What was found
AFTER THIS CYLINDER WAS INSTALLED, THE ENGINE OIL CONSUMPTION INCREASED. EVEN AFTER A SUFFICIENT BREAK-IN PERIOD, THE CONSUMPTION DID NOT DROP. AFTER APPROXIMATELY 162 HOURS, THE ENGINE RAN EXTREMELY ROUGH EVEN WITHOUT THE MAIN ROTOR ENGAGED. THE SPARK PLUGS WERE REMOVED, AND THE LOWER NR 1 PLUG WAS FOUND COMPLETELY OIL FOULED. THE CYLINDER WAS REPLACED WITH A FACTORY NEW UNIT.