*
Fan duct cowl
*
Aft cowl
*
Upper bifurcation
*
Lower bifurcation
*
Hinge beam
*
Latch beam
*
Sliders and tracks
*
Cascade segments
*
Blocker doors
*
Sleeve
*
Blocker door drag links
EFFECTIVITY BEJ ALL
The thrust reverser system has fixed and translating structure, and components that provide actuation, control, indication and fault isolation/annunciation. The fixed and translating structure form the fan duct when in the forward position. When actuated for reverse thrust operation, the structure redirects the fan flow to produce reverse thrust. The actuation system has hydraulic actuators and valves. The control system controls the valves which provide hydraulic pressure to extend (deploy) and retract (stow) the translating structure or T/R sleeve. The indication system provides thrust reverser position and valve, sync-lock, actuator lock status to the airplane for flight crew and maintenance crew information.
The fixed structure is the inner wall for the fan duct cowl, cascades and torque box. The torque box forms the outer ring of the thrust reverser structure and also serves as a firewall. The torque box is attached to the hinge beam and latch beam at the front of the thrust reverser. The torque box provides the fixed structure to mount the thrust reverser actuation system. The v-blade of the torque box fits around the v-groove of the engine fan case when the thrust reverser is closed and latched. The torque box is an aluminum and steel structure.
Tension latches, a V-band anchor and V-groove latch band hold the halves together.
The T/R sleeve is part of the fan duct. It uses sliders to move forward and aft in the tracks. The inner acoustic panels of the sleeve are composite.
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THRUST REVERSER SYSTEM -GENERAL DESCRIPTION
The fan duct cowl and aft cowl cover the inner engine core. The fan duct cowl, the upper and lower bifurcation, and the inner surface of the sleeve forms the fan duct. The v-blade at the front of the fan duct cowl fits around the v-groove of the engine core when the thrust reverser is closed and latched. The fan duct cowl is a honeycomb composite structure.
The aft cowl provides a load share structure for the engine. The aft cowl also gives a smooth surface for the fan air that comes from the fan duct. The aft cowl is mostly a titanium alloy structure.
The upper bifurcation connects the top of the fan duct cowl to the hinge beam. The lower bifurcation connects the bottom of the fan duct cowl to the latch beam. The upper and lower bifurcation is a composite structure.
The sixteen cascade segments are attached between the torque box and the aft support ring. The aft support ring is connected between the hinge beam and the latch beam. The cascade segments are a composite structure.
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本文链接地址：777 AMM 飞机维护手册 发动机排气 Engine Exhaust PW 777 AIRCRAFT MAINTENANCE MANUAL(8)
