What was found
WHEN GEAR SELECTED DOWN, RIGHT MAIN GEAR DOWN LIGHT DID NOT COME ON AND RED UNLOCK LIGHT ILLUMINATED. CHECKLIST ACCOMPLISHED, BOTTLE BLOWN BUT INDICATIONS REMAINED THE SAME. ABOUT 3 MINUTES LATER RIGHT MAIN GEAR INDICATED DOWN AND LOCKED EXTINGUISHED. REPLACED MAIN LANDING GEAR ACTUATOR (RIGHT) WITH AN INSPECTED UNIT FROM CESSNA AIRCRAFT CO RS NR CNQR918C, PER 560XL MM, CH-32-30-04. LEAK AND OPERATIONAL CHECK GOOD.