write Form 337 based on the following stc information Supplemental Type Certificate No. SA793CE Description Of type Design Change: Install Lycoming 0-360-( ) engine and Hartzell1 HCC2YK-18/7666A-2 or Sensenion 76EM855 or McCauley 1A 170EFA propeller. DATA REQUIRED: a. For Constant Speed Propeller equipped airplanes: 1. Avcon Installation Drawing PA28000 dated August 4, 1971, or Avcon Drawing List No. 14013 dated June 21, 1972, or later "FAA Approved" revision of these documents. 2. FAA Airplane Flight Manual Supplement dated August 4, 1971 or dated June 29, 1978, for the A-28-151, or dated October 20, 1983, for the PA-23-161 or later "FAA Approved" revisions. b. For Fixed Piten Propeller equipped airplanes: 1. Aveon Drawing List No. 23-140 dated January 1, 1988, or later "FAA Approved" revisions. 2. "FAA Approved" Airplane Flight Manual Supplements dated December 13, 1988, or later "FAA Approved" Limitations and Conditions: revisions. to PA-23-140 conversion limited to four-place models only. PA-28-150, -160 conversion limited serial Numbers 28-1 through 23-134 only. A-23-151 approved for Serial Numbers 28-7415001 and up. PA-28-161 approved for Serial Numbers 28-7716001 and up