As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 533 - TEN MINUTES AFTER TAKEOFF ALL THREE GEAR RED LIGHTS ILLUMINATED. LIGHTS STAYED ON THROUGH OUT FLIGHT. NO UNUSUAL NOISES OR BUFFETING. LANDED DFW WITHOUT INCIDENT. REPLACED PROXIMITY SWITCH. SYSTEM GROUND CHECK NORMAL OPERATION. (M)