Landing Gear Flashcards
The landing gear are normally controlled by the landing gear lever. On the ground, the lever is held in the DN position by an automatic lever lock. In flight, the lever lock is automatically released…
by a landing gear mechanical lock release.
when altitude is greater than 25 feet RA.
through air/ground sensing.
when groundspeed is greater than 100 knots.
through air/ground sensing.
After retraction, the landing gear are held up by…
electric locks.
hydraulic pressure to the up side of the actuator.
uplocks.
the gear doors.
uplocks
After retraction, the EICAS landing position indication changes to UP until the gear is subsequently extended.
True
False. The indication blanks after 10 seconds.
False. The indication blanks after 10 seconds.
The alternate landing gear extension system uses a dedicated DC powered electric hydraulic pump and center hydraulic system fluid to release all gear and door uplocks. The landing gear then _________________ to the down and locked position.
are hydraulically powered
are electrically driven
are electrically and hydraulically powered
free falls
free falls
Following an alternate extension, can the landing gear be retracted?
Yes, if center hydraulic system is operating
Yes, if right and left system hydraulic fluid is available
Yes, if normal electrical power is available
No, it is not possible to retract landing gear that has been extended using alternate extension.
Yes, if center hydraulic system is operating
The braking system is powered by…
the center hydraulic system.
the left and right hydraulic system.
115 Vac electric power and the center hydraulic system.
4 electric brake power supply units.
4 electric brake power supply units.
There are three marks on the tiller assembly. The center mark identifies the neutral position of the tiller, while the other two identify the maximum left and right displacements.
True
False
True
The alternate landing gear extension results in the landing gear free-falling to the down and locked position. The landing gear lever has no effect on landing gear alternate extension. Selecting DOWN on the ALTERNATE GEAR switch…
uses a dedicated DC powered electric hydraulic pump and center hydraulic system fluid to release all door and gear uplocks.
uses the C2 Electric motor-driven (EMP) demand pump to release the doors and gear uplocks.
uses electric motors to mechanically release the doors and gear uplocks.
uses the C1 electric motor-driven demand pumps (EMP) to release.
uses a dedicated DC powered electric hydraulic pump and center hydraulic system fluid to release all door and gear uplocks.
The brake system is…
electro-mechanical powered by four electric brake power supply units. It has four Electric Brake Actuator Controllers (EBACs) and thirty-two Electric Brake Actuators, four per wheel brake.
automatically selected to alternate if the normal system pressure is low.
powered by the right hydraulic system.
alternatively powered by the left hydraulic system.
electro-mechanical powered by four electric brake power supply units. It has four Electric Brake Actuator Controllers (EBACs) and thirty-two Electric Brake Actuators, four per wheel brake.
[] BRAKES advisory message on EICAS indicates…
an antiskid system fault has occurred.
two or more brakes are failed or a dragging brake has been detected.
the autobrake system is disarmed.
the parking brake is set.
two or more brakes are failed or a dragging brake has been detected.
Hydraulic power for gear retraction, extension and nosewheel steering is provided by the…
right hydraulic system only.
left hydraulic system only.
center hydraulic system only.
left and right hydraulic system.
center hydraulic system only.
Air/ground logic signals come from sensors located on…
the right main landing gear beam.
the nosewheel strut.
the left main landing gear beam.
each main landing gear beam.
each main landing gear beam
All active brakes are applied for a heavy brake application, landing rollout, RTO or when setting the parking brake. For all other manual brake applications, the brake control system applies one-half of the brakes on each main landing gear if the wheel speeds are less than…
70 knots.
10 knots.
V1.
30 knots.
70 knots.
The autobrake system provides automatic braking at 5 levels of preselected deceleration rates for landing. After landing, autobrake application begins when…
the nosewheel strut is compressed and main wheels have spun up.
the nosewheel strut is compressed and both thrust levers are near idle.
both thrust levers are retarded to idle and the wheels have spun up.
either thrust lever is retarded to idle and the main gear strut are compressed.
both thrust levers are retarded to idle and the wheels have spun up.
The parking brake system electric actuators are clamped in position during parking brake application. As brakes cool,
the aircraft is required to remain powered to maintain clamping force.
the parking brake needs to be reset after the initial application.
the parking brake system has a “park and adjust” feature which monitors the condition of the brakes after application and adjusts the clamping force as needed.
the brakes will remain set for 12 hours after application.
the parking brake system has a “park and adjust” feature which monitors the condition of the brakes after application and adjusts the clamping force as needed.
