757 Landing Gear Flashcards
Gear handle ____________ position depressurizes system
Off
NOSE/LEFT/RIGHT annunciators each have one __________ light and one __________ light
AC
DC
DOORS light indicates any gear door is not __________
Closed
GEAR light indicates disagreement between __________ and __________
Handle
Gear
__________ switch overrides gear handle lock solenoid
LOCK-OVRD
Alternate gear extension uses dedicated __________ to release gear unlocks
DC pump (power pack)
__________ are automatically selected with loss of right hydraulic system pressure (shuttle valve)
Alternate brakes
__________ anti-skid is applied in lateral pairs
Alternate brakes
With alternate brakes, __________are inop
Auto brakes
Auto brakes 1 through MAX AUTO based on __________
Rates of deceleration
Max AUTO braking is less effective than___________
Manual Braking
Auto Brakes activate based on __________ and __________
Wheel Spin Up
Thrust Levers Idle
An AUTO BRAKES light indicates that auto brakes are__________ or have been __________
INOP
Disarmed
Auto Brakes deactivate for what five items?
Fault in the system
Speed brake moved towards down position
Off or Disarmed selected
Toe brake
Accumulator gauge Amber band indicates __________
Nitrogen pre-charge
Accumulator Pressure above amber band provides several __________ and provides for ___________ use
Braking Applications
Parking Brake
Parking Brake light indicates ___________ only
Handle position
Brake source light indicates loss of __________ and __________ braking
Normal
Alternate
Reserve brakes switch activates right electric hydraulic pump, regardless of switch position and uses right reserve fluid to power the __________ brake system
Normal
What can be done to raise the landing gear after takeoff if the landing gear lever will not move to the up position?
Push LOCK OVRD then raise handle
Use QRH
What is the meaning of an illuminated landing gear disagree light?
Gear position disagrees with the lever position
Describe how the Alternate Gear Extension System operates
Fluid in the normal supply line is pressurized by a dedicated DC powered electric hydraulic pump to release the gear door and gear uplocks
Which lights may remain illuminated after performing the Alternate Gear Extension procedure
DOORS light
What is the meaning of an illuminated DOOR light?
A door is not closed
Which hydraulic system powers the Normal Brake System?
Right
What is the meaning of an illuminated brake temp light?
A wheel brake temperature is in high range (5 or above)
How is the alternate brake system activated?
Automatically with low right hydraulic system pressure. (There are no indications other than right hydraulic system pressure low)
Which hydraulic system powers the alternate brake system?
Left
What is the meaning of an illuminated Brake Source light?
Normal and Alternate Brake Hydraulic System pressure are low
What happens when the RESERVE BRAKES switch is pushed?
Right hydraulic system fluid is provided to the right hydraulic system electric pump. Pump pressure is then supplied to the normal brake system only
What is the purpose of the brake accumulator?
If normal and alternate brake hydraulic power is lost, the brake accumulator provide several brake applications
What does the Amber band on the Brake Pressure Gauge represent?
Accumulator precharge only. No brake pressure available in this range.
How do you conserve accumulator pressure when operating with only accumulator brakes?
Apply steady increasing pressure
Which Brake System have Anti-Skid capability?
Normal, Alternate, Reserve, Accumulator
(since the accumulator provides brake pressure through the normal brake system, it also has anti-skid capability
What is the meaning of an illuminated ANTI-SKID light?
Fault is detected in the anti skid system
What is the meaning of an illuminated AUTOBRAKE?
Autobrake system is faulted or is disarmed
Which brake systems can power the autobrake system?
Normal and Reserve brake systems
When are the autobrakes activated during a rejected takeoff?
On the ground, above 85 knots, and both thrust levers are retarded to idle.
What kind of braking capability is provided with the Autobrakes selected tomRTO?
Maximum braking pressure
Which has the greatest braking capability, MAX AUTO or full manual braking?
Full manual braking
When are the autobrakes applied during landing?
Wheel spin up after landing and both thrust levers at idle
When are autobrakes deactivated?
FSTOP
Fault (autobrake or anti skid) Speed brake Thrust lever Off selected Peddle brakes
What is the meaning of an illuminated AUTOBRAKES light?
Autobrakes are disarmed or inoperative
What happens when the landing gear wheels tilt?
Air ground sensing to give signals to airplane systems.
What sensing does the nose gear have?
When fully extended provides air and stall warnings
How long for normal gear retraction? What is the indication if not?
25 seconds
Amber gear disagree
Landing gear lever is unlocked for gear retraction by which gear?
Main gear
Which electrical bus provides the power to the electric motor for alternate gear extension?
Hot battery buss
Will alternate gear extension operate when left hydraulic reservoir is empty?
Yes, enough fluid in the lines
When are autobrakes activated?
When both thrust levers are at idle
Wheel spin up
Less than 1 degree pitch
RTO mode activates after what speed?
85 knots
How is alternate brake system activated?
Loss of the right hydraulic system pressure opens alternate source sector valve automatically
The autobrakes are armed for landing. When do the autobrakes actuate?
When both thrust levers are at idle
Wheel spin up
Wheel tilt is sensed
IRS pitch is less than or equal to 1 degree
Can the autobrakes bring the aircraft to a full stop?
Yes
Are the autobrakes available in the alternate brake system?
No
When does the landing gear lever lock permit movement of the gear lever to the up position?
When the main gear trucks tilt
What is the indication that the autobrake system is armed and functional?
The selector latches at the deceleration rate selected
