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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549



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FORM 10-Q



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



For the quarterly period ended June 30, 2005



Or



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



For the transition period from  to



Commission File No. 333-85994-01



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MEWBOURNE ENERGY PARTNERS 03-A, L.P.



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|                                                         |  |                                        
|-------------------------------------------------------- |  | ---------------------------------------
|Delaware                                                 |  | 27-0055431                             
|(State or jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification Number)



|                                         |  |           
|---------------------------------------- |  | ----------
|3901 South Broadway, Tyler, Texas        |  | 75701     
|(Address of principal executive offices) |  | (Zip code)



Registrants
Telephone Number, including area code: (903) 561-2900



Not Applicable

(Former name, former address and former fiscal year, if changed since last report)



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Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 of 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.    x  Yes    No ̈



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Mewbourne Energy Partners 03-A, L.P.



INDEX



|              |  |                                                                                                                                        |  |         
|------------- |  | -------------------------------------------------------------------------------------------------------------------------------------- |  | --------
|              |  |                                                                                                                                        |  | Page No.
|Part I       |  | Financial Information                                                                                                                  |  |         
|              |  |                                                                                                                                       
|Item 1.       |  | Financial Statements                                                                                                                   |  |         
|              |  |                                                                                                                                       
|              |  | Balance Sheets -June 30, 2005 (Unaudited) and December 31, 2004                                                                        |  | 3       
|              |  |                                                                                                                                       
|              |  | Statements of Operations (Unaudited) -For the three months ended June 30, 2005 and 2004 andthe six months ended June 30, 2005 and 2004 |  | 4       
|              |  |                                                                                                                                       
|              |  | Statements of Cash Flows (Unaudited) -For the six months ended June 30, 2005 and 2004                                                  |  | 5       
|              |  |                                                                                                                                       
|              |  | Statement of Changes In Partners Capital (Unaudited) -For the six months ended June 30, 2005                                          |  | 6       
|              |  |                                                                                                                                       
|              |  | Notes to Financial Statements                                                                                                          |  | 7       
|              |  |                                                                                                                                       
|Item 2.       |  | Managements Discussion and Analysis of Financial Condition and Results of Operations                                                  |  | 10      
|              |  |                                                                                                                                       
|Item 4.       |  | Disclosure Controls and Procedures                                                                                                     |  | 13      
|              |  |                                                                                                                                       
|Part II      |  | Other Information                                                                                                                      |  |         
|              |  |                                                                                                                                       
|Item 1.       |  | Legal Proceedings                                                                                                                      |  | 13      
|              |  |                                                                                                                                       
|Item 6.       |  | Exhibits and Reports on Form 8-K                                                                                                       |  | 13      



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Mewbourne Energy Partners 03-A, L.P.



