What was found
WHEN LANDING, LEFT MAIN GEAR DIDN'T HAVE GREEN LIGHT. PERFORMED EMERGENCY GEAR EXTENSION. FOUND THE LT GEAR DOWN & LOCK LIGHT BULBS INOPERATIVE. REMOVED THE FAILED INDICATOR BULBS & INSTALLED NEW BULBS. JACKED ACFT & CYCLED THE GEAR SEVERAL TIMES WITH NO FAILURES. DOWN JACKED ACFT. OPERATIONAL TESTS CHECKED GOOD IAW MM 32-30. BULB REMOVED & INSTALLED . VERIFIED THAT THE LANDING GEAR SHUTTLE VALVES WERE RESET AFTER THE GEAR BLOW DOWN.