As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: EMERGENCY DECLARED; AIRCRAFT LANDED WITHOUT INCIDENT - DECISION WAS MADE TO RETURN TO DFW - BOTH AUTO PILOTS FAILED TO ENGAGE. FOUND AUTO PILOT CUTOUT SWITCH IN THE CUTOUT POSITION. PERFORMED TRIM CUTOUT AND STAB TRIM CUTOUT RELAY LRU TESTS, STAB LIMIT SW/MODULE , PRI ELEC ACT-STAB TRIM COL SW MODULE LRU TESTS , ALL CHECKS OK , NO FAULTS NOTED , REF AMM 22-11-00.