What was found
LT GEAR GREEN LIGHT DID NOT COME ON WHEN LANDING GEAR WAS EXTENDED, RED LIGHT REMAINED ON. AFTER CYCLING GEAR AND MISSED APPROACH, GREEN LIGHT CAME ON AND A/C LANDED. LUBRICATED NOSE LANDING GEAR WITH AEROSHELL NR 5, CLEANED CANNON PLUG AT MICRO SWITCH AND ALL LIGHTS INDICATED DOWN AND LOCKED ON GROUND.