremely volatile over the past decade, and
management expects a certain amount of volatility to continue in the
foreseeable future.


2. Oil production decreased approximately 600 barrels or 19% during the
quarter ended June 30, 2003 as compared to the quarter ended June 30,
2002, resulting in a decrease of approximately $14,000 in revenues.

Gas production decreased approximately 500 mcf or 13% during the same
period, resulting in a decrease of approximately $1,600 in revenues.

The total decrease in revenues due to the change in production is
approximately $15,600. The decrease in oil production is primarily due
to a well that had a hole in the casing during the end of 2002, which
was repaired and production has not come back up to normal.

Costs and Expenses

Total costs and expenses increased to $86,026 from $75,773 for the quarters
ended June 30, 2003 and 2002, respectively, an increase of 14%. The
increase is a direct result of the accretion expense associated with our
long-term liability related to expected abandonment costs of our oil and
natural gas properties, general and administrative expense, partially
offset by a decrease in lease operating costs.

1. Lease operating costs and production taxes were less than 1% lower, or
approximately $200 less during the quarter ended June 30, 2003 as
compared to the quarter ended June 30, 2002.

2. General and administrative costs consist of independent accounting and
engineering fees, computer services, postage, and Managing General
Partner personnel costs. General and administrative costs increased
37% or approximately $7,700 during the quarter ended June 30, 2003 as
compared to the quarter ended June 30, 2002. The increase in general
and administrative expenses is due to an increase in independent
accounting review and audit fees.

3. Depletion expense remained unchanged for the quarter ended June 30,
2003 compared to the same period in 2002. In the fourth quarter of
2002, the Partnership changed methods of accounting for depletion of
capitalized costs from the units-of-revenue method to the units-of-
production method. The newly adopted accounting principle is
preferable in the circumstances because the units-of-production method
results in a better matching of the costs of oil and gas production
against the related revenue received in periods of volatile prices for
production as have been experienced in recent periods. Additionally,
the units-of-production method is the predominant method used by full
cost companies in the oil and gas industry, accordingly, the change
improves the comparability of the Partnership's financial statements
with its peer group. There was no effect due to the change in
depletion method for the quarter ended June 30, 2002.


B. General Comparison of the Six Month Periods Ended June 30, 2003 and
2002

The following table provides certain information regarding performance
factors for the six month periods ended June 30, 2003 and 2002:

Six Months
Ended Percenta
ge
June 30, Increase
2003 2002 (Decreas
e)
---- ---- --------
--
Average price per $ 28.63 37%
barrel of oil 20.96
Average price per mcf $ 5.58 105%
of gas 2.72
Oil production in 5,400 6,500 (17%)
barrels
Gas production in mcf 6,500 7,200 (10%)
Gross oil and gas $ 190,873 155,810 23%
revenue
Net oil and gas revenue $ 81,195 44,557 82%
Partnership $ - - -
distributions
Limited partner $ - - -
distributions
Per unit distribution
to limited
partners $ - - -
Number of limited 10,484 10,484
partner units

Revenues

The Partnership's oil and gas revenues increased to $190,873 from $155,810
for the six months ended June 30, 2003 and 2002, respectively, an increase
of 23%. The principal factors affecting the comparison of the six months
ended June 30, 2003 and 2002 are as follows:

1. The average price for a barrel of oil received by the Partnership
increased during the six months ended June 30, 2003 as compared to the
six months ended June 30, 2002 by 37%, or $7.67 per barrel, resulting
in an increase of approximately $41,400 in revenues. Oil sales
represented 81% of total oil and gas sales during the six months ended
June 30, 2003 as compared to 87% during the six months ended June 30,
2002.

The average price for an mcf of gas received by the Partnership
increased during the same period by 105%, or $2.86 per mcf, resulting
in an increase of approximately $18,600 in income from revenues.

The total increase in revenues due to the change in prices received
from oil and gas production is approximately $60,000. The market price
for oil and gas has been extremely volatile over the past decade, and
management expects a certain amount of volatility to continue in the
foreseeable future.


2. Oil production decreased approximately 1,100 barrels or 17% during the
six months ended June 30, 2003 as compared to the six months ended June
30, 2002, resulting in a decrease of approximately $23,100 in revenues.

Gas production decreased approximately 700 mcf or 10% during the same
period, resulting in a decrease of approximately $1,900 in revenues.

The total decrease in revenues due to the change in production is
approximately $25,000. The decrease in oil production is primarily due
to a well that had a hole in the casing during the end of 2002, which
was repaired and production has not come back up to normal.

