As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LANDING WHEN THE LANDING GEAR HANDLE WAS SELECTED TO THE DOWN POSITION, ONLY THE LEFT AND RIGHT MLG GREEN ANNUNCIATORS ILLUMINATED. NLG GREEN ANNUNCIATOR DID NOT ILLUMINATE. ANNUNCIATOR BULB TEST WAS GOOD. FOLLOWED CHECKLIST AND MANUALLY LOWERED THE LANDING GEARS. LANDING WAS UNEVENTFUL. AIRCRAFT WAS TOWED TO THE RAMP. MAINTENANCE REPLACED A FAULTY NLG DOWNLOCK SWITCH. GEAR SWINGS PERFORMED, OPERATIONAL CHECKS WERE GOOD. AIRCRAFT WAS RETURNED TO SERVICE.