As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 CYLINDER'S CONNECTING ROD END CAP SEPARATED FROM CONNECTING ROD. INSPECTION OF ENGINE REVEALED THAT 1 OF THE 2 ATTACHMENT NUTS THAT SECURES END CAP TO CONNECTING ROD CRACKED INTO 4 PIECES ALLOWING END CAP TO STOP SECURING CONNECTING ROD TO CRANKSHAFT. CONNECTING ROD WAS FOUND INTACT. END CAP WAS FOUND IN 3 SEPARATE SECTIONS WITH 2 OF THE SECTIONS RETAINING LOWER HALVES OF ATTACHMENT BOLTS.