Costs and Expenses

Total costs and expenses increased to $170,775 from $158,030 for the six
months ended June 30, 2003 and 2002, respectively, an increase of 8%. The
increase is a direct result of the accretion expense associated with our
long term liability related to expected abandonment costs of our oil and
natural gas properties, general and administrative expense and depletion
expense, partially offset by a decrease in lease operating costs.

1. Lease operating costs and production taxes were 1% lower, or
approximately $1,600 less during the six months ended June 30, 2003 as
compared to the six months ended June 30, 2002.

2. General and administrative costs consist of independent accounting and
engineering fees, computer services, postage, and Managing General
Partner personnel costs. General and administrative costs increased
19% or approximately $7,800 during the six months ended June 30, 2003
as compared to the six months ended June 30, 2002. The increase in
general and administrative expenses is due to an increase in
independent accounting review and audit fees.

3. Depletion expense increased to $6,000 for the six months ended June 30,
2003 from $5,000 for the same period in 2002. This represents an
increase of 20%. In the fourth quarter of 2002, the Partnership
changed methods of accounting for depletion of capitalized costs from
the units-of-revenue method to the units-of-production method. The
newly adopted accounting principle is preferable in the circumstances
because the units-of-production method results in a better matching of
the costs of oil and gas production against the related revenue
received in periods of volatile prices for production as have been
experienced in recent periods. Additionally, the units-of-production
method is the predominant method used by full cost companies in the oil
and gas industry, accordingly, the change improves the comparability of
the Partnership's financial statements with its peer group. The effect
of this change in method was to decrease net income for the six months
ended June 30, 2002 by $3,000. The contributing factor to the increase
in depletion expense is in relation to the BOE depletion rate for the
six months ended June 30, 2003, which was $.93 applied to 6,483 BOE as
compared to $.65 applied to 7,700 BOE for the same period.

Cumulative effect of change in accounting principle

On January 1, 2003, the Partnership adopted Statement of Financial
Accounting Standards No. 143, Accounting for Asset Retirement Obligations
("SFAS No. 143"). Adoption of SFAS No. 143 is required for all companies
with fiscal years beginning after June 15, 2002. The new standard requires
the Partnership to recognize a liability for the present value of all legal
obligations associated with the retirement of tangible long-lived assets
and to capitalize an equal amount as a cost of the asset and depreciate the
additional cost over the estimated useful life of the asset. On January 1,
2003, the Partnership recorded additional costs, net of accumulated
depreciation, of approximately $159,604, a long term liability of
approximately $139,208 and a gain of approximately $20,396 for the
cumulative effect on depreciation of the additional costs and accretion
expense on the liability related to expected abandonment costs of its oil
and natural gas producing properties. At June 30, 2003, the asset
retirement obligation was $144,776, and the increase in the balance from
January 1, 2003 of $5,568 is due to accretion expense. The pro forma
amounts for the three and six months ended June 30, 2002, which are
presented on the face of the statements of operations, reflect the effect
of retroactive application of SFAS No. 143.





Liquidity and Capital Resources

The primary source of cash is from operations, the receipt of income from
interests in oil and gas properties. The Partnership knows of no material
change, nor does it anticipate any such change.

Cash flows provided by (used in) operating activities were approximately
$3,100 in the six months ended June 30, 2003 as compared to approximately
$(9,800) in the six months ended June 30, 2002. The primary source of the
2003 cash flow from operating activities was operations.

Cash flows used in investing activities were approximately $3,100 in the
six months ended June 30, 2003 as compared to approximately $7,500 in the
six months ended June 30, 2002. The principle use of the 2003 cash flow
from investing activities was the addition to oil and gas properties.

Cash flows used in financing activities were approximately $5 in the six
months ended June 30, 2003. There were no cash flows used in financing
activities in the six months ended June 2002.

There were no distributions during the six months ended June 30, 2003 and
2002.

Since inception of the Partnership, cumulative monthly cash distributions
of $2,827,732 have been made to the partners. As of June 30, 2003,
$2,602,574 or $248.24 per limited partner unit has been distributed to the
limited partners, representing a 50% return of the capital contributed.

As of June 30, 2003, the Partnership had approximately $13,000 in working
capital. Although the partnership held many long-lived properties at
inception, because of the restrictions on property development imposed by
the partnership agreement, the Partnership cannot develop its non-producing
properties, if any. Without continued development, the producing reserves
continue to deplete. Accordingly, as the Partnership's properties have
matured and depleted, the net cash flows from operations for the
partnership has steadily declined, except in periods of substantially
increased commodity pricing. Maintenance of properties and administrative
expenses for the Partnership are increasing relative to production. As the
properties continue to deplete, maintenance of properties and
administrative costs as a percentage of production are expected to continue
to increase.

