Airbus A340 Series, Brochure

Page: 89 / 211

STL 472.502/90 Issue 6
A340 Landing Gear
6.3
Main features
• Conventional landing gear with single bogie nose gear,
an outer gear and a double bogie main landing gear,
with direct-action shock absorbers.
• The main landing gear is also provided with a shock
absorber extension/retraction system.
• The main gear retracts laterally ; nose and center gears
retract forward into the fuselage.
• Electrically controlled by two Landing Gear
Control/Interface Units (LGCIU) .
• Hydraulically actuated (Green system) with alternative
free-fall/spring downlock mode.
• Alternating use of both LGCIUs for each
retraction/extension cycle. Resetting the landing gear
control lever results in transition to the other LGCIU.
• Elimination of gear lever neutral position through
automatic depressurization of landing gear hydraulic
supply at speeds above 280 kt.
• Elimitation of microswitches by use of trouble-free
proximity detectors for position sensing.