What was found
LEFT ENGINE REACHED 4.1 UNITS OF VIBRATION, CAPTAIN REPORTED THAT DURING CLIMB, THE LEFT ENGINE REACHED 4.1 UNITS OF VIBRATION; SO FLIGHT CREW ACCOMPLISHED THE QRH 7.26 PROCEDURE AND THE VIBRATION WAS STABILIZED IN 3.5 UNITS. MAINTENANCE PERSONNEL PERFORMED A LEFT ENGINE VIBRATION, VIBRATION HIGH SYSTEM CHECK IAW FIM 71-05 TASK 808 PROCEDURE, NO DAMAGES WERE FOUND; SO TRIM BALANCE WAS PERFORMED IAW AMM 71-00-00 TASK 71-00-00-750-803 WITH 0.4 UNITS AND 96% N2 AND TEST NUMBER 7 VIBRATION SURVEY WAS PERFORMED IAW AMM 72-00-00, TESTED CORRECT.