What was found
DEFECT 734071: ENGINE #2 VIBE WENT TO 4.0 AT FL 237 PERFORMED QRH INCREASED THRUST SLIGHTLY TO CONTINUE CLUIMB AND VIBE WENT TO 4.2 MC JP 311181 - - RESOLUTION: RR'D AVM SIGNAL CONDITIONER IAW AMM77-31-03.PERFORMED TEST 14A FAN TRIM BALANCE. SOULTION REMOVED SPINNER BALANCE SCREWS #3 POSITION REMOVED P14, INSTALLED P11, #4 REMOVE P14, INSTALLED P11, #8 REMOVED P14, INSTALLED P09 #35 REMOVED P14 ISTLLED P09. VIB NO GREATER THAN 1.4.