The Managing General Partner has examined various alternatives to address
the issue of depleting producing reserves. Continuing operations exposes
the partnership to an inevitable decline in operating results and
distributions of cash. Liquidating the partnership would result in
immediate realization of cash for limited partners, but prices paid by
purchasers of Partnership property in liquidation would likely include a
substantial discount for risks and uncertainties of future cash flows, as
well as any development risks. After reviewing various alternatives, the
Managing General Partner initiated a plan to merge the Partnership and 20
other limited partnerships with and into the Managing General Partner. On
October 17, 2002, the Managing General Partner filed a Registration
Statement on Form S-4 with the Securities and Exchange Commission relating
to this proposed merger. There is no assurance, however, that this merger
will be consummated.


Liquidity - Managing General Partner
The Managing General Partner has a highly leveraged capital structure with
approximately $124.0 million of principal due between December 31, 2002 and
December 31, 2004. The Managing General Partner is constantly monitoring
its cash position and its ability to meet its financial obligations as they
become due, and in this effort, is continually exploring various strategies
for addressing its current and future liquidity needs. The Managing
General Partner regularly pursues and evaluates recapitalization strategies
and acquisition opportunities (including opportunities to engage in
mergers, consolidations or other business combinations) and at any given
time may be in various stages of evaluating such opportunities.

Based on current production, commodity prices and cash flow from
operations, the Managing General Partner has adequate cash flow to fund
debt service, developmental projects and day to day operations, but it is
not sufficient to build a cash balance which would allow the Managing
General Partner to meet its debt principal maturities scheduled for 2004.
Therefore the Managing General Partner is currently seeking to renegotiate
the terms of its obligations, including extending maturity dates, or to
engage new lenders or equity investors in order to satisfy its financial
obligations maturing in 2004.

There can be no assurance that the Managing General Partner's debt
restructuring efforts will be successful. In the event these efforts are
unsuccessful, the Managing General Partner would need to look to other
alternatives to meet its debt obligations, including potentially selling
its assets. There can be no assurance, however, that the sales of assets
can be successfully accomplished on terms acceptable to the Managing
General Partner.

The liquidity of the Managing General Partner, however, does not have a
material impact on the operations of the Partnership. The partnership
agreement of the Partnership allows the limited partners to elect a
successor managing general partner to continue Partnership operations.

Recent Accounting Pronouncements

The FASB has issued Statement No. 143 "Accounting for Asset Retirement
Obligations" which establishes requirements for the accounting of removal-
type costs associated with asset retirements. The standard is effective
for fiscal years beginning after June 15, 2002, with earlier application
encouraged. This statement has been adopted by the Partnership effective
January 1, 2003. The transition adjustment resulting from the adoption of
SFAS No. 143 has been reported as a cumulative effect of a change in
accounting principle.

In April 2003, the FASB issued Statement of Financial Accounting Standards
No. 149, Amendment of Statement No. 133 on Derivative Instruments and
Hedging Activities ("SFAS No. 149"). SFAS No. 149 amendments require that
contracts with comparable characteristics be accounted for similarly,
clarifies when a contract with an initial investment meets the
characteristic of a derivative and clarifies when a derivative requires
special reporting in the statement of cash flows. SFAS No. 149 is
effective for hedging relationships designated and for contracts entered
into or modified after June 30, 2003, except for provisions that relate to
SFAS No. 133 Statement Implementation Issues that have been effective for
fiscal quarters prior to June 15, 2003, should be applied in accordance
with their respective effective dates and certain provisions relating to
forward purchases or sales of when-issued securities or other securities
that do not yet exist, should be applied to existing contracts as well as
new contracts entered into after June 30, 2003. Assessment by the Managing
General Partner revealed this pronouncement to have no impact on the
Partnership.

In May 2003, the FASB issued Statement of Financial Accounting Standards
No.150, Accounting for Certain Financial Instruments with Characteristics
of both Liabilities and Equity ("SFAS 150"). SFAS 150 establishes
standards for how an issuer classifies and measures certain financial
instruments with characteristics of both liabilities and equity. It
requires that an issuer classify a financial instrument that is within the
scope of SFAS 150 as a liability (or an asset in some circumstances). Many
of those instruments were previously classified as equity. The application
of SFAS 150 is not expected to have a material effect on the Partnership's
consolidated financial statements. This Statement is effective for
financial instruments entered into or modified after May 31, 2003, and
otherwise is effective at the beginning of the first interim period
beginning after June 15, 2003.




