As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN FLIGHT, RH ENGINE SUFFERED PARTIAL OIL PRESSURE LOSS. PRECAUTIONARY LANDING MADE AT KOXB. TROUBLESHOT LOSS OF OIL PRESSURE, DETERMINED TO BE AN INTERNAL ENGINE ISSUE. REMOVED ENGINE FROM SERVICE AND SENT TO COLUMBIA AIRCRAFT SERVICES INC. FOR INSPECTION/REPAIR. CAUSE DETERMINED TO BE A CATASTROPHIC FAILURE OF THE MAGNETO IMPULSE COUPLING IN WHICH FOD DAMAGED THE OIL PUMP ASSEMBLY. NOTE: DURING A 500HR MAGNETO SERVICE/IMPULSE COUPLING INSPECTION; NO DEFECTS WERE NOTED AT 1083.7 HOURS MAGNETO TT. 4330