Chapter 2 - Theory and Aircraft Performance


15.  Precipitation of small balls or pieces of ice with a diameter ranging from 5 mm to greater than 50 mm falling either separately or agglomerated.


Heavy freezing rain, heavy snow conditions and ice pellets.

  • Aircraft anti-icing fluid Hold Over Times have not been evaluated under moderate and heavy freezing rain conditions.
  • The capability of anti icing fluid to tolerate a heavy snowfall rate has not been evaluated; therefore holdover times for heavy snow conditions have not been generated.
  • The holdover time performance of an anti-icing fluid in the presence of ice pellets has not been evaluated, but is expected to be extremely short.