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SCA > DB's SY 737 Landing Gear > Flashcards

DB's SY 737 Landing Gear Flashcards

0
Q

Landing Gear Indicator Lights - Extinguished (red)

A
  1. Landing gear is up and locked with landing gear lever UP or OFF
  2. Landing gear is down and locked with landing gear lever DN
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1
Q

Landing Gear Indicator Lights - Illuminated (red)

A
  1. Landing gear is not down and locked (with either or both forward thrust levers at idle, and below 800’ AGL)
  2. Related landing gear is in disagreement with LANDING GEAR lever position (in transit or unsafe)
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2
Q

Landing Gear Indicator Lights (above LG lever) - Illuminated (green)

A

Related LG is down and locked

Note: LG warning horn is deactivated with all LG down and locked

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3
Q

Landing Gear Indicator Lights - Extinguished (green)

A

Landing gear is not down and locked
Note: LG is down and locked as long as one green LG indicator light (center panel or overhead) for each gear is illuminated.

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4
Q

LANDING GEAR lever

  1. UP
  2. OFF
  3. DN
A
  1. LG retract
  2. Hydraulic pressure is removed from LG system
  3. LG extend
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5
Q

What does the Override Trigger on the LG lever do?

A

It allows LG lever to be raised, by bypassing the LG lever lock

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6
Q

Max LG operating speed

  1. Extend
  2. Retract
A
  1. 270k-.82M

2. 235k

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7
Q

Max LG extended speed

A

320k-.82M

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8
Q

Do the overhead LG lights simply repeat the same info as LG lights on the center panel?

A

No. They are a redundant but separate set of LG indicator circuits and lights.

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9
Q

With the manual gear extension door open is it possible to:

  1. Manually extend gear?
  2. Normally extend gear?
  3. Retract gear?
A
  1. Yes, with the LG lever in any position
  2. Yes, if hydraulic SYS A pressure is available
  3. No.
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10
Q

What happens when the manual gear extension handles are pulled to there limits?

A

The associated LG uplock is released

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11
Q

ANTISKID INOP light - Illuminated (Amber)

A

A system fault is detected by antiskid monitoring system

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12
Q

What is the power source for the Parking Brake Warning Light (red)?

A

Battery

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13
Q

Hydraulic Brake Pressure indicator

  1. Normal pressure?
  2. Max pressure?
  3. Normal precharge?
A
  1. 3000 psi
  2. 3500 psi
  3. 1000 psi
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14
Q

How many degrees of travel does the nose wheel turn when:

  1. Rudder pedals are fully depressed
  2. Tiller full deflection
A
  1. 7°

2. 78°

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15
Q

Which hydraulic system powers NWS switch

  1. ALT
  2. NORM
A
  1. SYS B

2. SYS A

16
Q

What is the minimum width of pavement needed to a 180° turn for 738 with scimitar winglets? (Widest turn in fleet)

A

79.6 ft

17
Q

If normal braking is lost, is

  1. Antiskid available to both brakes?
  2. Autobrake available?
A
  1. Yes

2. No

18
Q

What stops the wheels from rotating upon retraction:

  1. Main wheels?
  2. Nose wheel?
A
  1. Brakes

2. Snubbers

19
Q

During main gear retraction, what happens if a spinning tire with loose tread impacts a fitting in the wheel well ring opening?

A

That gear stops retracting and free falls back to the down position. The affected gear cannot be retracted until the fitting is replaced.

20
Q

During a manual gear extension after uplocks are released, what forces pull the gear down?

A

Gravity and air loads

21
Q

Following a manual gear extension, what steps should be done to normally retract the gear if desired?

A
  1. Close manual extension access door
  2. Move the LANDING GEAR lever to DN with hydraulic SYS A available
  3. Position LANDING GEAR lever to UP
22
Q

When is NWS normally available?

A
  1. Nose gear down as compressed by aircraft weight

2. Lockout (bypass) pin not installed

23
Q

While taxiing, if you were to command the nose wheel to turn right 5° via rudder pedal and left 5° via tiller, what will the nose wheel do?

A

Turn left 5°

Tiller overrides rudder pedal steering

24
Q

If both normal and alternate Brake system pressure is lost, do we have any braking capability left?

A

Probably, trapped hydraulic pressure in the Brake accumulator can still provide several braking applications or parking brake application.

25
Q

When operating on alternate brakes, is here any difference on how the antiskid system works?

A

Yes. Antiskid protection is applied to main landing gear wheel pairs instead of individual wheels.

26
Q

Is it normal for the AUTO BRAKE DISARM light to flash when selecting RTO?

A

Yes, the light illuminates for 1-2 secs and then extinguishes indicating that an auto self-test has been successfully accomplished.

27
Q

What are the conditions necessary to arm the RTO autobrake mode?

A
  1. On the ground
  2. Antiskid and autobrake systems operational
  3. AUTO BRAKE select switch to RTO
  4. Wheel speed less than 60kts
  5. Thrust levers idle
28
Q

What is the minimum wheel speed and thrust lever position required to activate RTO auto max braking?

A

90 kts and idle thrust

29
Q

What would the autobrake system do if you landed with RTO selected (not cycled through OFF)?

A

No automatic braking occurs and the AUTO BRAKE DISARM light illuminates 2 secs after touchdown.

30
Q

After landing with autobrakes selected, when does autobrake activation begin?

A
  1. Both forward thrust levers idle

2. The main wheels spin-up

31
Q

What are the different ways to disarm autobrakes?

A
  1. Selector switch to OFF (no DISARM light)
  2. Speed brake lever to down detent
  3. Advancing forward thrust lever(s), except during the first 3 secs after touchdown
  4. Applying manual brakes
32
Q

What light might illuminate if there is a fault in the parking brake system?

A

ANTISKID INOP

33
Q

Where does the Air/Ground sensor receive its signals from?

A

6 sensors located at 2 per landing gear

SCA (15 decks)

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