What was found
PRECAUTIONARY SHUT DOWN NR 3 ENGINE IN CRUISE DUE TO BACKFIRING AT ALL POWER SETTINGS. REMOVED AND REPLACED THE NR 16 CYLINDER ON THE NR 3 ENGINE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PRECAUTIONARY SHUT DOWN NR 3 ENGINE IN CRUISE DUE TO BACKFIRING AT ALL POWER SETTINGS. REMOVED AND REPLACED THE NR 16 CYLINDER ON THE NR 3 ENGINE.