Part I  Financial Information



Item 1. Financial Statements



BALANCE SHEETS

June 30, 2005 and December 31, 2004



|                                                          |  |               |            |   |                   |   |            |  
|--------------------------------------------------------- |  | ------------- | ---------- | - | ----------------- | - | ---------- | -
|                                                          |  | June 30, 2005 |            |   | December 31, 2004 |  
|                                                          |  | (Unaudited)   |            |   |                   |  
|ASSETS                                                    |  |               |            |   |                   |   |            |  
|                                                          |  |              
|Cash and cash equivalents                                 |  | $             | 335        |   |                   | $ | 3,652      |  
|Accounts receivable, affiliate                            |  |               | 981,623    |   |                   |   | 1,689,829  |  
|                                                          |  |               |            |   |                   |   |            |  
|Total current assets                                      |  |               | 981,958    |   |                   |   | 1,693,481  |  
|                                                          |  |               |            |   |                   |   |            |  
|Prepaid well cost                                         |  |               |           |   |                   |   | 45,685     |  
|                                                          |  |              
|Oil and gas properties at cost, full cost method          |  |               | 18,978,522 |   |                   |   | 18,628,370 |  
|Less accumulated depreciation, depletion and amortization |  |               | (4,061,773 | ) |                   |   | (2,996,599 | )
|                                                          |  |               |            |   |                   |   |            |  
|                                                          |  |               | 14,916,749 |   |                   |   | 15,631,771 |  
|                                                          |  |               |            |   |                   |   |            |  
|Total assets                                              |  | $             | 15,898,707 |   |                   | $ | 17,370,937 |  
|                                                          |  |               |            |   |                   |   |            |  
|LIABILITIES AND PARTNERS CAPITAL                         |  |               |            |   |                   |   |            |  
|                                                          |  |              
|Accounts payable, affiliate                               |  | $             | 329,173    |   |                   | $ | 327,467    |  
|                                                          |  |               |            |   |                   |   |            |  
|Asset retirement obligation plugging liability            |  |               | 391,093    |   |                   |   | 379,022    |  
|                                                          |  |               |            |   |                   |   |            |  
|Partners capital                                         |  |               |            |   |                   |   |            |  
|General partners                                          |  |               |           |   |                   |   | 14,911,908 |  
|Limited partners                                          |  |               | 15,178,441 |   |                   |   | 1,752,540  |  
|                                                          |  |               |            |   |                   |   |            |  
|Total partners capital                                   |  |               | 15,178,441 |   |                   |   | 16,664,448 |  
|                                                          |  |               |            |   |                   |   |            |  
|Total liabilities and partners capital                   |  | $             | 15,898,707 |   |                   | $ | 17,370,937 |  
|                                                          |  |               |            |   |                   |   |            |  



The accompanying notes
are an integral part of the financial statements.



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Mewbourne Energy Partners 03-A, L.P.



STATEMENTS OF OPERATIONS

For the three months ended June 30, 2005 and 2004 and

the six months ended June 30, 2005 and 2004

(Unaudited)



|                                                                                                     |  |                             |           |                           |   |           |  |      |           |  |   |          
|---------------------------------------------------------------------------------------------------- |  | --------------------------- | --------- | ------------------------- | - | --------- |  | ---- | --------- |  | - | ---------
|                                                                                                     |  | Three Months Ended June 30, |           | Six Months Ended June 30,
|                                                                                                     |  | 2005                        |           | 2004                      |   | 2005      |  | 2004
|Revenues and other income:                                                                           |  |                             |           |                           |   |           |  |      |           |  |   |          
|                                                                                                     |  |                             |           |                          
|Oil and gas sales                                                                                    |  | $                           | 1,531,004 |                           | $ | 2,260,063 |  | $    | 3,082,060 |  | $ | 3,373,690
|Interest income                                                                                      |  |                             | 442       |                           |   | 6,833     |  |      | 1,626     |  |   | 16,067   
|                                                                                                     |  |                             |           |                           |   |           |  |      |           |  |   |          
|Total revenues and other income                                                                      |  |                             | 1,531,446 |                           |   | 2,266,896 |  |      | 3,083,686 |  |   | 3,389,757
|                                                                                                     |  |                             |           |                           |   |           |  |      |           |  |   |          
|Expenses:                                                                                            |  |                             |           |                           |   |           |  |      |           |  |   |          
|                                                                                                     |  |                             |           |                          
|Lease operating expense                                                                              |  |                             | 111,259   |                           |   | 90,056    |  |      | 221,761   |  |   | 146,382  
|Production taxes                                                                                     |  |                             | 125,995   |                           |   | 179,082   |  |      | 244,427   |  |   | 275,837  
|Administrative and general expense                                                                   |  |                             | 71,792    |                           |   | 47,619    |  |      | 152,199   |  |   | 67,418   
|Depreciation, depletion, and amortization                                                            |  |                             | 524,957   |                           |   | 768,476   |  |      | 1,065,174 |  |   | 1,246,314
|Asset retirement obligation accretion                                                                |  |                             | 3,429     |                           |   | 5,260     |  |      | 9,894     |  |   | 10,178   
|                                                                                                     |  |                             |           |                           |   |           |  |      |           |  |   |          
|Net income                                                                                           |  | $                           | 694,014   |                           | $ | 1,176,403 |  | $    | 1,390,231 |  | $ | 1,643,628
|                                                                                                     |  |                             |           |                           |   |           |  |      |           |  |   |          
|Allocation of net income:                                                                            |  |                             |           |                           |   |           |  |      |           |  |   |          
|General partners                                                                                     |  | $                           |          |                           | $ | 1,052,684 |  | $    |          |  | $ | 1,470,773
|                                                                                                     |  |                             |           |                           |   |           |  |      |           |  |   |          
|Limited partners                                                                                     |  | $                           | 694,014   |                           | $ | 123,719   |  | $    | 1,390,231 |  | $ | 172,855  
|                                                                                                     |  |                             |           |                           |   |           |  |      |           |  |   |          
|Basic and diluted net income per limited and general partner interest (18,000 interests outstanding) |  | $                           | 38.56     |                           | $ | 65.36     |  | $    | 77.24     |  | $ | 91.31    
|                                                                                                     |  |                             |           |                           |   |           |  |      |           |  |   |          



