What was found
AT APPROXIMATELY 20:00 HRS ON APPROACH INTO KTN SEVERAL GEAR CYCLES REQUIRED TO EXTEND RIGHT MAIN LANDING GEAR. ONCE THE GEAR WAS DOWN AND LOCKED THE CREW LANDED WITHOUT FURTHER PROBLEMS. MAINTENANCE FOUND WATER IN THE ACTUATOR SWITCH BOSS ON THE RIGHT MAIN LANDING GEAR ACTUATOR. SUSPECT DOWNLOCK SWITCH FREEZING IN THE RETRACTED POSITION. THE SWITCH ACTUATOR BALL AND SWITCH WERE LUBED AND RIGGED PER LEARJET MM 32-60-01. THE GEAR WAS CYCLED NUMEROUS TIMES WITH GOOD RESULTS AND A SUCCESSFUL CHECK FLIGHT WAS CARRIED OUT WITH NUMEROUS GEAR CYCLES. THE AIRCRAFT WAS RETURNED TO SERVICE.