What was found
FT # 1735, BOS-MSP. THE PILOT REPORTS HIGH VIBRATIONS FROM THE #2 ENGINE. THE A/C WAS JUST RETURNED TO SERVICE IN BOS FOR THE R & R OF ONE FAN BLADE ON THE #2 ENGINE THAT HAD A DENT ON IT. THE PILOT ELECTED WITH THE CONCURRENCE OF MCC TO RTF IN BOS. ENG 2 N1 UP TO 9.9 IN CLIMB 7.1 IN CRUISE 1.6-8.2 DESENT ALL OTHER PARAMETERS WERE NORMAL EGT CRUISE 420. #2 ENG FAN BLADES REMOVED FOR RE-PLOT. ANNULUS FILLER AT # 2 ENG # 3 FAN BLADE HAS TORN SEAL; RE-PLOTTED #2 ENG FAN BLADES PER AMM 72-31-11. FAN BLADES RE-INSTALLED UP TO STEP H. OF AMM 72-31-11-400-010-C. R & R ANNULUS FILLER IAW AMM 72-11-400-011-B.