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SUBTASK 27-51-01-740-003
(5) Do the Asymmetry Skew System BITE test with the FSEU [1]. To do the BITE test, do this task:
Trailing Edge Flap Asymmetry Skew System BITE Test, TASK 27-51-00-740-802.
SUBTASK 27-51-01-710-001
(6) Do a test of the air mode inhibit function of the FSEU [1]:
(a) Use the PSEU to simulate air mode. To simulate air mode, do this task: Put the Airplane in
the Air Mode, TASK 32-09-00-860-801.
NOTE: It is only necessary to simulate air mode with system 1.
(b) Push the ON/OFF button on the front panel of the FSEU [1] to turn it off and then on.
(c) Make sure that INHIBIT: IN AIR shows on the display window on the FSEU [1].
(d) Use the PSEU to return the airplane to ground mode. To return the airplane to ground
mode, do this task: Return the Airplane to the Ground Mode, TASK 32-09-00-860-802.
(e) Push the ON/OFF button on the front panel of the FSEU [1] to turn it off and then on.
(f) Make sure that INHIBIT: IN AIR does not show on the display window on the FSEU [1].
H. Put the Airplane Back to Its Usual Condition
SUBTASK 27-51-01-860-005
(1) Remove system B hydraulic power, do this task: Hydraulic System A or B Power Removal,
TASK 29-11-00-860-805.
SUBTASK 27-51-01-010-002
(2) Close this access panel:
Number Name/Location
117A Electronic Equipment Access Door
------------------------- END OF TASK ---------------------------
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AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
TRAILING EDGE FLAP BYPASS VALVE - REMOVAL/INSTALLATION
1. General
A. This procedure has these tasks:
(1) A removal of the trailing edge flap bypass valve assembly
(2) An installation of the trailing edge flap bypass valve assembly
(3) A removal of the trailing edge flap bypass valve and valve motor
(4) An installation of the trailing edge flap bypass valve and valve motor
(5) A removal of the trailing edge flap bypass valve motor
(6) An installation of the trailing edge flap bypass valve motor.
B. The trailing edge bypass valve assembly includes the valve housing, the bypass valve and the
bypass valve motor.
TASK 27-51-02-000-801
2. Trailing Edge Flap Bypass Valve Assembly Removal
(Figure 401)
A. General
(1) This task includes the removal of the bypass valve assembly as a unit. The bypass valve
assembly includes the housing, the valve and the valve motor.
B. References
Reference Title
27-51-00-040-801 Trailing Edge Flap System Deactivation (P/B 201)
29-09-00-860-802 Hydraulic Reservoirs Depressurization (P/B 201)
29-11-01-860-802 Hydraulic Reservoirs Depressurization (P/B 201)
32-00-01-480-801 Landing Gear Downlock Pins Installation (P/B 201)
C. Location Zones
Zone Area
134 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station
727.00 - Right
D. Prepare for the Removal
SUBTASK 27-51-02-480-001
WARNING: MAKE SURE THE DOWNLOCK PINS ARE INSTALLED ON ALL THE LANDING GEAR.
WITHOUT THE DOWNLOCK PINS, THE LANDING GEAR CAN RETRACT AND CAUSE
INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) If the downlock pins are not installed in the nose and main landing gear, do this task: Landing
Gear Downlock Pins Installation, TASK 32-00-01-480-801.
SUBTASK 27-51-02-040-001
(2) Do this task: Trailing Edge Flap System Deactivation, TASK 27-51-00-040-801.
SUBTASK 27-51-02-860-005
(3) Remove the pressure from the system B hydraulic reservoir. To remove the pressure, do this
task: Hydraulic Reservoirs Depressurization, TASK 29-11-01-860-802 or Hydraulic
Reservoirs Depressurization, TASK 29-09-00-860-802.
737-600/700/800/900
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EFFECTIVITY
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SUBTASK 27-51-02-860-006
(4) Open this circuit breaker and install safety tag:
F/O Electrical System Panel, P6-2
Row Col Number Name
A 7 C00210 FLIGHT CONTROL FLAP SHUTOFF VALVES
E. Trailing Edge Flap Bypass Valve Assembly Removal
SUBTASK 27-51-02-020-001
(1) Disconnect the electrical connector [5] from the bypass valve assembly [4].
SUBTASK 27-51-02-020-002
(2) Disconnect the hydraulic lines [1] from the bypass valve assembly [4]:
(a) Put a container below the bypass valve assembly [4] to hold the hydraulic fluid.
(b) Disconnect the hydraulic lines [1] from the bypass valve assembly [4].
(c) Install caps on the hydraulic lines [1] and plugs in the hydraulic ports.
SUBTASK 27-51-02-020-003
(3) Remove the flap bypass valve assembly [4]:
　
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