AIR SYSTEMS Flashcards
When does the equipment cooling system configure for flight?
One or more engines on each wing is operating.
FCOM, VOL 2; 2.20.14
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)
FCOM, VOL 2; 2.20.14
How can you manually configure the equipment cooling system for flight?
Positioning the Equipment Cooling Selector to STBY
FCOM, VOL 2; 2.20.14
What is the function of the LOWER LOBE CARGO CONDITIONED AIR FLOW RATE Selector?
Provides forward and aft cargo lobe conditioned air.
FCOM, VOL 2; 2.20.7
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.
FCOM, VOL 2; 2.20.1
How many pack temperature controllers (PTC) are provided?
Two – A and B.
FCOM, VOL 2; 2.20.1
On the 747-8 with Main Deck and FWD/AFT lower lobe temperature selector
in the OFF position, what is the temperature zone target?
•68◦F/ 20◦C
FCOM 2 747-8; 2.10.11
747-8, the Nitrogen Generation System converts bleed air to
nitrogen enriched air for what purpose?
•Reduce flammability of center wing tank fuel
FCOM, VOL 2 747-8; 2.20.2
On the 747-8, what does the alternate ventilation system provide with
Pack 1+2+3 shutdown and the airplane depressurized?
•outside air to the flight deck
FCOM, VOL 2 747-8; 2.20.3
ON the 747-8, what position are the MAIN DECK FWD and AFT TEMP selectors normally placed in during preflight?
•OFF
FCOM, VOL 2 747-8; 2.20.7
ON the 747-8, what position is the LOWER LOBE AFT CARGO HT
selector normally placed in during preflight?
•LOW
FCOM, VOL 2 747-8; 2.20.7
On the 747-8, the TEMP DEV CGO advisory message HI or LO respectively indicate?
•HI :9◦F (5◦C) higher than selected temperature
•LO :9◦F (5◦C) lower than selected temperature
FCOM, VOL 2 747-8; 2.50.2
The 747-8 Lower Lobe Aft Cargo Heat Selector regulates temperature
control valve to maintain at least __◦F/ __ ◦C in LOW position and
__◦F/ __ ◦C in HIGH position ?
•40◦F/ 4◦C
•50◦F/ 10◦C
FCOM, VOL 2 747-8; 2.10.3
The 747-8 ECS Left and Right trim air is provided to which temperature zones?
Left trim air system
- flight deck
- upper deck
- crew rest
- aft Main deck
Right trim air system
- forward main deck
- forward lower lobe
- aft lower lobe
FCOM, VOL 2 747-8; 2.20.6
When in the descent mode, will the cabin altitude controllers program a positive or a negative pressurization at touchdown?
Small positive pressurization at touchdown.
FCOM, VOL 2; 2.30.2
What action would allow manual operation of the pressurization system?
Turn both Outflow Manual switches to ON
NB: All automatic cabin altitude control functions are bypassed.
FCOM, VOL 2; 2.10.13
When does the cabin altitude controller switch controllers(i.e. A to B)?
•Automatically selects A or B on alternate flights
•Will switch automatically if the other fails.
FCOM, VOL 2; 2.10.14
How many cabin altitude controllers are provided?
Two controllers A and B
NB:Each controller controls both outflow valves.
FCOM, VOL 2; 2.30.1
How can you gain manual control of the landing altitude?
By pushing the (LDG ALT) switch
Additional information
- landing altitude set by rotating Landing Altitude selector
- landing altitude followed by MAN displayed on primary EICAS
- the EICAS advisory message LANDING ALTITUDE is displayed
FCOM, VOL 2; 2.10.13
What does the Zone System (SYS) Fault Light indicate?
•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
FCOM, VOL 2; 2.10.5
Under what conditions would High Pressure (HP) air be used?
•Descent
•Other low power setting operations (taxi ops)
FCOM, VOL 2. 2.40.1
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
NB: This is a QRH procedure.
FCOM, VOL 2; 2.40.3/QRH 400FC 2.5
What does a bleed duct isolation (ISLN) VALVE light indicate?
Isolation valve position disagrees with switch position.
FCOM, VOL 2; 2.10.25
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
FCOM, VOL 2; 2.10.26
Describe the general function of pressure regulating valve (PRV):
Prevents damage to ducting and equipment downstream
by limiting bleed air pressure.
FCOM, VOL 2; 2.40.1
Under what conditions would Intermediate Pressure (IP) air be used?
High power setting operations.
FCOM, VOL 2; 2.40.1
With a right duct isolated, how will this affect the hydraulic systems?
•The hydraulic demand pump 4 is turned off
•No hydraulic system 3 and 4 reservoir pressure
NB: Note this is a QRH action.
QRH 2.4
With the EICAS message STARTER CUTOUT 1,2,3,4 shown,
will Nacelle anti-ice be available for the related engine?
No
NB: QRH action.
FCOM, VOL 2; 2.40.2 & QRH 7.29
With a right duct isolated, how will the affected leading edge flaps extend?
The right wing LEF operate electrically in secondary mode
NB: Expect EICAS message FLAPS PRIMARY
Extra time required for the LEF to deploy.
QRH 2.5
