The thrust reverser cascade segments are made of a composite graphite-epoxy material. The cascade segments have attachment flanges at the forward and aft edge of the segment. Webs that go between the forward flange to the aft flange are called strongbacks which transfer the reverse thrust loads from the vanes to the attach flanges. Between the strongbacks are rows of cascade vanes which turn the airflow to the correct direction for that cascade segment.
EFFECTIVITY
BEJ ALL
There are ten different types of cascade segments. Each type causes the fan airflow to go out in a different direction.
There are actuator guide brackets that are mounted on the cascade segments. These guides are between the cascade segments 1 and 2, 4 and 5, 7 and 8, 9 and 10, 12 and 13, and 15 and 16.
Training Information Point
You must extend the thrust reverser sleeve to examine, remove or install the thrust reverser cascade segments.
You must install the correct cascade segment in the correct location for the left or right engine installation. The cascade segment installation for the left engine is different from the cascade segment installation for the right engine. If the cascade segments are installed in the incorrect location, the reverse thrust airflow from the segment could cause engine ingestion of unwanted materials and cause damage to the engine and affect the control surfaces.
CAUTION: INSTALL THE CASCADE SEGMENTS IN THE
CORRECT POSITION ON THE THRUST
REVERSER. IF YOU INSTALL THE CASCADE
SEGMENTS IN THE INCORRECT POSITION,
DAMAGE TO EQUIPMENT CAN OCCUR.
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THRUST REVERSER SYSTEM -CASCADE SEGMENTS
WARNING: DO THE DEACTIVATION PROCEDURE TO PREVENT THE OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONNEL AND DAMAGE TO EQUIPMENT
CAUTION: DO NOT LIFT OR MOVE THE THRUST REVERSER HALF UNLESS THREE CASCADE SEGMENTS ARE INSTALLED. BETWEEN THE INSTALLED SEGMENTS, NO MORE THAN TWO CASCADE SEGMENTS CAN BE MISSING. DAMAGE TO THE THRUST REVERSER STRUCTURE CAN OCCUR.
EFFECTIVITY BEJ ALL 78-31-00
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D633W101-BEJ May 05/2003
THRUST REVERSER SYSTEM -CASCADE SEGMENTS
EFFECTIVITY BEJ ALL 78-31-00
Page 37
D633W101-BEJ May 05/2003
THRUST REVERSER SYSTEM -FIRE SEALS
General
This thrust reverser uses a flexible rubber bulb-seal type fire seal.
Purpose
The fire seals help to contain an undercowl fuel-fed fire.
The upper rubber fire seals closes the gap between the strut structure and the thrust reverser upper bifurcation walls. The upper fire seal extends down the upper aft edge of the aft cowl to contain a fire at the aft cowl strut fairing. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 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(21)
