As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING APPROACH THE PROPELLER SPEED DROPPED BELOW LIMITS. ENGINE WAS SHUTDOWN AND ACFT LANDED SAFELY. MAINTENANCE REPLACED THE PROPELLER VALVE HOUSING AND THE ACFT WAS RETURNED TO SERVICE. THE O/H FACILITY REPORTED SUBSTANDARD BEARINGS SUSPECTED.