777 AMM 飞机维护手册 发动机排气 Engine Exhaust PW 777 AIRCRAFT MAINTENANCE MANUAL(26)

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In the hinge fitting, the barrel nut has a self-locking feature that can become worn.The barrel nut is held in the hinge fitting with a retainer.The retainer fits on the flat surface of the barrel nut.The curved part of the retainer has a raised top that indexes the retainer to the hole for the hinge bolt in the hinge fitting. The barrel nut and retainer can be replaced.
Training Point Information
You must open the thrust reverser to get access to the hinge components and the pressure relief latches for the door.
Ground support equipment is used to determine if the pressure relief latches operate at the correct load.

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THRUST REVERSER PRESSURE RELIEF DOORS

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THRUST REVERSER ACTUATION SYSTEM (TRAS) -INTRODUCTION
General

The thrust reverser actuation system (TRAS) supplies hydraulic power to extend or retract the T/R sleeves.
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THRUST REVERSER ACTUATION SYSTEM (TRAS) -INTRODUCTION

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TRAS -GENERAL DESCRIPTION

General

The thrust reverser actuation system (TRAS) supplies hydraulic power to move the thrust reverser sleeves. It operates on the ground only.
The TRAS uses hydraulic power for operation and electrical power for control.
The TRAS uses these valves to control hydraulic pressure to the hydraulic actuators:
*
Sync lock valve (SLV)

*
Isolation valve (IV)

*
Directional control valve (DCV).

The hydraulic actuators move the thrust reverser sleeves.

The sync shafts keep the movement of the actuators together. They also permit manual operation of the thrust reverser sleeves for maintenance.
The sync lock/manual drive units lock the sync shafts in the retracted position.
EFFECTIVITY BEJ ALL
The reverse thrust lever interlock actuator prevents the maximum reverse thrust command until the thrust reverser sleeves get near the extended position. The electronic engine control (EEC) uses thrust reverser sleeve position data from the rotary variable differential transducers (RVDTs) to control the interlock actuator.
　
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