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What system provides the heat for the forward cargo compartment?

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

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

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

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

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

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What is bleed air used for?

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

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

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

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What does the PACK MODE R EICAS message indicate?

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

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

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When does the ground crew call horn sound?

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

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

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

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

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

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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:

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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.

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

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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.

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

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What is the function of the negative pressure relief vents?

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

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What determines the pack outlet temperature?

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

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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.

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How does the trim air system meet zone temperature requirements?

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

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In flight, the cabin altitude controller operates in:

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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?

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

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

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

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When is the center bleed isolation valve open?

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

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

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

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

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

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What must be done to manually set a landing altitude?

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The LANDING ALTITUDE advisory message indicates which of the following?

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

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

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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.

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When is the pack OFF light illuminated amber?

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

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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:

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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.

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

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How are cargo compartments controlled in terms of temperature ranges?

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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.

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

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What causes the trim air FAULT light to come on?

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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.

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

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

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

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

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

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

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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).

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Which of the following are landing elevation limits for B777?

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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.

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What protects the fuselage against excessive differential pressure?

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

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What cabin differential pressure is scheduled for takeoff?

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Which of the followings are bleed air sources?

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

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What will cause the automatic closure of a bleed valve?

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

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Boeing B777 – Air Systems