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control valve sends hydraulic power to the LE slat actuators to
fully extend the LE slats.
See the leading edge autoslat system section for more
information on the autoslat valve. (SECTION 27-83)
See the stall warning system section for more information on
the SMYDs. (SECTION 27-32)
See the trailing edge flap system section for more information
on the TE flap system. (SECTION 27-51)
LE FLAP AND SLAT CONTROL SYSTEM - GENERAL DESCRIPTION
EFFECTIVITY
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Alternate Operation
During the alternate operation, the alternate flaps switches
send a signal to the LE standby shutoff valve and to the standby
hydraulic system. The LE standby shutoff valve sends hydraulic
power to the LE flap and slat actuators to extend the LE flaps
and slats. Hydraulic power from the LE standby shutoff valve
has priority over the hydraulic power from the LE flap and slat
control valve.
During the alternate operation, the LE flaps and slats can not
retract.
LE FLAP AND SLAT CONTROL SYSTEM - GENERAL DESCRIPTION
EFFECTIVITY
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LE FLAP AND SLAT CONTROL SYSTEM - GENERAL DESCRIPTION
LE FLAP AND SLAT CONTROL SYSTEM - GENERAL DESCRIPTION
EFFECTIVITY
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General
The LE flap and slat system components are in these areas:
* Flight deck
* Main landing gear (MLG) wheel well
* Right wing-to-body fairing
* Wing.
The components outside of the flight deck are shown later.
Flight Deck Components
The LE devices annunciator panel is on the P5 aft overhead
panel. The LE FLAPS TRANSIT light and the LE FLAPS EXT light
are on the P2 pilots center panel.
LE FLAP AND SLAT CONTROL SYSTEM - COMPONENT LOCATIONS 1
EFFECTIVITY
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27-81-00-003
LE FLAP AND SLAT CONTROL SYSTEM - COMPONENT LOCATIONS 1
LE FLAP AND SLAT CONTROL SYSTEM - COMPONENT LOCATIONS 1
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-81-00-003
MLG Wheel Well Components
These are the components in the MLG wheel well:
* LE flap and slat control valve
* LE cruise depressurization valve
* LE standby shutoff valve
* LE flap and slat flow limiting valve
* LE flap and slat hydraulic fuses.
The LE flap and slat control valve is on the flap control unit on
the aft bulkhead. The LE standby shutoff valve is on the flight
controls module on the aft bulkhead. The flow limiting valve and
the LE standby hydraulic fuse are on the keel beam. The LE
cruise depressurization valve, and the extend and retract fuses
are on the ceiling.
LE FLAP AND SLAT CONTROL SYSTEM - COMPONENT LOCATIONS 2
EFFECTIVITY
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LE FLAP AND SLAT CONTROL SYSTEM - COMPONENT LOCATIONS 2
LE FLAP AND SLAT CONTROL SYSTEM - COMPONENT LOCATIONS 2
EFFECTIVITY
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27-81-00-004
Right Wing-to-Body Fairing Components
The LE UCM shutoff valve is in the right wing-to-body fairing,
forward of the main gear wheel well. To get access, open the
ram air inlet duct access panel.
Wing Components
These are the components on the wings:
* LE flaps and slats
* LE flap actuators
* LE slat actuators
* Slat main and auxiliary tracks.
To get access to the LE flap actuators, extend the LE flaps. To
get access to the LE slat actuators and tracks, go through
access panels under the wing.
LE FLAP AND SLAT CONTROL SYSTEM - COMPONENT LOCATIONS 3
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