As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SCAVENGE PUMP MALFUNCTIONED DUE TO SEIZER OF THE ROTOR DRIVE SHAFT IN THE BUSHING OF THE HOUSING. HONEYWELL SERVICE BULLETIN TPE331-72-2074 REV.1 ADDRESSES THIS PROBLEM BY PUMP REPLACEMENT WITH P/N 3108282-1 AND RECOMMENDS COMPLIANCE AT ENGINE OVERHAUL OR IF THE PUMP REQUIRES REPLACEMENT. THIS SERVICE BULLETIN WAS COMPLETED AT THIS SHOP VISIT AND SHOULD PROVIDE A SUSTANTIAL IMPROVEMENT TO RELIABILITY.