What was found
DURING OVERHAUL DISASSEMBLY OF OIL PUMP, DISCOVERED WOODRUFF KEY DRIVE SHAFT AND SINTERED IRON GEARS. AD 75-08-09 REQUIRES REMOVAL OF THIS STYLE, BUT THIS SERIAL NUMBER IS OUTSIDE OF THOSE SPECIFIED BY LYCOMING. AD 81-18-04 CALLS FOR REPLACEMENT AT 2,000 HRS OR AT ACCY CASE DISASSEMBLY FOR SINTERED IRON OIL PUMP IMPELLERS. CURRENT AD 96-09-10 DOES SPECIFICY THIS ENGINE AS HAVING SINTERED IRON, BUT THIS STYLE OF DRIVE SHOULD HAVE BEEN REPLACED PER 75-08-09.