As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH, GEAR HANDLE SELECTED DOWN, LEFT MAIN GREEN GEAR ANNUNCIATOR LIGHT WOULD NOT ILLUMINATE. BULB TEST GOOD. EMERGENCY DECLARED. FOLLOWED CHECKLIST ABNORMAL PROCEDURES, MANUAL GEAR EXTENSION PERFORMED. LANDING WAS UNEVENTFUL. MAINTENANCE ADJUSTED THE LEFT MAIN LANDING GEAR DOWNLOCK SWITCH OUT OF RIG. RIGGED SAME. SEVERAL GEAR SWINGS PERFORMED AND OPERATIONAL CHECK WAS GOOD. A SUCCESSFUL OPERATIONAL CHECK FLIGHT WAS PERFORMED. AIRCRAFT WAS RETURNED TO SERVICE.