What was found
DURING AN INSPECTION OF THE ENGINE, THE NR 5 CYLINDER WAS FOUND CRACKED BETWEEN THE TOP SPARK PLUG HOLE AND INJECTOR NOZZLE HOLE. INVESTIGATION REVEALED THE MAGNETO TO ENGINE TIMING WAS 10 DEGREES ADVANCED. AFTER THE NR 5 CYLINDER WAS REMOVED, THE PISTON, PISTON PIN, AND CONNECTING ROD WERE FOUND TO SHOW SIGNS OF EXCESSIVE HEAT. THE NR 2 CYLINDER WAS THEN PULLED AS A PRECAUTIONARY MEASURE AND WHILE THE CYLINDER WAS NOT CRACKED, THE PISTON, PISTON PIN, AND CONNECTING ROD WERE ALL FOUND HEAT-DAMAGED. THE ENGINE WAS THEN REMOVED FROM SERVICE AND THE OVERHAUL FACILITY CONTACTED REGARDING THIS DISCREPANCY. REFERENCE SB M84-8 AND SB M94-8.