What was found
PILOT REPORTED RIGHT ENGINE ROUGH AND VIBRATION IN FLIGHT. UPON INSPECTION MX DISCOVERED THE NR 4 EXHAUST VALVE TO BE BROKEN.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PILOT REPORTED RIGHT ENGINE ROUGH AND VIBRATION IN FLIGHT. UPON INSPECTION MX DISCOVERED THE NR 4 EXHAUST VALVE TO BE BROKEN.