As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT VIBRATION FELT IN YOKE AND LOUD NOISE HEARD IN REAR OF A/C. WHEN LT THROTTLE RETARDED NOISE AND VIBRATION DECREASED. CA BOROSCOPED NO.1 ENG S/N 726047 FOUND 3 1ST STAGE FAN BLADES BENT FWD. REPLACED NO.1 ENG C-1FAN PER TRANS 9T133