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Click on the part of the letters or the cockpit below for the item you would like to learn more about. A / B / C / D / E / F / I / L / M / O / P / R / T / W / Z
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Air System Index
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Click on the part of the letters or the cockpit below for the item you would like to learn more about. A / B / C / D / E / F / I / L / M / O / P / R / T / W / Z
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Air Panel 1
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Cabin
Altimeter Differential Indicator
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Air Panel 2
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Cabin Rate Of Climb Indicator |
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Air Panel 3
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Air Temperature Indicator
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Air Panel 4
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Zone Temperature Light
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Air Panel 6
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Dual Bleed Light
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Air Panel 7
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Pack Switch
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Air Panel 8
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AUTO FAIL Light
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| Air Panel 9
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Landing Altitude
Indicator
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| Air Panel 10
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Equipment
Cooling Supply Switch
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_______________
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T1) The trip reset button resets the following trips Trip Reset Button resets these trips Bleed Trip Pack Trip Zone Trip
_______________ Air Conditioning/Pressurization Aspirated TAT Probe Wing and Engine Anti Ice Engine Start Hydraulic Reservoirs Pressurization Water Tank Pressurization
_______________ P1) A pack will go to high flow if? A pack will go to high flow if Bleed air switches are off and the APU is being used for air, with one pack on, then that pack will go to high flow. Normal bleed, one pack inop or off with the airplane in flight flaps up.
_______________ P2) Auto high flow is inhibited when? Auto high flow is inhibited on the ground or with flaps extended
_______________ C2) Zone temp control provides for a range of? Zone temp control provides for a range of 65 to 85 degrees
_______________ Z1) The packs supply air at what temperature for the zone system? The packs supply air at the temperature for the zone requiring the coldest air
_______________ Z2) A ZONE TEMP light indicates? A ZONE TEMP light indicates the air being supplied to that zone has overtemped, and the associated zone valve has closed. Trim air modulating valve closes (can be reset when it cools) It could also mean a CONT CAB failure of both the primary and backup controllers.
_______________ Z3) The left zone control provides primary control and backup control of which zone The left zone control provides primary control and backup control of following zones Primary, Aft cabin Backup, flight deck
_______________ Z4) The right zone control provides primary and backup control of which zones The right zone control provides primary and backup control of the following zones Primary, Fwd cabin, flight deck Backup, none
_______________ Z5) Failure of the primary flight deck zone will cause? Failure of the primary flight deck zone will cause auto switch to the backup (left side)
_______________ Z6) For the primary flight deck zone, how does one know a failure has occurred? For the primary flight deck zone, one know a failure has occurred by Illumination of the ZONE TEMP light upon Master Caution Recall
_______________ Z7) If both the flight deck primary and back up has failed how will that be displayed If both the flight deck primary and back up has failed how that will be displayed by Illumination of the ZONE TEMP light without regard to Master Caution Recall
_______________ Z8) Failure of the aft or fwd zone control will be displayed how? Failure of the aft or fwd zone control will be displayed by Illumination of the appropriate ZONE TEMP light upon Master Caution Recall
_______________ C1) During single pack operation how is temperature control via the zone regulators affected During single pack operations, the average of all three zones is the temperature produced.
_______________ C3) If all temp selectors are placed to off the packs will? If all temp selectors are placed to off the packs will maintain a fixed 75 degrees from the left pack and 65 degrees from the right
_______________ R2) In flight, if both packs are operating and if either pack is switched to high what happens? In flight, if both packs are operating and if either pack is switched to high, the left recirc fan shuts down.
