What was found
DFW - FLT 0899 - DURING APPROACH AFTER GEAR EXTENSION, ONLY THREE RED LIGHTS ILLUMINATED. ACCOMPLISHED EMERGENCY EXTENSION CHECKLIST, GAVE THREE GREEN LIGHTS AND GEAR DOOR LIGHT EXTINGUISHED WHEN HANDLE WAS STOWED. LANDED DFW WITHOUT FURTHER INCIDENT. LUBRICATED GEAR HANDLE AND ACCOMPLISHED GEAR SWING. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)