The accompanying notes
are an integral part of the financial statements.



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Mewbourne Energy Partners 03-A, L.P.



STATEMENTS OF CASH FLOWS

For the six months ended June 30, 2005 and 2004

(Unaudited)



|                                                                                 |  |      |            |   |      |   |            |  
|-------------------------------------------------------------------------------- |  | ---- | ---------- | - | ---- | - | ---------- | -
|                                                                                 |  | 2005 |            |   | 2004 |  
|Cash flows from operating activities:                                            |  |      |            |   |      |   |            |  
|Net income                                                                       |  | $    | 1,390,231  |   |      | $ | 1,643,628  |  
|Adjustment to reconcile net income to net cash provided by operating activities: |  |      |            |   |      |   |            |  
|Depreciation, depletion, and amortization                                        |  |      | 1,065,174  |   |      |   | 1,246,314  |  
|Asset retirement obligation accretion                                            |  |      | 9,894      |   |      |   | 10,178     |  
|Changes in operating assets and liabilities:                                     |  |      |            |   |      |   |            |  
|Accounts receivable, affiliate                                                   |  |      | 708,206    |   |      |   | (3,160,365 | )
|Accounts payable, affiliate                                                      |  |      | 1,706      |   |      |   | 1,049,557  |  
|                                                                                 |  |      |            |   |      |   |            |  
|Net cash provided by operating activities                                        |  |      | 3,175,211  |   |      |   | 789,312    |  
|                                                                                 |  |      |            |   |      |   |            |  
|Cash flows from investing activities:                                            |  |      |            |   |      |   |            |  
|Purchase and development of oil and gas properties                               |  |      | (302,290   | ) |      |   | (2,925,169 | )
|                                                                                 |  |      |            |   |      |   |            |  
|Net cash used in investing activities                                            |  |      | (302,290   | ) |      |   | (2,925,169 | )
|                                                                                 |  |      |            |   |      |   |            |  
|Cash flows from financing activities:                                            |  |      |            |   |      |   |            |  
|Cash distributions to partners                                                   |  |      | (2,876,238 | ) |      |   | (1,670,000 | )
|                                                                                 |  |      |            |   |      |   |            |  
|Net cash used in financing activities                                            |  |      | (2,876,238 | ) |      |   | (1,670,000 | )
|                                                                                 |  |      |            |   |      |   |            |  
|Net decrease in cash and cash equivalents                                        |  |      | (3,317     | ) |      |   | (3,805.857 | )
|                                                                                 |  |     
|Cash and cash equivalents, beginning of period                                   |  |      | 3,652      |   |      |   | 5,551,936  |  
|                                                                                 |  |      |            |   |      |   |            |  
|Cash and cash equivalents, end of period                                         |  | $    | 335        |   |      | $ | 1,746,079  |  
|                                                                                 |  |      |            |   |      |   |            |  



The accompanying notes
are an integral part of the financial statements.



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Mewbourne Energy Partners 03-A, L.P.



