What was found
ON CLIMBOUT NEITHER AUTOPILOT A OR B WOULD STAY ENGAGED. AFTER SEVERAL SECONDS OF BEING ENGAGED THE AUTOPILOT WOULD DISENGAGE WITH AN ABRUPT TURN TO THE RIGHT. ACFT GROUNDED. FOUND BAD AILERON POSITION SENSOR. REPLACED SAME REF MM 22-11-29-000-801 & -400-801. FAILED AILERON POSITION SENSOR ADJ REF MM 22-11-29-820-801, STEP 2.D., 1, 13. ADJ 'B' A/P AILERON ACTUATOR ROD LENGTH REF MM 22-11-25-820-801. OPS NORMAL. COMPLETED AILERON POSITION SENSOR TEST WITH NO FAULTS. REF MM 22-11-29-820-801 & 22-11-29-710-801. ALSO TESTED AILERON A/P ACTUATOR REF MM 22-11-25 / 401& 22-11-25/501. ALL OPS NORMAL. ACFT CAT IIIA AUTOLAND AND HGS QUALIFIED. STATUS SCREW NOW REFLECTS THIS.