What was found
#1 ENGINE TREND DATA SHOWS A RISE IN LOW PRESSURE ROTOR VIBRATION LEVELS. TASK CARD 78472010. GROUNDED - YES. WHILE ACCOMPLISHING T/C CFM 56-7 FAN BLADE LUBE FOUND NO IRREGULARITIES IN THE FAN. FOUND EXCESSIVE LUBE, FOUND MULTIPLE DAMAGED PLATFORMS, FOUND MULTIPLE WORN SHIMS. ACCOMPLISHED T/C CFM 56-7 FAN BLADE LUBE THROUGH PG 19 SUBTASK 839-050 (2).INSPECTED FAN DISK MID LUG AND BOOSTER SPOOL FORWARD FLANGE LUG THREADED PINS FOR DAMAGE, NO DAMAGE NOTED. ALL 24 PLATFORMS & SHIMS WERE REPLACED IAW AMM CFM 56-7 FAN BLADE LUBE. COMPLETED #1 ENG FAN BLADE LUBE & INSTALLATION.ACCOMPLISHED VIBE SURVEY TEST 7 & ON BOARD FAN TRIM BALANCE TEST 14B REF AMM 71-00-00 VIBE LEVELS ARE WITHIN LIMITS.