What was found
FLT#387, BOS-LAX. (ETOPS) 'ENG 2 N2 VIBRATION ERRATIC AT POWER SETTINGS AT 89% N1 AND ABOVE ( ECAM IND-LOWER DISPLAY N2 VIBRATION ); PERFORMED HIGH POWER ASSURANCE TEST IAW AMM 71-00-00-710-806-A. PERFORMED POWER ACCELERATION/ DECELERATION TEST IAW AMM 71-00-00-710-805-A TEST #4. BOTH TESTS PASS. A/C OK FOR SVC. REF LP 4163288, ITEM #1 (REMOVED AND REPLACED ENG #2 OIL DAMPER VALVE IAW REF AMM 79-21-07. LEAK CHK OK. MDDR REMAINS OPEN DUE TO OPS CHECK HIGH PWR RUN) FOR REMOVAL AND REPLACEMENT OIL DAMPER. MDDR CLEARED.