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B737-700 NG Systems > Landing Gear & Brakes > Flashcards

Landing Gear & Brakes Flashcards

1
Q

How many air/ground sensors does the aircraft have?

A

6 total - 2 on each landing gear unit

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2
Q

PSEU

A

Proximity Switch Electronics Unit - receives info from the air/ground sensors and in turn helps control several aircraft systems/functions

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3
Q

The red indicator lights indicate that the landing gear is in disagreement with the ___________ position.

A

Landing gear lever

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4
Q

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.

A

idle, 800

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5
Q

Overcenter ________ and _________ locks hold the landing gear at full extension.

A

mechanical, hydraulic

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6
Q

___________ provides fluid for the landing gear system.

A

Hydraulic System A

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7
Q

Nose Wheel steering is normally powered by ________ and alternate powered by __________

A

Hydraulic System A, Hydraulic System B

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8
Q

T/F: Normally, hydraulic System B supplies the pressure for the brakes, and hydraulic System A supplies an alternate source.

A

True. (system A pressure is automatic if B fails)

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9
Q

T/F: Both autobrakes and antiskid are available when using the alternate braking system

A

False. Antiskid is available. Autobraking is inoperative

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10
Q

The hydraulic brake accumulator pre-charge pressure is…

A

1,000 psi

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11
Q

Hydraulic brake accumulator pressure can be found on the …

A

HYD BRAKE PRESSURE indicator on the right forward panel

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12
Q

T/F: The normal brake system provides antiskid protection to each individual main landing gear wheel.

A

True

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13
Q

T/F: Antskid protection is available even with the loss of both hydraulic systems

A

True

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14
Q

During a takeoff roll, the RTO mode (autobrake system) automatically applies maximum brake pressure when thrust levers are retarded to idle at or above ________

A

88 knots

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15
Q

T/F: autobraking is available for landing with the autobrake mode set to RTO

A

False

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16
Q

Parking brake hydraulic pressure ______ available when Hydraulic systems A & B are not pressurized

A

Is (via the brake accumulator)

17
Q

If any gear is Not down and locked, the landing gear warning horn will sound when

A
  1. Flaps greater than 25 regardless of thrust lever position
  2. Below 800’ RA, either thrust lever is set at idle thrust, and flaps 0-10 degrees
18
Q

Full movement of the nose wheel tiller can turn the nose wheel up to a maximum of _____ degrees in either direction

A

78

19
Q

The rudder pedals allow for how many degrees of nose wheel travel (in each direction)

A

7

20
Q

What are some of the systems that rely on the Proximity Switch Electronics Unit (PSEU)?

A

Landing Gear position indication & warning
Takeoff warning
Air/Ground Relays
Engine control
Stall Warning
Anti-Ice
Cabin pressuirzation

21
Q

T/F: The PSEU light will illuminate on the ground or in the air when there is a fault in the system.

A

False. It will illuminate on the ground only.

22
Q

The red landing gear indicator lights indicate that the _________ is in disagreement with the _____________ position

A

landing gear, landing gear lever

23
Q

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

A

True

24
Q

T/F: Hydraulic system A is used to extend the landing gear

A

True. Hydraulic system A release the gear uplocks to start the extension

25
Q

What does the nose wheel steering lockout pin do?

A

Depressurizes the nose wheel steering system allowing for airplane pushback without having to shut off the hydraulic systems

26
Q

Trapped hydraulic pressure in the ______________ can provide several braking applications or parking brake application should the normal & alternate brake systems loose pressure.

A

brake accumulator

27
Q

Hydraulic system ____ charges the brake accumulator to a normal operating pressure of __________

A

B; 3,000 psi (3,500 max psi)

28
Q

The Auto Brake system disarms and the AUTO BRAKE DISARM light illuminates during any of the following conditions:

A

Speed Brake lever moved to the DOWN detent
Manual braking is applied
The RTO position is selected for landing
The AUTO BRAKE selector is moved to the OFF position
Malfunction exists in the system
Thrust levers are advanced

B737-700 NG Systems (23 decks)

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