What was found
DURING APPROACH TO KTOL, THE LEFT GEAR LIGHT DID NOT ILLUMINATE. THE CREW CYCLED THE GEAR AND THE LIGHT STILL DID NOT ILLUMINATE. AFTER APPROXIMATELY 2 MINUTES THE LIGHT ILLUMINATED. THE CREW LANDED THE AIRCRAFT WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT THE SYSTEM AND FOUND THE GEAR WARNING LIGHT BULBS BAD AND DEBRIS ON THE LEFT GEAR DOOR WARNING SWITCH. MAINTENANCE REPLACED THE LIGHT BULBS AND ALSO CLEANED THE GEAR WARNING SWITCH. THE OPERATIONAL CHECK WAS SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.