STATEMENT OF CHANGES IN PARTNERS CAPITAL

For the six months ended June 30, 2005

(Unaudited)



|                                                                     |  |                  |             |   |                  |   |            |       |  |   |            |  
|-------------------------------------------------------------------- |  | ---------------- | ----------- | - | ---------------- | - | ---------- | ----- |  | - | ---------- | -
|                                                                     |  | General Partners |             |   | Limited Partners |   |            | Total | 
|Balance at December 31, 2004                                         |  | $                | 14,911,908  |   |                  | $ | 1,752,540  |       |  | $ | 16,664,448 |  
|Conversion of general partner interests to limited partner interests |  |                  | (14,911,908 | ) |                  |   | 14,911,908 |       |  |   |           |  
|Cash distributions                                                   |  |                  |            |   |                  |   | (2,876,238 | )     |  |   | (2,876,238 | )
|Net income                                                           |  |                  |            |   |                  |   | 1,390,231  |       |  |   | 1,390,231  |  
|                                                                     |  |                  |             |   |                  |   |            |       |  |   |            |  
|Balance at June 30, 2005                                             |  | $                |            |   |                  | $ | 15,178,441 |       |  | $ | 15,178,441 |  
|                                                                     |  |                  |             |   |                  |   |            |       |  |   |            |  



The accompanying notes
are an integral part of the financial statements.



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Mewbourne Energy Partners 03-A, L.P.



NOTES TO FINANCIAL STATEMENTS

(Unaudited)



1. Accounting Policies



Reference is hereby made to the Partnerships Annual Report on Form 10-K for 2004, which contains a summary of significant accounting policies followed by the partnership in the preparation of its financial
statements. These policies are also followed in preparing the quarterly report included herein.



In the opinion of management, the accompanying unaudited financial statements contain all adjustments of a normal recurring nature necessary to present fairly our financial position, results of operations, cash flows
and partners capital for the periods presented. The results of operations for the interim periods are not necessarily indicative of the final results expected for the full year.



2. Accounting for Oil and Gas Producing Activities



Mewbourne Energy Partners 03-A, L.P., (the Partnership), a Delaware limited partnership is engaged primarily in oil and gas development and production in
Texas, Oklahoma, and New Mexico, and was organized on February 19, 2003. The offering of limited and general partnership interests began May 16, 2003 as a part of an offering registered under the name Mewbourne Energy Partners 02-03 Drilling
Programs, (the Program), and concluded July 9, 2003, with total investor contributions of $18,000,000 originally being sold to 710 subscribers of which $16,107,005 were sold to 644 subscribers as general partner interests and $1,892,995
were sold to 66 subscribers as limited partner interests. During the quarter ended March 31, 2005, all general partner interests were converted to limited partner interests and accordingly all partnership interests have been reflected in the
accompanying financial statements as limited partner interests.



The
Partnership follows the full-cost method of accounting for its oil and gas activities. Under the full-cost method, all productive and non-productive costs incurred in the acquisition, exploration and development of oil and gas properties are
capitalized. Depreciation, depletion and amortization of oil and gas properties subject to amortization is computed on the units-of-production method based on the proved reserves underlying the oil and gas properties. At June 30, 2005 and 2004 all
capitalized costs were subject to amortization. Proceeds from the sale or other disposition of properties are credited to the full cost pool. Gains and losses on the sale or other disposition of properties are not recognized unless such adjustments
would significantly alter the relationship between capitalized costs and the proved oil and gas reserves. Capitalized costs are subject to a quarterly ceiling test that limits such costs to the aggregate of the present value of future net cash flows
of proved reserves and the lower of cost or fair value of unproved properties.



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3. Asset Retirement Obligations



In accordance with Financial Accounting Standards Board Statement No. 143, Accounting for Asset Retirement Obligations, the Partnership has recognized an
estimated liability for future plugging and abandonment costs. The estimated liability is based on historical experience and estimated well life. The liability is discounted using the credit-adjusted risk-free rate. Revisions to the liability could
occur due to changes in well plugging and abandonment costs or well useful lives, or if federal or state regulators enact new well restoration requirements. The Partnership recognizes accretion expense in connection with the discounted liability
over the remaining life of the well.



A reconciliation of the
Partnerships liability for well plugging and abandonment costs for the six months ended June 30, 2005, is as follows:



|                             |  |   |        
|---------------------------- |  | - | -------
|Balance, beginning of period |  | $ | 379,022
|Liabilities incurred         |  |   | 2,177  
|Accretion expense            |  |   | 9,894  
|                             |  |   |        
|Balance, end of period       |  | $ | 391,093
|                             |  |   |        



4. Related Party Transactions



Mewbourne Development Corporation (MD) is managing general partner and
Mewbourne Oil Company (MOC) is operator of oil and gas properties owned by the Partnership. Mewbourne Holdings, Inc. is the parent of both MD and MOC. Substantially all transactions are with MD and MOC.



