What was found
ON FLIGHT 3786 THE CREW REPORTED THE YOKE VERY STIFF TO MOVE FOR ELEVATOR AND AILERON MOVEMENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. PERFORMED AILERON / RUDDER / ELEVATOR OPERATIONAL CHECK, GENERAL VISUAL INSPECTION OF QUADRANTS, AND TENSION CHECKS. ALSO CHECKED PITCH FEEL ALL SYSTEM CHECK GOOD AND NO DEFECTS NOTED. REF NRWC S # 519-ORD-00944 / 519-ORD-00945 / 519-ORD 00946 / 519-ORD-00947. THE AIRCRAFT WAS RETURNED TO SERVICE.