COLD WEATHER OPERATIONS

  1. Can you takeoff on a wet or contaminated runway using reduced thrust?
    For wet runways, reduced thrust (fixed derate, assumed temperature method, or both) is allowed provided suitable takeoff performance accountability is made for the increased stopping distance on a wet surface. 

    For runways contaminated by slush, snow, standing water, or ice, reduced thrust (fixed derate) is allowed provided takeoff performance accounts for the runway surface condition.

    Reduced thrust using assumed temperature method, whether alone or in combination with a fixed derate, is not allowed.

    FCOM Supplementary Procedures/Adverse Weather
  2. Takeoffs are not recommended when slush, wet snow, or standing water depth is more than ___ or dry snow depth is more than ___.
    1/2 inch (13mm) 

    4 inches (102 mm)

    FCOM Limitations
  3. When do icing conditions exist on the ground?
    -When the OAT is 10C or below and 

    -Visible moisture (clouds, fog with visibility of one statute mile (1600m) or less, rain, snow, sleet, ice crystals, and so on) is present, or

    -Standing water, ice, or snow is present on the ramps, taxiways, or runways.

    FCOM Limitations
  4. When do icing conditions exist in flight?
    When the TAT is 10C or below and visible moisture (clouds, fog with visibility less than one mile, rain, snow, sleet, ice crystals, and so on) is present, except during climb and cruise below -40°C SAT

    FCOM Limitations
  5. CAUTION: Use of wing anti-ice above approximately ___ may cause bleed trip off and possible loss of cabin pressure.
    FL350

    FCOM Limitations
  6. If the engine has been cold soaked for ___ at ambient temperatures below ___, do not start or motor the engine.  Maintenance personnel should do appropriate procedures for adverse weather heating of the Hydro-Mechanical Unit. If the engine has been cold soaked for ___ hours at ambient temperatures below ___, do not start or motor the engine.  Maintenance personnel should do appropriate procedures for adverse weather starter servicing
    If the engine has been cold soaked for one or more hours at ambient temperatures below -40C, do not start or motor the engine.  Maintenance personnel should do appropriate procedures for adverse weather heating of the Hydro-Mechanical Unit. If the engine has been cold soaked for three or more hours at ambient temperatures below -40C, do not start or motor the engine.  Maintenance personnel should do appropriate procedures for adverse weather starter servicing

    FCOM Supplementary Procedures/Adverse Weather
  7. If ambient temperature is below ___, idle the engine for ___ before changing thrust lever position
    If ambient temperature is below -35C, idle the engine for two minutes before changing thrust lever position

    FCOM Supplementary Procedures/Adverse Weather
  8. ___ minutes may be needed for oil pressure to reach the normal operating pressure. During this period, oil pressure may go above the normal range and the OIL FILTER BYPASS light may illuminate.  Operate the engine at idle thrust until oil pressure returns to the normal range. If the oil pressure remains above the normal range after the oil temperature has stabilized within limits, shut down the engine.
    Several minutes may be needed for oil pressure to reach the normal operating pressure. During this period, oil pressure may go above the normal range and the OIL FILTER BYPASS light may illuminate.  Operate the engine at idle thrust until oil pressure returns to the normal range. If the oil pressure remains above the normal range after the oil temperature has stabilized within limits, shut down the engine.

    FCOM Supplementary Procedures/Adverse Weather
  9. When is engine anti-ice required on the ground?
    Engine anti-ice must be selected ON immediately after both engines are started and remain on during all ground operations when icing conditions exist or are anticipated, except when the temperature is below -40°C OAT.

    FCOM Supplementary Procedures/Adverse Weather
  10. If the COWL VALVE OPEN lights remain illuminated bright with engines at IDLE, position APU BLEED air switch to OFF and increase thrust slightly (up to a maximum of ___).
    If the COWL VALVE OPEN lights remain illuminated bright with engines at IDLE, position APU BLEED air switch to OFF and increase thrust slightly (up to a maximum of 30% N1).

