(b)  
The fault indication circuit can detect an energized control system for the thrust reverser in flight and faults in the control system or in the hydraulic/mechanical portion of the thrust reverser during reverser operation.

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 78-36-00
 ALL  ú ú N01 Page 7 ú Feb 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
THRUST REVERSER INDICATION SYSTEM - ADJUSTMENT/TEST
___________________________________________________
 1.  General
_______
 A.  This procedure gives instructions to do a check of the CMC messages and the wiring test of the disagreement circuit for the thrust reverser. The EICAS message ENG X REVERSER will show when there is a failure in the thrust reverser system.
 NOTE:____"X" is the applicable engine number: 1, 2, 3, or 4.
 B.  The circuit for the EICAS message ENG X REVERSER has a time delay mechanism to prevent nuisance messages. It can require up to 90 seconds for the EICAS message ENG X REVERSER to show.
 TASK 78-36-00-705-001-N01
 2.  Do a Check of the Disagree Circuit for the Thrust Reverser System
_________________________________________________________________
 A.  References
 (1)
AMM 24-22-00/201, Manual Control

 (2)
AMM 29-11-00/201, Main Hydraulic System

 (3)
AMM 31-61-00/201, Integrated Display System

 B.  
Access

 (1)  
Location Zones
 450 Engine Strut 1
 460 Engine Strut 2
 470 Engine Strut 3
 480 Engine Strut 4

 (2)  
Access Panels
 451 Forward Fairing - Engine Strut 1
 452 Forward Fairing - Engine Strut 2
 453 Forward Fairing - Engine Strut 3
 454 Forward Fairing - Engine Strut 4

 C.  
Preconditions

 S 865-074-N01
 (1) These conditions are necessary for this task:
 (a) Electrical power on (AMM 24-22-00/201).
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 78-36-00
 IDS SOFTWARE.  ú CONFIG 1 ú N03 Page 501 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(b)  
Integrated Display System (IDS), serviceable
 (AMM 31-61-00/501).

 (c)  
Any other system that you need to perform the task.

 (d)  
Airplane must be in the Ground Mode (AMM 32-09-02/201).

 D. Do a Check of the Disagree Circuit.
 S 865-002-N01
 (1)  Make sure the thrust reverser is in the fully stowed position.
 S 865-070-N01
 WARNING: MAKE SURE THAT ALL PERSONS AND EQUIPMENT ARE CLEAR OF THE LE
_______ AND TE FLAPS AND FLAP DRIVE MECHANISMS DURING THIS ADJUSTMENT/TEST PROCEDURE. THE FLAPS WILL MOVE IF YOU MOVE THE FLAP CONTROL LEVER. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 WARNING: MAKE SURE THAT ALL PERSONS AND EQUIPMENT ARE CLEAR OF THE SPEED
_______
 BRAKES. THE SPEED BRAKES CAN RETRACT QUICKLY AND CAUSE INJURY
 TO PERSONS OR DAMAGE TO EQUIPMENT.

 (2)  Supply electrical power (AMM 24-22-00/201).
 S 865-003-N01
 CAUTION: DO ALL PRECAUTIONARY PROCEDURES FOR THE "AIR MODE SIMULATION".
_______
 DAMAGE TO EQUIPMENT CAN OCCUR IF YOU DO NOT DO THESE
 PROCEDURES.

 (3)  Put airplane in the GROUND mode (AMM 32-09-02/201).
 S 865-004-N01
 WARNING:_______REMOVE THE HYDRAULIC PRESSURE BEFORE YOU DO THIS CHECK. IF YOU DO NOT REMOVE THE HYDRAULIC PRESSURE, THE THRUST REVERSER SLEEVES CAN MOVE QUICKLY WHEN THE REVERSE THRUST LEVERS ARE MOVED. THIS COULD CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (4)  
Do this task: Hydraulic System Depressurization (AMM 29-11-00/201).

 (5)  
Make sure the fire handle is in the usual position.

 S 865-006-N01

 (6)  
For the applicable engine, make sure these circuit breakers on the
　
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