As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE PILOT NOTICED ON HIS DAILY INSPECTION THAT THE DRIVESHAFT TEMPLATES ON THE TRANSMISSION SIDE WERE ALL BLACK, INDICATING AN OVERTEMP ON THE COUPLING. THIS OCCURRED 4 HOURS AFTER THE 600 HOUR LUBRICATION INSPECTION OF THE DRIVESHAFT. AFTER CLOSE INSPECTION THERE WERE NO INDICATIONS OF IMPROPER GREASING. THE DRIVESHAFT WAS INSPECTED/REGREASED AND PUT INTO SERVICE.