Landing Gear & Brakes Flashcards
How many air/ground sensors does the aircraft have?
6 total - 2 on each landing gear unit
PSEU
Proximity Switch Electronics Unit - receives info from the air/ground sensors and in turn helps control several aircraft systems/functions
The red indicator lights indicate that the landing gear is in disagreement with the ___________ position.
Landing gear lever
The red lights also illuminate when the landing gear is not down and locked, with either thrust lever at ____ and the aircraft below _____ feet AGL.
idle, 800
Overcenter ________ and _________ locks hold the landing gear at full extension.
mechanical, hydraulic
___________ provides fluid for the landing gear system.
Hydraulic System A
Nose Wheel steering is normally powered by ________ and alternate powered by __________
Hydraulic System A, Hydraulic System B
T/F: Normally, hydraulic System B supplies the pressure for the brakes, and hydraulic System A supplies an alternate source.
True. (system A pressure is automatic if B fails)
T/F: Both autobrakes and antiskid are available when using the alternate braking system
False. Antiskid is available. Autobraking is inoperative
The hydraulic brake accumulator pre-charge pressure is…
1,000 psi
Hydraulic brake accumulator pressure can be found on the …
HYD BRAKE PRESSURE indicator on the right forward panel
T/F: The normal brake system provides antiskid protection to each individual main landing gear wheel.
True
T/F: Antskid protection is available even with the loss of both hydraulic systems
True
During a takeoff roll, the RTO mode (autobrake system) automatically applies maximum brake pressure when thrust levers are retarded to idle at or above ________
88 knots
T/F: autobraking is available for landing with the autobrake mode set to RTO
False
Parking brake hydraulic pressure ______ available when Hydraulic systems A & B are not pressurized
Is (via the brake accumulator)
If any gear is Not down and locked, the landing gear warning horn will sound when
- Flaps greater than 25 regardless of thrust lever position
- Below 800’ RA, either thrust lever is set at idle thrust, and flaps 0-10 degrees
Full movement of the nose wheel tiller can turn the nose wheel up to a maximum of _____ degrees in either direction
78
The rudder pedals allow for how many degrees of nose wheel travel (in each direction)
7
What are some of the systems that rely on the Proximity Switch Electronics Unit (PSEU)?
Landing Gear position indication & warning
Takeoff warning
Air/Ground Relays
Engine control
Stall Warning
Anti-Ice
Cabin pressuirzation
T/F: The PSEU light will illuminate on the ground or in the air when there is a fault in the system.
False. It will illuminate on the ground only.
The red landing gear indicator lights indicate that the _________ is in disagreement with the _____________ position
landing gear, landing gear lever
T/F: The landing gear warning horn cannot be silenced by the Horn Cutout switch when the the flaps are greater than 10 Or when the aircraft is below 200 feet RA with the gear not down and locked
True
T/F: Hydraulic system A is used to extend the landing gear
True. Hydraulic system A release the gear uplocks to start the extension
