What was found
ON APPROACH, THE LT MAIN GEAR SAFE INDICATOR DID NOT ILLUMINATE WHEN THE LANDING GEAR WAS EXTENDED. CREW FOLLOWED THEIR CHECK LIST, PERFORMED THE EMERGENCY GEAR EXTEND PROCEDURE AND DECLARED AN EMERGENCY. CREW PERFORMED AN INDICATOR ROTARY TEST AND DETERMINED THAT A FAULTY BULB WAS THE CAUSE OF THE INOP INDICATION. ACFT LANDED SAFELY. MX CONFIRMED THAT BOTH THE LIGHT BULBS FOR THE LT MAIN GEAR INDICATOR LIGHT ASSY WERE INOP. LIGHT BULBS WERE REPLACED, EMERGENCY GEAR AND BRAKE SYS WAS SERVICED, GEAR SWINGS WERE PERFORMED AND SYS OPS CHECK NORMAL. ACFT WAS RETURNED TO SERVICE.