As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT AIRCRAFT 100 HOUR ENGINE WAS FOUND WITH TIGHT SPOT. REMOVED ENGINE ACCYS AND FOUND GOVERNOR SHAFT NOT TURNING DISASSEMBLED ENGINE. FOUND GOVERNOR IDLER GEAR SHAFT (PN 70384) BROKEN IN 3 PARTS; ALL GOV GEARS HAD RG TEETH, 1 OF 2 KNOWN FAILURES, ON SHAFT (PN 70384) WITH SAME SERIAL/ BATCH NUMBERS.