What was found
PILOT REPORTED OIL ON LEFT ENGINE COWLING AFTER FLIGHT. PERFORMED GROUND RUN OF ENGINE AND FOUND PIN HOLE IN ENGINE DRIVEN OIL SUPPLY PUMP HOUSING.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PILOT REPORTED OIL ON LEFT ENGINE COWLING AFTER FLIGHT. PERFORMED GROUND RUN OF ENGINE AND FOUND PIN HOLE IN ENGINE DRIVEN OIL SUPPLY PUMP HOUSING.