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you deactivate the T/R for maintenance.
Physical Description
Each T/R control valve module has these internal components:
* Isolation valve
* Directional control valve
* Isolation valve proximity sensor
* Directional control valve proximity sensor
* Arm solenoid
* Stow solenoid
* Deploy solenoid
* Manual isolation (shutoff) valve.
See the functional description pages of this section for more
information about how these components work in the T/R
control system.
The manual isolation valve handle has a hole for the T/R
maintenance deactivation pin.
Location
The T/R control valve modules are in the main gear wheel on
the keel beam. The T/R 1 control valve module is on the left
side. The T/R 2 control valve module is on the right side.
Training Information Point
You use the manual isolation valve handle to prevent accidental
operation of T/Rs when persons or equipment are near the T/R.
You put in a lock pin to keep the handle in the shutoff position.
The T/R deactivation for maintenance is different than the T/R
deactivation for airplane dispatch. Be sure to follow the airplane
maintenance manual (AMM) procedures.
WARNING: BEFORE YOU REMOVE THE LOCK PIN FROM THE
T/R CONTROL VALVE MODULE FOR THE THRUST
REVERSER, MAKE SURE THE THRUST REVERSER
SLEEVES ARE IN THE CORRECT POSITION. IF THE
THRUST REVERSER SLEEVES ARE IN THE
STOWED POSITION, THE REVERSE THRUST
LEVER MUST BE FULLY FORWARD. IF THE
THRUST REVERSER SLEEVES ARE IN THE
DEPLOYED POSITION, THE REVERSE THRUST
LEVER MUST NOT BE IN THE STOWED
POSITION. IF THE POSITION OF THE REVERSE
THRUST LEVER DOES NOT AGREE WITH THE
POSITION OF THE THRUST REVERSER SLEEVES,
THE THRUST REVERSER SLEEVES COULD MOVE
WHEN THE HYDRAULIC SYSTEM IS ACTIVATED.
THIS COULD CAUSE INJURY TO PERSONS AND
DAMAGE TO EQUIPMENT.
The T/R control valve module is a line replaceable unit (LRU).
You should not replace the module’s components on the line.
THRUST REVERSER CONTROL SYSTEM - CONTROL VALVE MODULE
EFFECTIVITY
GUN ALL 78-34-00
Page 22
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-34-00-009
THRUST REVERSER CONTROL SYSTEM - CONTROL VALVE MODULE
THRUST REVERSER CONTROL SYSTEM - CONTROL VALVE MODULE
EFFECTIVITY
GUN ALL 78-34-00
Page 23
D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-34-00-009
General
There are three volumetric hydraulic fuses in the thrust
reverser (T/R) control system.
Purpose
The volumetric fuses close and stop hydraulic fluid flow to
prevent a complete loss of system hydraulic fluid if a leak
occurs.
Component Location
The standby hydraulic system supply lines to the thrust
reversers have two fuses. There is one fuse in the supply line
to each T/R. These fuses are on the keel beam in the wheel
well. The left fuse is in the supply line to T/R 1. The right fuse is
in the supply line to T/R 2.
The third fuse is in the system A hydraulic supply line to T/R 1.
This fuse is on main gear wheel well forward bulkhead, on the
left side. System B does not have a fuse in its supply to T/R 2.
Functional Description
A volumetric fuse lets approximately 175 cubic inches of fluid
flow through before it closes. The fuse opens when the
hydraulic pressure on the two sides of the fuse are
approximately the same.
THRUST REVERSER CONTROL SYSTEM - VOLUMETRIC HYDRAULIC FUSES
EFFECTIVITY
GUN ALL 78-34-00
Page 24
D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-34-00-010
THRUST REVERSER CONTROL SYSTEM - VOLUMETRIC HYDRAULIC FUSES
THRUST REVERSER CONTROL SYSTEM - VOLUMETRIC HYDRAULIC FUSES
EFFECTIVITY
GUN ALL 78-34-00
Page 25
D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-34-00-010
Purpose
The shuttle valve selects the hydraulic source for T/R operation.
Component Location
The two shuttle valves are on the keel beam in the main gear
wheel well.
General
There are two shuttle valves in the T/R reverser control system.
Functional Description
The shuttle valves move whenever the pressure difference
　
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