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Light off : indicates landing gear is retracted and locked up with landing gear lever selected up.
Note: ▵ lights on the LDG GEAR indicator panel light up as long as the LGCIU 1 is electrically
supplied, except for the center landing gear, which may not light up, depending on the
LGCIU failure.
LDG GEAR INDICATOR PANEL
Applicable to: ,
Connected to LGCIU 1 which receives signals from proximity detectors.
UNLK light : illuminates red if the landing gear is not locked in selected position.
▹lights:illuminategreenifthelandinggearislockeddown.
Light off : indicates landing gear is retracted and locked up with landing gear lever selected up.
Note: ▵ lights on the LDG GEAR indicator panel light up as long as the LGCIU 1 is electrically
supplied.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
GEARS AND DOORS - CONTROLS AND INDICATORS
A330/A340 FLEET DSC-32-10-30 P 2/8
FCOM 19 AUG 10
LANDING GEAR SELECTOR LEVER
Applicable to:
A two-position selector lever provides electrical signals to the two LGCIUs, which control green
hydraulic supply by means of selector valves.
Upon selection of UP or DOWN, and provided the airspeed is below 280 knots :
‐ All landing gear doors open, then
‐ Landing gears move to the new selected position, then
‐ All doors close.
(1) L/G LEVER
UP : Landing gear retraction is selected.
During gear door opening, main gear wheels are automatically braked by the
normal braking system. The nose gear wheels are braked by a brake band in the
gear well.
DOWN : Landing gear extension is selected.
An interlock mechanism prevents unsafe retraction by locking the lever in the
DOWN position, when either :
‐ Both main landing gear bogies are not trailed (aircraft on ground), or
‐ The center landing gear shock absorber is not fully extended, or
‐ The nose landing gear shock absorber is not fully extended, and the nose
wheels are not in the center position.
When the landing gear is extended, the system remains pressurized (if green
hydraulic pressure is available).
(2) RED ARROW
The red arrow, and associated ECAM warnings come on red, if the landing gear is not
downlocked in landing configuration. (Refer to DSC-32-10-40 WARNINGS AND CAUTIONS).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
GEARS AND DOORS - CONTROLS AND INDICATORS
A330/A340 FLEET DSC-32-10-30 P 3/8
FCOM 19 AUG 10
LANDING GEAR SELECTOR LEVER
Applicable to: ,
A two-position selector lever provides electrical signals to the two LGCIUs, which control green
hydraulic supply by means of selector valves.
Upon selection of UP or DOWN, and provided the airspeed is below 280 knots :
‐ All landing gear doors open, then
‐ Landing gears move to the new selected position, then
‐ All doors close.
(1) L/G LEVER
UP : Landing gear retraction is selected.
During gear door opening, main gear wheels are automatically braked by the
normal braking system. The nose gear wheels are braked by a brake band in the
gear well.
DOWN : Landing gear extension is selected.
An interlock mechanism prevents unsafe retraction by locking the lever in the
DOWN position, when either :
Both main landing gear bogies are not ‐ trailed (aircraft on ground), or
‐ The nose landing gear shock absorber is not fully extended, and the nose
wheels are not in the center position.
When the landing gear is extended, the system remains pressurized (if green
hydraulic pressure is available).
(2) RED ARROW
The red arrow, and associated ECAM warnings come on red, if the landing gear is not
downlocked in landing configuration. (Refer to DSC-32-10-40 WARNINGS AND CAUTIONS).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
GEARS AND DOORS - CONTROLS AND INDICATORS
A330/A340 FLEET DSC-32-10-30 P 4/8
FCOM 19 AUG 10
GRAVITY EXTENSION
Applicable to: ALL
The landing gear gravity extension selectors are locked-toggle type selectors. The selectors are
connected by a link, so that both are operated simultaneously.
When the link is disconnected, each selector can be independently operated.
(1) LDG GEAR GRVTY EXTN sel
Each selector has three positions :
DOWN
(guarded)
: The two motorized actuators are electrically-powered to close the hydraulic
cut-off valve and to disengage door and gear uplocks which permit the nose, and
main gear to deploy by gravity and to automatically lock down.
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 3(96)
