AIRPLANE
OPERATIONS
MANUAL
LANDING GEAR AND
BRAKES
REVISION 40
2-12-05
Page
7
Code
01
AOM-145/1114
EICAS MESSAGES
TYPE MESSAGE MEANING
WARNING LG/LEVER DISAGREE
fter 20 seconds of gear
command, at least one
landing gear is not in the
selected position.
fter 20 seconds of gear
command to the UP position,
once "NLG UP/DOOR OPN" is
displayed on EICAS.
LG AIR/GND FAIL (1)
LGEU failure, failure of two
weight-on-wheel proximity
switches, or nose weight-on-
wheel proximity switch in
disagreement with air/ground
system indication.
CAUTION
NLG UP/DOOR OPN
(if applicable)
Nose LG is locked up and
nose LG door is open.
NOTE: 1) If the message is displayed for about 3 or 5 seconds during
the landing gear extension only and extinguishes when the
landing gear is down and locked, it could be considered a
false indication and should be disregarded.
CONTROLS AND INDICATORS
LANDING GEAR CONTROL BOX
1 - LANDING GEAR LEVER
UP - Selects landing gear retraction.
DOWN - Selects landing gear extension.
2 - DOWNLOCK RELEASE BUTTON
− Mechanically releases the lever lock, allowing the landing gear
lever to be moved to the UP position when on the ground or in
case it cannot be moved to the UP position after takeoff.
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