What was found
DISCREPANCY: THE RED GEAR HANDLE UNSAFE LIGHTS REMAINED ILLUMINATED AND THE RIGHT MAIN GEAR SAFE LIGHT REMAINED DARK WITH THE GEAR HANDLE IN THE DOWN POSITION. THE J HOOK WAS ALSO NOT VISIBLE. CYCLED THE LANDING GEAR ONE TIME AND THE SAME CONDITION CONTINUED UPON EXTENDING THE GEAR A SECOND TIME. COMPLETED THE EMERGENCY GEAR EXTENSION CHECKLIST AND UPON PUMPING THE MANUAL GEAR LEVER THREE TIMES THE RIGHT MAIN GEAR SAFE LIGHT ILLUMINATED. LANDING WAS UNEVENTFUL. CORRECTIVE ACTION: REPLACED LANDING GEAR ACTUATOR WITH NEW, LEAK AND FUNCTIONAL CHECK SATISFACTORY.