Boeing B777 – Air Systems - SmartCockpit - Airline training guides, Aviation, Operations, Safety

What action is required during preflight if the LANDING ALTITUDE EICAS message is displayed with the FWD and AFT OUTFLOW VALVE switches in AUTO?

Push the LDG ALT selector OUT.

Pull the LDG ALT

Push the LDG ALT selector IN.

Select the FWD and AFT OUTFLOW valve switches to MAN.

Correct! Wrong!

During normal bleed air operation, what position should the L, C, R ISLN BLEED AIR switches be in?

AUTO.

OFF.

ON.

L ISLN AUTO, R ISLN AUTO, C ISLN OFF.

Correct! Wrong!

How does the trim air system meet zone temperature requirements?

It heats conditioned air.

It controls pack air temperature.

It cools conditioned air.

It cools or heats conditioned air.

Correct! Wrong!

If a duct leak is detected, the system automatically isolates the leak. The EICAS caution message BLEED LEAK is displayed. The automatic isolation logic may include:

One or two sequential steps

Betwwen one and four sequential steps.

One, two, or three sequential steps.

Correct! Wrong!

During isolation, the ENGINE and/or APU bleed switch OFF lights and the ISOLATION switch CLOSED lights illuminate and extinguish as the repective valves close and open.

Landing altitude (normally provided by the FMC) can be manually set using the LANDING ALTITUDE selector. Landing field selection limits are _ below sea level to _ feet above sea level.

1500 ft and 16 000 ft.

2000 ft and 14 000 ft.

1000 ft and 15 000 ft.

1000 ft and 13 000 ft

Correct! Wrong!

What system provides the heat for the forward cargo compartment?

Exhaust from the equipment cooling system.

The trim air system.

Bleed air from the engines.

Aft cargo heat system.

Correct! Wrong!

With the CARGO TEMPERATURE selector set to LOW or HIGH, the respective cargo heat shutoff valve opens and the temperature control valve opens and closes to maintain the temperature in the compartment.

The lavatory/galley vent fans draw air across temperature sensors in each compartment.

The lavatory vent fans draw air across temperature sensors in each compartment. If both vent fans fail, cargo heat is still provided but at a low rate.

The lavatory/galley vent fans draw air across temperature sensors in each compartment. If both vent fans fail, cargo heat is not provided.

Correct! Wrong!

What does the MAN position on the FLT DECK TEMP control do?

It causes the packs to provide air at an average mid temperature range.

It allows the trim air valve to operate manually.

It removes control at the cabin attendant panel.

It removes power from the trim air system.

Correct! Wrong!

What is the most correct statement about the equipment cooling override mode?

The mode is selected automatically, the EICAS message EQUIP COOLING OVRD is displayed. There is a non normal procedure for this message.

The EICAS message EQUIP COOLING OVRD is displayed and there is a non normal procedure to be performed.

The mode is selected automatically, and the EICAS message EQUIP COOLING OVRD is displayed.

The mode is selected automatically.

Correct! Wrong!

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

Four packs - controlling pressurization.

Three packs - providing cooling.

One pack - managing ventilation.

Two packs - cooling supplied hot bleed air.

Correct! Wrong!

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

The compartment temp. İs automatically kept approximately 7°C.

The bulk cargo compartment ventilation fan operates continuously.

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

The compartment temperature is automatically kept at approximately 15°C.

Correct! Wrong!

If one pack is in standby cooling and the other pack is operating normally, the pack in standby cooling mode shuts down at lower altitudes and higher outside air temperatures when ambient conditions do not permit standby cooling.

True.

False.

Correct! Wrong!

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

37 000 ft.

39 000 ft.

35 000 ft.

33 000 ft.

Correct! Wrong!

What is the cabin altitude at maximum certified airplane operating altitude?

9400 feet.

7400 feet.

8000 feet.

9000 feet.

Correct! Wrong!

Forward Equipment Cooling system does not reconfigure automatically to override mode automatically for which of the following?

When high air airflow is detected in flight.

When the EQUIP COOLING switch is in OVRD.

When the FWD CARGO FIRE ARM switch is ARMED.

