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EFFECTIVITY
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-81-00-019
LE FLAP AND SLAT CONTROL SYSTEM - COMPONENT LOCATIONS 3
LE FLAP AND SLAT CONTROL SYSTEM - COMPONENT LOCATIONS 3
EFFECTIVITY
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-81-00-019
Purpose
The TE flap PDU gives mechanical inputs to the LE flap and slat
control valve. The LE flap and slat control valve sends hydraulic
power to the LE flap and slat actuators.
Location
The LE flap and slat control valve is on the TE flap control unit in
the MLG wheel well. The TE flap control unit is on the right side
of the aft bulkhead, near the ceiling.
Physical Description
Through the follow-up cables, the TE flap PDU gives mechanical
inputs to the LE flap and slat control valve. As the TE flaps
move, the follow-up cables move the follow-up drum on the TE
flap control unit. The follow-up drum moves a cam roller, which
moves the LE flap control valve link. This link moves the LE flap
and slat control valve. The LE flap and slat control valve sends
hydraulic power to the LE flap and slat actuators and to the
autoslat control valve.
See the trailing edge flap system section for more information
on the TE flap PDU and TE flap control unit. (SECTION 27-51)
Training Information Point
If the alignment of the LE flaps and slats is not correct, you can
adjust the LE flap and slat control valve. Install the rig pin during
adjustment of the LE flap and slat control valve. Remove the
cover on the bottom of the flap control unit to install the rig pin.
CAUTION: DO NOT INSTALL THE RIG PIN IN THE FLAP
CONTROL UNIT WITH THE HYDRAULIC SYSTEM
PRESSURIZED. YOU CAN CAUSE DAMAGE TO
THE FLAP CONTROL UNIT.
LE FLAP AND SLAT CONTROL SYSTEM - LE FLAP AND SLAT CONTROL VALVE
EFFECTIVITY
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-81-00-005
LE FLAP AND SLAT CONTROL SYSTEM - LE FLAP AND SLAT CONTROL VALVE
LE FLAP AND SLAT CONTROL SYSTEM - LE FLAP AND SLAT CONTROL VALVE
EFFECTIVITY
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-81-00-005
Purpose
The LE cruise depressurization valve prevents LE flap and slat
extension during cruise.
Location
The LE cruise depressurization valve is on the ceiling in the
main landing gear wheel well.
Physical Description
The LE cruise depressurization valve has a 28v dc solenoidoperated
valve and a pressure-operated valve.
The LE cruise depressurization valve is identical and
interchangeable with the LE UCM shutoff valve.
Functional Description
The LE cruise depressurization valve is normally open. This
permits hydraulic system B pressure to the LE flap and slat
control valve. The LE flap and slat control valve sends this
pressure to the extend lines of the LE flap and slat actuators.
The FSEU controls the solenoid operated valve in the LE cruise
depressurization valve.
When the FSEU sends a signal to energize the solenoid valve
operated valve, it moves and sends pressure to move the
pressure-operated valve.
This stops the hydraulic system B pressure to the LE flap and
slat control valve. This prevents extend pressure to the LE flap
and slat actuators.
Training Information Point
To extend the TE flaps without extension of the LE flaps and
slats, move the manual override lever on the LE cruise
depressurization valve. Then put a pin in the lever with the
valve in the closed position. This prevents the movement of LE
flaps and slats when the TE flaps move. Make sure you remove
the pin from the LE cruise depressurization valve manual
override lever to reactivate the LE flaps and slats.
LE FLAP AND SLAT CONTROL SYSTEM - LE CRUISE DEPRESSURIZATION VALVE
EFFECTIVITY
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-81-00-018
LE FLAP AND SLAT CONTROL SYSTEM - LE CRUISE DEPRESSURIZATION VALVE
LE FLAP AND SLAT CONTROL SYSTEM - LE CRUISE DEPRESSURIZATION VALVE
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