What was found
FLT#2924, LAX-JFK. (ETOPS) ENG 1 VIBS AMBER XX INTERMITANT ( ECAM IND-LOWER DISPLAY N2 VIBRATION )2+53 INTO FLT, RCV'D ENG 1 HIGH VIBRATION ECAM,WHILE RUNNING THE QRH,CROSSCHECK OF BOTH ENGINE PARAMETERS & A CFDS INTERROGATION, APPEARS THE FLANG VIB SNSR HAS FAILED. N2 FAILED ONCE(WITH AMBER X'S) & RESET ITSELF. BASED ON QRH GUIDANCE , ELECTED TO NOT RETARD THE #1 TL. SATCOM CALL TO MCC TO CONFIRM PROCEDURES/ SUSPICIONS ON SENSOR FAIL & DECISION TO CONTINUE TO DESTINATION. VIBRATIONS WENT FROM .1 TO 12.0 DURATION OF EVALUATION ABOUT 12 MINS; PERFORMED REMOVAL & INSTALLATION OF FORWARD VIBRATION SENSOR 4068KS PER AMM 77-32-21. OPERATIONAL CHECK GOOD, NO FAULTS APPEAR ON ECAM. AIRCRAFT SYSTEM RESPONDS NORMAL