As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FLT 631 - DURING APPROACH TO MIA WHEN LANDING GEAR EXTENDED, RIGHT MAIN LANDING GEAR RED UNSAFE LIGHT REMAINED ILLUMINATED. ACCOMPLISHED MANUAL GEAR EXTENSION AND VISUALLY CONFIRMED RIGHT MAIN LANDING GEAR EXTENDED. AIRCRAFT LANDED MIA WITHOUT INCIDENT. REPLACED LANDING GEAR ACCESSORY UNIT. ACCOMPLISHED LANDING GEAR RETRACTION CHECK WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED NORMAL. (M)