2B-88 Developed for Training Purposes Leerjet 35/36
December 1998
CAE SimuFlite
Deicing Procedures
One-step deicing involves spraying the aircraft with a heated,
diluted deicing/anti-icing fluid to remove ice, snow, or frost. The
fluid coating then provides limited protection from further accu-
mulation.
Two-step deicing involves spraying the aircraft with hot water
or a hot water/deicing fluid mixture to remove any ice, snow, or
frost accumulation followed immediately by treatment with anti-
icing fluid (usually Type II/IV FPD fluid).
Deice the aircraft from top to bottom. Avoid flushing snow, ice,
or frost onto treated areas. Start the deicing process by treating
the horizontal stabilizer followed by the vertical stabilizer. Con-
tinue by treating the fuselage top and sides. Finally, apply deic-
ing fluid to the wings.
Deicing fluid should not be applied to:
Q
pitot/static tubes, static ports, temperature probes, AOA
vanes, or TAT probe
Q
gaps between control surfaces and airfoil
NOTE: Holdover time is the estimated time that an anti-
icing/deicing fluid protects a treated surface from ice or frost
formation.
CAUTION: Deicing and use of holdover times remains the
responsibility of the pilot-in-command.
CAUTION: Type II/IV FPD generally should not be applied
forward of the wing leading edges. If used for deicing, do
not apply forward of cockpit windows. Ensure that radome
and cockpit windows are clean.
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