_______________ R3) In flight if both packs are switched to high what happens? Both recirc fans shut down
_______________ R4) On the ground if both packs are in high flow what fan(s) operate On the ground if both packs are in high flow, the right recirc fan win operate only
_______________ R5) On the ground if only one pack is in high flow what fan(s) will operate? On the ground if only one pack is in high flow, the Right and left fans operate
_______________ A2) How many pressure relief valves are there? There are two pressure relief valves.
_______________ A1) At what pressure do the relief valves open? At 9.1 PSID the relief valves open
_______________ P2) The AUTO mode utilizes which electric motor? The AUTO mode utilizes the DC electric motor
_______________ A1) The ALTN mode utilizes which electric motor? The ALTN mode utilizes a DC electric motor
_______________ O1) The MAN mode utilizes which electric motor? The manual mode utilizes the DC electric motor.
_______________ A4) Static pressure to the auto controller is provided by? Static pressure to the auto controller is provided the ADIRU (air data inertial reference units)
_______________ C1) Baro corrections are provided by? Baro corrections are provided by the ADIRU’s through info from the altimeters
_______________ E1) The overboard exhaust valve normally is closed in flight except when? The overboard exhaust valve normally is closed in flight except when both pack switches are in high and the recirc fans are off.
_______________ P3) The auto mode has how many controllers? The auto mode has 2 controllers
_______________ P4) How does one select a new controller? A new controller is automatically switched with each new flight leg
_______________ F1) The cruise mode is entered when? The cruise mode is automatically entered within .25 PSID of cruise altitude
_______________ Normal differential Pressure is 7.45 up to 280 7.80 up to 370 8.35 above 370
_______________ L1) The descent mode is entered when the airplane is? The descent mode is automatically entered when the airplane is .25 PSID below cruise
_______________ A1) AUTO FAIL LIGHT indicates? AUTO FAIL LIGHT indicates? Loss of DC Power Controller Fault in the operational controller Excessive cabin rate (2000fpm) High cabin altitude (above 15,800) Dual controller failure when illuminated alone Single controller failure if ALTN also illuminated
_______________ A3) What happens to control with the AUTO FAIL light illuminated? Control is transferred to the ALTN mode with the AUTO FAIL light illuminated
_______________ A2) How can one extinguish the AUTO FAIL light? Moving the mode selector the ALTN mode extinguishes the AUTO FAIL light
_______________ O1) In the manual mode what bus powers the outflow valve? In the manual mode the DC bus powers the outflow valve
_______________ A1) What is the primary and secondary bleed air sources The primary and secondary bleed air sources are 5th and 9th stage bleed air
_______________ I1) What powers the isolation valve? AC powers the isolation valve
_______________ I2) When will the isolation valve automatically open? The isolation valve automatically openOpens if either engine bleed air or either pack switch is Off Not affected by APU bleed air switch Isolation Valve in Auto 4 corner switches on, valve closes. Otherwise it is open
_______________ D1) What does the DUAL BLEED light mean? DUAL BLEED light indicates the APU bleed valve is open and possible back pressure to APU is possibleLimit thrust to idle
_______________ A1) How many packs can the APU supply? The APU Can power 2 packs on ground or 1 in flight
_______________ P4) How many packs can the engines supply? Packs Do not operate 2 packs from one engine
_______________ P5) How does Pack Auto Switching work?Pack Auto Switching (One pack fails while other in auto) other goes to high flow in flt with flaps up Auto switching inhibited on gnd or in flt with flaps extended (Power for single engine ops) Auto switching occurs in all regimes, regardless of # of packs running, if APU is providing the bleed air
_______________ P6) What is the Max flow rate with APU Aircraft on ground? Max flow rate with APU Acft on gnd, APU bleed air switch on, 1 or 2 pack switches in HIGH (2 is highest)
_______________ R1) What does the Ram air system do? The Ram air system provides cooling for heat exchangers?
_______________ R2) When do the ram air doors move to full open? The ram air doors move to full open on ground or slow flight with flaps not fully retracted ram air door moves full open.Normal cruise door modulates between open and closed.
_______________ R3) What does the RAM DOOR FULL OPEN light mean? RAM DOOR FULL OPEN light indicates the ram door is fully open.
