Boeing B737 MAX - Air Systems
One PACK light illuminates on recall only. What does it indicate?
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If all Temperature Selectors are positioned OFF, the pack controls will cause the left pack to maintain a fixed temperature of ____ and the right pack to maintain ____ as measured at the pack temperature sensor.
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What is the position of the isolation valve when the ISOLATION VALVE switch is in AUTO?
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The right WING-BODY OVERHEAT light is illuminated, what area is affected?
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While taxiing in, the controller drives the outflow valve slowly to the full open position depressurizing the cabin.
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When does the amber DUAL BLEED Light illuminate?
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The recirculation fans:
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The amber DUAL BLEED light indicates a possible APU back pressure condition and thrust must be limited to IDLE.
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The motorized Exhaust valve:
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What systems need pneumatic power for operation?
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The 9th stage modulating and shut-off valve:
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When operating on the Standby Pack Controls, what temperatures will the packs be producing?
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The isolation valve is:
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APU bleed air used to start NO.1 engine is:
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A ZONE TEMP light may be reset by the trip reset switch on the Bleed Panel
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The DUAL BLEED light is illuminated. Engine thrust:
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Cabin altitude is normally rate-controlled by the cabin pressure controller up to a cabin altitude of ____ feet at the airplane maximum certified ceiling of ____feet.
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What happens when the WING BODY OVHT TEST switch is pressed?
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A DUCT OVERHEAT light only will cause:
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The ram air system deflector doors:
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The APU is capable of supplying bleed air for two packs on the ground, or one pack in flight.
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Where is the forward outflow valve located?
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When pressing Master Caution Recall the CONT CAB amber ZONE TEMP light illuminates.
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What is the primary source of conditioned air for the cockpit?
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The packs produce the coolest temperature selected in any of the zones, with the other zones temperature controlled by adding hot trim air to produce the required temperature.
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The wing-body overheat light comes on. What is the related master caution warning?
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If all zone controls and primary pack controls fail, the standby pack controlscommand the packs to produce air temperatures which will satisfy the averagetemperature demand of the two cabin zones. The trim air modulating valves will:
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Cabin air outflow is controlled by the outflow valve and the overboard exhaustvalve. A small amount is also exhausted through toilet and galley vents, miscellaneous fixed vents, and by seal leakage.
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When both the AUTO FAIL light and the ALTN light illuminate:
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During descent when the descent mode is activated:
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Where do the AUTO mode controllers receive their barometric information from?
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Conditioned air from the left hand pack flows directly to the flight deck from the Mix Manifold.
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The maximum differential pressure is:
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The altitude warning horn is:
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Zone Temperature Control - There are three zones: flight deck (CONT CAB), forward passenger cabin (FWD CAB) and aft passenger cabin (AFT CAB). Desired zone temperature is set by adjusting the individual Temperature Selectors. The selector range is approximately:
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Deflector doors are installed forward of the ram air inlet doors to prevent slush ingestion prior to liftoff and after touchdown. Deflector doors extend when activated:
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Illumination of the amber BLEED TRIP OFF light indicates what valve has automatically closed?
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In cruise the air conditioning ram air doors are:
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During preflight procedure the trim air switch is left in the OFF position and only one pack is selected ON for air conditioning. What is the consequence?
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Engine bleed air is obtained from:
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Illumination of the BLEED light indicates:
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An illuminated BLEED TRIP OFF light indicates:
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Where are the wing-body overheat sensors located?
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What is the flight level limitation for DISPATCH with one pack INOP?
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The TRIP RESET switch is pushed to reset a PACK, WING-BODY OVERHEAT and BLEED TRIP OFF, it isolates the associated valve and extinguishes the alert.
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Where are the bleed trip sensors installed?
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When will the descent mode be activated in the pressurization system?
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Due to a malfunction you are required to return to the airport of departure. To avoid the OFF SCHED DESCENT warning you reset the FLT ALT. What can you expect?
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The ram air system provides cooling air for the:
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Takeoff is allowed with Pack switches in HIGH, but landing is not permitted:
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What is the purpose of the recirculation fans?
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The cabin pressure controller controls cabin pressure in the following modes: AUTO (automatic) - ALT (alternate) - MAN (manual).
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What happens to engine fan air that is used to cool engine bleed air?
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The amount of fan air that is ducted through the pre-cooler is controlled by the:
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A leak in the APU Bleed Air Duct will be indicated by:
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How many Trim Air Pressure Regulators are there in the Air Conditioning system?
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The amber OFF SCHEDULE DESCENT light illuminates. What does it indicate?
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If a PACK light can be reset by the TRIP RESET switch then:
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In MANUAL pressurization mode the outflow is driven by?
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What are the causes of an amber AUTO FAIL light?
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How are the Engine Bleed Air valves powered?
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Given the scenario that the expected cruise level of FL310 was selected into the FLT ALT selector during preflight, but subsequently the aircraft climbed to FL390.
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If any individual zone is switched OFF, the Temperature Selector setting will be ignored by the temperature control system.
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Loss of airflow due to failure of an equipment cooling fan results in illumination of the related equipment cooling OFF light. Selecting the alternate fan should restore airflow and extinguish the OFF light within approximately _____.
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From where does the Cabin Auto Controller get its inputs.
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Overheat detection is provided by temperature sensors located:
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The AUTO mode is active. The amber AUTO FAIL light illuminates when:
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The cabin will automatically pressurize to 0.125 PSID on the ground when:
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The air data inertial reference units (ADIRUs) provides ambient static pressure,baro corrected altitude, non corrected altitude and calibrated airspeed to bothautomatic controllers. The ADIRUs receive barometric corrections from the Captain's and First Officer's BARO reference selectors. The automatic controllers also receive:
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Automatic switching to 'high air flow' occurs if both engine bleed air switches are OFF and the APU bleed air switch is ON, regardless of flap position, air-ground status or number of packs operating.
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The differential pressure of the cabin is limited by a pressure relief system - which of the following statements is correct?
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Water tank pressurisation in flight is normally provided by:
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Cruising at FL 370. The motorized Overboard Exhaust valve will open if:
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Duct pressure splits soon after landing.
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With a ground pneumatic source connected and the isolation valve switch selected to CLOSE.
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The recirculation fan system circulates air from the passenger cabin around thelining of the forward cargo compartment. When the overboard exhaust valve isclosed, exhaust air from the equipment cooling system is also diffused to the lining of the aft cargo compartment for additional inflight heating.
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Forward cargo compartment only.
The amber DUAL BLEED Light is illuminated before starting engines. What should you do?
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Engine bleed air pressure is controlled by means of the bleed air valve which acts as both a shutoff and pressure regulating valve.
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If all zone and primary pack controls fail, how is cabin temperatures controlled?
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What causes the amber PACK TRIP OFF Light to illuminate?
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The pneumatic duct pressure gauge:
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An amber AUTOFAIL indication will illuminate if one or more of the following conditions occur:
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Boeing 737 MAX – Air Systems