What was found
LAS - DIVERTED FLIGHT - 2/27/01 - EN ROUTE FROM RNO TO PHX THE AIRCRAFT EXPERIENCED AIRFRAME VIBRATIONS THAT WERE NOTICED IN THE COCKPIT AND AFT GALLEY; THE CREW FELT IT IN THE CONTROL WHEEL AND RUDDER PEDALS. IT INCREASED IN FREQUENCY FROM 230 KTS TO .77 MACH. THE FLIGHT WAS DIVERTED TO LAS. IN LAS A VISUAL INSPECTION WAS PERFORMED ON THE RUDDER, ELEVATORS, TABS, RUDDER PCU ATTACH POINTS, INPUT RODS, STANDBY ACTUATOR AND ATTACH POINTS, AFT FUSELAGE AREA, DOORS, PANELS AND VORTEX GENERATORS; ALL WERE GOOD. REPLACED YAW DAMPER COUPLER AS A PRECAUTION. THE AIRCRAFT WAS REPOSITIONED TO PHX.