What was found
DURING CLIMB, EXPERIENCED A STRONG VIBRATION ALL OVER A/C. A/C RETURNED TO SAL STATION FOR MX. AFTER LANDING AT SAL STATION, TECHS PERFORMED TROUBLESHOOTING IAW TSM 05-50-00. FOUND 3 RUDDER SERVO CONTROLS & HINGE BEARINGS OUT OF LIMITS. THE 3 RUDDER SERVO CONTROLS WERE REPLACED AND TESTED AS PER AS PER AMM 27-24-51. THE NR 3 HINGE BEARING (P/N MS14101-9) WAS REPLACED AND TESTED AS PER AMM 55-36-41. ALL TEST RESULTS ON BOTH, RUDDER AND HINGE BEARING WERE FOUND NORMAL. A FLIGHT TEST WAS PERFORMED. NO VIBRATION WAS FELT ON CLIMB, CRUISE, DESCENT AND BANK STAGES OF THE FIGHT. AIRCRAFT WAS RETURNED TO NORMAL OPERATION. (M)