When both supply fans fail in flight.

Correct! Wrong!

Whic 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.

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

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

Left trim air valve - monitored through the engine display.

Correct! Wrong!

The controller uses ambient pressure and flight plan data from the FMC to calculate a cabin pressurization schedule. The schedule provides a comfortable cabin climb to cruise altitude.

True.

False.

Correct! Wrong!

Two outflow valves are installed: one forward and one aft. Normally, most of the outflow is through the forward outflow valve.

False.

True.

Correct! Wrong!

This improves ventilation and smoke removal. Cabin altitude and full ventilation rates can be maintained by either valve.

If a pack overheats or fails the pack shuts down and an air conditioning may be needed.

False.

True.

Correct! Wrong!

In flight, the normal source of bleed air for all systems except the engine anti-ice is the engine low stage compressor (at high power) or intermediate stage compressor (at low power).

False.

True.

Correct! Wrong!

What is the source of supplemental heat for the aft cargo compartment?

Left recirculation fan.

Forward equipment cooling exhaust air.

An independent bleed air heating system.

An electric heater.

Correct! Wrong!

For Boeing 777, the APU Bleed Air is available at all altitudes.

False.

True.

Correct! Wrong!

In flight, the cabin altitude controller operates in:

A cruise mode.

A climb mode.

All statements are correct.

A descent mode.

Correct! Wrong!

What must be done to manually set a landing altitude?

Adjust the trim air valves to the desired altitude.

Check the FMC for automatic landing elevation adjustment.

Pull the manual landing elevation selector out then set the required altitude.

Press the AUTO button on the cabin altitude controller

Correct! Wrong!

Which component can be reset by the air conditioning reset switch.

The entire air conditioning system.

Packs only.

Trim air valves and recirculation fans.

Reciculation fan switches only.

Correct! Wrong!

The aft and bulk cargo compartments have independent bleed air heating systems. An insulated curtain separates the two compartments.

False.

True.

Correct! Wrong!

The cabin altitude limiter closes both outflow valves if cabin altitude exceeds:

14 000 ft.

15 000 ft.

10 000 ft.

13 500 ft

Correct! Wrong!

What is the indication that an outflow valve is in manual control?

No indication. Manual control is not displayed.

Amber 'M' on the outflow valve indications.

Green light on the outflow valve.

Red light on the air synoptic.

Correct! Wrong!

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.

Correct! Wrong!

After engine start, what is the correct position for the L ENG and R ENG BLEED AIR switches?

OFF.

AUTO.

ON.

Correct! Wrong!

What landing altitude is displayed on the EICAS pressurization system indications when the airplane has traveled more than 400 miles or has passed the halfway point?

The alternate airport altitude to the nearest 50 feet.

The destination airport altitude to the nearest 100 feet.

The departure airport altitude to the nearest 100 feet.

The destination airport altitude to the nearest 500 feet.

Correct! Wrong!

What protects the fuselage against excessive differential pressure?

Recirculation fans.

Positive and negative pressure relief valves.

Trim air valves

Cabin altitude limiter.

Correct! Wrong!

Why should the CABIN TEMP control be set to mid position?

To allows ± 6˚C temperature range adjustment on cabin attendant panel.

To set the maximum temperature in any zone.

To prevent cabin overheat during low altitude flight

To set the actual temperature in cabin zones A-F.

Correct! Wrong!

When is the center bleed isolation valve open?

During climb and descent.

During engine start.

During descent.

During single bleed source operation.

Correct! Wrong!

If the cruise altitude is unavailable from the FMC in AUTO, the cabin altitude controllers assume a cruise altitude of 39,000 feet.

True.

False.

Correct! Wrong!

When does the ground crew call horn sound?

In case of APU fire.

When hydraulics systems are pressurized.

Before starting the engine.

When cooling of forward electronic electrical equipment is inoperative.

Correct! Wrong!

In the standby cooling mode, what will the pack automatically do if the airplane is not in an area of sufficient cooling?

Decrease airflow to half rate.

Fail the pack standby cooling controller.

Shutoff the pack.

Increase airflow through the pack.

