C-DUCT OPERATIONThe opening mechanism is designed to hydraulically open and close the thrust reverser cowls. The thrust reverser opening mechanism is composed of: - one actuator for each C-duct- two hold open rods for each C-ductThe pressure is supplied by the hydraulic hand pump to extend the actuator. Actuators are operated until the C-duct is fully open. Once the C-duct is fully open, the hold open rods are installed and the pressure is released.The hold open rods lock automatically and keep the C-ducts open.NOTE: You must not open the thrust reverser cowls if wind speed is 46 MPH (73 KMH) or more.