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Flashcards

Pneumatics

Ella Davies TYPE RATING DASH 8 Q400 English 83 cards

Cards in this deck (83)

  1. 1what is APU bleed air used forAir con
    Aft safety valve
  2. 2what is eng bleed air used for?Airframe deicing
    Aircon
    pressurising seals
    ac pressuriasation
  3. 3what are the 3 types of airp2.2
    p3.0
    p2.7
  4. 4what is the roll of p3.0used in low power settings to supplement p2.7
  5. 5what must happen to p3 before it can be usedit must be precooled
  6. 6what is 2.7 used forprimary supply in normal conditions
  7. 7what is p2.2 used forused to cool p3 and p2.7
  8. 8ECUEnvironmental control Unit
  9. 9ECSEnvironmental control system
  10. 10when is deicing availableits always available whenever the engines are running
  11. 11where does the airflow from the system comeeach digital channel shares airflow around the system 50/50
  12. 12how is the 50/50 split in air achievedthe nacelle SOV is modulated to maintain the 50% from each engine
  13. 13what is the nacelle shut off valve controlled bythe bleeds on/off switch
  14. 14when will the engine bleeds automatically closeWhen Main DC power is lost
  15. 15what will the ECU do in the event of an emergencyit will override pilot selections
  16. 16what will the ECU do in the event of an engine failureECU controls the bleed flow irrespective of dial position
  17. 17with the bleed switch on, what does the dial position affectthe rated power
  18. 18basic make up of ECU2 primary digital channels
    2 backup analog channels
  19. 19what is the role of the ECUmonitors the protective devices in the system
    regulates bleed air flow rate and pressure for the aircon and pressurisation
  20. 20what is bleed air used to doaircon, so heat and cool
  21. 21what is the role of the bypass valvesthey control how much hot air is reintroduced to the system to regulate temperature
  22. 22what are the three positions for the packsoff manual auto
  23. 23what happens when the switch is in offcloses TSOVS of the associated pack
  24. 24what happens when the switch is in manualwe use the rotary knobs to directly control the bypass valves
    DUCT temperature
  25. 25what happens when the switch is in autoECS controls the ZONE temp
  26. 26what is the limits of DUCT temperature2.8-71
  27. 27what are the limits of the ZONE temperature15-27 C
  28. 28what is the total split of recycled air25% flt dck
    75% cabin
  29. 29how is this split achievedcabin air - 100% to cabin
    flt dck air - 50% to cabin
    flt dck air -50% to flt dck
  30. 30where is the aft outflow valve on the groundfully open
  31. 31where is the aft safety valve on the groundopen
  32. 32when is the forward safety valve on the groundfully closed
  33. 33where is the forward safety valve in normal operationclosed
  34. 34when would the forward safety valve openin event of under or over pressurisation
  35. 35what happens when the pressurisation system is lostEmergency Ram air flow
  36. 36how does the ram air ventilation flow direction wiseback to front of airplane
  37. 37how is the avionics bay cooledextraction type cooling by 3 fans
  38. 38describe the operation of the fans#1 and #2 work fully in normal operation
    #3 is a standby that will only come on when either of the 2 fail
  39. 39when do #1 and #2 startwhen the main buses are powered
  40. 40what indications do you getfor one fan - none
    for 2 fans - 'FANS FAIL' on ED
  41. 41How many fans are needed for dispatch2
  42. 42how is the cabin heated70 % from lower dado panels
    30% from overhead
  43. 43how is the cabin cooled30% from lower dado panels
    70% from overhead PSU Gaspers
  44. 44when would you get a BLEED HOT caution on CWPover temp
    over pressure
    leak
  45. 45How is the over t, over p and leak detectedby the ECU
  46. 46how does the ECU control the factors that BLEED HOT caution indicatesshuts off the Nacelle SOV
    2.2 SOV
    HPSOV
  47. 47what will the shutting of these valves causeRAM air ventilation must be used
  48. 48what will happen when PACK HOT indication is receivedBYPASS SHUTS
    TSOV
    PACK FC SOV
  49. 49what will happen when a DUCT HOT indication is recievedBypass shuts
    TSOV
    PACK FCSOV
  50. 50What will happen when the PACK FC SOV is closedwe loose all Aircon and Pressurisation
  51. 51how is the bleed air supply system affected by a loss of main DC Bus powerEngine bleeds automatically close
    Ram air Ventilation must be used
    HPSOV and NACELLE SOV close
  52. 52where does APU Bleed air enter the Bleed ductAfter the Nacelle SOV
  53. 53can APU bleed air be used if the engines are runningyes, as long as neither bleed is selected as on
  54. 54what is the purpose of the recirc fandraws air from the cabin, reconditions it in the aircon unit and sends it back into the cabin
  55. 55what determines the relative cabin flow rate to the upper and lower distribution ductsthe temperature selected
  56. 56how is the emergency ram air ventilation accomplishesclose rear outflow valve and open front outflow valve
  57. 57how is cabin pressurisation normally controlledAutomatically , the aft outflow valve modulates to maintain the correct cabin pressure
  58. 58how is the fuselage protected from over pressure and underpressureby the fwd and aft safety valves
  59. 59what prevents cabin from pressurising on the groundWOW
    PLA< 60
    AFT VALVES OPEN
  60. 60How can the forward outflow valve be controlledFOs side panel can open the outflow valve fully or progressively by the forward outflow valve selector on the pressure control panel
  61. 61what happens when the DUMP/MAN/AUTO switch is set to MANOutflow valve is held in current position and can be motored electrically using the man diff control to adjust cabin pressure
  62. 62what happens when the DUMP/MAN/AUTO switch is set to DUMPthe outflow valve is set to fully open, this takes 10 seconds
    completely depressurises
  63. 63how should the landing alt control be set prior to departurethe destination airfield elevation
  64. 64what value should be indicated at fl 1004 psi diff
  65. 65what valve should be indicated at fl 2005 psi
  66. 66how is cabin temperature controlled if APU bleed air is being usedthe same way as if eng bleed air
  67. 67how do the bleed air selector settings of NORM and MAX effect the flow of bleed air when operating on one enginethey dont, the movement of the switch only simulates the worse possible scenario
    only will change the annunciations on the ED
  68. 68how is Engine oil cooled on the groundOil cooler ejector
  69. 69where is the pilot input for the pressurisation systemat the 'pressure control panel'
  70. 70max altfl250
  71. 71norm cabin diff limit5.46 psi
  72. 72max cabin diff limit4.95 psi
  73. 73max cabin alt in pressurised flt8000 ft
  74. 74what does the pressurisation system need to functionone or both bleed switches on
    AND
    one or both pack switches at MAN or AUTO
  75. 75What is the aft safety valve powered byAPU bleed air
  76. 76what is the aft outflow valve powered byDC motors
  77. 77what is the fwd safety valve powered byventuri affect
  78. 78what can dump mode do when used in short burststo rid smoke from the aft of the cabin
  79. 79what can the forward outflow valve be set toNORMAL OR OPEN
  80. 80what can the forward outflow valve be used to dopurge smoke from the flight deck
  81. 81what happens with the pressurisation system if we need to return to airfield of departureit remember landing alt for ten mins
  82. 82what WARNING is associated with the pressurisation systemCABIN PRESS
  83. 83when will the warning light come onwhen the cabin pressure is >9800 ft

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TYPE RATING DASH 8 Q400 Flashcards on Pneumatics, created by Ella Davies on 11/05/2019.
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Ella Davies
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