What was found
RIC - FLT 4177 - ON APPROACH AFTER SELECTING GEAR 'DOWN' CREW REPORTED NO GEAR DOWN AND LOCKED INDICATION FOR THE LEFT MLG. CREW CONDUCTED A TOWER FLY-BY TO CONFIRM GEAR DOWN. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. ONCE ON THE GROUND, OUT-STATION MAINTENANCE REPLACED BULBS IN THE LANDING GEAR POSITION INDICATOR IAW MM 32-00-00. GROUND CHECKED GOOD, AIRCRAFT RETURNED TO SERVICE.