_______________ P7) How many Pack Temperature Controllers are there? Pack Temperature Controllers 2 per pack
_______________ A1)What happens if the primary pack temperature fails? If primary fails alternate from opposite pack controls automatically.
_______________ P2) How can you tell if a single pack controller has failed? With a single pack controller failure, Pack, Master Caution and Air Cond annunciator lights on during recall
_______________ P1) What does a PACK light mean? Two controller failures or pack tripoffPack, Master Caution and Air Cond annunciator lights on (not recall)
_______________ P3) What causes a Pack to trip? Pack operates unless high temps cause it to trip
_______________ A1) How do the Packs control the temperature? Packs All produce air at temp of coldest selectorTrim air heats up other two sectors
_______________ A2) How does the left and right electronic temp controller function? Left electronic temp controller Controls aft cabin and is backup for flt deckRight electronic controller Controls forward cabin and is primary for flt deck
_______________ A3) What happens in single pack operations? Single Pack Operations Pack output temperature is average of three controller temperaturesUnbalanced Pack (1 to 3 zones of trim air bad) Lt pack always controlled by flt deck temp controller position Right pack averages right two temp controller positions Exception is when cockpit controller is bad then right pack operates at coldest of rt two controllers
_______________ A4) What happens if only stby pack controllers are available? If only Standby Pack controllers are available, they operate at average of 2 cabin temp selectors
_______________ R1) What does the Recirculation fan do? Recirculation fan (two of them) Recirculates air from passenger cabin and electrical equip bay
_______________ E1) How does Equipment Bay cooling work? The Equipment Bay cooling works bySupply duct and exhaust duct each with normal and alt fan Alt selected manually when OFF light illuminates Supply duct cools cockpit instruments Exhaust duct takes air from cockpit, C/B area and E&E area and sends it to fwd cargo lining or overboard
_______________ A3) What altitude is the cabin controller trying to limit? The Cabin Controller is trying to limit cabin altitude to 8,000 ft at 41,000 ft
_______________ O1) What does the OFF SCHEDULED DESCENT indicate? The OFF SCHEULED DESCENT indicatesDescent initiated prior to reaching set cruise altitude Cabin descends to 300’ below departure airport alt If climb initiated reverts back to original mode
_______________ W1) What does the WING BODY OVERHEAT light mean? Left Light-Bleed air leak in lt engine strut, lt inbd wing leading edge, lt A/C bay, keel beam or APU bleed ductRight light- Bleed air duct leak in rt engine strut, rt inbd wg leading edge or rt A/C bay
_______________ B1) What does the BLEED TRIP OFF Light Mean? The BLEED TRIP OFF Light MeansHigh engine bleed air temp or pressure Related bleed air valve closes automatically
_______________ E1) What does an illuminated Equipment Cooling Supply Off Light mean An illuminated Equipment Cooling Supply Off Light means no airflow is coming from the selected supply fan.
_______________ D1) Where does the indicator read pressure The Duct Pressure Indicator reads the pressure from the left and right bleed air ducts.
_______________ E1) Will this switch open the valve when the engine is off? The Engine Bleed Air Switch will not open the valve when the engine is off.
_______________ W1) What does the Wing Body Overheat Test Switch do? The Wing Body Overheat Test Switch tests t.he Wing Body Overheat director Circuits
_______________ T1) What does the Trim Air Switch do when it is turned off? The Trim Air Switch when it is turned off signals air pressure regulating and shutoff valve closed seperating the left and right Air Conditioning Systems
_______________ M1) Illumination of both ALTN and AUTO FAIL lights indicates what? Illumination of both ALTN and AUTO FAIL lights indicates a single controller failure and automatic transfer to ALTN mode.
_______________ The selected cruise altitude.
_______________ E1) When the Switch is in ALTN, what happens? When the Switch is in ALTN the Alternate Cooling Supply Fan is activated
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A1) 2003 What is the function of the APU bleed switch? The function of the APU Bleed Switch is it connects APU bleed air to the left manifold.
