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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
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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
between the primary hydraulic system and the standby system
exceeds 125 psi.
For example, hydraulic system A usually powers T/R 1. The left
shuttle valve will move if system A pressure goes 125 psi below
the standby system pressure. The standby hydraulic system
then supplies hydraulic power to the T/R 1 hydraulic control
module. The shuttle valve moves back when system A pressure
goes 125 psi above the standby system pressure.
The right shuttle valve selects the hydraulic power source for T/
R 2. Hydraulic system B is the normal source. Like T/R 1, the
standby system is the alternate source for T/R 2.
THRUST REVERSER CONTROL SYSTEM - SHUTTLE VALVES
EFFECTIVITY
GUN ALL 78-34-00
Page 26
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
78-34-00-011
THRUST REVERSER CONTROL SYSTEM - SHUTTLE VALVES
THRUST REVERSER CONTROL SYSTEM - SHUTTLE VALVES
EFFECTIVITY
GUN ALL 78-34-00
Page 27
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
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