What was found
LEFT ENGINE VIBRATION FAN 5.0 ON CLIMB, UP TO FL 320 ,VIBRATION 1.8 .4 FOR CRUISE AND DESCENT FOR CRUISE AND DESCENT. PEREFORMED INSPECTION CHECK OF LEFT ENGINE INLET & EXHAUST, MASTER MAG CHIP, AVM SENSORS AND ENGINE INSIDE, AVM TEST OK, AND NO FAULT HISTORY IAW FIM 71-05 FT 856 AND AMM 77-31-00, 201.