*
Rubstrips
The thrust reverser aft cowl has these components:
*
Pressure relief doors
*
Bulb type fire seals and metal fire seals
*
Hoop-tie tension latches and straps
*
Load share tension latches and straps
*
Aft cowl tension latches
Thrust Reverser
The thrust reverser is made of three major components; the translating sleeve, the fan duct cowl, and the aft cowl. The inner surface of the translating sleeve and the outer surface of the fan duct cowl forms the fan duct for the fan air exhaust. A cross-section view thru the thrust reverser, aft of the fan, shows a reduction in cross sectional area over the length of the fan duct; this feature is used to create thrust from the fan exhaust air.
78-31-00
Page 9 D633W101-BEJ May 05/2003
THRUST REVERSER SYSTEM -COMPONENTS
Thrust Reverser Sleeve
The translating sleeve is part of the thrust reverser assembly. The translating sleeve engages tracks in the fan duct cowl assembly with sliders. The sleeve has a supporting structure attached to the main and auxiliary sliders, the blocker doors and drag links, the acoustic panel assemblies, the inner wall panel and the outer wall panel assemblies. When the thrust reverser is retracted, the cascade segments fit between the inner and outer wall panels of the sleeve.
The thrust reverser sleeve is stowed in a forward position during flight. When commanded during landing, the hydraulic actuators move the two thrust reverser sleeves aft. Because the drag links are connected to the inner wall of the fan duct, this moves the blockers doors down to block the flow of fan exhaust between the fan duct cowl and sleeve and exposes the cascade segments. The fan exhaust is directed forward through the vanes of the cascade segments to produce reverse thrust.
Bullnose seals are installed circumferentially along the full length of the inner wall panel of the thrust reverser sleeve. When the thrust reverser is retracted, the bullnose seal is compressed against the bullnose fairing on the torque box. The bullnose seal prevents aerodynamic pressurization of the inner and outer walls of the translating sleeve from the fan air exhaust. The loss of more than 65 percent of the bullnose seal may allow separation of the sleeve outer wall panel from the auxiliary track slider.
Thrust Reverser Fan Duct Cowl
The fan duct cowl is part of the thrust reverser assembly. There are a left and right fan duct cowl for each engine. The fan duct cowl assembly consists of the following: a one piece inner wall with upper and lower bifurcation and acoustic features, the precooler inlet duct, the forward torque box, the cascade aft attachment ring, the cascade segments, duct ventilation, the upper hinge and track beam, the lower latch and track beam, the V-band latch and the V -groove latch bands, the power door opening system (PDOS) opening actuator attachment fittings and the main and auxiliary tracks and track liners for the translating sleeve. 中國(guó)航空網(wǎng) m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：777 AMM 飛機(jī)維護(hù)手冊(cè) 發(fā)動(dòng)機(jī)排氣 Engine Exhaust PW 777 AIRCRAFT MAINTENANCE MANUAL(10)
