What was found
AT 410 AUTO PILOT KICKED OFF. ENTERED SLIGHT LT ROLL, HARD TO BRING WINGS LEVEL. EXECUTED CHECKLIST USING PILOT SIDE FOR ROLL CONTROL & DIVERTED. NO PANELS OR DAMAGE TO WING. ALL OTHER CONTROLS NORMAL. AILERON CONTROL MINIMAL UNTIL LOWER ALTITUDE & SLOWER SPEED. NEVER RETURNED TO NORMAL. INSPECTED ALL PCU'S, FOUND HYD FLUID RESIDUE ON PCUS. CLEANED PCUS & PERFORMED LEAK CHECK IAW MM 27-11-25. NO LEAKS NOTED. LOWERED FLAPS. INSPECTED ALL AILERON WING CABLES, NO DEFECTS NOTED. AILERON SYS OPS CKS IAW MM 27-11-00, ALL TRAVELS CK'D GOOD, NO BINDING NOTED, DID NOTICED A GRINDING SOUND EMINATING FROM THE RT AILERON PCU BEARINGS. CP/CN RT AILERON PCU TOGGLE LINK AFT BOLTS & BEARING REPLACED WITH NEW UNITS. VISUAL INSPECTION OF AILERON PULLEYS & PULLEY COVER LOCATED IN LT WHEEL WELL. NO FAULTS NOTED. PERFORMED SEVERAL MORE CYCLES OF AILERON SYS. NO FAULTS NOTED. OPS CHECK GOOD IAW MM 27-11-00.