As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ON CLIMB OUT, AUTOPILOT A AND B WOULD NOT ENGAGE. FLIGHT RETURNED TO DFW LANDING SAFELY. REPLACED FLIGHT CONTROL COMPUTER A. REPLACED AILERON POSITION SENSOR M937. ADJUSTED AILERON ACTUATOR INPUT ARM A. ACCOMPLISHED SATISFACTORY OPERATIONAL TESTS PER AMM 22-11-29, AMM 22-11-33M AND AMM 22-11-25.