As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TRANSIENT PILOT LANDED WITH LOSS OF OIL PRESSURE. OIL WAS OVER AIRCRAFT BELLY AND ENGINE COMPARTMENT. INVESTIGATION FOUND RIGHT MAGNETO HANGING BY DISTRIBUTOR WIRES AND LEFT MAGNETO VERY LOOSE. AIRCRAFT ANNUAL APPROXIMATELY 20 HOURS PRIOR. CONCLUSION: MAGNETOS MAY NOT HAVE BEEN RETIGHTENED DURING ANNUAL-IF THEY WERE RETIMED.