Exhaust – Thrust Reverser

Typical thrust reverser system

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Thrust reverser cowl

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T/R stowed and deployed

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T/R stowed and deployed

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Thrust reverser operation

POWER SUPPLY

NORMAL

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Non-locking actuators

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Locking actuators

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Synchronization Lock

1st PROTECTION

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Sync lock circuit

2ND PROTECTION

ENERGISE TO UNLOCK

THRUST REVERSER LEVER ‘ UP’

29 DEG REVERSER LEVER ANGLE

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Sync lock circuit

2ND PROTECTIONSTOWING OPERATION

STAY UNLOCKED

HOLD POWER

AFTER 5 SEC

STEP 1

STEP 2

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SYNC LOCK

FULLY STOWED

LOCKED

RELAY LOSS POWER

DE-ENERGISES

MAGNETICALLY UNLATCHEDSTEP 3

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Thrust reverser control circuit

Electrical controlled ,hydraulic operated

PW4000

PREVENT REVERSE THRUST

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Thrust reverser control switches

SEND SIGNAL TO REVERSER ISOLATION VALVE

1.SEND SIGNAL TO DCV

2. UNLOCK SYNC LOCK MECHANISM

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Thrust reverser microswitch pack

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Thrust reverser interlock system

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Thrust reverser interlock actuator

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Interlock actuator operation

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Interlock function diagram

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Thrust reverser isolation valve

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Thrust reverser position indication

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Thrust reverser auto-restow switch

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Auto-restow sensors

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Auto-restow functional diagram

ON GROUND ONLY

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Position disagreement indication

FAILURE TO OPERATELOW HYDRAULIC

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Proximity sensors

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Thrust reverser position indication circuit

REV

REV

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Thrust reverser LVDT

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Sleeve manual deployment

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Manual deployment – non-locking actuators

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Isolation valve deactivation

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Thrust reverser sleeve deactivation