In the ordinary course of business, MOC will incur certain costs that will be passed on to
well owners of the well on which the costs were incurred. The partnership will receive their portion of these costs based upon their ownership in each well incurring the costs. These costs are referred to as Operator charges and are standard and
customary in the oil and gas industry. Operator charges include recovery of gas marketing costs, fixed rate overhead, supervision, pumping, and equipment furnished by the Operator. Services and operator charges are billed in accordance with the
program and partnership agreements.



In general, during any particular calendar
year the total amount of administrative expenses allocated to the Partnership shall not exceed the greater of (a) 3.5% of the Partnerships gross revenue from the sale of oil and natural gas production during each year (calculated without any
deduction for operating costs or other costs and expenses) or (b) the sum of $50,000 plus .25% of the capital contributions of limited and general partners.



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The Partnership participates in oil and gas activities through a Drilling Program Agreement, the Program. The Partnership
and MD are parties to the Program agreement. The costs and revenues of the Program are allocated to MD and the Partnership as follows:



|                                                                                                       |  |             |   |  |     |  
|------------------------------------------------------------------------------------------------------ |  | ----------- | - |  | --- | -
|                                                                                                       |  | Partnership |   |  | MD  |  
|Revenues:                                                                                              |  |             |   |  |     |  
|Proceeds from disposition of depreciable and depletable properties                                     |  | 60          | % |  | 40  | %
|All other revenues                                                                                     |  | 60          | % |  | 40  | %
|Costs and expenses:                                                                                    |  |             |   |  |     |  
|Organization and offering costs (1)                                                                    |  | 0           | % |  | 100 | %
|Lease acquisition costs (1)                                                                            |  | 0           | % |  | 100 | %
|Tangible and intangible drilling costs (1)                                                             |  | 100         | % |  | 0   | %
|Operating costs, reporting and legal expenses, general and administrative expenses and all other costs |  | 60          | % |  | 40  | %

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|(1) | As noted above, pursuant to the Program, MD must contribute 100% of organization and offering costs and lease acquisition costs which will approximate 30% of total capital costs. To
the extent that organization and offering costs and lease acquisition costs are less that 30% of total capital costs, MD is responsible for tangible drilling costs until its share of the Programs total capital costs reaches approximately 30%.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



The Partnerships financial statements reflect its
respective proportionate interest in the Program.



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



Liquidity and Capital Resources



Mewbourne Energy Partners 03-A, L.P. (the Partnership) was formed February 19, 2003. The offering of limited and general partnership interests began May 16,
2003 and concluded July 9, 2003, with total investor contributions of $18,000,000. During the quarter ended March 31, 2005, all general partner interests were converted to limited partner interests and accordingly all partnership interests have been
reflected in the accompanying financial statements as limited partner interests.



The Partnership has acquired interests in oil and gas prospects for the purpose of development drilling. The Partnership participated in the drilling of 71 wells. 64 wells were productive and 7 wells were abandoned.



Future capital requirements and operations will be conducted with available funds generated
from oil and gas activities. No bank borrowing is anticipated. The Partnership had net working capital of $652,785 at June 30, 2005.



During the six months ended June 30, 2005, the Partnership made cash distributions to the investor partners in the amount of $2,876,238 as compared to $1,670,000 for the
six months ended June 30, 2004. The Partnership expects that cash distributions will continue during 2005 as additional oil and gas revenues are sufficient to produce cash flows from operations.



The sale of crude oil and natural gas produced by the Partnership will be affected by a
number of factors that are beyond the Partnerships control. These factors include the price of crude oil and natural gas, the fluctuating supply of and demand for these products, competitive fuels, refining, transportation, extensive federal
and state regulations governing the production and sale of crude oil and natural gas, and other competitive conditions. It is impossible to predict with any certainty the future effect of these factors on the Partnership.



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Results of Operations



Three months ended June 30, 2005 as compared to the three months ended June 30, 2004.



