Landing Gear Flashcards
The 777 is equipped with …………… nose gear?
Conventional
Main landing gear is attached ?
To the wings
Which pair of wheels on each truck is steerable?
The aft
The main landing gear ………. for retraction & after extension
Tilt
Landing gear speed limitations?
270 kts or .82 Mach when the landing gear are down, & during extension & retraction
……………….. hydraulic system pressure opens & closes the heat doors
Centre.
It also retracts the nose & main landing gear.
Hydraulic pressure is removed after the landing gear & gear doors are up & locked.
Hydraulic pressure forces the landing gear into ………………… during retraction& unlocks the landing gear for ………………….
Mechanical locks, extension
One unlocked, the landing gear ………………………………….. Hydraulic pressure ………….. needed for the landing gear to extend
Free fall to the down position.
Is NOT
If the airplanes air/ground sensing system remains in ground mode, what can’t you do?
Cannot raise the landing gear
What unlocks the landing gear in any phase of flight?
The landing gear lever lock switch
If there’s no hydraulic pressure in the centre system, or when the gear hasn’t extended properly, how can you extend the gear?
Alternate gear extension
How does the alternate gear extension system work?
It uses an electrically powered hydraulic pump & centre hydraulic system fluid to unlock the landing gear & landing gear doors
When the Alternate Gear Extension has been used, what’s different about the sequencing?
Landing gear & gear doors extend without sequencing. The landing gear do not tilt.
When does the landing gear display extend to show all gear positions?
If the landing gear doesn’t extend in the normal transit time.
To activate the alternate gear switch you must push & hold the switch for at least …………..?
1 second