As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GRR - FL 400 - CREW REPORTED, THAT THE LEFT MAIN LANDING GEAR GREEN LIGHT DID NOT ILLUMINATE ON GEAR EXTENSION. CREW PERFORMED A TOWER FLY-BY AND DECLARED AN EMERGENCY. FLIGHT LANDED WITH NO FURTHER INCIDENT. MAINTENANCE REPLACED A BURNED OUT LIGHT BULB. (M)