DB's SY 737 Landing Gear

Question 0

Landing Gear Indicator Lights - Extinguished (red)

Answer 0

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

Question 1

Landing Gear Indicator Lights - Illuminated (red)

Answer 1

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)

Question 2

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

Answer 2

Related LG is down and locked

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

Question 3

Landing Gear Indicator Lights - Extinguished (green)

Answer 3

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.

Question 4

LANDING GEAR lever

1. UP
2. OFF
3. DN

Answer 4

1. LG retract
2. Hydraulic pressure is removed from LG system
3. LG extend

Question 5

What does the Override Trigger on the LG lever do?

Answer 5

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

Question 6

Max LG operating speed

1. Extend
2. Retract

Answer 6

1. 270k-.82M

2. 235k

Question 7

Max LG extended speed

Answer 7

320k-.82M

Question 8

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

Answer 8

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

Question 9

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

1. Manually extend gear?
2. Normally extend gear?
3. Retract gear?

Answer 9

1. Yes, with the LG lever in any position
2. Yes, if hydraulic SYS A pressure is available
3. No.

Question 10

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

Answer 10

The associated LG uplock is released

Question 11

ANTISKID INOP light - Illuminated (Amber)

Answer 11

A system fault is detected by antiskid monitoring system

Question 12

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

Answer 12

Battery

Question 13

Hydraulic Brake Pressure indicator

1. Normal pressure?
2. Max pressure?
3. Normal precharge?

Answer 13

1. 3000 psi
2. 3500 psi
3. 1000 psi

Question 14

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

1. Rudder pedals are fully depressed
2. Tiller full deflection

Answer 14

1. 7°

2. 78°

Question 15

Which hydraulic system powers NWS switch

1. ALT
2. NORM

Answer 15

1. SYS B

2. SYS A

Question 16

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

Answer 16

79.6 ft

Question 17

If normal braking is lost, is

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

Answer 17

1. Yes

2. No

Question 18

What stops the wheels from rotating upon retraction:

1. Main wheels?
2. Nose wheel?

Answer 18

1. Brakes

2. Snubbers

Question 19

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

Answer 19

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

Question 20

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

Answer 20

Gravity and air loads

Question 21

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

Answer 21

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

Question 22

When is NWS normally available?

Answer 22

1. Nose gear down as compressed by aircraft weight

2. Lockout (bypass) pin not installed

Question 23

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?

Answer 23

Turn left 5°

Tiller overrides rudder pedal steering

Question 24

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

Answer 24

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

Question 25

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

Answer 25

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

Question 26

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

Answer 26

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

Question 27

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

Answer 27

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

Question 28

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

Answer 28

90 kts and idle thrust

Question 29

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

Answer 29

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

Question 30

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

Answer 30

1. Both forward thrust levers idle | 2. The main wheels spin-up

Question 31

What are the different ways to disarm autobrakes?

Answer 31

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

Question 32

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

Answer 32

ANTISKID INOP

Question 33

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

Answer 33

6 sensors located at 2 per landing gear