As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, THE RIGHT MAIN LANDING GEAR DOOR OPEN LIGHT ILLUMINATED AFTER LANDING GEAR EXTENSION. PERFORMED COCKPIT OPERATING MANUAL PROCEDURES AND PERFORMED EMERGENCY LANDING GEAR EXTENSION. AIRCRAFT LANDED WITHOUT INCIDENT. REPLACED THE RIGHT MAIN LANDING GEAR DOOR POSITION SWITCH AND OPERATIONAL CHECK GOOD.