As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) OIL PRESSURE FLUCTUATIONS EXPERIENCED, POWER WAS REDUCED BUT OIL WARNING CAME ON. CORRECTIVE ACTION WAS TAKEN TO SHUT ENGINE DOWN. OIL QUANTITY DOWN 4 QUARTS. REPORT TO FOLLOW. OIL LOSS WAS DUE TO BREATHER VALVE LEAK AND VIBRATIONS WERE EXPERIENCED DUE TO OUT OF BALANCE RING GEAR AND EXCESIVE WEAR BETWEEN THE PINION GEAR AND THE SNAP RING. (X)