As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION IN AMBER RANGE FOR THE NR 1 ENGINE DURING CLIMBING OUT. REDUCED THRUST & COMPLIED WITH QRH TO KEEP ENGINE PARAMETERS IN LIMITS. FOLLOWED ETN-EJ-72-004 FOUND TWO FAN BLADES STICKING AT POS 20 AND 21. EXERCISED BLADES WHICH ARE FREE AT THIS TIME. PERFORMED GROUND RUN. NO ABNORMAL FAULT NOTED.