What was found
TRANSISITIONING FROM TAKE-OFF TO CLIMB PHASE OF FLIGHT, AFTER REDUCING POWER NR 1 ENGINE SHUTDOWN. PILOT FEATHERED PROP AND MADE UNEVENTFUL LANDING. REMOVAL OF NR 5 CYLINDER REVEALED SEVERE DAMAGE TO THE TOP OF THE PISTON, WITH BROKEN RINGS. VALVE WERE REALITIVELY INTACT. FURTHER INSPECTION REVEALED DAMAGE TO ALL PISTONS, THOUGH NOT AS SEVERE.