Oral & Systems

Question 0

While flying in cruise level, the fan has not come on. What will you do next?

Answer 0

Reference the QRH and then put the switch to FLIGHT ALT mode.

Question 1

What’s DC battery time limit with no AC power?

Answer 1

Five minutes.

The reason is that ED 1 and ED2 will be overheating. You need to get the fan going. (CPT) the fan that runs it, runs on AC power.

Question 2

If the system above is still not working, what is the next that?

Answer 2

Put it in STANDBY MODE.

Also make sure you check the QRH.

Question 3

Main battery and APU battery limits are:

Answer 3

24 V 17 amp hour main battery (FWD of the aircraft)

24 V 43 amp hour APU battery (AFT of the aircraft)

Question 4

In STANDBY MODE, what happens with the fan?

Answer 4

It de-energizes both fans and pulls air from the cockpit. By this time you should be looking for a place to land soon.

Question 5

On the electrical panel AVIAL/IN USE, what does AVIAL mean?

Answer 5

GPU has been connected and power is available.

Question 6

How many outflow valves does the CRJ 900 have?

Answer 6

One

Question 7

How is the outflow valve controlled?

Answer 7

The electrical system

Question 8

The CRJ 900 has TIE BUSES. How are the controlled?

Answer 8

They are automatic by the DC TC (DC power control)

Question 9

Name one place on the aircraft that requires fire detection and extinguishers.

Answer 9

To detection system. Engine core section as both protection and extinguisher capabilities.
Low-pressure turbine section as detection only.
Two FIREX bottles for extinguisher and engine fire.

The APU compartment has a dual loop detection.

Question 10

What will happen if the APU catches fire on the ground?

Answer 10

Auto shutdown and the bottle will deploy automatically (5 seconds)

Question 11

What will happen if the APU catches on fire in flight?

Answer 11

Auto shutdown, but the bottle will not deploy. Crew will have to deploy the bottle.

Question 12

Discuss the operation of the slats and flaps system on CRJ 900.

Answer 12

2 slat positions: 20° and 25°
When slat/flat lever is set to 1° or 8° slats will be 20°.
When slat/flap lever is set to 20°, 30°, or 45° position, the slats will be at 25°.
Remember that the slats extended down first before flaps.
On the retraction, the flaps come up before the slats.

Question 13

VFE limitation at 8°?

Answer 13

230 KTS

Question 14

If flaps are 8°, what will the slats be?

Answer 14

Slats 20°

Question 15

VFE at 20°

Answer 15

220 KTS.(slat25°/ flaps 20°)

Question 16

VFE 30°

Answer 16

185 kts (slats 25°/flaps 30*)

Question 17

VFE 45°?

Answer 17

170 kts (slats25°/flaps 45°)

Question 18

Emergency flap position?

Answer 18

Flaps 20° slats/25° in the event mechanical failure

Question 19

What happens to the ground lift dumping when you land on the runway?

Answer 19

The multifunction spoilers will deploy automatically

Question 20

How many spoilers are on the wings?

Answer 20

4 on each side. Multifunction and ground spoilers

Question 21

You nosewheel steering is on which hydraulic system?

Answer 21

Hydraulic # 3