What was found
WITH SPEED SLOWLY ACCELERATING PAST 265 KIAS AND IN CLIMB THROUGH FL235, A DEFINITE RUMBLING VIBRATION WAS FELT IN THE ACFT. NO SIGNIFICANT VIBRATION IN YOKE, BUT COULD CLEARLY SEE THE LT AILERON VIBRATING UP AND DOWN .2500". IMMEDIATELY SLOWED DOWN AND THE VIBRATION WENT AWAY. DIVERTED TO GET ACFT ON GROUND. INSPECTING AILERON, FOUND TRIM TAB PUSHROD BOLTS WORN. R & R TRIM TAB BOLTS IAW MM 27-10-01. LUBRICATED TRIM TAB ACTUATOR IAW MM 27-11-01. OPS CHECKED GOOD. ALSO FOUND ELEVATOR TRIM TAB BOLTS AND BEARINGS WORN. R & R THE ELEVATOR TRIM TAB BEARINGS AND BOLTS IAW MM 20-10-08. NO FURTHER DEFECTS NOTED.