AIR SYSTEMS

Question 1

When does the equipment cooling system configure for flight?

Answer 1

One or more engines on each wing is operating.

FCOM, VOL 2; 2.20.14

Question 2

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

Answer 2

•Engines not operating
•Equipment cooling selector in NORM
•Ambient temperature moderate or high

Question 3

Equipment cooling provides cooling air for what compartment and systems?

Answer 3

•Flight deck equipment
•Electrical and equipment racks (E & E)

FCOM, VOL 2; 2.20.14

Question 4

How can you manually configure the equipment cooling system for flight?

Answer 4

Positioning the Equipment Cooling Selector to STBY

FCOM, VOL 2; 2.20.14

Question 5

What is the function of the LOWER LOBE CARGO CONDITIONED AIR FLOW RATE Selector?

Answer 5

Provides forward and aft cargo lobe conditioned air.

FCOM, VOL 2; 2.20.7

Question 6

What happens if a pack temperature controller (PTC) detects a fault in a pack channel?

Answer 6

Control of the respective pack switches to the other PTC.

FCOM, VOL 2; 2.20.1

Question 7

How many pack temperature controllers (PTC) are provided?

Answer 7

Two – A and B.

FCOM, VOL 2; 2.20.1

Question 8

On the 747-8 with Main Deck and FWD/AFT lower lobe temperature selector
in the OFF position, what is the temperature zone target?

Answer 8

•68◦F/ 20◦C

FCOM 2 747-8; 2.10.11

Question 9

747-8, the Nitrogen Generation System converts bleed air to
nitrogen enriched air for what purpose?

Answer 9

•Reduce flammability of center wing tank fuel

FCOM, VOL 2 747-8; 2.20.2

Question 10

On the 747-8, what does the alternate ventilation system provide with
Pack 1+2+3 shutdown and the airplane depressurized?

Answer 10

•outside air to the flight deck

FCOM, VOL 2 747-8; 2.20.3

Question 11

ON the 747-8, what position are the MAIN DECK FWD and AFT TEMP selectors normally placed in during preflight?

Answer 11

•OFF

FCOM, VOL 2 747-8; 2.20.7

Question 12

ON the 747-8, what position is the LOWER LOBE AFT CARGO HT
selector normally placed in during preflight?

Answer 12

•LOW

FCOM, VOL 2 747-8; 2.20.7

Question 13

On the 747-8, the TEMP DEV CGO advisory message HI or LO respectively indicate?

Answer 13

•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

Question 14

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 ?

Answer 14

•40◦F/ 4◦C
•50◦F/ 10◦C

FCOM, VOL 2 747-8; 2.10.3

Question 15

The 747-8 ECS Left and Right trim air is provided to which temperature zones?

Answer 15

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

Question 16

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

Answer 16

Small positive pressurization at touchdown.

FCOM, VOL 2; 2.30.2

Question 17

What action would allow manual operation of the pressurization system?

Answer 17

Turn both Outflow Manual switches to ON
NB: All automatic cabin altitude control functions are bypassed.

FCOM, VOL 2; 2.10.13

Question 18

When does the cabin altitude controller switch controllers(i.e. A to B)?

Answer 18

•Automatically selects A or B on alternate flights
•Will switch automatically if the other fails.

FCOM, VOL 2; 2.10.14

Question 19

How many cabin altitude controllers are provided?

Answer 19

Two controllers A and B
NB:Each controller controls both outflow valves.

FCOM, VOL 2; 2.30.1

Question 20

How can you gain manual control of the landing altitude?

Answer 20

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

Question 21

What does the Zone System (SYS) Fault Light indicate?

Answer 21

•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

Question 22

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

Answer 22

•Descent
•Other low power setting operations (taxi ops)

FCOM, VOL 2. 2.40.1

Question 23

How would you isolate a bleed air duct section in the event
of a bleed duct leak is detected?

Answer 23

•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

Question 24

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

Answer 24

Isolation valve position disagrees with switch position.

FCOM, VOL 2; 2.10.25

Question 25

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

Answer 25

•PRV
•HP Bleed Valve
•Engine Bleed Air Valve

FCOM, VOL 2; 2.10.26

Question 26

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

Answer 26

Prevents damage to ducting and equipment downstream
by limiting bleed air pressure.

FCOM, VOL 2; 2.40.1

Question 27

Under what conditions would Intermediate Pressure (IP) air be used?

Answer 27

High power setting operations.

FCOM, VOL 2; 2.40.1

Question 28

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

Answer 28

•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

Question 29

With the EICAS message STARTER CUTOUT 1,2,3,4 shown,
will Nacelle anti-ice be available for the related engine?

Answer 29

No
NB: QRH action.

FCOM, VOL 2; 2.40.2 & QRH 7.29

Question 30

With a right duct isolated, how will the affected leading edge flaps extend?

Answer 30

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