What was found
CAPTAIN REPORTED THAT DURING FLIGHT WITH EPR BETWEEN 1.0 AND 1.2 IN THE LT ENGINE; VIBRATION AMPLITUDE OCCASIONALLY WITH PEAKS FROM 4 TO 0 AND WHEN THE LT ENGINE WAS SHUTDOWN, VIBRATION WAS FELT IN ALL THE AIRCRAFT. THE LT ENGINE CHIP DETECTORS, ACCESSORIES, PNEUMATIC LINES, VIBRATION ABSORBERS WERE INSPECTED, BEING CORRECT. THE LT ENGINE BOROSCOPE INSPECTION WAS PERFORMED AND NO DAMAGES WERE FOUND. DURING THE ENGINE TEST WAS DETECTED THE VIBRATION AT 1.17 OF EPR. THE LT ENGINE WAS REPLACED AND TESTED IAW MM 71-00-02, ALL CORRECT.