As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON MORNING WALK-AROUND, ENGINE WAS STIFF TO ROTATE. ENGINE REPLACED. ENGINE WAS DIS-ASSEMBLED BY FIELD REP AND FOUND THAT NR 2 TURBINE WHEEL TIE BOLT NUT WAS NOT THE ONE STATED IN THE LATEST SB (331-72-0592, 9/88). NUT P/N SHOULD HAVE BEEN 3108066-1 NOT 865082-1. PART TC: 31,937.