As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON THOMAS COUPLING TORQUE CHECK TWO BOLTS FOUND LOOSE. ON INVESTIGATION OF BOLTS, THREADS FOUND TO BE STRIPPED OFF ON LOWER END. ALL OTHER BOLTS ON FORWARD DRIVESHAFT INSPECTED FOR SERVICEABILITY. BOLT REPLACED NEW AND TORQUED. CAUSE OF DIFFICULT MIGHT HAVE BEEN BOLTS UNDER TORQUED/OVER TORQUED. BETTER INSPECTION OF BOLTS WHEN REMOVING AND INSTALLING HARDWARE. COMPLY WITH 10-25 HOURS TORQUE CHECK INSPECTION IAW MANUFACTURER.