As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LANDING, THE LANDING GEAR WARNING HORN SOUNDED AND A RED INDICATION OCCURRED FOR BOTH LEFT AND RIGHT MAIN GEAR. *S/D* THE LANDING GEAR ACCESSORY UNIT FAILED. REPLACED LANDING GEAR ACCESSORY UNIT PER MAINTENANCE MANUAL. RAN ENGINE PER JET RUN UP HANDBOOK. PERFORMED POWER TRANSFERS DURING ENG RUN. LANDING GEAR INDICATION NORMAL.