B777 Air Systems

Boeing 777 Air Systems

Boeing 777 Air Systems Revised 10/7/24

1 / 15

What does a PACK MODE R EICAS message indicate?

The pack will NOT operate in the standby cooling mode.

The standby cooling mode has failed.

The pack is operating in the standby cooling mode.

The airplane is in unfavorable conditions and pack output temperature is too high.

2 / 15

Where is the target temperature for the air conditioning zones displayed?

On the lower EICAS display when pressurization is selected to MAN.

On the upper EICAS display when pressurization is selected to MAN.

On the HYD synoptic

On the air synoptic.

3 / 15

What is the normal position of the forward outflow valve after landing?

Full closed.

Full open.

30 degrees open.

In transit.

4 / 15

What is the function of the negative pressure relief vents?

They prevent negative pressure differential.

They regulate cabin pressure during climb.

They minimize cabin overpressure conditions.

They improve smoke removal ventilation.

5 / 15

What does the PACK MODE R EICAS message indicate?

The right pack is inoperative.

The standby cooling mode is inoperative.

The right pack is operating in the standby cooling mode.

The airplane is in unfavorable conditions and right pack output temperature is too high.

6 / 15

How does the trim air system meet zoner temperature requirements?

It controls pack air temperature.

It cools conditioned air

It heats conditioned air.

7 / 15

What happens when the BULK CARGO TEMPERTURE selector is positioned to HIGH?

The compartment temperature is automatically kept at approximately 21°C.

The bulk cargo compartment ventilation fan operates continuously.

The compartment temperature is automatically kept at approximately 7°C.

8 / 15

Which are the bleed air sources?

Demand pump.

APU & ground cart.

Trim air.

Packs.

9 / 15

Which trim air valve can be moved directly by the flight crew, and how is it monitored?

Right trim air valve - monitored through the air synoptic.

Left trim air valve - monitored through the engine display.

Cabin trim air valve - monitored through the flight deck temperature selector.

Flight trim air valve - through a manual positions of the flight deck temperature selector.

10 / 15

What happens if the forward equipment cooling primary supply fan fails?

The backup supply fan operates automatically.

The forward system reconfigures automatically to an override mode.

The aft equipment cooling and ventilating system provides cooling.

The EICAS advisory message EQUIP COOLING is displayed.

11 / 15

Which of the following are landing elevation limits for B777?

1000 feet below to 12000 feet above sea level.

2000 feet below to 12000 feet above sea level.

1000 feet below to 14000 feet above sea level.

2000 feet below to 13000 feet above sea level.

12 / 15

During preflight, what position should the FWD and AFT OUTFLOW VALVE switches and LDG ALT selector be in?

OUTFLOW VALVE switches in OFF and LDG ALT selector pushed IN.

OUTFLOW VALVE switches in AUTO and LDG ALT selector pulled out.

OUTFLOW VALVE switches in MAN and LDG ALT selector pushed IN.

OUTFLOW VALVE switches in AUTO and LDG ALT selector pushed IN.

13 / 15

How many packs are there and what is their main function?

Three packs - providing cooling.

Two packs - cooling supplied hot bleed air.

One pack - managing ventilation.

Four packs - controlling pressurization.

14 / 15

If cruise altitude is unavailable from the FMC in AUTO, the cabin altitude controllers assume a cruise altitude of:

37 000 ft.

35 000 ft.

39 000 ft.

33 000 ft.

15 / 15

How are zone target temperatures selected, and what is the temperature range?

Automatically set by the system with a temperature range between 10°C and 40°C.

Manually set by the cabin crew with a temperature range between 0°C and 30°C.

Manually set by the flight crew with a temperature range between 18°C and 29°C.

Automatically adjusted based on the outside temperature with a temperature range between 15°C and 35°C.

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