As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING DISASSEMBLY OF THE ENGINE DUE TO ICE INGESTION, THE CARRIER ASSEMBLY WAS PULLED. CLOSER INSPECTION REVEALED THAT THE BEARING RETAINING NUT WAS SPINNING FREE (NO TORQUE) ON HE GEARSHAFT, HELD BY ONLY ONE TANG OF THE KEYWASHER. THE GEAR IN QUESTION IS AT THE 6 O''CLOCK POSITION, THE SOLID PART OF THE CARRIER ASSEMBLY.