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set up for a command
input on the ground.
OFF − Nose wheel
steering will revert to
the freecaster
mode
of operation.
LANDING GEAR
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.
GF1510_009
NOSE STEER LDG GEAR
HORN PILOT
EVENT
MUTED
LANDING GEAR INDICATION
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) PopUp
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.
GF1510_010
GEAR
OUT
30
DN DN DN
ND
STAB
NU
NL RUDDER
LWD RWD
NR
TRIMS
7.2
AIL
LANDING GEAR
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
15−10−12
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.
A “GEAR DISAGREE” caution message is posted on the primary page if any of the following
conditions occur:
· Any one gear remains in transit for more than 28 seconds, the respective rectangle remains
amber.
· The position of at least one gear does not agree with landing gear control lever except during
normal transit.
· The landing gear control lever is left in the up position during manual extension.
An amber “NOSE DOOR” or “L−R MAIN GEAR DOOR” caution message will be posted on the
primary page if one of the following conditions exist:
· Any door indicates not closed for longer than 30 seconds during extension or retraction.
· Any door indicates not closed for more than one second at any other time.
If any one gear remains in transit for more than 28 seconds, the respective rectangle remains amber
and “GEAR DISAGREE” is posted on the primary page as a caution. The gear down, in transit and
disagree conditions are displayed as long as the condition exists. The gear “UP” display is removed
from the primary page 30 seconds after the flaps are retracted and brake temperatures are normal.
During normal extension and retraction, the landing gear will display an amber “GEAR DISAGREE”
message, if the gear does not indicate a locked position within 30 seconds of selection.
A continuous “GEAR” voice warning is sounded in the event a landing is attempted with any of the
landing gears not down and locked and the airplane is below 16,500 feet. For details on the aural
“GEAR” warning refer to page 03−10−25 LANDING CONFIGURATION WARNING.
LANDING GEAR
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
15−10−13
LANDING GEAR POSITION AND WARNING SYSTEM (CONT'D)
The LGECU of the landing gear system monitors all gear functions. Any deviation from the selected
gear configuration or failure of the uplocks or downlocks is annunciated on EICAS in the form of
visual and aural messages. The following are examples of the landing gear indicating that it is not in
its commanded state:
GEAR
UP UP
NOSE GEAR CAUTION
RIGHT MAIN GEAR CAUTION
GEAR WARNING INDICATION
Indicates that landing gear does not agree
with landing gear selector lever position. It
will be accompanied by a voice advisory
and a "GEAR DISAGREE" caution
GEAR message.
　
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