What was found
PILOT REPORTED THAT WHILE COMING IN ON FINAL SELECTED THE GEAR DOWN & AFTER THE LG CYCLED, THE LT GEAR FAILED TO ILLUMINATE DOWN & LOCKED, RAN CHECKLIST, FAILED TO RESOLVE SITUATION, CONTACTED DISPATCH & TOWER DECLARED EMERGENCY, PUMPED GEAR DOWN. MAINTENANCE REPLACED THE LT MAIN GEAR ACTUATOR, OPERATIONS & LEAK CHECKED GOOD.