What was found
AIRCRAFT RETURNED DURING CLIMB, THE RIGHT ENGINE REACHED 4.0 UNITS OF VIBRATION; SO FLIGHT CREW ACCOMPLISHED THE QRH 7.24 PROCEDURE, CONFIRMING THE FAILURE. AIRCRAFT WAS SENT TO THE HANGAR AND MAINTENANCE PERSONNEL PERFORMED A RIGHT ENGINE VIBRATION, VIBRATION HIGH SYSTEM CHECK IAW FIM 71-05 TASK 808 PROCEDURE, NO DAMAGES WERE FOUND; TRIM BALANCE WAS PERFORMED IAW AMM 71-00-00 TASK 71-00-00-750-803 CONTINUING THE FAILURE; SO THE RIGHT ENGINE FAN BLADE COMPLETE SET WERE REPLACED IAW AMM 72-21-02-900-801-F00 AND TEST NUMBER 7 VIBRATION SURVEY WAS PERFORMED IAW AMM 72-00-00, TESTED CORRECT. THE OVERWEIGHT INSPECTION WAS NOT NECESSARY DUE TO THE AIRCRAFT LANDED WITH 65,475 KILOGRAMS AND THE MAXIMUM ALLOWABLE LANDING WEIGHT IS 66,360 KILOGRAMS.