Flashcards in Landing Gear Deck (19):
How is the main landing gear held up & down?
Mechanical up & down locks
How is the nose gear held in the up & down position?
Over center mechanism
Do the forward nose gear doors remain open after normal extension?
How are the nose gear doors actuated?
What is the purpose of the brushes on the main wheel wells?
Where can we determine position of the landing gear?
Which component monitors position of up locks, down locks, & gear door position & WOW sensors?
PSEU (proximity sensing electronic unit)
What component ensures the gear handle cannot be moved to UP position on ground?
When can gear horn not be muted?
Both thrust levers idle &/or flaps >30 degrees
Which hydraulic system operates inboard brakes?
Which hydraulic system operates outboard brakes?
When does anti-skid operate?
Wheel spin up >=35 kts or WOW+5 seconds
What is nosewheel steering degree of travel limits with nose wheel steering ON?
8 degrees with rudder
80 degrees with tiller
At what speed does anti-skid control stop operating?
Wheel speed <=10 kts
During landing gear retraction, why is hydraulic pressure from nose landing gear up line routed to activate the brake control valves?
Stop main wheel rotation
Pulling the landing gear manual release handle will permit the main landing gear to extend & lock into position:
Using gravity & down lock assist actuator force from the No. 2 Hyd. system
If hyd. systems 2 & 3 fail, what emergency braking is available?
Brake accumulators in both hydraulic systems provide reserve pressure for 6 brake applications with anti-skid selected OFF
When parking brake applied while hydraulic systems off, will brakes hold for prolonged period?
Yes, only inboard brakes