What was found
FEATHERED THE NR 1 ENGINE AT 0345Z DUE TO NR 16 CYLINDER LT & RT LOW COMPRESSION PATTERN. REPLACED THE NR 16 CYLINDER. (EXHAUST VALVE STUCK OPEN).
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FEATHERED THE NR 1 ENGINE AT 0345Z DUE TO NR 16 CYLINDER LT & RT LOW COMPRESSION PATTERN. REPLACED THE NR 16 CYLINDER. (EXHAUST VALVE STUCK OPEN).