LANDING GEAR

Question 1

What’s holding gear down and locked?

Answer 1

1) gravity

2) down lock springs

Question 2

What valve controls landing gear?

Answer 2

Landing gear electrovalve

Question 3

What valve holds nose gear doors?

Answer 3

Nose gear doors solenoid valve

Question 4

What’s holding gear up?

Answer 4

J-Hooks

Question 5

Whats LGEU?

Answer 5

Landing gear electronic unit

Question 6

What are the ways of extending learning gear?

Answer 6

1) Gear handle
2) Electric override button
3) Free fall lever

Question 7

Nose wheel landing light is operated when?

Answer 7

Gear down and locked

Question 8

What controls and operates landing gear system?

Answer 8

• electrically controlled

* hydraulically operated

Question 9

ICAS msg: LG AIR/GND FAIL means what?

Answer 9

LGEU cannot determine if aircraft is airborne or on ground. No brakes below 10 kts

Question 10

When will you get Landing Gear Warning?

Answer 10

Below 1200 ft RA and flaps 0-22° / low TLA)……. Flaps 45………….
RA failed / Low TLA

Question 11

1 Signal invalid
3 Signals valid

How many must agree?

Answer 11

2

Question 12

2 Signals valid
2 Signals invalid

How many must agree?

Answer 12

2

Question 13

What’s holding nose doors up / down?

Answer 13

Hydraulic pressure

Question 14

How many proximity switches are there?

Answer 14

5 ( 2 on each main and 1 on nose )

Question 15

If 4 valid signals, how many must agree?

Answer 15

3

Question 16

RA failed and TLA is low what happens?

Answer 16

Landing gear warning ( can be canceled )

Question 17

Gear retraction in-flight breaking is controlled by?

Answer 17

Mains: hydraulic system

Nose: mechanical stops ( metal )

Question 18

What stops landing gear from retracting on ground?

Answer 18

Mechanical lock ( Red button on gear handle )

Question 19

What are the functions of the nose gear proximity switch? (2)

Answer 19

1) steering

2) thrust reversers

Question 20

When is the only time you can cancel “Landing Gear Warning”?

Answer 20

In case Radio Altimeter loss Flaps 0-9

Canceled through the LDG cut out button