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

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!

What protects the fuselage against excessive differential pressure?

Cabin altitude limiter.

Positive and negative pressure relief valves.

Trim air valves

Recirculation fans.

Correct! Wrong!

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

OFF.

ON.

AUTO.

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 destination airport altitude to the nearest 100 feet.

The departure airport altitude to the nearest 100 feet.

The alternate airport altitude to the nearest 50 feet.

The destination airport altitude to the nearest 500 feet.

Correct! Wrong!

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

False.

True.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

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.

1000 ft and 13 000 ft

2000 ft and 14 000 ft.

1000 ft and 15 000 ft.

Correct! Wrong!

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

APU bleed air - outflow valves.

Right pack - lower recirculation system.

Left pack - upper recirculation system.

Both packs - upper and lower recirculation systems.

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!

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

OFF.

AUTO or OFF

AUTO.

Correct! Wrong!

What will cause the automatic closure of a bleed valve?

APU operation

Bleed air overtemp or overpressure.

Ground cart supplying bleed air.

Engine fire switch pulled.

Correct! Wrong!

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

The aft equipment cooling and ventilating system provides cooling.

The forward system reconfigures automatically to an override mode.

The backup supply fan operates automatically.

The EICAS advisory message EQUIP COOLING is displayed.

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!

What system provides the heat for the forward cargo compartment?

Bleed air from the engines.

Aft cargo heat system.

Exhaust from the equipment cooling system.

The trim air system.

Correct! Wrong!

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

Four packs - controlling pressurization.

Two packs - cooling supplied hot bleed air.

Three packs - providing cooling.

One pack - managing ventilation.

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.

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

Correct! Wrong!

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

Pull the LDG ALT

Push the LDG ALT selector IN.

Select the FWD and AFT OUTFLOW valve switches to MAN.

Push the LDG ALT selector OUT.

Correct! Wrong!

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

Increase airflow through the pack.

Decrease airflow to half rate.

Shutoff the pack.

Fail the pack standby cooling controller.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

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

The pack valve is failed or closed.

Bleed air pressure is inadequate.

The PACK switched is pushed on.

A pack or compressor outlet high temperature has occurred.

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!

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 1000 ft.

Assumes a landing altitude of 2000 ft.

Assumes a landing altitude of 200 ft.

Assumes a landing altitude of 1500 ft.

Correct! Wrong!

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

In transit.

30 degrees open.

Full closed.

Full open.

Correct! Wrong!

What cabin differential pressure is scheduled for takeoff?

Slighlty positive.

Zero.

Slighlty negative.

Equal to the outside pressure.

Correct! Wrong!

What is bleed air used for?

Pressurizing the hydraulics reservoir and sspirating the TAT probe.

Pressurizing the hydraulics reservoir.

Aspirating the TAT probe.

Correct! Wrong!

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

Red light on the air synoptic.

No indication. Manual control is not displayed.

Green light on the outflow valve.

Amber 'M' on the outflow valve indications.

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 13000 feet above sea level.

2000 feet below to 12000 feet above sea level.

1000 feet below to 14000 feet above sea level.

Correct! Wrong!

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

Pack temperature would cause damage.

Recirculation fans may not cool equipment adequately.

Electronic Equipment and displays may fail.

AFT and BULK cargo compartments may overheat.

Correct! Wrong!

What must be done to manually set a landing altitude?

Press the AUTO button on the cabin altitude controller

Check the FMC for automatic landing elevation adjustment.

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

Adjust the trim air valves to the desired altitude.

Correct! Wrong!

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

Center trim air system.

Both right and left trim air systems.

Left trim air system.

Right trim air system.

Correct! Wrong!

What is the function of the negative pressure relief vents?

They minimize cabin overpressure conditions.

They improve smoke removal ventilation.

They prevent negative pressure differential.

They regulate cabin pressure during climb.

Correct! Wrong!

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

Position the landing altitude switch to AUTO.

Set cabin altitude to less than 8000 ft.

Advise maintenance of the open valve.

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

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, two, or three sequential steps.

Betwwen one and four sequential steps.

One or two 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.

What causes the trim air FAULT light to come on?

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

The pack flow control valves are commanded closed.

The trim air valve is commanded open

All statements are correct.

Correct! Wrong!

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

False.

True

Correct! Wrong!

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

Left trim air valve - monitored through the engine display.