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I1) 2003 If AC power is not available, can the isolation valve be opened? If AC power is not available, can the isolation valve cannot be opened?
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B1) 2003 What happens when a BLEED TRIP OFF light illuminates? When a BLEED TRIP OFF light illuminates, the respective engine bleed valve closes.
_______________ E1) 2003 What is the function of the bleed air switch? The function of the bleed air switch is to connect engine bleed air to the pneumatic manifold.
_______________ W1) 2003 What condition will illuminate a WING-BODY OVERHEAT light? A leak in the pneumatic system will illuminate a WING-BODY OVERHEAT light.
_______________ I2) 2003 What will occur if either a pack switch or engine bleed switch is positioned to OFF with the isolation switch in Auto? The isolation valve will open if either a pack switch or engine bleed switch is positioned to OFF with the isolation switch in Auto.
_______________ W2) 2003 When the right side WING-BODY OVERHEAT light illuminates, the correct crew action is to: When the right side WING-BODY OVERHEAT light illuminates, the correct crew action is to: Position the isolation valve switch to CLOSE and the respective pack and engine bleed switches to OFF.
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B2) 2003 During climbout, the amber BLEED TRIP OFF light illuminates. This means: During climbout, the amber BLEED TRIP OFF light illuminates. This means the bleed air temperature or pressure is excessive.
_______________ B3) 2003 Will the Illumination of the engine BLEED TRIP OFF light also automatically open the isolation valve? .Illumination of the engine BLEED TRIP OFF light not will automatically open the isolation valve.
_______________ D1) 2003 The amber DUAL BLEED light The amber DUAL BLEED light should illuminate when the APU is used to start the engines.
_______________ W2) 2003 Which areas are monitored by the left WING-BODY OVERHEAT light? The areas monitored by the left WING-BODY OVERHEAT light are the left engine strut, left inboard wing leading edge, left air conditioning bay, keel beam and bleed duct from APU.
_______________ E2) 2003 What are the primary and secondary stages of engine bleed air that supply the bleed air system? The 5th is the primary stage and the 9th is the secondary stage of engine bleed air that supply the bleed air system.
_______________ A2) 2003 What is the maximum altitude for using the APU as a pneumatic source? 17,000 feet is the maximum altitude for using the APU as a pneumatic source.
_______________ I3) 2003 With the isolation valve switch in AUTO, the isolation valve automatically closes when With the isolation valve switch in AUTO, the isolation valve automatically closes when both pack and engine bleed switches are ON.
_______________ T1) 2003 What fault(s) cannot be reset with the TRIP RESET switch? WING-BODY OVERHEAT cannot be reset with the TRIP RESET switch.
_______________ D1) 2003 Will the amber DUAL BLEED light illuminate whenever the APU bleed air valve is OPEN and the No. 1 engine bleed switch is ON? The amber DUAL BLEED light will illuminate whenever the APU bleed air valve is OPEN and the No. 1 engine bleed switch is ON.
_______________ D1) 2003 After a bleed trip has been reset, what cockpit indication confirms that the engine bleed valve has opened? After a bleed trip has been reset, the respective duct pressure increase confirms that the engine bleed valve has opened?
_______________ W3) 2003 Will the illumination of the amber WING-BODY OVERHEAT light will automatically close the respective engine bleed valve? Illumination of the amber WING-BODY OVERHEAT light will not automatically close the respective engine bleed valve.
_______________ W4) 2003 Are the WING-BODY OVERHEAT lights located on the forward overhead panel? The WING-BODY OVERHEAT lights are located on the forward overhead panel.
_______________ A3) 2003 A bleed air leak in the APU duct over the aft cargo compartment will A bleed air leak in the APU duct over the aft cargo compartment will illuminate the left WING-BODY OVERHEAT light, AIR COND annunciator and MASTER CAUTION lights.
_______________ Bleed air valves are DC controlled/pneumatically operated.
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