What was found
DURING CLIMB, THE NR 2 ENGINE LP VIBRATION READ AMBER 4.0. IAW THE ABNORMAL CHECKLIST, DISCONNECTED THE AUTO THROTTLE, REDUCED POWER. LP READING RETURNED TO NORMAL, GREEN READING. OPERATED WITH THE AUTO THROTTLE OFF FOR THE REMAINDER OF THE FLIGHT. THE NR 2 LP VIBRATION REMAINED GREEN BUT READ MUCH HIGHER THAN THE NR 1. REMOVED FROM SERVICE. FOUND MULTIPLE FAN BLADES STUCK. REMOVED STUCK BLADES & CLEANED BLADE TANG. INSTALLED BLADES BACK IN ORIGINAL POSITION WITH NEW. GROUND RAN ENGINES, VIBRATION CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.