Air Systems Flashcards
-When does equipment cooling configure for flight?
-one or more engines on each wing are operating OR
-selecting STBY (manually)
On the ground, when is warm equipment cooling air ducted overboard?
-Engines not operating
-equipment cooling selector NORM
-ambient temperature moderate or high
Equipment cooling provides cooling air for what compartment and systems?
FD Equipment
Electrical and Electronic Equipment Racks (E&E)
What is the function of the lower lobe cargo air flow rate selector?
-Provides forward and aft cargo lobe conditioned air
On the -8 with main deck and FWD/AFT lower lobe temperature selector OFF, what is the temperature zone target?
20degrees Celsius
68 degrees Fahrenheit
On -8 What does the alternate ventilation system provide with pack 1,2&3 shutdown, and aircraft depressurized?
Outside air to the flight deck
On -8what position are main deck FWD & AFT temp selectors normally placed during preflight?
OFF
On -8 what position is the lower lobe aft cargo heat selector usually placed in during preflight?
LOW
The -8 ECS Left and Right trim air is provided to which temperature zones?
Left: FD/UD/CR/Aft Main Deck
Right: Fwd Main Deck/ FWD&AFT Lower Lobe
When in descent mode, will the cabin altitude controller program a slight positive or negative pressurization at touchdown?
A small positive pressurization at touchdown
How many cabin altitude controllers are provided?
Two A&B. Each controller controls both outflow valves
What does ZONE System (SYS) Fault light indicate?
-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
Under what conditions would High Pressure (HP) air be used?
-Descent
-Other low power setting operations
How would you isolate a bleed air duct section if a leak is detected?
*Follow the QRH
-Close respective isolation valve
-Close related engine bleed air valves
What does a bleed duct isolation (ISLN) valve light indicate?
Isolation valve position disagrees with the switch position
When bleed air pressure is available, the Engine Bleed Air Switches control which valves by system logic?
-PRV
-HP Bleed Valve
-Engine bleed air valve
Describe the general function of the pressure regulating valve (PRV)
-Prevents damage to ducting and equipment down stream by limiting bleed air pressure
With the right duct isolated, how will this affect hydraulic systems?
-Hyd demand pump 4 is turned off
-No Hyd system 3 & 4 reservoir pressure
How can you manually configure equipment cooling system for flight?
Positioning the Equipment Cooling Selector to STBY
