What was found
ON CLIMB OUT FROM PIT, CREW REPORTED THE LEFT MAIN LANDING GEAR RED AND GREEN LIGHTS ILLUMINATED WHEN THE GEAR WAS RETRACTED. CREW CYCLED GEAR WITH SAME RESULTS. WHEN GEAR WAS EXTENDED, INDICATIONS IS NORMAL. FLIGHT RETURNED TO FIELD AT PIT AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED LOGIC CARDS M986 AND M988 AND LUBRICATED THE LANDING GEAR ASSEMBLY. PERFORMED OPERATIONAL CHECK OF MAIN LANDING GEAR IN ASSOCIATION WITH MM WITH HYDRAULIC MULE AND AIRCRAFT HYDRAULIC SYSTEM. OPERATIONAL CHECK NORMAL ON GROUND.