Landing Gear Flashcards
During normal operations the landing gear system is _____ controlled and ______ actuated
Electrically controlled and hydraulically actuated
The _____ holds the main landing gear in the retracted position
Up lock
The three operations of the landing gear are:
Normal extension/retraction
Electrical override
Alternate gear extension
The down lock release button on the landing gear does what?
Releases the locking solenoid, allowing the landing gear to be retracted
The main brakes are ______ powered and _____ controlled
Electrically powered and hydraulically controlled
The anti-skid system prevents _____
The wheels from skidding when brakes are applied
(T/F) The emergency parking brake can provide braking without hydraulic pressure
True
Brake control module 1 (BCM 1) controls the ______ brakes
Brake control module 2 (BCM 2) controls the ______ brakes
BCM 1 Outboard brakes
BCM 2 Inboard brakes
Anti-skid protection is active when wheel speed is above __ kts
10 kts
(T/F) The pilots should tap the brakes after liftoff to stop the wheels from spinning before they’re retracted
False. The brakes will automatically apply pressure for 4 seconds to stop the wheels from spinning
(T/F) The brake system is depressurized during flight
True
The emergency parking brake can still be used even without hydraulic pressure. They actuate the brakes _____ and get hydraulic pressure from the _____.
The actuate the brakes mechanically and get hydraulic pressure from the accumulator
Brake temperature is green up to ____C. This means brakes are able to ______
251C
Absorb maximum kinetic energy
Brake temperatures appear amber from ____C to ____C. This means that _____
252C to 840C
Cooling is required
The BRK OVERHEAT _____ message will illuminate when the brake temperature has exceeded the normal operating range. This occurs at ____C
Caution message at 690C
If the brake temperature of ___C the _____ message LG TEMP EXCEEDANCE will illuminate. The only way to remove this message is to ____
750C
Advisory message
Power down the aircraft
The maximum steering angle using the hand wheel is ___ deg.
76 deg.
At taxi speeds from ___ - ___ kts the steering angle will be gradually reduced down to ___ deg.
40-100 kts will reduce the angle down to 7 deg.
Towing the aircraft is not allowed when:
The steering motor is pressurized
When operating in active mode
Or if any of the brakes are pressurized
STEER FAIL in ____ on EICAS means what?
Amber. Means that the steering system has failed and the nosewheel is going to free caster
LG NO DISPATCH in ____ on EICAS means what?
Amber. Means that the nose gear was over steered beyond limits and must be looked at by mx
LG LEVER DISAG in ____ on EICAS means what?
Red. Means that at least on landing gear position doesn’t match the switch position and has been that way for at least 20 seconds
LG NOSE DOOR OPEN in ____ on EICAS means what?
That either of the two nose gear doors didn’t close fully upon extension or retraction of the gear
The “LANDING GEAR” aural message can be heard when:
The gear is not down and the flaps are in a position of 5 or full
For flaps set to 1, 2, 3, or 4… Radio altimeter <700 AGL… Or TLA 45 deg or less (2 engines). Or TLA 59 deg or less (one engine)
(T/F) Pushing the LG WRN INHIB will permanently silence the gear alarm until the button is pushed again.
False. This will only silence the current alarm and will be reset when the message would normally go away.
