1.9 Landing Gear

Question 1

If the main hydraulic system fails, how can the landing gear be lowered? Can this be done from both cockpits?

Answer 1

• Using emergency hydraulic system through EMER LDG GR Handle
• No, only from the front.

Question 2

What is the purpose of the WOW Switch on each of the landing gear with regards to the landing gear?

Answer 2

To prevent inadvertent retraction on the ground.

Question 3

What is built in to determine the position of each of the landing gear legs?

Answer 3

Proximity sensors and microswitches sense when each leg is in the down and locked or up and locked position.

Question 4

What handle in the cockpit can be pulled if the main landing gear fails?

Answer 4

EMER LDG GR handle

Question 5

Is it possible to select the landing gear UP after pulling the EMER LDG GR handle?

Answer 5

No

Question 6

What captions are inhibited on the MFD and DWP after the EMER LDG GR handle has been operated?

Answer 6

HYDS

HYD EMERG

Question 7

On the LGCU, what does an illuminated red indicator show?

Answer 7

The corresponding leg is unlocked, somewhere between locked up and locked down

Question 8

On the LGCU, what does an illuminated green indicator show?

Answer 8

The corresponding leg is locked down

Question 9

On the LGCU, when the red and green indicators are both unlit (blank), what does this mean?

Answer 9

The corresponding leg is locked up

Question 10

What colour will be illuminated on the LGCU if the landing gear position sensors provide conflicting information and that the position of the gear is unknown?

Answer 10

Red and green indicators

Question 11

What does a red cross indicate?

Answer 11

Data not valid

Question 12

If emergency landing gear handle has been pulled and LDG GR handle is not in the down position, what indicators will show?

Answer 12

Three green and three red indicators on LGCU and three green squares on the MFD HYD page

Question 13

What frequency does the DN TONE transmit on ?

Answer 13

COMM 1