As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AT 8000 FEET AND 250 KTS, DESCENDING ON ARRIVAL, THROTTLES IDLE. GEAR WARNING HORN SOUNDED AND ALL THREE RED LIGHTS FOR GEAR NOT DOWN AND LOCKED ILLUMINATED. CANCELLED HORN AND LIGHTS. ACCOMPLISHED FLIGHT DATA RECORDER DOWNLOAD PER WORK CARD # 08L21031001 AND PSEU BITE CHECK PER FIM 32-09-00-810-801. NO EXISTING FAULTS FOUND.