SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 31, 1998 PARKER & PARSLEY 90-C CONV., L.P. (Exact name of Registrant as specified in its charter) Delaware 33-26097-10 75-2347264 (State or other jurisdiction of Commission (I.R.S. Employer incorporation or organization) File Number Identification Number) 303 West Wall, Suite 101, Midland, Texas 79701 (Address of principal executive offices) (Zip code) Registrant's Telephone Number, including area code : (915) 683-4768 Not applicable (Former name, former address and former fiscal year, if changed since last report) Parker & Parsley 90-C Conv., L.P. Item 4. Changes in Registrant's Certifying Accountants The general partner of Parker & Parsley 90-C Conv., L.P. (the "Partnership"), Pioneer Natural Resources USA, Inc., has approved the engagement of Ernst & Young LLP as the Partnership's independent auditors for the fiscal year ending December 31, 1998. Ernst & Young LLP will replace the firm of KPMG Peat Marwick LLP, which was dismissed as auditors of the Partnership after completing the audit of the Partnership for the fiscal year ending December 31, 1997. The reports of KPMG Peat Marwick LLP on the Partnership's financial statements for the past two fiscal years did not contain an adverse opinion or a disclaimer of opinion and were not qualified or modified as to uncertainty, audit scope, or accounting principles. In connection with the audits of the Partnership's financial statements for each of the two fiscal years ended December 31, 1997 and 1996, there were no disagreements with KPMG Peat Marwick LLP on any matters of accounting principles or practices, financial statement disclosure, or auditing scope and procedures which, if not resolved to the satisfaction of KPMG Peat Marwick LLP would have caused KPMG Peat Marwick LLP to make reference to the matter in their report. The Partnership requested KPMG Peat Marwick LLP to furnish the Partnership with a letter addressed to the Securities and Exchange Commission stating whether KPMG Peat Marwick LLP agrees with the above statements. A copy of that letter is included as Exhibit 16.1 to the report on Form 8-K. 2 S I G N A T U R E S 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 hereunto duly authorized. PARKER & PARSLEY 90-C CONV., L.P. By: Pioneer Natural Resources USA, Inc. Managing General Partner Date: April 2, 1998 By: /s/ Rich Dealy ---------------------------------------- Rich Dealy Vice President and Chief Accounting Officer 3 Exhibit Index Page 16.1* Letter from the independent certified public accountants 5 * Filed herewith. 4 Exhibit 16.1 KPMG Peat Marwick LLP 300 North Marienfeld, Suite 300 Midland, Texas 79701 April 1, 1998 Securities and Exchange Commission Washington, D.C. 20549 Ladies and Gentlemen: We were previously principal accountants for Parker & Parsley 90-C Conv., L.P. and, under the date of March 20, 1998, we reported on the financial statements of Parker & Parsley 90-C Conv., L.P. as of and for the years ended December 31, 1997 and 1996. On March 28, 1998, our appointment as principal accountants was terminated. We have read Parker & Parsley 90-C Conv., L.P.'s statements included under Item 4 of its Form 8-K dated March 31, 1998 and we agree with such statements. Very truly yours, KPMG Peat Marwick LLP 5