CRJ 700 / 900 Differences

Question 1

How many pressure controllers on the CRJ 700 / 900

Answer 1

One CPC with triple redundancy and Two Safety Valves

Question 2

Bleed air for pressurization comes from what stage?

Answer 2

6th or 10th stage bleed air

Question 3

The bleed air for pressurization is regulated to what psi?

Answer 3

45 psi +/- 3 psi

Question 4

How many air conditioning system controllers

Answer 4

2 ACSC’s with 2 channels

Question 5

Single Pack Operations on the CRJ 700

Answer 5

FL310

Question 6

Single Pack Operations on the CRJ 900

Answer 6

FL250

Question 7

How much Ram Air is directed to the Cabin

Answer 7

30%

Question 8

How many outflow valves on the CRJ 700 / 900

Answer 8

Only 1 Outflow Valve with triple redundancy electric motors

Two safety valves

Question 9

What powers the thrust reversers on the CRJ 700 / 900

Answer 9

Hydraulic Actuators

Question 10

What powers the thrust reversers on the CRJ 200

Answer 10

14th stage bleed air

Question 11

Why are there no EMER STOW switches for the thrust reversers on the CRJ 700 / 900

Answer 11

Because they are controlled by the FADEC powering hydraulic actuators

Question 12

What happens if there is an inadvertent thrust reverser deployment on the CRJ 700 / 900

Answer 12

The FADEC signals the reverser to stow and automatically sets an idle RPM on the effected engine.

Question 13

Where does the APU receive it’s fuel from on the CRJ 700 / 900

Answer 13

The APU receives it’s fuel from the left collector tank on the CRJ 700 / 900

Question 14

APU may be used for engine starts on the CRJ 700 / 900 up to what altitude

Answer 14

FL 210

Question 15

APU may be used for ECS operations up to what altitude on the CRJ 700 / 900

Answer 15

FL 250

Question 16

The APU may be used continuously in flight due to an inoperative IDG up to what altitude on the CRJ 700 900 per the MEL

Answer 16

FL 320