What was found
WHILE ACCOMP T/C 78472002 FAN LUBRICATION NR 1 ENG S/N 894549 FOUND 4 EACH FAN BLADES WITH CONCAVE WEAR AT AFT END OF BLADE FROM SHIM CONTACT BLADE 9, 14, 20, 24. GROUNDED - YES. PER PAR K OF AMM SUBTASK 72-21-02-200-001-F00 MEASURED ABOVE BLADES USING REPORUBBER & STARLIGHT MEASURING SCOPE. 9 = 0.0065, 14 = 0.0065, 20 = 0.0070, 24 = 0.0063. REPLACED DEFECTIVE NR 1 ENGINE FAN BLADES & ASSOCIATED PAIRS. REINSTALLED BLADES MAPPED IAW BLAMAP 856A3770 V3 REFERENCE AMM 72-21-02-000-802-F00 & IN PROGRESS FAN LUBE TASK CARD 78472002 UNDER W/O 414082. PN & SN CHANGES RECORDED ON FIG 400 OF SUBJECT TASK CARD.