As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH AT ABOUT 1500 AGL "APPROACH MODE" AUTOPILOT "B" ENGAGED AUTOPILOT B DISENGAGED ITSELF. DID NOT TRY TO RE-ENGAGE AUTOPILOT. ACCOMPLISHED FIM 22 11 TASK 801. LOC BEAM ANOMOLY DET FAULT LOGGED ON LEG 1. LAND VERIFY TEST PASSED. GROUND VERIFICATION SUCCESSFUL.