As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING AN UNRELATED UNSCHEDULED MX CHECK THE OUTPUT FLANGE WAS FOUND TO BE LOOSE, TOTAL LOSS OF TIGHTNESS. THE BEVEL GEARBOX WAS REMOVED, INSPECTED & REINSTALLED. SB 355-63.00.27 WAS COMPLETED WITH NEW FLANGE, STA-LOCK NUT & SECURING WASHER INSTALLED. THE ACFT HAD ONLY 66.6HRS TT.