As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ASTU WAS ON DEFERRAL. REMOVED AND REPLACED ASTU PRIOR TO DEPARTURE OUT OF PANC IAW AMM 22-14-01. AFFECTED BOTH AUTOPILOT A AND B SYSTEMS AND COULD NOT ENGAGE BOTH AUTOPILOT IN FLIGHT. RETURNED TO PANC. ASTU OPERATIONAL CHECK ACCOMPLISHED ON GROUND AND FAILED IAW AMM 22-14-01. REPLACED WITH PREVIOUSLY REMOVED ASTU. DEFERRAL REMAINS OPEN. RERACKED AUTOPILOT MONITOR AND LOGIC UNIT. OPERATIONAL CHECK NORMAL ON GROUND IAW AMM 22-11-07.