    FCOM Supplementary Procedures/Adverse Weather
  11. When is wing anti-ice required on the ground?
    Use wing anti-ice during all ground operations between engine start and takeoff when icing conditions exist or are anticipated, unless the airplane is, or will be protected by the application of Type II or Type IV fluid in compliance with an approved ground de-icing program. 

    FCOM Supplementary Procedures/Adverse Weather
  12. Normally the IDGs stabilize within ___, although due to cold oil, up to ___ can be needed to produce steady power.
    Normally the IDGs stabilize within one minute, although due to cold oil, up to five minutes can be needed to produce steady power.

    FCOM Supplementary Procedures/Adverse Weather
  13. When setting the flaps for takeoff, move the flaps from ____ to ensure freedom of movement.  Then set flaps as needed.
    When setting the flaps for takeoff, move the flaps from Flaps up to Flaps 40 back to Flaps up (i.e., full travel) to ensure freedom of movement.  Then set flaps as needed.

    FCOM Supplementary Procedures/Adverse Weather
  14. When engine anti-ice is required and the OAT is ___, do an engine run up, as needed, to minimize ice build-up.
    When engine anti-ice is required and the OAT is 3°C or below, do an engine run up, as needed, to minimize ice build-up.

    FCOM Supplementary Procedures/Adverse Weather
  15. Describe the engine run-up procedure
    Run-up to a minimum of 70% N1 for approximately 30 seconds duration at intervals no greater than 30 minutes.  

    Note: When operating in conditions of freezing rain, freezing drizzle, freezing fog or heavy snow, run-ups to a minimum of 70% N1 for approximately 1 second duration at intervals no greater than 10 minutes enhance ice shedding.

    FCOM Supplementary Procedures/Adverse Weather
  16. Wait approximately ___ after de-icing is completed to turn engine BLEED air switches on to ensure all de-icing fluid has been cleared from the engines.
    Wait approximately one minute after de-icing is completed to turn engine BLEED air switches on to ensure all de-icing fluid has been cleared from the engines.

    FCOM Supplementary Procedures/Adverse Weather
  17. When is engine anti-ice required in flight?
    Engine anti–ice must be ON during all flight operations when icing conditions exist or are anticipated, except during climb and cruise when the temperature is below -40°C SAT. Engine anti–ice must be ON before, and during descent in all icing conditions, including temperatures below -40°C SAT.

    FCOM Supplementary Procedures/Adverse Weather
  18. If flight in moderate to severe icing conditions cannot be avoided, do the following on both engines, one engine at a time at approximately ___ intervals:
    If flight in moderate to severe icing conditions cannot be avoided, do the following on both engines, one engine at a time at approximately 15 minute intervals:

    Increase thrust to a minimum of 80% N1 for approximately 1 second to ensure the fan blades and spinner are clear of ice.

    FCOM Supplementary Procedures/Adverse Weather
  19. Indication that structural icing conditions exist and the need to turn wing anti-ice on:
    Ice accumulation on the flight deck window frames, windshield center post, or on the windshield wiper arm may be used

    FCOM Supplementary Procedures/Adverse Weather
  20. Apply the altitude correction table under the following conditions:
    -Do not apply a temperature correction to an ATC assigned altitude.

    -No corrections are needed for reported temperatures above 0°C or if the airport temperature is at or above the minimum published temperature for the procedure being flown

    Image Upload 1

    AFI 11-202V3 Chapter 7
  21. In which publication can the Cold Temperature Altitude Correction charts be found?
    FCOM/Supp Procedures/Adverse Weather or Flight Information Handbook
  22. Does the C-40C have a compensated or uncompensated Baro-VNAV system?
    Boeing airplanes do not automatically compensate for temperature. However, if cold temperature altitude corrections are manually input as described in the Cold Weather Operations Supplementary Procedures chapter of the FCOM, the airplane is considered to have a compensated Baro-VNAV system.

