What was found
AFTER OVERHAUL OF RIGHT MAIN LANDING GEAR ACTUATOR AND DURING NORMAL GEAR EXTENSION THE RIGHT MLG DID NOT INDICATE LOCKED. AFTER CYCLING GEAR 3 TIME IT INDICATED LOCKED AND A NORMAL LANDING WAS MADE. THE ACTUATOR WAS REMOVED AND SENT BACK TO THE OVERHAUL FACILITY FOR INSPECTION AND REPAIR.THIS IS A RECURRING PROBLEM , IT IS RECOMMENDED THAT 500 HOUR I.R.A.N. BE MADE A SERVICE ITEM. FOR CONTINUED AIRWORTHINESS. THIS MALFUNCTION IS BELIEVED TO BE RELATED TO HYDRAULIC FLUID LINK INTERNALLY COMPOUNDED WITH COLD TEMPERATURES AND ALTITUDED.