What was found
DURING CLIMB, CREW NOTED THE NR 1 ENGINE INDICATED EXCESSIVE VIBRATION. SECURED THE NR 1 ENGINE AND RETURNED TO AIRPORT. INITIAL INSPECTION FOUND THE OVERSPEED PICKUP RING HAD FAILED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING CLIMB, CREW NOTED THE NR 1 ENGINE INDICATED EXCESSIVE VIBRATION. SECURED THE NR 1 ENGINE AND RETURNED TO AIRPORT. INITIAL INSPECTION FOUND THE OVERSPEED PICKUP RING HAD FAILED.