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

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

The aft equipment cooling and ventilating system provides cooling.

The EICAS advisory message EQUIP COOLING is displayed.

The forward system reconfigures automatically to an override mode.

The backup supply fan operates automatically.

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!

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.

1000 ft.

500 ft.

750 ft.

1500 ft.

Correct! Wrong!

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

It opens the flight deck trim air valve.

It cancels input to the flight deck temperature controller.

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

The pack temperature decreases.

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!

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

30 degrees open.

Full closed.

Full open.

In transit.

Correct! Wrong!

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

AUTO.

OFF.

ON.

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!

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

8000 feet.

7400 feet.

9400 feet.

9000 feet.

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.

One or two sequential steps

Betwwen one and four 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.

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.

AFT and BULK cargo compartments may overheat.

Equipment and displays could fail.

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?

Push the LDG ALT selector OUT.

Push the LDG ALT selector IN.

Pull the LDG ALT

Select the FWD and AFT OUTFLOW valve switches to MAN.

Correct! Wrong!

When is the center bleed isolation valve open?

During engine start.

During descent.

During climb and descent.

During single bleed source operation.

Correct! Wrong!

When is the pack OFF light illuminated amber?

All statements are true.

When the valve ıs failed closed.

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

During engine start.

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 OFF and LDG ALT selector pushed IN.

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

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

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 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.

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

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!

What will cause the automatic closure of a bleed valve?

Ground cart supplying bleed air.

Bleed air overtemp or overpressure.

APU operation

Engine fire switch pulled.

Correct! Wrong!

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

ON.

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

AUTO.

OFF.

Correct! Wrong!

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

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.

Packs operate at reduced flow rate.

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

Correct! Wrong!

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

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.

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

Correct! Wrong!

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

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

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.

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.

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

AFT and BULK cargo compartments may overheat.

Recirculation fans may not cool equipment adequately.

Electronic Equipment and displays may fail.

Pack temperature would cause damage.

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 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.

All statements are correct.

The trim air valve is commanded open

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.

False.

True.

Correct! Wrong!

What does the PACK MODE R EICAS message indicate?

The right pack is operating in the standby cooling mode.

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

The right pack is inoperative.

The standby cooling mode 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?

Increase airflow through the pack.

Shutoff the pack.

Fail the pack standby cooling controller.

Decrease airflow to half rate.

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!

How does the trim air system meet zone temperature requirements?

It heats conditioned air.

It cools or heats conditioned air.

It controls pack air temperature.

It cools conditioned air.

Correct! Wrong!

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

Bleed air pressure is inadequate.

The PACK switched is pushed on.

A pack or compressor outlet high temperature has occurred.

The pack valve is failed or closed.

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 air synoptic.

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

On the HYD synoptic.

Correct! Wrong!

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

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).

True.

False.

Correct! Wrong!

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

AUTO.

AUTO or OFF

OFF.

Correct! Wrong!

What protects the fuselage against excessive differential pressure?

Positive and negative pressure relief valves.

Recirculation fans.

Trim air valves

Cabin altitude limiter.

Correct! Wrong!

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

Three packs - providing cooling.

Four packs - controlling pressurization.

One pack - managing ventilation.

Two packs - cooling supplied hot bleed air.

Correct! Wrong!

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

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

The mode is selected automatically.

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

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

Correct! Wrong!

How are cargo compartments controlled in terms of temperature ranges?

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

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

Correct! Wrong!

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

To prevent cabin overheat during low altitude flight

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

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

To set the maximum temperature in any zone.

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!

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!

Which of the following are landing elevation limits for B777?

2000 feet below to 12000 feet above sea level.

2000 feet below to 13000 feet above sea level.

1000 feet below to 12000 feet above sea level.

1000 feet below to 14000 feet above sea level.

Correct! Wrong!

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

To cool the equipment in the aisle stand.

To prevent smoke from entering the flight deck.

To defog the forward windows.

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!

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!

What must be done to manually set a landing altitude?

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

Check the FMC for automatic landing elevation adjustment.

Press the AUTO button on the cabin altitude controller

Adjust the trim air valves to the desired altitude.

