Pneumatic

Question 1

Normal pressure differential?

Answer 1

8.5 psi

Question 2

Max pressure differential?

Answer 2

8.7 psi

Question 3

Max pressure differential during taxi, takeoff, & landing?

Answer 3

0.1 psi

Question 4

Max negative pressure differential?

Answer 4

-0.5 psi

Question 5

During single PACK ops, what is the ma altitude?

Answer 5

900/900EP - FL250

700 - FL310

Question 6

What does the DISPLAY COOL or ARINC COOL Caution messages mean?

Answer 6

Low airflow behind screens or within the avionics rack

Question 7

How many pressurization controllers (PC’s) in the 900?

Answer 7

2, PC1 & PC2

Question 8

When do the pressurization controllers swap?

Answer 8

WOW+3 minutes, or if one PC fails

Question 9

When in auto mode, what is the cabin rate of climb & descent?

Answer 9

+500 fpm

-300 fpm

Question 10

When in manual mode, what range is controlled by the MAN RATE knob?

Answer 10

50 - 3000 fpm

+/- 1000 fpm

Question 11

When will we get a CABIN ALT Caution message?

Answer 11

Cabin altitude between 8,500 to 10,000 ft

Question 12

When will we get a CABIN ALT Warning message?

Answer 12

Cabin altitude >10,000 ft

Question 13

When will CPAM auto deploy pax oxygen masks?

Answer 13

Cabin altitude >14,000 ft

Question 14

When will CPAM turn on NO SMOKING/FASTEN SEATBELT signs?

Answer 14

Cabin altitude >10,000 ft (switch in AUTO position)

Question 15

What causes FAULT portion of a PACK switchlight to illuminate?

Answer 15

Over pressure or Over temperature condition

Question 16

What causes FAULT portion of the PRESS CONT switchlight to illuminate?

Answer 16

Both pressurization controllers have failed

Question 17

ACSC’s

Answer 17

Air Conditioning System Controllers

Question 18

How many sections is the bleed air manifold separated into, and by what?

Answer 18

2, by the isolation valve

Question 19

What psi do the engine bleed valves regulate pressure to?

Answer 19

Regulate pressure to 45 psi +/- 3 psi

Question 20

When do the bleed air valves close?

Answer 20

• engines are shutdown
• ACSC signal is removed
• ENG FIRE PUSH switchlight to that engine
• manually on the BLEED AIR control panel

Question 21

When do the high pressure valves close?

Answer 21

• engines are shutdown
• ACSC signal is removed
• ENG FIRE PUSH switchlight to that engine
• manually on the HPV casing

Question 22

Do the LCV & bleed valves do the same thing?

Answer 22

Yes

Question 23

Which side of the bleed air manifold does the LCV deliver bleed air to when the ISOL valve is closed?

Answer 23

Left

Question 24

What can close the APU LCV?

Answer 24

• APU shutdown

- loss of ECU or ACSC

Question 25

How many ACSC's?

Answer 25

2 (ACSC1 for left eng/ACSC2 for right eng)

Question 26

Can the APU provide anti-ice?

Answer 26

No

Question 27

Does bleed air switch from the APU to engines in-flight automatically?

Answer 27

Yes

Question 28

How are bleed air leaks detected in the bleed air ducts & anti-ice ducts in the fuselage & wings?

Answer 28

Dual loops

Question 29

What is used to detect bleed air leaks in the cowl anti-ice ducts located in the engine pylons?

Answer 29

Pressure transducers

Question 30

Is there a test system for the bleed air leak detection system?

Answer 30

No

Question 31

Must both loops detect the high temperature?

Answer 31

Yes, unless one is inoperative

Question 32

AILC

Answer 32

Anti-Ice Leak-Detection Controller

Question 33

Where is the pneumatic system controlled from?

Answer 33

BLEED AIR control panel

Question 34

What pneumatic valves will close if the ENG FIRE PUSH switch is pressed?

Answer 34

BLEED VALVE & HPV

Question 35

What will close if the APU FIRE PUSH switch is pressed?

Answer 35

LCV