What was found
CYLINDER ASSY HAD EXTREME CLEARANCES BETWEEN VALVES AND VALVE GUIDES WHICH IS NOT INDICATIVE OF 307.0 HOURS OF OPERATION ON A CYLINDER. UTILIZING USAF SPECS, I.E., SODIUM FILLED DOME TYPE EXHAUST VALVES AND CLOSE TOLERANCE STEEL VALVE GUIDES. ALSO, EXCESSIVE PISTON TO CYLINDER BARREL SCUFFING. THIS CYLINDER ASSY SHOWS EVIDENCE OF 1,000 HOURS OF OPERATION USAGE.