Landing Gear

Question 1

What holds the gear in the up position on the CRJ 200

Answer 1

Mechanical Up Locks

Question 2

What locks the gear down on the CRJ 200

Answer 2

Locking mechanism in the main landing gear side strut actuators.

Question 3

What locks the gear down on the CRJ 700 / 900

Answer 3

Locking mechanisms in the main landing gear side stays

Question 4

What holds the gear in the up position on the CRJ 700 / 900

Answer 4

Mechanical Up Locks just as in the CRJ 200

Same for all 3 variants

Question 5

What holds the Nose Gear in the up position on the CRJ 700 / 900

Answer 5

Held up by an over center mechanism, this same mechanism also holds the nose gear in the down and locked position.

Question 6

What holds the Nose Gear in the down and locked position on the CRJ 700 / 900

Answer 6

The same over center mechanism that holds the gear in the up and locked position.

Question 7

What holds the nose gear in the up and locked position on the CRJ 200

Answer 7

The nose gear is held up by a mechanical up lock

Question 8

What holds the nose gear in the down and locked position on the CRJ 200

Answer 8

An over center locking mechanism.

Question 9

What stops the nose wheels from rotation when retracted on the CRJ 700 / 900

Answer 9

Brake Straps

Question 10

What is the can on the CRJ 700 / 900 main landing gear?

Answer 10

A shimmy damper

Question 11

What does the Red Handle Manual Release handle do when pulled on the CRJ 200

Answer 11

Mechanically releases the main landing gear and nose landing gear up locks as well as the nose gear forward door up lock

Question 12

How does Hydraulic System 2 interact with the landing gear system

Answer 12

Hydraulic System 2 assists the extension of the main landing gear in the down and locked position by powering the main landing gear auxiliary actuators.

Question 13

What does the Red Handle Manual Gear Release handle do when pulled on the CRJ 700 / 900

Answer 13

It is similar to the CRJ 200 except the nose gear is released when hydraulic system 2 pressure is directed to the nose landing gear manual release actuator.

Question 14

If you lose Hydraulic System 2 do you still have brakes?

Answer 14

Yes…. but only 50%

Question 15

If you lose Hydraulic System 2 and 3 do you still have breakes?

Answer 15

Yes… but only for 6 applications with the anti skid off due to the hydraulic accumulators.

Question 16

Is the anti skid available if you lose either System 2 or 3

Answer 16

Yes

Question 17

How is main wheel rotation stopped after gear retraction

Answer 17

Hydraulic pressure from the landing gear selector valve is directed to the brake control valves to stop wheel rotation.

Question 18

The Inboard brakes are powered by what Hydraulic System

Answer 18

Hydraulic System 3 powers the inboard brakes

Question 19

The outboard brakes are powered by what Hydraulic System

Answer 19

Hydraulic System 2 powers the outboard brakes

Question 20

Is the anti skid system active in the air?

Answer 20

Yes… it configures the anti skid control valves to full brake release to prevent wheel lock up on touch down.

Question 21

Anti skid is operational when??

Answer 21

When wheel speed >35 KTS or a weight on wheels + a 5 second delay. It is functional down to 10 KTS