Correct! Wrong!

Where does air to the cabin come from, and what are the additional sources?

Left pack - upper recirculation system.

APU bleed air - outflow valves.

Right pack - lower recirculation system.

Both packs - upper and lower recirculation systems.

Correct! Wrong!

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.

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

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

Correct! Wrong!

What is bleed air used for?

Aspirating the TAT probe.

Pressurizing the hydraulics reservoir and sspirating the TAT probe.

Pressurizing the hydraulics reservoir.

Correct! Wrong!

In the cabin altitude controller cruise mode, maximum cabin altitude is 8,000 feet. The cabin altitude controllers enter cabin altitude controller descent mode at T/D or at initial descent of approximately _____ from cruise altitude, regardless of T/D.

750 ft.

1000 ft.

500 ft.

1500 ft.

Correct! Wrong!

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

Full open.

30 degrees open.

Full closed.

In transit.

Correct! Wrong!

What will cause the automatic closure of a bleed valve?

Ground cart supplying bleed air.

Engine fire switch pulled.

APU operation

Bleed air overtemp or overpressure.

Correct! Wrong!

Each trim air system supplies three zone supply ducts, with the left trim air system also supplying the flight deck.

True.

False.

Correct! Wrong!

When does a visible orange lip indicate on a pressure relief valve?

Advise maintenance of the open valve.

Set cabin altitude to less than 8000 ft.

Position the landing altitude switch to AUTO.

No action is required. The valve is in its normally closed position.

Correct! Wrong!

During climb, what parameter(s) schedule cabin altitude?

Airplane climb rate and flight plan cruise altitude.

Airplane flight altitude.

A constant pressure differential.

Airplane flight altitude and pressure altitude.

Correct! Wrong!

Why should you minimize flight time at low altitude when the EQUIP COOLING OVRD message is displayed?

AFT and BULK cargo compartments may overheat.

Electronic Equipment and displays may fail.

Recirculation fans may not cool equipment adequately.

Pack temperature would cause damage.

Correct! Wrong!

Which of the following is false for the PACK Switch illuminating OFF?

A pack or compressor outlet high temperature has occurred.

The pack valve is failed or closed.

Bleed air pressure is inadequate.

The PACK switched is pushed on.

Correct! Wrong!

What does the PACK MODE R EICAS message indicate?

The right pack is operating in the standby cooling mode.

The standby cooling mode is inoperative

The right pack is inoperative.

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

Correct! Wrong!

What is the function of the negative pressure relief vents?

They minimize cabin overpressure conditions.

They prevent negative pressure differential.

They improve smoke removal ventilation.

They regulate cabin pressure during climb.

Correct! Wrong!

How are cargo compartments controlled in terms of temperature ranges?

Low is 0°C to 5°C - High is 15°C to 24°C

Low is 5°C to 10°C - High is 20°C to 25°C

Low is 4°C to 10°C - High is 18°C to 24°C

Low is 10°C to 15°C - High is 25°C to 30°C

Correct! Wrong!

Which of the followings are bleed air sources?

Trim air.

Packs.

Demand pump.

APU and Ground Cart.

Correct! Wrong!

During preflight, what position should the APU BLEED AIR switch be in?

AUTO or OFF

OFF.

AUTO.

Correct! Wrong!

If an overheat or other significant pack fault is detected, the pack shuts down automatically. An attempt to restore pack operation may not be made by pressing the AIR COND RESET switch.

True.

False.

Correct! Wrong!

Why does the flight deck receive air from the left pack at a higher pressure than the passenger cabin?

To prevent smoke from entering the flight deck.

To cool the equipment in the aisle stand.

To defog the forward windows.

Correct! Wrong!

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

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

On the HYD synoptic.

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

On the air synoptic.

Correct! Wrong!

What happens when you select the FWR CARGO A/C control to AUTO?

Packs operate at reduced flow rate.

The EICAS advisory message CARGO A/C FWD is displayed.

Pack flow rate is modulated to achieve a pack outlet temperature between 5 and 43°C.

The forward cargo heating system is shutoff and a selected temperature is displayed on the AIR synoptic.

Correct! Wrong!

