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United 737 > Landing Gear > Flashcards

Landing Gear Flashcards

1
Q

What is OFF position for for the landing gear?

A

Removes hydraulic pressure from the system.

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2
Q

The landing gear indicator lights indicate red when:

A

one or more of the gear is in disagreement with the lever or they are in transit. Lights also illuminate when the a/c is below 800’ AGL with the gear not down and locked and one or both thrust levers are retarded to IDLE.

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3
Q

The landing gear lights show green when:

A

gear is down and locked.

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4
Q

Where is there another set of gear indicator lights?

A

Aft overhead panel. They operate from separate circuits.

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5
Q

T/F: Only one light, either center panel or overhead panel needs to be lighted for a gear to be considered down and locked.

A

True

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6
Q

Landing gear ______ and ________, as well as _______, receive power from hyd sys A.

A

extension, retraction, nose wheel steering.

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7
Q

T/F: Autobrakes are available with both normal and alternate brakes.

A

False. Just normal.

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8
Q

When anti-skid is inop, what can’t you do for takeoff?

A

not able to use an assumed temperature reduced takeoff thrust takeoff.

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9
Q

How many air ground sensors are there?

A

6, 2 on each gear

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10
Q

On the _____, RTO mode is available.

A

ground

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11
Q

After touchdown, and once wheel speed is greater than 30 kts, an _________ landing mode may be selected.

A

autobrake

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12
Q

On the ground, the LANDING GEAR _____ solenoid is latched.

A

lever lock.

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13
Q

Flight locks(doors): when ___ or more entry /service doors are closed and either engine N2 RPM is greater than 50%, the flight locks become engaged.

A

3

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14
Q

Flight locks become disengaged on the ground when either thrust lever is less than _____.

A

53%.

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15
Q

Below 2000 feet RA the AT (provided armed) is available for a _______

A

go around

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16
Q

AT are disengaged ______after touchdown.

A

2 seconds

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17
Q

With an airborne cargo fire, the _______extinguisher bottle timer is enabled.

A

2nd

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18
Q

If sys B resivoir fluid is lost due to a leak downstream of the landing gear transfer unit, a sensor closes the LGTU and alternate steering is ________.

A

not available.

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19
Q

The plane must be ________ for nose wheel steering to be powered.

A

on the ground

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20
Q

Nose wheel tiller inputs can be rotated up to

A

+/- 78 degrees.

21
Q

Rudder pedals can supply steering control of up to

A

+/- 7 degrees

22
Q

When does nose wheel steering deactivate?

A

on takeoff as the nose wheel strut extends

23
Q

For aircraft _______ or ________ without having to depressurize the hydraulic systems, a lockout pin installed in the towing lever will depressurize nose wheel steering.

A

towing; pushback

24
Q

What hyd sys supplies pressure for the brake accumulator?

A

sys B

25
Q

T/F: anti-skid is available with both normal and alt brakes.

A

True

26
Q

What is the difference in anti-skid protection in normal vs alt?

A

Normal: anti skid for each individual wheel
Alternate: just wheel pairs.

27
Q

Brake systems provide protection from what?

A

Skid, locked wheel, touchdown, hydroplanning.

28
Q

T/F: Anti-skid is available with loss of both hyd systems

A

true

29
Q

What hyd system provides pressure for autobrakes?

A

Sys B

30
Q

When RO is selected, AUTO BRAKE DISARM light illuminates momentarily to indicate operation of the _______.

A

self test.

31
Q

How do you arm RTO mode

A 
on ground
anti-skid and autobrakes work
AUTO BRAKE switch in RTO
wheel speed less than 60 kts
thrust less than idle.
32
Q

If takeoff is rejected below 90 kts, autobraking will not start. The ___________ light will not illuminate and RTO remains aremed

A

AUTO BRAKE DISARM

33
Q

How is the RTO mode activated?

A

speed greater than 90 kts and thrust levers moved to IDLE.

34
Q

On a dry runway, _____ deceleration is not as great as _______braking.

A

MAX; full pedal

35
Q

If the crew does not terminate autobraking, the aircraft will_________.

A

come to a complete stop

36
Q

How are autobrakes disarmed?

A

speed brake lever moved to the down detent
one or both thrust levers advanced
manual brakes applied.

37
Q

T/F: the parking brake can be set with ________pressure

A

accumulator

38
Q

If a spinning tire with loose tread impacts a fitting in the wheel well ring opening,

A

retraction is stopped and the gear free falls back down.

39
Q

Main gear is held in the up position by ________.

A

mechanical uplocks

40
Q

if the left engine fails on takeoff, what happens with respect to the landing gear?

A

the landing gear transfer unit will use hyd sys B to supply the fluid volume req’d to ensure retraction of the gear at a normal rate.

41
Q

What 3 things bring the gear down?

A

Hydraulic pressure, gravity and air loads.

42
Q

What holds the landing gear down and locked?

A

overcenter mechanical and hydraulic locks

43
Q

If the Manual Extension Access door is open, what 3 things can happen?

A
  1. gear extension is possible with handle in any position
  2. normal gear extension is possible with hyd sys A
  3. landing gear retraction is disabled.
44
Q

What 3 things could cause the landing gear lever to not go to the up position?

A

Failure of:
air/ground system
ground spoiler bypass valve to close
landing gear lever lock solenoid.

45
Q

If the gear won’t come up, you should?

A

leave the gear down and retract the flaps on schedule. d

46
Q

If the cabin altitude/configuration warning horn sounds immediately after takeoff, what does this indicate?

A

a failure of the air/ground system or

failure of the ground spoiler bypass to close

47
Q

When is manual gear extension necessary?

A

any gear not down and locked with the gear lever down

or

gear lever becomes stuck at off

48
Q

For manual gear extension, when the last handle has been pulled, wait ______,then place the gear lever DN, if possible.

A

15 seconds

49
Q

Partial or full gear up configuration?

A

Flaps 40 and set VREF accordingly.

United 737 (25 decks)

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