As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING OPERATIONS, AIRCRAFT HAD FLUCTUATING OIL PRESSURE AND TORQUE. PILOT LANDED AIRCRAFT AND CALLED MAINTENANCE. MECHANIC INSPECTED AIRCRAFT AND PERFORMED GROUND RUN. MECHANIC DETERMINED THAT ENGINE OIL SCAVENGE PUMP WAS NOT SENDING ADEQUATE AMOUNT OF OIL TO SYSTEM.