What was found
(CAN) PILOT REPORTED LOUD BANG & SUBSEQUENT ENG FAILURE. AUTO-ROTATED TO OPEN FIELD WITH NO DAMAGE TO THE AIRFRAME DURING THE LANDING. ACFT WAS REMOVED FROM THE FIELD & TRANSPORTED FOR FURTHER INVESTIGATION. ACFT PANELS WE REMOVED & A LARGE HOLE IN THE CRANKCASE WAS OBSERVED BY THE NR 3 CYLINDER INTAKE LIFTER BORE. LARGE PIECES OF CRANKCASE DEBRIS WERE FOUND LYING ON TOP OF THE ENG CASE ABOVE THE NR 2 CYLINDER AREA. MFG HAS BEEN ADVISED & A FIELD SERVICE REP IS COMING TO INVESTIGATE THE FAILURE AT OUR LOCATION.