As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 2287 - ON APPROACH INTO ORD, WITH THE LANDING GEAR LOWERED, ALL THREE GEAR GREEN LIGHTS WERE ILLUMINATED. SUDDENLY, THE RIGHT MAIN LANIDNG GEAR RED LIGHT ILLUMINATED. CAPTAIN ACCOMPLISHED CHECKLIST AND DECLARED AN EMERGENCY. AS A PRECAUTION, CAPTAIN REQUESTED THE EMERGENCY EQUIPMENT BE CALLED OUT. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE ADJUSTED THE RIGHT MLG DOWNLOCK SENSOR PER MM 32-61-31. OPERATIONAL CHECK GOOD. (M)