777 Landing Gear
by jerome meriweather
   

Left to ENG 1
Right to F/O's ND
Down to F/O's CDU

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Lock OVRD Switch Auto Brake Selector ALTN Gear Switch Landing Gear Lever GND PROX
777 Photo and/or Graphic Element
  

The Landing Gear is controlled by the Landing Gear lever which can only be in the UP or DN position; there is no OFF position. On the ground, the lever is held in the DN position by an automatic lever lock which can be manually overridden by the Lock OVRD switch.

When the Landing Gear lever is moved to UP, the Landing Gear doors open and the main gear wheels tilt to the retract position. During retraction, the EICAS displays a white crosshatch in-transit indication. After retraction, the hydraulic pressure is removed and the Landing Gear are held by uplocks. The EICAS landing gear position indication displays UP for 10 seconds.

When the Landing Gear lever is moved to DN, the landing gear doors open and the gear are unlocked. During extension:
  • EICAS displays white crosshatch in-transit indication
  • Gear free-fall to the down and locked position
  • Downlocks move hydraulically to locked position Hydraulically actuated gear doors close
  • Main gear trucks tilt to flight position
When all gears are down and locked, the EICAS gear position indication displays DOWN.

 

Ground Proximity
Landing Gear Lever
There is no Off position. The wheels or either UP or DN and locked.
Alternate Gear Switch
AutoBrake Selector
OverRide Switch
Lock OverRide Switch