What was found
DURING CRUISE FLIGHT, THE LT RADIAL ENGINE NR 2 CYLINDER SUFFERED A CATASTROPHIC FAILURE. BOTH FRONT AND REAR OIL SUMP CHIP DETECTOR WARNING LIGHTS ILLUMINATED SIMULTANEOUSLY AND THE ENGINE EXPERIENCED SUDDEN STOPPAGE. THE CREW COMPLETED THE EMERGENCY SHUTDOWN CHECKLIST, FEATHERED THE PROPELLER, AND DECLARED AN IN-FLIGHT EMERGENCY. LANDING WAS UNEVENTFUL. UPON INITIAL INSPECTION, THE NR 2 CYLINDER WAS FOUND TO HAVE SEPARATED FROM ITS SEAT AND THE PISTON WAS FOUND TO HAVE EXITED THE CYLINDER TO THE RIGHT. ALL ENGINE COMPONENTS REMAINED WITH THE ACFT. COMPLETE ENGINE TEARDOWN IS REQUIRED.