Item 3. Quantitative and Qualitative Disclosures About Market Risk

The Partnership is not a party to any derivative or embedded
derivative instruments.

Item 4. Controls and Procedures

(a) Evaluation of Disclosure Controls and Procedures. The chief executive
officer and chief financial officer of the Partnership's Managing General
Partner have evaluated the effectiveness of the design and operation of the
Partnership's disclosure controls and procedures (as defined in Exchange
Act Rule 13a-14(c)) as of a date within 90 days of the filing date of this
quarterly report. Based on that evaluation, the chief executive officer and
chief financial officer have concluded that the Partnership's disclosure
controls and procedures are effective to ensure that material information
relating to the Partnership and the Partnership's consolidated subsidiaries
is made known to such officers by others within these entities,
particularly during the period this quarterly report was prepared, in order
to allow timely decisions regarding required disclosure.

(b) Changes in Internal Controls. There have not been any significant
changes in the Partnership's internal controls or in other factors that
could significantly affect these controls subsequent to the date of their
evaluation.



PART II. - OTHER INFORMATION


Item 1. Legal Proceedings

None

Item 2. Changes in Securities

None

Item 3. Defaults Upon Senior Securities

None

Item 4. Submission of Matter to a Vote of Security Holders

None

Item 5. Other Information

None

Item 6. Exhibits and Reports on Form 8-K

(a) Exhibits:

31.1 Rule 13a-14(a)/15d-14(a) Certification
31.2 Rule 13a-14(a)/15d-14(a) Certification
32.1 Certification of Chief Executive Officer Pursuant
to 18 U.S.C. Section
1350, as
adopted Pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002
32.2 Certification of Chief Financial Officer Pursuant
to 18 U.S.C. Section
1350, as
adopted Pursuant to Section 906 of the Sarbanes-Oxley Act
of 2002



(b) Reports on Form 8-K:

No reports on Form 8-K were filed during the quarter ended
June 30, 2003.


SIGNATURES


Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

SOUTHWEST OIL & GAS
INCOME FUND X-A, L.P.
a Delaware limited partnership


By: Southwest Royalties, Inc.
Managing General Partner


By: /s/ Bill E. Coggin
------------------------------------
- ----
Bill E. Coggin, Vice President
and Chief Financial Officer

Date: November 12, 2003




SECTION 302 CERTIFICATION Exhibit 31.1


I, H.H. Wommack, III, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Southwest Oil &
Gas Income Fund X-A, L.P.,

2.Based on my knowledge, this report does not contain any untrue statement
of a material fact or omit to state a material fact necessary to make
the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered
by this report;

3.Based on my knowledge, the financial statements, and other financial
information included in this report, fairly present in all material
respects the financial condition, results of operations and cash flows
of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for
establishing and maintaining disclosure controls and procedures (as
defined in Exchange Act Rules 13a-15(e) and 15-15(e)) and internal
control over financial reporting (as defined in Exchange Act Rules 13a-
15(f) and 15d-15(f) for the registrant and have:

a)Designed such disclosure controls and procedures, or caused such
disclosure controls and procedures to be designed under our
supervision, to ensure that material information relating to the
registrant, including its consolidated subsidiaries, is made known to
us by others within those entities, particularly during the period in
which this report is being prepared;

b)Designed such internal control over financial reporting, or caused
such internal control over financial reporting to be designed under
our supervision, to provide reasonable assurance regarding the
reliability of financial reporting and the preparation of financial
statements for external purposes in accordance with generally accepted
accounting principles;

c)Evaluated the effectiveness of the registrant's disclosure controls
and procedures and presented in this report our conclusions about the
effectiveness of the disclosure controls and procedures, as of the end
of the period covered by this report based on such evaluation; and

d)Disclosed in this report any change in the registrant's internal
control over financial reporting that occurred during the registrant's
most recent fiscal quarter (the registrant's fourth fiscal quarter in
the case of an annual report) that has materially affected, or is
reasonably likely to materially affect, the registrant's internal
control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based
on our most recent evaluation of internal control over financial
reporting, to the registrant's auditors and the audit committee of
registrant's board of directors (or persons performing the equivalent
functions):

a)All significant deficiencies and material weaknesses in the design or
operation of internal controls over financial reporting which
reasonably likely to adversely affect the registrant's ability to
record, process, summarize and report financial information; and

b)Any fraud, whether or not material, that involves management or other
employees who have a significant role in the registrant's internal
controls over financial reporting.


