What was found
ON APPROACH, THE LT MAIN GEAR LIGHT DID NOT ILLUMINATED WITH GEAR HANDLE SELECTED DOWN. CREW FOLLOWED CHECKLIST TO BLOW THE GEAR DOWN. LIGHT STILL DID NOT ILLUMINATE. ACFT DIVERTED, PERFORMED TOWER FLY BY, THE TOWER CONFIRMED GEAR WAS DOWN. ACFT LANDED UNEVENTFULLY. MX TROUBLESHOT THE DISCREPANCY TO A FAULTY LAMP IN THE LT MAIN GEAR DOWN AND LOCKED INDICATOR. INDICATOR BULBS WERE REPLACED, EMERGENCY GEAR BOTTLE WAS RESET AND SERVICED, HYD SYS BLED AND SEVERAL SUCCESSFUL GEAR SWINGS WERE PERFORMED. ACFT WAS RETURNED TO SERVICE.