What was found
DURING CLIMB AFTER DEPARTURE NOTICED NR 1 ENGINE VIBRATION AT 1.9. DURING CRUISE VIBRATION WAS OBSERVED 1.4-1.6. DURING ACCELERATION VIBRATION INDICATED 2.1 AT FLIGHT IDLE VIBRATION MATCHED NR 2 ENGINE AT .3. GROUNDED-YES. DURING DISASSEMBLY ALL SPACERS WERE DIFFICULT TO REMOVE, INSTALLED ALL NEW SPACERS P/N 340-001-262-0. NO DAMAGE TO SHIMS OBSERVED. INSTALLED ALL NEW SHIMS P/N 340-252-307-0. NO DISCREPANCIES OBSERVED ON -817 PLATFORMS, CLEANED, RELUBED, AND RE-INSTALLED. NO OTHER DEFECTS OBSERVED. WHILE ATTEMPTING TO INSTALL LOCK RING FOUND NEW SHIM WEDGED BEHIND SPACER. REMOVED NR 8 BLADE, INSTALLED NEW SHIM, RELUBED AND INSTALLED NR 8 BLADE, SHIM, SPACER AND PLATFORMS. FOUND 1ST NEW SHIM TO BE DEFECTIVE FROM STOCK. ACCOMPLISHED TASK CARD 78472010 FAN BLADE LUBRICATION. ACCOMPLISHED TEST 7 VIB SURVEY, REF B737-900 AMM 71-00-00-700-814. VIB LEVELS WERE NOT ABOVE .5, WITHIN LIMITS.