Landing Gear Flashcards
Whenthe landing gear is retracted, what holds the gear in the up and locked position?
Hydraulic pressure is removed and uplocks hold the gear up.
What occurs when the gear handle is placed to the DN position?
EICAS displays a 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
Howis the gear extended using the alternate gear extension?
An electrically driven hydraulic pump and trapped hydraulic fluid from the center system releases all uplocks on the gear and doors. Gear free fall to the down and locked position
Normal brake pressure is supplied from which Hydraulic system?
Right hydraulic system
When Normal Brake pressure is lost which hydraulic system provides brake pressure?
Center hydraulic system
Antiskid protection for the brakes is provided in which braking system?
Antiskid protection is provided in the normal and alternate brake hydraulic systems.
The normal brake hydraulic system provides each main gear wheel with individual antiskid protection.
Alternate/Reserve antiskid system provides tandem wheel pairs for the forward and middle axle wheels and the aft wheels have individual antiskid protection.
When the normal brake system is operating, what do autobrakes provide?
Automatic breaking at preselected deceleration rates for landing and maximum braking for rejected takeoff.
With loss of the normal, alternate/reserve brake systems, the accumulator provides brake pressure. How many applications will the accumulator provide?
Several brake applications or one parking brake application
The Autobrake system can be disarmed by what pilot actions?
Advancing either throttle after landing
Manual braking
Moving the speed brake lever to the DOWN detent
Selecting DISARM or OFF with the selector
Under what condition will the RTO position of the autobrakes apply maximum brake pressure when selected prior to takeoff?
Groundspeed is above 85 knots and both throttles are retarded to idle.
Autobrakes are disarmed under what system conditions?
ADIRU failure
Autobrake fault
Normal antiskid system fault
Loss of normal brake pressure
What indication does the pilot have that the parking brake is set?
PARKING BRAKE SET memo message on the upper EICAS screen
The parking brake is set when both brake pedals are pressed and the handle raised. How is the parking brake released?
The parking brake is released by pressing the pedals until the PARKING BRAKE lever releases.
When a brake is deactivated, the pilot can find it indicated where?
The word BRAKE appears on the landing gear synoptic next to the deactivated brake
What indicates antiskid faults?
Overheat condition of the indicated brake. Expect a solid amber box in conjunction with any reading 5.0 and greater.
