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* Fault isolation.
Refer to the functional description in this section for more
information about how the EAU uses this input.
See the thrust reverser indicating system section for more
information about T/R fault indication. (SECTION 78-36)
Location
The sensor is on the head end of the T/R locking actuator. You
open the fan cowl to get access to the sensor. Each T/R locking
hydraulic actuator has a sleeve lock proximity sensor.
Therefore, there is one sensor for each T/R translating sleeve.
General
Each sensor has two output levels. One level for the lock
position, the other level for the unlock position.
The sensor is a proximity type sensor. The actuator’s manual
unlock lever is the target for the sensor. The sensor’s output
changes when target is close (near).
Functional Description
The EAU supplies excitation to the sensor. The EAU sees a
large change in the sensor’s output when the target is close
(near).
The manual unlock lever (target) moves close to the sensor
when the hydraulic actuator unlocks during a T/R deploy
operation. The lever stays in this position until the sleeve comes
back to the stow position and the hydraulic actuator locks.
THRUST REVERSER CONTROL SYSTEM - THRUST REVERSER SLEEVE LOCK PROXIMITY SENSOR
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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
78-34-00-006
THRUST REVERSER CONTROL SYSTEM - THRUST REVERSER SLEEVE LOCK PROXIMITY SENSOR
THRUST REVERSER CONTROL SYSTEM - THRUST REVERSER SLEEVE LOCK PROXIMITY SENSOR
EFFECTIVITY
GUN ALL 78-34-00
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-34-00-006
Purpose
The thrust reverser sleeve stow proximity sensor supplies a
stow/not stowed signal to the engine accessory unit (EAU).
The EAU uses this signal for these functions:
* Normal T/R stow control
* Auto-restow control
* Fault logic and fault indication
* Fault isolation.
Refer to the functional description in this section for more
information about how the EAU uses this input.
See the thrust reverser indicating system section for more
information about T/R fault indication. (SECTION 78-36)
Location
The sensor is on the forward face of the T/R torque box. The
target crank assembly is also on the forward face of the T/R
torque box. Each T/R sleeve has a sensor and a target. You
open a fan cowl to get access to a sensor and its target.
General
Each sensor has two output levels. One level for the stow
position, the other level for the not stowed position. The
sensor’s output changes when the sensor’s target is close
(near).
The target is part of a crank. Two small torsion springs put a
force on the crank. A plunger, on the T/R translating sleeve,
keeps the target away (far) from the sensor when the sleeve is
in the stow position.
Functional Description
The EAU supplies excitation to the sensor. The EAU sees a
large change in the sensor’s output when the sensor’s target is
close (near).
The target moves close (near) to the sensor when the T/R
sleeve moves out of the stow position during a T/R deploy
operation. This is why the target moves:
* The plunger moves away from the crank’s roller as the T/R
translating sleeve moves aft
* The small torsion springs supply a force to the crank,
opposite to the plunger’s force
* The crank turns and the target moves close (near) to the
sensor.
The target stays in the near position until the sleeve comes back
to the stow position and the plunger turns the crank.
The output of the sensor stops changes because its target is
away (far).
THRUST REVERSER CONTROL SYSTEM - THRUST REVERSER SLEEVE STOW PROXIMITY SENSOR
EFFECTIVITY
GUN ALL 78-34-00
Page 16
D633A101-GUN Jun 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-34-00-012
THRUST REVERSER CONTROL SYSTEM - THRUST REVERSER SLEEVE STOW PROXIMITY SENSOR
THRUST REVERSER CONTROL SYSTEM - THRUST REVERSER SLEEVE STOW PROXIMITY SENSOR
EFFECTIVITY
GUN ALL 78-34-00
Page 17
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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