What was found
WHILE IN HEADING MODE, AUTOPILOT WENT INTO A 30 DEGREE RIGHT TURN, UN-COMMANDED. ALSO, THE DISCONNECT BUTTON HAD NO EFFECT (IT WOULD NOT DISCONNECT). IT WAS NECESSARY TO SHUT OFF POWER TO APPROACH TO DISCONNECT CONTROL LOAD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE IN HEADING MODE, AUTOPILOT WENT INTO A 30 DEGREE RIGHT TURN, UN-COMMANDED. ALSO, THE DISCONNECT BUTTON HAD NO EFFECT (IT WOULD NOT DISCONNECT). IT WAS NECESSARY TO SHUT OFF POWER TO APPROACH TO DISCONNECT CONTROL LOAD.