What was found
(CAN) FORCED LANDING AFTER ENGINE FAILURES. MAJOR DAMAGE TO AIRCRAFT RIGHT WING, PROPELLER, RIGHT SIDE FUSELAGE, NOSE LANDING GEAR. LIMITED DAMAGE LEFT WING. ACFT REMAINED UPRIGHT, STRUCK TREES. WHEN REMOVING BATTERY TO SECURE ACFT IT WAS OBSERVED THAT THE ENGINE CRANKCASE IS BROKEN/SPLIT BETWEEN CYLINDERS 2 AND 4 AND THAT THE PROPELLER ROTATES FREELY THROUGH A LIMITED ARC (ABOUT 80° LEST). CRANKSHAFT FAILURE SUSPECTED.