What happens if the FLT DECK TEMP control is moved to the 'C' position?

It closes the trim air valve and lowers the flight deck temperature.

It opens the flight deck trim air valve.

It cancels input to the flight deck temperature controller.

The pack temperature decreases.

Correct! Wrong!

Flight Deck Temperature (FLT DECK TEMP) selector in mid position sets the temperature to approximately 75°F (24°C)

True

False.

Correct! Wrong!

If landing altitude is unavailable from the FMC (and not set in MAN), the EICAS advisory message LANDING ALT is displayed. The cabin altitude controller:

Assumes a landing altitude of 200 ft.

Assumes a landing altitude of 1500 ft.

Assumes a landing altitude of 1000 ft.

Assumes a landing altitude of 2000 ft.

Correct! Wrong!

When is the pack OFF light illuminated amber?

When the valve ıs failed closed.

During engine start.

When there is a pack or compressor outlet high temperature condition.

All statements are true.

Correct! Wrong!

Automatic ventilation of the Forward Cargo Compartment Air Conditioning System ensures that smoke and objectionable odors do not enter the flight deck or passenger cabin.

False.

True.

Correct! Wrong!

What causes the trim air FAULT light to come on?

All statements are correct.

The trim air valve is commanded closed because of a zone supply duct overheat.

The trim air valve is commanded open

The pack flow control valves are commanded closed.

Correct! Wrong!

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

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

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

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

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

Correct! Wrong!

Which system(s) supply trim air to the flight deck?

Both right and left trim air systems.

Center trim air system.

Left trim air system.

Right trim air system.

Correct! Wrong!

What cabin differential pressure is scheduled for takeoff?

Slighlty negative.

Slighlty positive.

Zero.

Equal to the outside pressure.

Correct! Wrong!

The LANDING ALTITUDE advisory message indicates which of the following?

A landing was made to different altitude.

The FMC does not supply a landing altitude or the landing altitude selector is pulled.

The preset landing altitude is not correct.

Correct! Wrong!

What determines the pack outlet temperature?

The temperature zone requiring the coolest temperature controls the pack outlet temperature.

The CABIN TEMERATURE selector.

All statements are correct.

The flight deck temperature selector.

Correct! Wrong!

What is the normal source of bleed air to start the second engine?

Ground cart(s)

APU.

Engine.

Correct! Wrong!

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

The forward system reconfigures automatically to an override mode.

The EICAS advisory message EQUIP COOLING is displayed.

The backup supply fan operates automatically.

The aft equipment cooling and ventilating system provides cooling.

Correct! Wrong!

Why should you minimize flight time at low altitude when the EQUIP COOLING OVRD message is displayed?

Recirculation fans may not cool equipment adequately.

AFT and BULK cargo compartments may overheat.

Equipment and displays could fail.

Pack temperature would cause damage.

Correct! Wrong!

Boeing B777 – Air Systems

Boeing B777 – Air Systems

What action is required during preflight if the LANDING ALTITUDE EICAS message is displayed with the FWD and AFT OUTFLOW VALVE switches in AUTO?

During normal bleed air operation, what position should the L, C, R ISLN BLEED AIR switches be in?

How does the trim air system meet zone temperature requirements?

If a duct leak is detected, the system automatically isolates the leak. The EICAS caution message BLEED LEAK is displayed. The automatic isolation logic may include:

Landing altitude (normally provided by the FMC) can be manually set using the LANDING ALTITUDE selector. Landing field selection limits are _____ below sea level to _____ feet above sea level.

What system provides the heat for the forward cargo compartment?

With the CARGO TEMPERATURE selector set to LOW or HIGH, the respective cargo heat shutoff valve opens and the temperature control valve opens and closes to maintain the temperature in the compartment.

What does the MAN position on the FLT DECK TEMP control do?

What is the most correct statement about the equipment cooling override mode?

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

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

If one pack is in standby cooling and the other pack is operating normally, the pack in standby cooling mode shuts down at lower altitudes and higher outside air temperatures when ambient conditions do not permit standby cooling.

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

What is the cabin altitude at maximum certified airplane operating altitude?

