As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT OBSERVED OIL AND EGT FLUCTUATIONS AND A LOW OIL PRESSURE LIGHT. DID A PRECAUTIONARY ENGINE SHUTDOWN WITHOUT FURTHER PROBLEMS. MECHANIC FOUND NO CAUSE, DID SOME TROUBLESHOOTING AND AN INSPECTION. FOUND SMALL OIL LEAK FROM PROP SEAL BUT LEAK WAS WITHIN NORMAL LIMITS. GROUND RUN ENGINE WITHOUT DUPLICATING THE INDICATION PROBLEM, SO THEY RELEASED IT TO SERVICE.