As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) UPON INSPECTION, SPLINE/COUPLING P/N 9A1424 WAS FOUND WORN. REMOVED OIL PUMP AND TACH GENERATOR AND MATING COUPLING P/N 9A1424 FOR INSPECTION AND REPAIR. REPLAC ED WITH NEW GLOBE TACH GEN P/N 22A650 S/N 6209 AND OHC OIL PUMP P/N 206-140-190-005 S/N SPF82 AS REPLACEMENT OF SPLINE REQUIRES REPLACEMENT OF ALL MATING SURFACES.