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Fuselage door Status.
Volume 2 Flight Crew Operating Manual Rev 2A, Apr 11, 2005
LANDING GEAR
LGECU CONTROL SCHEMATIC
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual Volume 2
LANDING GEAR
LANDING GEAR CONTROL SYSTEM
The landing gear control panel is located on the centre pedestal. The landing gear control handle is located in the centre of the control panel and is equipped with a solenoid lock which prevents inadvertent up selection with the airplane on the ground (WOW) signal. In the event of a solenoid lock malfunction (in flight), a downlock release switch (DN LCK REL) on the landing gear control
panel permits up selection of the handle by overriding the solenoid lock.
LANDING GEAR CONTROL PANEL
NOSE WHEEL
STEERING Switch LANDING GEAR
ARMED . Circuit is set up for a command Handle Controls retraction and extension of the landing
gear by sending the
command signal to the
LGECU.
UP. Handle must be
pulled out to be moved to the UP position to retract the landing gear.
DN . Handle must be pulled out to be moved to the DN position to extend the landing gear.
HORN MUTED Switch
DOWN LOCK RELEASE
Mutes the landing gear warning horn for certain
(Spring loaded, solenoid activated)
airplane configurations. The "MUTED" white
Select and hold in the down position to manually override
legend will display when the switch is selected.
the control lever solenoid locking mechanism.
LANDING GEAR INDICATION
GF1510_009
In flight, the landing gear position indication (pop up display) is removed from EICAS 30 seconds after all landing gear and slats/flaps indicate up and lock, and no system faults (example: gear, spoilers, brakes, slat/flap) exist.
Gear Position (Flight Controls) Pop-Up
Up, down and in transit indication is displayed on the
EICAS primary page.
The pop.up display will appear when the airplane is
configured to any of the following:
Gear selected down.
Slat/flap selection.
Flight spoilers extended.
Volume 2
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
LANDING GEAR
LANDING GEAR POSITION AND WARNING SYSTEM
The status of the landing gears and landing gear bay doors is determined by the LGECU using inputs from various proximity sensors. The resulting output is sent to EICAS which monitors the condition and position display of each system.
The position of each of the three landing gears is pictorially indicated by three symbols on the EICAS display primary page. The gear up symbol for each gear is “UP”in white letters enclosed by a white outlined box. The gear in transit symbol for each gear is amber cross hatching enclosed by an amber outlined box. The gear down symbol for each gear is “DN”in white letters enclosed by a solid green circle.
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