DOC AIRBUS | AMM A320FTHRUST REVERSER OPENING MECHANISM - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The purpose of the thrust reverser opening mechanism is to open the C-duct doors to permit access to the engine for maintenance. The opening system is manually operated by a GSE hydraulic hand pump.
** ON A/C NOT FOR ALL The purpose of the thrust reverser opening mechanism is to open the C-duct doors to permit access to the engine for maintenance. The opening system is manually operated by a GSE hydraulic hand pump.
Thrust Reverser Opening MechanismA. General
The thrust reverser opening mechanism consists of two parts for each C-duct door : the opening actuator and the hydraulic tube.
The thrust reverser opening mechanism consists of two parts for each C-duct door : the opening actuator and the hydraulic tube.
B. Opening Actuator
The opening actuator acts as a piston with the base attached to the top of the C-duct door and the end to the pylon. As the hydraulic pressure builds up in the actuator, the piston extends to move the door outward.
The actuator is not designed to hold the weight of the door for a long time. The door hold open rods must be positioned to support the door.
The opening actuator acts as a piston with the base attached to the top of the C-duct door and the end to the pylon. As the hydraulic pressure builds up in the actuator, the piston extends to move the door outward.
The actuator is not designed to hold the weight of the door for a long time. The door hold open rods must be positioned to support the door.
C. Hydraulic Tubing
The hydraulic tubing is made up of three parts : a flexible hose, a hard tubing and a manifold connector.
The hydraulic tubing is made up of three parts : a flexible hose, a hard tubing and a manifold connector.
(1) The flexible hose connects to the opening actuator to absorb the rocking movement of the actuator as the C-duct door opens and closes.
The flexible hydraulic hose is inside a larger conduit. Fan air from the precooler is brought into the area between the hose and the cover to cool the hydraulic fluid. The two ends of the cover are half-shells made of firm fiber-glass. The half-shells at the opening actuator can be separated to permit access to the hydraulic tube connection. The single half-shell at the lower end can be raised to permit access to the hydraulic tube connection.
The flexible hydraulic hose is inside a larger conduit. Fan air from the precooler is brought into the area between the hose and the cover to cool the hydraulic fluid. The two ends of the cover are half-shells made of firm fiber-glass. The half-shells at the opening actuator can be separated to permit access to the hydraulic tube connection. The single half-shell at the lower end can be raised to permit access to the hydraulic tube connection.
(2) The hard hydraulic tubing connects to the flexible hose and runs down the forward edge of the C-duct door. Near the bottom of the door the tubing connects to the manifold.
(3) The manifold has three connection points. It connects to the bottom end of the hard hydraulic tubing. It has a quick release connector for the hydraulic hand pump. It has a pressure relief valve to protect the opening actuator system from high pressure.
D. Cowl Latch
A total of six latches are used to secure the two 'C' ducts to each other.
Access to front latch is through the left and right fan cowls.
Three latches are located under a hinged access panel.
Rear latch is a double latch but the two latches must be released/latched individually.
A total of six latches are used to secure the two 'C' ducts to each other.
Access to front latch is through the left and right fan cowls.
Three latches are located under a hinged access panel.
Rear latch is a double latch but the two latches must be released/latched individually.
3. Operation
The thrust reverser cowls can be opened to a 45 degree position for engine removal or other maintenance purposes.
The thrust reverser cowls can be opened to a 45 degree position for engine removal or other maintenance purposes.