As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) A SUDDEN MEDIUM FREQUENCY VIBRATION WAS FELT IN FLIGHT. A PRECAUTIONARY LANDING WAS CARRIED OUT. AFTER VISUAL INSPECTION, IT WAS DISCOVERED THAT THE TIP CAP FILLER HAD SEPARATED CAUSING THE VIBRATION. BOTH BLADES WERE REPLACED, THE TAIL ROTOR WAS BALANCED AND THE ACFT RETURNED TO SERVICE.