As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON DISASSEMBLY OF ENGINE FOR METAL, CHECKED BOLT TIGHTNESS BY MOVING COVER AND BODY ASSY. ACTUAL TORQUE ON BOLTS WAS ONLY 15 INCHES/POUNDS. THREE EACH BLEED VALVE COVER BOLTS WERE NOT TORQUED TO SPECS FROM FACTORY OR BOLTS ARE STRETCHING AFTER ASSEMBLY AND TORQUING.