As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 211 - STL-FWA - ON DESCENT, THE AUTO PILOT DISENGAGED AND ALL INDICATOR TEST LIGHT ILLUMINATED. THE GEAR HANDLE WAS PLACED UP THEN OFF AND THE LIGHTS WENT BACK TO NORMAL. REMOVED AND REPLACED THE LANDING GEAR ACCESSORY UNIT. OPS CHECKED GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE. (M)