Correct! Wrong!

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

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.

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

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 temp. İs automatically kept approximately 7°C.

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

Correct! Wrong!

When does the ground crew call horn sound?

In case of APU fire.

When cooling of forward electronic electrical equipment is inoperative.

When hydraulics systems are pressurized.

Before starting the engine.

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 component can be reset by the air conditioning reset switch.

The entire air conditioning system.

Packs only.

Reciculation fan switches only.

Trim air valves and recirculation fans.

Correct! Wrong!

What cabin differential pressure is scheduled for takeoff?

Equal to the outside pressure.

Slighlty negative.

Slighlty positive.

Zero.

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 500 feet.

The destination airport altitude to the nearest 100 feet.

The departure airport altitude to the nearest 100 feet.

Correct! Wrong!

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

A constant pressure differential.

Airplane flight altitude.

Airplane flight altitude and pressure altitude.

Airplane climb rate and flight plan cruise altitude.

Correct! Wrong!

What system provides the heat for the forward cargo compartment?

Bleed air from the engines.

Aft cargo heat system.

The trim air system.

Exhaust from the equipment cooling system.

Correct! Wrong!

What is the function of the negative pressure relief vents?

They improve smoke removal ventilation.

They regulate cabin pressure during climb.

They minimize cabin overpressure conditions.

They prevent negative pressure differential.

Correct! Wrong!

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

Forward equipment cooling exhaust air.

An independent bleed air heating system.

An electric heater.

Left recirculation fan.

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.

2000 ft and 14 000 ft.

1000 ft and 13 000 ft

1000 ft and 15 000 ft.

Correct! Wrong!

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

False.

True.

Correct! Wrong!

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

Ground cart(s)

APU.

Engine.

Correct! Wrong!

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

Center trim air system.

Both right and left trim air systems.

Right trim air system.

Left trim air system.

Correct! Wrong!

What determines the pack outlet temperature?

The flight deck temperature selector.

The CABIN TEMERATURE selector.

All statements are correct.

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

Correct! Wrong!

Which of the followings are bleed air sources?

Trim air.

Packs.

Demand pump.

APU and Ground Cart.

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.

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.

33 000 ft.

35 000 ft.

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 1000 ft.

Assumes a landing altitude of 1500 ft.

Assumes a landing altitude of 2000 ft.

Correct! Wrong!

What is bleed air used for?

Aspirating the TAT probe.

Pressurizing the hydraulics reservoir.

Pressurizing the hydraulics reservoir and sspirating the TAT probe.

Correct! Wrong!

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

When both supply fans fail in flight.

When the EQUIP COOLING switch is in OVRD.

When high air airflow is detected in flight.

When the FWD CARGO FIRE ARM switch is ARMED.

Correct! Wrong!

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

Position the landing altitude switch to AUTO.

Advise maintenance of the open valve.

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

Set cabin altitude to less than 8000 ft.

Correct! Wrong!

Boeing B777 – Air Systems

Boeing B777 – Air Systems

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

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

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

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

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

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

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

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

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:

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

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

When is the center bleed isolation valve open?

When is the pack OFF light illuminated amber?

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

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.

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.

What will cause the automatic closure of a bleed valve?

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

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

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

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

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

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

The LANDING ALTITUDE advisory message indicates which of the following?

What causes the trim air FAULT light to come on?

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

What does the PACK MODE R EICAS message indicate?

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

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

How does the trim air system meet zone temperature requirements?

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

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

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

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).

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

What protects the fuselage against excessive differential pressure?

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

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

How are cargo compartments controlled in terms of temperature ranges?

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

In flight, the cabin altitude controller operates in:

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.

Which of the following are landing elevation limits for B777?

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

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

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.

What must be done to manually set a landing altitude?

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

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

When does the ground crew call horn sound?

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

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

What cabin differential pressure is scheduled for takeoff?

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?

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

What system provides the heat for the forward cargo compartment?

What is the function of the negative pressure relief vents?

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.

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

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

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

What determines the pack outlet temperature?

Which of the followings are bleed air sources?

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.

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

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 bleed air used for?

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

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

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.