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

Right trim air valve - monitored through the air synoptic.

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

Correct! Wrong!

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

AUTO.

ON.

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

OFF.

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.

False.

True.

Correct! Wrong!

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

14 000 ft.

13 500 ft

10 000 ft.

15 000 ft.

Correct! Wrong!

When does the ground crew call horn sound?

When cooling of forward electronic electrical equipment is inoperative.

When hydraulics systems are pressurized.

Before starting the engine.

In case of APU fire.

Correct! Wrong!

How are cargo compartments controlled in terms of temperature ranges?

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

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

Correct! Wrong!

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

33 000 ft.

37 000 ft.

35 000 ft.

39 000 ft.

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!

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

On the air synoptic.

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.

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!

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

Recirculation fans may not cool equipment adequately.

Pack temperature would cause damage.

AFT and BULK cargo compartments may overheat.

Equipment and displays could fail.

Correct! Wrong!

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

8000 feet.

9000 feet.

7400 feet.

9400 feet.

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!

What determines the pack outlet temperature?

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

The flight deck temperature selector.

All statements are correct.

The CABIN TEMERATURE selector.

Correct! Wrong!

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

False.

True.

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!

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.

1500 ft.

500 ft.

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).

True.

False.

Correct! Wrong!

Which of the followings are bleed air sources?

APU and Ground Cart.

Packs.

Demand pump.

Trim air.

Correct! Wrong!

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

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

The mode is selected automatically.

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.

Correct! Wrong!

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

To defog the forward windows.

To cool the equipment in the aisle stand.

To prevent smoke from entering the flight deck.

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.

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

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

Correct! Wrong!

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

APU.

Engine.

Ground cart(s)

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 both supply fans fail in flight.

When the FWD CARGO FIRE ARM switch is ARMED.

When the EQUIP COOLING switch is in OVRD.

Correct! Wrong!

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

It removes power from the trim air system.

It removes control at the cabin attendant panel.

It allows the trim air valve to operate manually.

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

Correct! Wrong!

The LANDING ALTITUDE advisory message indicates which of the following?

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

A landing was made to different altitude.

The preset landing altitude is not correct.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

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

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!

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!

When is the center bleed isolation valve open?

During single bleed source operation.

During descent.

During engine start.

During climb and descent.

Correct! Wrong!

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

The entire air conditioning system.

Trim air valves and recirculation fans.

Reciculation fan switches only.

Packs only.

Correct! Wrong!

How does the trim air system meet zone temperature requirements?

It heats conditioned air.

It cools or heats conditioned air.

It cools conditioned air.

It controls pack air temperature.

Correct! Wrong!

In flight, the cabin altitude controller operates in:

All statements are correct.

A cruise mode.

A descent mode.

A climb mode.

Correct! Wrong!

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

It opens the flight deck trim air valve.

The pack temperature decreases.

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

It cancels input to the flight deck temperature controller.

Correct! Wrong!

What happens when the BULK CARGO TEMPERATURE 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 15°C.

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

Correct! Wrong!

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

Left recirculation fan.

An independent bleed air heating system.

Forward equipment cooling exhaust air.

An electric heater.

Correct! Wrong!

Boeing B777 – Air Systems

Boeing B777 – Air Systems

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.

What protects the fuselage against excessive differential pressure?

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?

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

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

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.

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

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

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

What will cause the automatic closure of a bleed valve?

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

When is the pack OFF light illuminated amber?

What system provides the heat for the forward cargo compartment?

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

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

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

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

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

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

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

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:

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

What cabin differential pressure is scheduled for takeoff?

What is bleed air used for?

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

Which of the following are landing elevation limits for B777?

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

What must be done to manually set a landing altitude?

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

What is the function of the negative pressure relief vents?

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

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:

What causes the trim air FAULT light to come on?

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

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

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

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.

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

When does the ground crew call horn sound?

How are cargo compartments controlled in terms of temperature ranges?

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

What does the PACK MODE R EICAS message indicate?

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

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.

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

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

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

What determines the pack outlet temperature?

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

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.

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.

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).

Which of the followings are bleed air sources?

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

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

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

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

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

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

The LANDING ALTITUDE advisory message indicates which of the following?

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

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.

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

When is the center bleed isolation valve open?

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

How does the trim air system meet zone temperature requirements?

In flight, the cabin altitude controller operates in:

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

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

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

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.