As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) RT MAIN LANDING GEAR LIGHT AND WARNING HORN OPERATED DURING TAXI. INVESTIGATION OF THE WARNING SYSTEM COULD FIND NO DEFINITE CAUSEFOR THE DEFECT. PROXIMITY SENSOR WAS ON THE HIGH SIDE OF LIMITS AND WAS ADJUSTED TO THE LOWER LIMIT.