Air Systems Flashcards
When does the equipment cooling configure for flight?
One or more engines on EACH WING is operating
On the ground, when is warm equipment cooling air ducted overboard?
- Engines not operating
- equipment cooling selector in NORM
- ambient temperature moderate or high
Equipment cooling provides cooling air for what compartment and systems
- Flight Deck Equipment
- Electrical and Equipment racks (E&E)
How can you manually configure the equipment cooling system for flight?
Positioning the equipment cooling selector to STBY
What is the function of the LOWER LOBE CARGO CONDITIONED AIR FLOW RATE SELECTOR?
Provides forward and aft cargo lobe conditioned air
What happens if a pack temperature controller (PTC) detects a fault in a pack channel?
Control of the respective pack switches to the other PTC
How many pack temperature controllers (PTC) are provided?
Two - A and B
On the 747-8 with Main Deck and FWD/AFT lower lobe temperature selector in the OFF position what is the temperature zone target?
68F/20C
747-8 the Nitrogen Generation System converts bleed air to nitrogen enriched air for what purpose?
Reduce flammability of center wing tank fuel.
On the 747-8, what does the alternate ventilation system provide with Pack 1+2+3 shutdown and the airplane depressurized?
Outside air into the flight deck
ON the 747-8, what position are the MAIN DECK FWD and AFT TEMP selectors normally placed in during preflight
OFF
On the 747-8, what position is the LOWER LOBE AFT CARGO HT selectors normally placed during preflight?
LOW
On the 747-8, the TEMP DEV CGO advisory message HI or LO respectively indicate?
HI - 9F/5C higher than selected temperature
LO - 9F/5C lower than selected temperature
The 747-8 LLACHS regulates temperature contorl valve to maintain at least __F/__C in LOW and ___F/____C in HIGH position?
40F/4C
50F/10C
The 747-8 ECS Left and Right Trim air is provided to which temperature zones?
LEFT TRIM AIR
-flight deck
-upper deck
-crew rest
-aft main deck
RIGHT TRIM AIR
-forward main deck
- forward lower lobe
- aft lower lobe
When in the descent mode, will the cabin altitude controllers program a positive or a negative pressurizaiton at touchdown
-Small positive pressurization at touchdown
What action would allow manual operation of the pressurization ssytem?
Turn both Outflow Manual switches to ON
-all automatic cabin altitude control functions are bypassed
When does the cabin altitude controller switch from controllers? (i.e. A to B)
-Automatically selects A or B on alternate flights
- Will switch automatically if the other fails
How many cabin altitude controllers are provided?
Two controllers A and B
- controller controls both outflow valves
How can you gain manual control of landing altitude?
By pushing the LDG ALT switch
What does the Zone System (SYS) Fault Light indicate? (3)
- Temperature zone duct overheat or zone temperature controller fault has occurred
- master 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 in the event of a bleed duct leak is detected?
- close the respective isolation valve
-close the 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 pressure regulating valve (PRV)
Prevents damage to ducting and equipment downstream by limiting bleed air pressure.
Under what conditions would Intermediate Pressure by used?
High power settings
With a right duct isolated, how will this affect the hydraulic systems?
- Hydraulic demand pump 4 is turned OFF
- No Hydraulic system 3 and 4 reservoir pressure
With the EICAS message STARTER CUTOUT 1,2,3,4 shown, will Nacelle anti-ice be available for the related engine?
NO
With a right duct isolated, how will the leading edge flaps extend?
The right wing LEF operate electrically in secondary mode
- EXPECT FLAPS PRIMARY EICAS
