As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE RT MLG GREEN INDICATION LIGHT DID NOT ILLUMINATE WHEN GEAR WAS EXTENDED ON APPROACH. THE ALTERNATE GEAR EXTENSION HANDLE WAS PULLED, BUT THE LIGHT DID NOT COME ON. THE AIRCRAFT LANDED AT BWI WITHOUT INCIDENT. THE RT MAIN GEAR GREEN INDICATION LIGHTS WOULD NOT TEST. THE GREEN INDICATION LIGHTS WERE RELAMPED AND OPERATION CHECKED GOOD.