    FOM 1.20
  23. After prolonged operation in icing conditions with the flaps extended, or when an accumulation of airframe ice is observed, or when landing on a runway contaminated with ice, snow, or slush:  Do not retract the flaps to less than ___ until the flap areas have been checked to be free of contaminants.
    After prolonged operation in icing conditions with the flaps extended, or when an accumulation of airframe ice is observed, or when landing on a runway contaminated with ice, snow, or slush:  Do not retract the flaps to less than flaps 15 until the flap areas have been checked to be free of contaminants.

    FCOM Supplementary Procedures/Adverse Weather
  24. Can you takeoff with frost on the fuselage?
    Thin hoarfrost is acceptable on the upper surface of the fuselage provided all vents and ports are clear. Thin hoarfrost is a uniform white deposit of fine crystalline texture, which usually occurs on exposed surfaces on a cold and cloudless night, and which is thin enough to distinguish surface features underneath, such as paint lines, markings or lettering.

    FCOM Supplementary Procedures/Adverse Weather
  25. In which publication can the Runway Condition Assessment Matrix (RCAM) be found?
    FOM Ch. 3
  26. Is takeoff allowed with cold soaked fuel frost on the upper wing?
    Yes, under the following conditions:

    The CSFF on the wing tank upper surfaces is only within the lines defining the permissible CSFF area with no snow, ice or frost on the leading edges or control surfaces and;

    -Ambient air temperature is at or above +4°C, +39°F

    -There is no precipitation or visible moisture (rain, snow, drizzle, or fog with less than 1 mile visibility)

    -Tank fuel temperature is at or above -16°C, +3°F.

    FCOM SP Anti-ice, Rain
  27. Is takeoff allowed with cold soaked fuel frost on the lower wing?
    Takeoff with CSFF on lower wing surfaces is allowable provided all of the following conditions are met:

    -Ambient air temperature is at or above +4°C, +39°F

    -There is no precipitation or visible moisture (rain, snow, drizzle, or fog with less than 1 mile visibility)

    -Tank fuel temperature is at or above -16°C, or +3°F

    -All leading edge devices, all control surfaces, tab surfaces, winglet surfaces, and control surface balance panel cavities must be free of snow, ice and frost.  If all of the above conditions are not met, takeoff with light coatings of frost, up to 1/8 inch (3 mm) in thickness, on lower wing surfaces due to cold fuel is allowable; however, all leading edge devices, all control surfaces, tab surfaces, winglet surfaces and control surface balance panel cavities must be free of snow, ice and frost. If the frost on the lower surface is greater than 1/8 inch (3 mm) in thickness, all snow, ice and frost on the wings must be removed using appropriate deicing/anti-icing procedures.

    FCOM SP Anti-ice, Rain
  28. Are multiple approaches and/or touch and gos approved in icing conditions?
    No.

    FOM
  29. Can you takeoff under conditions of freezing rain or freezing drizzle?
    Freezing rain-NO

    Freezing drizzle-YES, if the aircraft has been properly de-iced/anti-iced.

    11-2VIP V3
  30. Can you fly into areas of forecast or reported severe icing?
    No.

    11-2VIP V3
  31. For the first flight of the day, at airport elevations at or above ___, if the temperature is below ___, consider placing the Ignition select switch to BOTH before starting the engines. This may increase the likelihood of a successful engine start on the first attempt.
    For the first flight of the day, at airport elevations at or above 2,000 feet MSL, if the temperature is below 5°C/41°F, consider placing the Ignition select switch to BOTH before starting the engines. This may increase the likelihood of a successful engine start on the first attempt.

    FCOM Normal Procedures
Author
CForty
ID
349979
Card Set
COLD WEATHER OPERATIONS
Description
C-40 COLD WEATHER OPERATIONS
Updated