Oil and gas revenues.



|                  |  |                             |           |      |   |          
|----------------- |  | --------------------------- | --------- | ---- | - | ---------
|                  |  | Three Months Ended June 30,
|                  |  | 2005                        |           | 2004
|Oil and gas sales |  | $                           | 1,531,004 |      | $ | 2,260,063
|Barrels produced  |  |                             | 3,488     |      |   | 8,078    
|Mcf produced      |  |                             | 220,146   |      |   | 359,700  
|Average price/bbl |  | $                           | 50.70     |      | $ | 36.87    
|Average price/mcf |  | $                           | 6.15      |      | $ | 5.46     



As shown in the table above, total oil
and gas sales decreased $729,059 (32.3%) for the three months ended June 30, 2005 as compared to the three months ended June 30, 2004. Of this decrease, $232,716 and $857,975, respectively, were related to decreases in volumes of oil and gas sold.
Volumes of oil and gas sold decreased 4,590 bbls of oil and 139,554 mcf of gas for the three months ended June 30, 2005 as compared to the three months ended June 30, 2004. The decrease in volumes of oil sold was primarily due to a substantial
decline in the production of two wells. The decrease in volumes of gas sold was primarily due to a substantial decline in the production of two wells and overall normal declines in production. The wells with a substantial decline in production are
not expected to return to previous levels of production. These decreases were partially offset by increases of $111,694 and $249,938, respectively, related to increases in the average prices of oil and gas sold. Average oil and gas prices increased
to $50.70 per bbl and $6.15 per mcf for the three months ended June 30, 2005 from $36.87 per bbl and $5.46 per mcf for the three months ended June 30, 2004.



Interest income. Interest income was $442 during the three months ended June 30, 2005 as compared to $6,833 during the three months period ended June 30, 2004. The
decrease is primarily due to the decrease in funds available for investment.



Lease operations and production taxes. Lease operating expense during the period ended June 30, 2005 totaled $111,259 as compared to $90,056 for the period ended June 30, 2004. Lease operating expense increased primarily due to the workover
of one well and the addition of 11 new wells in the period ended June 30, 2005. Production taxes during the period ended June 30, 2005 total $125,995 compared to $179,082 for the period ended June 30, 2004. The decrease in production taxes is due to
the decrease in oil and gas revenues.



Depreciation, depletion and
amortization. Depreciation, depletion and amortization for the three month period ended June 30, 2005 total $524,957 compared to $768,476 for the three month period ended June 30, 2004. The decrease is due to the decline in production volumes.



Administrative and general expense. Administrative and general expense for the
three month period ended June 30, 2005 total $71,792 compared to $47,619 for the period ended June 30, 2004. The increase is primarily due to the timing of administrative costs and higher general expenses for reporting costs.



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##### Table of Contents

Six months ended June 30, 2005 as compared to the six months ended June 30, 2004.



Oil and gas revenues.



|                  |  |                           |           |      |   |          
|----------------- |  | ------------------------- | --------- | ---- | - | ---------
|                  |  | Six Months Ended June 30,
|                  |  | 2005                      |           | 2004
|Oil and gas sales |  | $                         | 3,082,060 |      | $ | 3,373,690
|Barrels produced  |  |                           | 6,479     |      |   | 11,630   
|Mcf produced      |  |                           | 465,948   |      |   | 555,066  
|Average price/bbl |  | $                         | 49.27     |      | $ | 35.87    
|Average price/mcf |  | $                         | 5.93      |      | $ | 5.33     



As shown in the table above, total oil
and gas sales decreased $291,630 (8.6%) for the six months ended June 30, 2005 as compared to the six months ended June 30, 2004. Of this decrease, $253,838 and $528,675, respectively, were related to decreases in volumes of oil and gas sold.
Volumes of oil and gas sold decreased 5,151 bbls of oil and 89,118 mcf of gas for the six months ended June 30, 2005 as compared to the six months ended June 30, 2004. The decrease in volumes of oil sold was primarily due to a substantial decline in
the production of three wells. The decrease in volumes of gas sold was primarily due to a substantial decline in the production of two wells and overall normal declines in production. The wells with a substantial decline in production are not
expected to return to previous levels of production. These decreases were partially offset by increases of $155,820 and $335,063, respectively, related to increases in the average prices of oil and gas sold. Average oil and gas prices increased to
$49.27 per bbl and $5.93 per mcf for the six months ended June 30, 2005 from $35.87 per bbl and $5.33 per mcf for the six months ended June 30, 2004.



