What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED INTO SFO DUE TO THE FLIGHT CREW REPORTING ENGINE 2 HIGH VIBRATION ECAM. ECAM CAUTION ILLUMINATED AND DISAPPEARED TWICE IN A ROW AND THEN A FEW MINUTES LATER REAPPEARED AND DISAPPEARED. N1 VIBRATION WAS SEEN FROM 0.1 TO 5.7, MOVING QUICKLY UP AND DOWN. N2 WAS SEEN UP TO 2.8. THERE WAS NO ICING AND NO NOTICEABLE AIRFRAME VIBRATION - THE FLIGHT CREW ALSO REPORTED THAT DURING DESCENT MULTIPLE ENG VIBRATION ECAMS (AT LEAST 30 CAUTIONS). HIGH N1 AND N2 VIBRATION INDICATIONS UP TO 9.9. NOT IN ICING CONDITIONS AND NO UNUSUAL AIRCRAFT ACTUAL VIBRATIONS FELT. APPROACH AND LANDING WERE NORMAL - THE AIRCRAFT LANDED SAFELY AT SFO AND TAXIED TO THE GATE UNDER ITS OWN POWER - MAINTENANCE REPLACED THE ENGINE 2 VIBRATION TRANSDUCER *AALA202608313775* AND THE ENGINE 2 VIBRATION HARNESS *AALA202608319467* - A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ISSUES NOTED