As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, THE RED LANDING GEAR LIGHT ILLUMINATED WITH LANDING GEAR DOWN. RECEIVED A GPWS WARNING AT 500 FEET. AIRCRAFT EXECUTED A GO-AROUND. RECYCLED THE LANDING GEAR AND ALL INDICATIONS WERE NORMAL. REPLACED AURAL WARNING SYSTEM CIRCUIT CARDS A3, A6 & A11. OPERATIONAL CHECK GOOD.