What was found
DIVERSION, ON CLIMB AT 12000' HEARD A POP/BANG NOISE ACCOMPANIED BY LOUD WHIRRING NOISE. MAXIMUM VIBRATION ON NR 1 ENGINE. REMOVED AND REPLACED NR 1 ENGINE PER MT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DIVERSION, ON CLIMB AT 12000' HEARD A POP/BANG NOISE ACCOMPANIED BY LOUD WHIRRING NOISE. MAXIMUM VIBRATION ON NR 1 ENGINE. REMOVED AND REPLACED NR 1 ENGINE PER MT.