What was found
#1 ENG HIGH VIBRATION CAUTION IN AMBER DURING CLIMB IN ICING CONDITIONS. HIGH VIBES CONTINUED 4.0 IN CRUISE AT FL 310. RAN CHECKLIST ABLE TO CLEAR VIBE CAUTION BELOW 50% N1 BUT THAT WAS TOO LOW TO CONTINUE DESTINATION. DIVERTED. REMOVED FROM SERVICE. C/W MCN E770001-01 AND DETERMINED TO BE ABNORMAL VIBRATION - SEE NEXT L/P 1031122 FOR DEFERRAL OF ADDITIONAL MTX REQUIREMENT. (REF DEFECT 1031121) PERFORM E175-72-00-00-QE02 ON #1 ENG WITHIN 50 FLT HOURS (REF QX MCN E770001-01). RETURNED TO SERVICE.