What was found
(CAN) AIRCRAFT WAS IN CRUISE, ALL SYSTEMS NORMAL WHEN A VIOLENT VIBRATION HAPPENED IN THE LT ENGINE. ENGINE SEIZED DURING SHUTDOWN/FEATHER PROCESS AND FEATHERING WAS UNAVAILABLE. A SAFE LANDING WAS MADE ON A LAKE. INVESTIGATION REVEALED NR 1 CYLINDER COMPLETELY REMOVED FROM THE ENGINE AND NR 9 PARTIALLY REMOVED. FORWARD COUNTERWEIGHT HAD SEPARATED COMPLETELY FROM ITS ARM AND WAS FOUND LODGED IN THE TOP PART OF THE ENGINE AFTER BLOWING OUT A SECTION OF THE NOSE SIDE OF THE CRANKCASE COVER. AN ENGINE CHANGE WAS CONDUCTED ON SITE AND AIRCRAFT RETURNED TO RED LAKE WITH A LOANER PROP INSTALLED. (TC NR 20070729002)