As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON TAKEOFF, NOTICED STEADY DROP IN ENGINE OIL PRESSURE. SHUT ENGINE DOWN AT MIN OIL PRESSURE. PRESSURE STILL DECREASING. CHECKED SCREENS AND OIL PRESSURE VALVE ON GROUND. COULD NOT GET ENGINE TO MAKE MIN ACCEPTABLE PRESSURE. REMOVED ENGINE. UPON REMOVAL OF PROP, BRONZE OR BRASS WAS IN PROP SHAFT. (K)