As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN REPORTED THAT DURING CRUISE, BOTH ENGS VIBRATION REACHED 3.2 & 3.6 UNITS. ACFT WAS SENT TO THE HANGAR & MX PERFORMED LUBRICATION OF THE FAN ROTOR BLADE OF THE RT ENG IAW AMM 72-21-00 & FAN TRIM BALANCE TEST 14B IAW AMM 71-00-00, BEING WITHIN LIMITS.