What was found
FLT#615, JFK-SFO. (ETOPS) "DUE TO ENG 1 REPEAT ( AIRCRAFT TECHNICAL RESTRICTION (CONUS RESTRICTION) ) WO 1489064 ASSIGNED. REF LOG PAGE 4003509 ITEM #1 (ECAM MESSAGE ENG 1 HIGH VIBRATION WAS PRESERVED THREE TIMES DURING FLIGHT.ALL OCCURRENCES WORK AT CLIMB POWERSETTING AT FL100,FL290,AND FL310.HIGHEST N2 VIBRATION NOTED WAS 7.2 ON ITS.THE WAS NO ABNORMAL N1 VIBRATION .THIS MAGNITUDE OF VIBRATION IS SUFFICIENT TO PERFORM HIG ENG VIBPROCEDURE,HOWEVER VIBRATIONS RESOLVED INDEDENDENTLY ON EACH OCCASION WITH THE LONGEST EVENT LASTING APPROXIMATELY 15-20 SECOND.) HIGH VIBRATION RECORDED ON ENG #1" ; NO VIBES RECORED IN THE PAST 20 FLIGHT LETS.