What was found
AFTER LOWERING THE LG ON APPROACH, LT MAIN GEAR DID NOT ILLUMINATE. GO AROUND ACCOMPLISHED WITH GEAR DOWN. LIGHT TEST ACCOMPLISHED & BOTH BULBS WERE INOPERATIVE. REPLACED & CHECKED, LIGHTS INDICATED GEAR DOWN. RELAMPED BOTH LT & RT MLG ANNUNCIATORS IAW MM 33-16-02-2. OPERATIONS CHECKED NORMAL. ACFT OK TO CONTINUE.