EFFECTIVITY BEJ ALL 78-31-00
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D633W101-BEJ May 05/2003
THRUST REVERSER SYSTEM -COMPONENTS
The inner wall forms part of the fan duct of the thrust reverser. The inner wall is a large one-piece composite structure that forms the upper bifurcation, the cowl that covers the engine core, and the lower bifurcation. On the airflow side, the inner wall has acoustic features. The hinge beam is attached to the upper bifurcation and the latch beam is attached to the lower bifurcation. The inner wall also has blocker door drag link mounts, the upper and lower bifurcation fire seals, vertical v-blade seals and engine core v-blade, the upper bifurcation compression pads and lower bifurcation compression pads. The inner wall for the left thrust reverser has the nacelle zone ventilation air duct. The inner wall for the right thrust reverser has the turbine case cooling (TCC) inlet air duct, the precooler inlet and transition air ducts and the 2.9 (start) bleed valve air duct. Most of the inner wall is made of honeycomb composite materials.
The torque box is a semi-circular structure that connects the upper hinge beam and the lower latch beam. The torque box also has a v-blade that engages the v-groove in the engine fan case. The hydraulic locking and non-locking actuators are installed through the torque box and the forward actuator gimbals are pinned to fittings on the torque box. The deploy and retract hydraulic tubing, and the sync shaft tube are located by tubing clamps mounted on the torque box. Wire bundles for the rotary variable differential transducer (RVDT) and the proximity sensors on the locking actuators and the sync lock/manual drive unit are attached to the torque box with wire bundle clamps. The v-groove latch bands and the v-band latch are attached to the torque box with clips. The forward attachment points for the cascade segments are on the aft side of the torque box.
The cascade aft attachment ring is a semi-circular structure connects the upper hinge beam with the lower latch beam and provides the aft attachment points for the cascade segments.
The upper hinge beam has machined flanges for the bushings for the No. 1, 2, 3 and 4 hinges. The upper hinge beam also has structure for the forward hinge cover, center hinge cover, aft hinge cover which give access to the hinges.
EFFECTIVITY BEJ ALL 78-31-00
Page 11
D633W101-BEJ May 05/2003
THRUST REVERSER SYSTEM -COMPONENTS
There are five compression pads mounted on fittings on the left and right upper bifurcations which engage pads on the strut. The compression pads transfer the fan duct pressure load to the strut. Continued operation is not permitted with the compression pads damaged or missing. The upper bifurcation compression pads are adjustable with spacers. The pads on the strut are not adjustable. 中國航空網 m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：777 AMM 飛機維護手冊 發動機排氣 Engine Exhaust PW 777 AIRCRAFT MAINTENANCE MANUAL(11)
