As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TECH SERVICE REQUEST. FOLLOW UP TO CONTINUING REPORTS OF #2 ENGINE HIGH ENGINE VIBRATION IN FLIGHT/TRIM RUNS. GROUNDED - YES. PER TECH SERVICE TROUBLE SHOOTING FOUND #2 ENG FAN BLADES BAD, 32 ENG FAN BLADES REPLACED ON ASA WO 1020579-4000-0005 CN OK312443.