Landing gear

Question 1

How many weight on wheels proximity switches are there?

Answer 1

Five total, two on each main gear, and one on the nose gear.

Question 2

How is landing gear position determined?

Answer 2

Landing gear position is determined by for proximity sensors per landing gear

Question 3

How does the system avoid landing gear retraction on the ground ?

Answer 3

A mechanical device locks the landing gear lever in place

Question 4

How does pulling the free fall extension lever upwards release the landing gear?

Answer 4

It mechanically releases the uplock hooks

Question 5

How is each landing gear held in the up position?

Answer 5

Each landing gear is held in the up position by a mechanical uplock hook

Question 6

By what means are the landing gear operation actuated and controlled?

Answer 6

The landing gear are electrically controlled and hydraulically actuated

Question 7

How are the nose gear doors actuated?

Answer 7

Hydraulically

Question 8

When would you hear the landing gear warning message?

Answer 8

When the flaps are extended to 45 degrees, the radio altimeter is below 1200 feet and the Gear is not down and locked