(1)
The following faults are monitored and indicated by illumination of the light:
(a)
Disagreement between the directional control and isolation valves located within the reverser hydraulic control valve module, i.e., isolation valve open and directional control valve not in the deploy position.
(b)
Disagreement in the positions of the two translating sleeves on one engine for more than two seconds. The two-second time delay allows for any variations in the deploy/stow translation time of the two sleeves on one engine.
(2)
The 'REVERSER' fault light is included in the master caution and warning system.
(a) A time delay inhibits activation of the master caution and warning system for a minimum of 12 seconds following illumination of the 'REVERSER' fault light.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
PILOTS' CENTER INSTRUMENT PANEL
12
ENGINE
REVERSER REVERSER
PILOTS' AFT OVERHEAD PANEL
Thrust Reverser Indicator Light Location
Figure 1 (Sheet 1)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
E3 RACK
FAIL
(FAULT)
LIGHT
(2 LOCATIONS)
Thrust Reverser Indicator Light Location
Figure 1 (Sheet 2)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
E3 RACK
FAULT LIGHT (6 LOCATIONS)
RESET SWITCH (2 LOCATIONS)
ENGINE ACCESSORY UNIT
Thrust Reverser Indicator Light Location
Figure 1 (Sheet 3)
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C98777
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
E3 RACK
FAULT LIGHT (16 LOCATIONS)
ENGINE ACCESSORY UNIT
Thrust Reverser Indicator Light Location
Figure 1 (Sheet 4)
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C57140
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(b) This delay allows time for completion of the normal stowing cycle, during which there is disagreement between the directional control and isolation valves before the activation of the master caution system.
3. Engine Accessory Unit (EAU)
_____________________
A. In addition, for maintenance purposes, the 'REVERSER' fault lights are duplicated by lights located on the face of the Engine Accessory Unit (EAU) in the rack in the electronic equipment bay.
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