What was found
NR 2 ENGINE TREND DATA SHOWS VIBRATION LEVELS FROM THE LOW PRESSURE ROTOR TO GREATER THAN EXPECTED. DATA SCATTER INDICATES FAN LUBE REQUIRED. PER T/C 7847200 NR 2 ENGINE FAN BLADE SHIMS EXHIBIT MORE THAN 25% MOLYDAG COATING LOSS PER AMM 72-21-02-801 STEP L (1)(B). PER T/C 78472002 NR 2 ENGINE NR 21 PLATFORM HAS ONE SIDE OF ELASTOMER UNBONDED PER AMM 72-21-02-801 STEP (I) (5) NR 1, 19, 23 ARE ALSO UNBONDED. GROUNDED - YES. ACCOMPLISHED FAN BLADE LUBE T/C 78472002 STEPS 1-52. FOUND WORN SHIMS REF L/P 11653023. REPLACED NR 2 ENG FAN BLADE SHIMS. REF T/C 78472002. FOUND MISSING & UNBONDED PLATFORM SEALS REF L/P 11653022. REMOVED & REINSTALLED NEW PLATFORMS NR 21, 1, 19 23 PER T/C 78472002. ACCOMPLISHED NR 2 ENGINE VIBE SURVEY TEST 7, REFERENCE AMM 71-00-00-700-814-F00; 0.8 PEAK VIBE WITHIN ASA LIMIT PER AMM 71-00-00-800-806-F00. COMPLETED TASK CARD 78472002.