What was found
(CAN) ON FINAL WHEN GEAR WAS SELECTED DOWN A/C LOST NO2 HYD FLUID AND ISO VALVE LIGHT CAME ON. MAINTENANCE FOUND THE LEAK WAS SOURCE WAS A CRACK IN THE RT GEAR AFT AND CENTER DOOR ACTUATOR HOUSING. REMOVED AND REPLACED DOOR ACTUATOR WITH NEW IAW AMM 32-10-36 AND FUNCTION CHECKED AND LEAK CHECKED WITH NO FAULTS FOUND. ONCE THE PART WAS ROUTED TO THE O/H SHOP THE CRACK WAS VERIFIED AT THE TOP OF THE ACTUATOR.