As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING RUN-UP, FOLLOWING ANNUAL INSPECTION, NO VACUUM INDICATION OBSERVED FROM REAR ENGINE. REMOVED PUMP FOR REPLACEMENT AND OBSERVED DRIVE ON ENGINE DID NOT TURN WITH PROPELLER. REMOVED ACCESSORY DRIVE COVER AND FOUND NO TEETH LEFT ON DRIVING BEVEL GEAR. DRIVEN GEAR WAS NOT WORN.