As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OIL LEAK TRACED TO BROKEN ROCKER BOSS AND ROCKER COVER. EXHAUST PUSH ROD BROKEN AND BENT. ENGINE MAY HAVE BEEN STARTED WITH STUCK EXHAUST VALVE SOME TIME IN PAST AND BENT PUSH ROD. PUSH ROD AND TUBE SHOWED SIGNS OF LONG TERM WEAR PRIOR TO BREAKING.