Landing Gear Flashcards Preview

Boeing 757 Technical > Landing Gear > Flashcards

Flashcards in Landing Gear Deck (36):
1

Gear Disagree mean?

Gear position disagrees with lever

2

Max speed with gear down and extension and retraction?

270kias / 0.82

3

What does moving landing gear lever to off position do?

Removes hydraulic pressure from landing gear system

4

When does gear down lights illuminate?

When gear down and locked and gear doors have closed

5

How gear and doors help up?

By mechanical uplocks

6

Where are the tilt sensors?

On main landing gear

7

What does nose air/ground sensing send signals to? (2)

- Stall warning system
- Portions of warning and caution system

8

Can you take off if AIR/GND SYS or NOSE A/G SYS indicated on EICAS?

No

9

What system removes the landing gear lever lock airborne?

Tilt sensor

10

How is gear put in tilt position when lowered?

Hydraulically

11

How many degrees for NWS via rudder pedals?

7 deg

12

Tiller turns NWS up to how many deg?

65 deg

13

How NWS, flaps, slats, and LDG gear powered if left hyd sys fails?

Right system through PTU

14

How ALT Gear work?

Main battery bus DC powers dedication electric hydraulic pump to release uplocks and gear free falls (uses fluid within supply line)

15

Normal hyd sys for brakes?

Right

16

When does alternate brakes auto come on?

When right hyd sys press is low

17

What system does alt brakes use?

Left

18

When does brake source light illuminate?

When both normal and alt brakes sys pressures are low

19

When in alt brakes what happens when brake pedals pushed?

sends hyd pressure through the alternate anti-skid valves to the brakes

20

What brake systems does the autobrakes only work on?

Only the right systems of normal and reserve brakes (as anti-skid uses normal anti-skid valves, not alternate)

21

Can the parking brake use any of the brake systems?

Yes

22

What is min brake accumulator pre-charge pressure?

1000PSI

23

What system pressurises the brake accumulator?

Right hyd sys

24

How many brake applications can the accumulator provide?

several

25

What does AUTO BRAKES light mean?

Auto brakes either disarmed or inoperative

26

When does RTO engage?

- RTO selected
- Above 85kts
- Both thrust levers are retarded to idle

27

How disengage RTO braking once initiated? (4)

- aircraft stops
- speedbrake lever stowed
- manual braking
- move selector top off

28

Whats higher on a dry runway on landing? Man braking or Max Auto?

Manual braking

29

When do autobrakes engage on landing? (2)

- both levers are at idle
- wheels have spun up

30

How does autobrakes apply braking after touch down?

A small amount after touchdown, then scheduled amount once less than 1deg of pitch angle

31

How disengage autobrakes on landing? (4)

- man braking
- turn switch to off or disarm
- speed brake lever moved down
- throttles moved forward

32

Which brake systems have anti-skid?

All 3

33

Which wheels receive anti-skid pairing in alt system?

lateral pairs

34

Does normal/reserve system provide anti-skid for individual wheels?

Yes

35

What does BRAKE SOURCE light mean?

Both normal and alt systems pressures are low

36

DOORS light means?

A door is not closed