Date: November 12, 2003 /s/ H. H. Wommack, III
H. H. Wommack, III
Chairman, President and Chief Executive
Officer
of Southwest Royalties, Inc., the
Managing General Partner of
Southwest Oil & Gas Income Fund X-A,
L.P.




SECTION 302 CERTIFICATION Exhibit 31.2


I, Bill E. Coggin, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Southwest Oil &
Gas Income Fund X-A, L.P.

2.Based on my knowledge, this report does not contain any untrue statement
of a material fact or omit to state a material fact necessary to make
the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered
by this report;

3.Based on my knowledge, the financial statements, and other financial
information included in this report, fairly present in all material
respects the financial condition, results of operations and cash flows
of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for
establishing and maintaining disclosure controls and procedures (as
defined in Exchange Act Rules 13a-15(e) and 15-15(e)) and internal
control over financial reporting (as defined in Exchange Act Rules 13a-
15(f) and 15d-15(f) for the registrant and have:

a)Designed such disclosure controls and procedures, or caused such
disclosure controls and procedures to be designed under our
supervision, to ensure that material information relating to the
registrant, including its consolidated subsidiaries, is made known to
us by others within those entities, particularly during the period in
which this report is being prepared;

b)Designed such internal control over financial reporting, or caused
such internal control over financial reporting to be designed under
our supervision, to provide reasonable assurance regarding the
reliability of financial reporting and the preparation of financial
statements for external purposes in accordance with generally accepted
accounting principles;

c)Evaluated the effectiveness of the registrant's disclosure controls
and procedures and presented in this report our conclusions about the
effectiveness of the disclosure controls and procedures, as of the end
of the period covered by this report based on such evaluation; and

d)Disclosed in this report any change in the registrant's internal
control over financial reporting that occurred during the registrant's
most recent fiscal quarter (the registrant's fourth fiscal quarter in
the case of an annual report) that has materially affected, or is
reasonably likely to materially affect, the registrant's internal
control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based
on our most recent evaluation of internal control over financial
reporting, to the registrant's auditors and the audit committee of
registrant's board of directors (or persons performing the equivalent
functions):

a)All significant deficiencies and material weaknesses in the design or
operation of internal controls over financial reporting which
reasonably likely to adversely affect the registrant's ability to
record, process, summarize and report financial information; and

b)Any fraud, whether or not material, that involves management or other
employees who have a significant role in the registrant's internal
controls over financial reporting.


Date: November 12, 2003 /s/ Bill E. Coggin
Bill E. Coggin
Executive Vice President
and Chief Financial Officer of
Southwest Royalties, Inc., the
Managing General Partner of
Southwest Oil & Gas Income Fund X-A,
L.P.





CERTIFICATION PURSUANT TO Exhibit 32.1
19 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Quarterly Report of Southwest Oil & Gas Income
Fund X-A, Limited Partnership (the "Company") on Form 10-Q for the period
ending June 30, 2003 as filed with the Securities and Exchange Commission
on the date hereof (the "Report"), I, H.H. Wommack, III, Chief Executive
Officer of the Managing General Partner of the Company, certify, pursuant
to 18 U.S.C. 1350, as adopted pursuant to 906 of the Sarbanes-Oxley Act
of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results
of operation of the
Company.


Date: November 12, 2003




/s/ H.H. Wommack, III
H. H. Wommack, III
Chairman, President, Director and Chief Executive Officer
of Southwest Royalties, Inc., the
Managing General Partner of
Southwest Oil & Gas Income Fund X-A, L.P.


CERTIFICATION PURSUANT TO Exhibit 32.2
19 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Quarterly Report of Southwest Oil & Gas Income
Fund X-A, Limited Partnership (the "Company") on Form 10-Q for the period
ending June 30, 2003 as filed with the Securities and Exchange Commission
on the date hereof (the "Report"), I, Bill E. Coggin, Chief Financial
Officer of the Managing General Partner of the Company, certify, pursuant
to 18 U.S.C. 1350, as adopted pursuant to 906 of the Sarbanes-Oxley Act
of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results
of operation of the
Company.


Date: November 12, 2003




/s/ Bill E. Coggin
Bill E. Coggin
Executive Vice President
and Chief Financial Officer of
Southwest Royalties, Inc., the
Managing General Partner of
Southwest Oil & Gas Income Fund X-A, L.P.