As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: CMD A/B AUTO PILOT INOPERATIVE. MULTIPLE ATTEMPTS MADE TO REENGAGE FAILED. DECESION MADE TO RETURN TO PHX. AIRCRAFT LANDED WITHOUT INCIDENT. REF MIC 0144604, MAINTENANCE ADJUSTED AND TESTED ELEVATOR POSITION SENSOR IAW AMM 22-11-30-820-801.