What was found
CYLINDER BASE STUDS ON NR 8 CYLINDER SHEARED OFF, ALLOWING CYLINDER TO PULL OFF OF CYLINDER BASE SPIGOT. WHEN THE CYLINDER GOT FAR ENOUGH OFF THE SPIGOT, THE BOTTOM RING SNAGGED THE BOTTOM OF THE CYLINDER, BREAKING THE RING AND PISTON. THIS LET THE OIL ESCAPE, AND THE ENGINE LOST OIL PRESSURE. THE CREW FEATHERED THE RIGHT PROP ON APPROACH.