Air Systems

Question 1

-When does equipment cooling configure for flight?

Answer 1

-one or more engines on each wing are operating OR
-selecting STBY (manually)

Question 2

On the ground, when is warm equipment cooling air ducted overboard?

Answer 2

-Engines not operating
-equipment cooling selector NORM
-ambient temperature moderate or high

Question 3

Equipment cooling provides cooling air for what compartment and systems?

Answer 3

FD Equipment
Electrical and Electronic Equipment Racks (E&E)

Question 4

What is the function of the lower lobe cargo air flow rate selector?

Answer 4

-Provides forward and aft cargo lobe conditioned air

Question 5

On the -8 with main deck and FWD/AFT lower lobe temperature selector OFF, what is the temperature zone target?

Answer 5

20degrees Celsius
68 degrees Fahrenheit

Question 6

On -8 What does the alternate ventilation system provide with pack 1,2&3 shutdown, and aircraft depressurized?

Answer 6

Outside air to the flight deck

Question 7

On -8what position are main deck FWD & AFT temp selectors normally placed during preflight?

Answer 7

OFF

Question 8

On -8 what position is the lower lobe aft cargo heat selector usually placed in during preflight?

Answer 8

LOW

Question 9

The -8 ECS Left and Right trim air is provided to which temperature zones?

Answer 9

Left: FD/UD/CR/Aft Main Deck
Right: Fwd Main Deck/ FWD&AFT Lower Lobe

Question 10

When in descent mode, will the cabin altitude controller program a slight positive or negative pressurization at touchdown?

Answer 10

A small positive pressurization at touchdown

Question 11

How many cabin altitude controllers are provided?

Answer 11

Two A&B. Each controller controls both outflow valves

Question 12

What does ZONE System (SYS) Fault light indicate?

Answer 12

-Temp zone duct overheat or zone temp controller fault
-Mater trim air valve failed closed
-Master trim air valve closed and pack air continues to flow

Question 13

Under what conditions would High Pressure (HP) air be used?

Answer 13

-Descent
-Other low power setting operations

Question 14

How would you isolate a bleed air duct section if a leak is detected?

Answer 14

*Follow the QRH
-Close respective isolation valve
-Close related engine bleed air valves

Question 15

What does a bleed duct isolation (ISLN) valve light indicate?

Answer 15

Isolation valve position disagrees with the switch position

Question 16

When bleed air pressure is available, the Engine Bleed Air Switches control which valves by system logic?

Answer 16

-PRV
-HP Bleed Valve
-Engine bleed air valve

Question 17

Describe the general function of the pressure regulating valve (PRV)

Answer 17

-Prevents damage to ducting and equipment down stream by limiting bleed air pressure

Question 18

With the right duct isolated, how will this affect hydraulic systems?

Answer 18

-Hyd demand pump 4 is turned off
-No Hyd system 3 & 4 reservoir pressure

Question 19

How can you manually configure equipment cooling system for flight?

Answer 19

Positioning the Equipment Cooling Selector to STBY