As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AN ANNUAL INSPECTION, A RUB SPOT WAS FOUND ON THE SHORT SHAFT JUST AFT OF THE ENGINE. THIS IS A HARD AREA TO INSPECT WITH BOTH PIECES OF DRIVE SHAFT COVER IN PLACE. A CLOSE LOOK AT THIS AREA AT ANNUAL SHOULD BE DONE AS IT IS HARD TO SEE. THE REAR ENGINE MOUNTS WERE CHANGED AND THE PROBLEM WAS CORRECTED.