Forward Equipment Cooling system does not reconfigure automatically to override mode automatically for which of the following?

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

The controller uses ambient pressure and flight plan data from the FMC to calculate a cabin pressurization schedule. The schedule provides a comfortable cabin climb to cruise altitude.

Two outflow valves are installed: one forward and one aft. Normally, most of the outflow is through the forward outflow valve.

If a pack overheats or fails the pack shuts down and an air conditioning may be needed.

In flight, the normal source of bleed air for all systems except the engine anti-ice is the engine low stage compressor (at high power) or intermediate stage compressor (at low power).

What is the source of supplemental heat for the aft cargo compartment?

For Boeing 777, the APU Bleed Air is available at all altitudes.

In flight, the cabin altitude controller operates in:

What must be done to manually set a landing altitude?

Which component can be reset by the air conditioning reset switch.

The aft and bulk cargo compartments have independent bleed air heating systems. An insulated curtain separates the two compartments.

The cabin altitude limiter closes both outflow valves if cabin altitude exceeds:

What is the indication that an outflow valve is in manual control?

Which of the following are landing elevation limits for B777?

After engine start, what is the correct position for the L ENG and R ENG BLEED AIR switches?

What landing altitude is displayed on the EICAS pressurization system indications when the airplane has traveled more than 400 miles or has passed the halfway point?

What protects the fuselage against excessive differential pressure?

Why should the CABIN TEMP control be set to mid position?

When is the center bleed isolation valve open?

If the cruise altitude is unavailable from the FMC in AUTO, the cabin altitude controllers assume a cruise altitude of 39,000 feet.

When does the ground crew call horn sound?

In the standby cooling mode, what will the pack automatically do if the airplane is not in an area of sufficient cooling?

Where does air to the cabin come from, and what are the additional sources?

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

What is bleed air used for?

In the cabin altitude controller cruise mode, maximum cabin altitude is 8,000 feet. The cabin altitude controllers enter cabin altitude controller descent mode at T/D or at initial descent of approximately _____ from cruise altitude, regardless of T/D.

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

What will cause the automatic closure of a bleed valve?

Each trim air system supplies three zone supply ducts, with the left trim air system also supplying the flight deck.

When does a visible orange lip indicate on a pressure relief valve?

During climb, what parameter(s) schedule cabin altitude?

Why should you minimize flight time at low altitude when the EQUIP COOLING OVRD message is displayed?

Which of the following is false for the PACK Switch illuminating OFF?

What does the PACK MODE R EICAS message indicate?

What is the function of the negative pressure relief vents?

How are cargo compartments controlled in terms of temperature ranges?

Which of the followings are bleed air sources?

During preflight, what position should the APU BLEED AIR switch be in?

If an overheat or other significant pack fault is detected, the pack shuts down automatically. An attempt to restore pack operation may not be made by pressing the AIR COND RESET switch.

Why does the flight deck receive air from the left pack at a higher pressure than the passenger cabin?

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

What happens when you select the FWR CARGO A/C control to AUTO?

What happens if the FLT DECK TEMP control is moved to the 'C' position?

Flight Deck Temperature (FLT DECK TEMP) selector in mid position sets the temperature to approximately 75°F (24°C)

If landing altitude is unavailable from the FMC (and not set in MAN), the EICAS advisory message LANDING ALT is displayed. The cabin altitude controller:

When is the pack OFF light illuminated amber?

Automatic ventilation of the Forward Cargo Compartment Air Conditioning System ensures that smoke and objectionable odors do not enter the flight deck or passenger cabin.

What causes the trim air FAULT light to come on?

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

Which system(s) supply trim air to the flight deck?

What cabin differential pressure is scheduled for takeoff?

The LANDING ALTITUDE advisory message indicates which of the following?

What determines the pack outlet temperature?

What is the normal source of bleed air to start the second engine?

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

Why should you minimize flight time at low altitude when the EQUIP COOLING OVRD message is displayed?

Landing altitude (normally provided by the FMC) can be manually set using the LANDING ALTITUDE selector. Landing field selection limits are _ below sea level to _ feet above sea level.