Interest income. Interest income was $1,626 during the six months ended June 30, 2005 as compared to $16,067 during the six months period ended June 30, 2004. The
decrease is primarily due to the decrease in funds available for investment.



Lease operations and production taxes. Lease operating expense during the period ended June 30, 2005 totaled $221,761 as compared to $146,382 for the period ended June 30, 2004. Production taxes during the period ended June 30, 2005 total
$244,427 compared to $275,837 for the period ended June 30, 2004. Lease operating expense increased primarily due to the workover of one well and the addition of 11 new wells in the period ended June 30, 2005. The decrease in production taxes is due
to the decrease in oil and gas revenues.



Depreciation, depletion and
amortization. Depreciation, depletion and amortization for the six month period ended June 30, 2005 total $1,065,174 compared to $1,246,314 for the six month period ended June 30, 2004. The decrease is due to the decline in production volumes.



Administrative and general expense. Administrative and general expense for the
six month period ended June 30, 2005 total $152,199 compared to $67,418 for the period ended June 30, 2004. The increase is primarily due to the timing of administrative costs and higher general expenses for reporting costs.



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##### Table of Contents

Item 4. Disclosure Controls and Procedures



Mewbourne
Development Corporation (MDC), the Managing General Partner of the Partnership, maintains a system of controls and procedures designed to provide reasonable assurance as to the reliability of the financial statements and other
disclosures included in this report, as well as to safeguard assets from unauthorized use or disposition. Within 90 days prior to the filing of this report, MDCs Chief Executive Officer and Chief Financial Officer have evaluated the
effectiveness of the design and operation of our disclosure controls and procedures with the assistance and participation of other members of management. Based upon that evaluation, MDCs Chief Executive Officer and Chief Financial Officer
concluded that our disclosure controls and procedures are effective for gathering, analyzing and disclosing the information the Partnership is required to disclose in the reports it files under the Securities Exchange Act of 1934 within the time
periods specified in the SECs rules and forms. There have been no significant changes in MDCs internal controls or in other factors which could significantly affect internal controls subsequent to the date MDC carried out its evaluation.



Part II  Other Information



Item 1. Legal Proceedings



None.



Item 6. Exhibits and Reports on Form 8-K



(a) Exhibits filed herewith.



|     |  |                                                                            
|---- |  | ---------------------------------------------------------------------------
|31.1 |  | Certification of CEO Pursuant to Section 302 of Sarbanes-Oxley Act of 2002.
|     | 
|31.2 |  | Certification of CFO Pursuant to Section 302 of Sarbanes-Oxley Act of 2002.
|     | 
|32.1 |  | Certification of CEO Pursuant to Section 906 of Sarbanes-Oxley Act of 2002.
|     | 
|32.2 |  | Certification of CFO Pursuant to Section 906 of Sarbanes-Oxley Act of 2002.



(b) Reports on Form
8-K



None.



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##### Table of Contents

SIGNATURES



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



Mewbourne Energy Partners 03-A, L.P.By:

Mewbourne Development CorporationManaging General Partner




Date: August 15, 2005



By:

/s/ Alan ClarkAlan Clark, Treasurer




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##### Table of Contents

INDEX TO EXHIBITS



|              |  |                                                                            
|------------- |  | ---------------------------------------------------------------------------
|EXHIBITNUMBER |  | DESCRIPTION                                                                
|31.1          |  | Certification of CEO Pursuant to Section 302 of Sarbanes-Oxley Act of 2002.
|              | 
|31.2          |  | Certification of CFO Pursuant to Section 302 of Sarbanes-Oxley Act of 2002.
|              | 
|32.1          |  | Certification of CEO Pursuant to Section 906 of Sarbanes-Oxley Act of 2002.
|              | 
|32.2          |  | Certification of CFO Pursuant to Section 906 of Sarbanes-Oxley Act of 2002.



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