SF340 Ice and Rain

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  1. What is required for the Saab to be dispatched into known icing conditions? 11-1
    All ice protection systems must be operable.
  2. Can the Saab be dispatched into icing conditions with side windshield INOP? 11-1
    Yes, if only one side window heat is INOP there is MEL relief.
  3. Which electrical ice protection system is NOT powered by the AC Generator? 11-2
    Standby Pitot heat
  4. What powers the Standby Pitot heat? 11-2
    Right Essential Bus
  5. How long does it take for the standby pitot to reach full operating temperature? 11-2
    At least 5 minutes
  6. What is powered automatically when the 1st AC GEN comes online? 11-3
    Main Pitot tubes, temp probe (WOW), AOA vanes
  7. What is the power source for the OAT probe? 11-5
    115 V AC generator
  8. Is there a pilot controlled switch for the OAT Probe heating? 11-5
  9. When is the OAT probe heated? 11-5
    From the time the gear is retracted till landing
  10. When is power supplied to the AOA vanes for heating? 11-6
    As soon as an AC Generator is online
  11. What is the power source for the windshield heat? 11-7
    115 Volt "wild" frequency bus
  12. What powers the 115 Volt "wild" frequency bus? 11-7
    AC Generator
  13. What is the time limit for side windshield heating? 11-8
    Operate in NORM for 7 minutes before selecting HIGH
  14. What is indicated by an illuminated L/R SIDE or L/R FRONT lights? 11-8
    Either an overheated windshield or a controller fault
  15. If power is interrupted to a windshield causing a FRONT/SIDE light to illuminate, will the light extinguish when power is restored? 11-8
    No, the switch must be turned off and then back on again to reset the system
  16. What does the AIR SUPPLY switch control? 11-10
    Controls a shut off valve to allow bleed air to the boot system
  17. What stage dows the bleed air for engine anti-ice come from? 11-10
    5th stage
  18. When Deflated what holds the boots "down" tight to the wing? 11-10
    Vacuum pressure
  19. What items use Bleed Air for Ice protection? 11-10&13
    Boot De-Icing, Engine split lip, engine guide vanes
  20. What order are the boots cycled in one cycle? 11-10
    Stab, outboard wing, inboard wing, stab
  21. Will the deice boots inflate with both bleed valves closed? 11-10
  22. Will boots inflate with H/P valves closed? 11-10
  23. Can boot inflation be monitored? 11-10
    Yes, by watching the boot indicator lights
  24. How often are the boots cycled when operating in "CONT"? 11-10
    Every 3 minutes
  25. Does the CWP ICE PROT light illuminate with all the icing systems?
  26. What is indicated by an illuminated DE-ICE OV TEMP light? 11-10
    An over temperature has been noted in the boot system (>150 degrees C)
  27. What is indicated by an illuminated TIMER light? 11-11
    The de-ice timer valves are malfunctioning, the cycle is interrupted, over or under pressure, or a computer malfunction
  28. Can the pilot manually de-ice just the wings? 11-11
  29. Can the pilot manualy de-ice just the stabilizer? 11-11
  30. How can the pilot de-ice just the outboard wing section? 11-11
    By pressing and holding the outboard push button for 6 seconds
  31. Why are HP valves kept in AUTO during flight in icing conditions? 11-11
    To insure proper boot inflation at low power settings
  32. What is indicated by an illuminated blue ENG ANTI-ICE light on the status panel? 11-13
    The associated Engine Intake switch is on
  33. Does the blue ENG ANTI-ICE status panel light extinguish with a failure of the Intake heat? 11-13
  34. Which light on the status panel does NOT indicate system working properly? 11-13
    Engine Anti-Ice
  35. Which ice protection system cannot be transferred to the opposite side AC GEN? 11-13
    Engine intake heat
  36. How is the inlet lip heated? 11-13
  37. How are the inlet frame vanes heated? 11-13
    Engine Oil
  38. How is the splitter lip and guide vanes heated? 11-13
    Bleed Air
  39. What controls bleed air to the splitter lip and guide vanes? 11-13
    Anti-ice start bleed valve (AISBV)
  40. What is indicated by an illuminated L AIR VALVE light? 11-14
    Associated Air valve is not positioned properly
  41. What is indicated by an illuminated INTAKE light? 11-14
    Intake heat has failed or lost one or more phases
  42. Is prop ice protection used as a de-ice or anti-ice system? 11-15
  43. When is Prop De-Ice turned on? 11-16
    When ice accretion is observed and SAT is -5 degrees C or colder
  44. What temperatures is NORM used for prop de-ice? 11-16
    -5 degrees C to -12 degrees C
  45. At what temperature does prop de-ice switch to MAX? 11-16
    Colder than -12 degrees C with ice accretion
  46. Why is it important to operate the props only after ice accretion? 11-16
    To avoid "run back" ice
  47. What is "run back" ice? 11-16
    Ice that melts and refreezes on the unheated section
  48. How much thrust is lost with "run back" ice on the props? 11-16
    Up to 30 percent of thrust
  49. Can the MAX mode be used between temperatures of -5 degrees C and -12 degrees C? 11-16
    Yes, if propeller vibrations occur MAX can be used up to -10 degrees C until vibrations dissipate
  50. What is the procedure for switching from NORM to MAX on prop heat? 11-16
    Turn switch off before switching to MAX to avoid nuisance cautions
  51. Which Ice protection systems have a Flight Status panel light? 11-16
    Prop De-Ice, and Engine Intake
  52. What does an illuminated blue PROP DE-ICE light on the status panel indicate? 11-16
    Prop De-ice is working properly
  53. What is the difference between the Engine and Prop status panel lights? 11-13&16
    Engine is switch only and the prop is system status
  54. What is indicated if a PROP DE-ICE status light is extinguished? 11-16
    Either the switch is turned off or the system malfunctioned.
  55. What is indicated by an illuminated L AC GEN light?
    Left AC GEN not supplying power
  56. What are the cycle times in NORM for Prop De-ice? 11-16
    11 seconds on 79 seconds off
  57. What are the cycle times in MAX for Prop De-ice? 11-16
    90 seconds on, 90 seconds off
  58. What is indicated with an illuminated PROP light on the overhead panel? 11-16
    Associated prop de-ice system is malfunctioning
  59. What is indicated by an illuminated STBY PITOT light? 11-19
    Standby pitot is not powered
  60. What is the purpose of the Park system on the windshield wiper? 11-22
    To return the wiper to the stowed position
Card Set
SF340 Ice and Rain
SF340 Ice and Rain
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