CESSNA SECTION 8
MODEL
2088 (675 SHP)HANDLING, SERVICE, AND MAINTENANCE
GROUNDDEICEIANTI-ICE OPERATIONS (Continued)
NOTE
Freezing point of Type IV fluid mixture must be at least
10°C (18°F) below OAT.
Holdover time starts when last application has begun.
Application techniques for Type IV fluid are the same as
for Type I, except that since the airplane is already
clean, the application should last only long enough to
properly coat the airplane surfaces.
NOTE
Type
IV fluid should be applied undiluted at ambient
temperature to a "clean" airplane within three minutes after
deicing is completed, due to the limited holdover times of
Type
I
deice fluid. Type IV fluid is however, sometimes
heated and sprayed as a deicing fluid. For this case, it
should be considered a Type I fluid, as the heat may
change the characteristics of the thickening agents in the
fluid. Type
IV fluid therefore, applied in this manner, will not
be as effective as it would be if it were applied at ambient
temperature.
CAUTION
SOME TYPE IV FLUIDS COULD FORM A THICK OR
HIGH STRENGTH GEL DURING "DRY-OUT" AND
WHEN REHYDRATED FORM A SLIPPERY FILM.
SOME TYPE IV FLUID EXHIBIT POOR
AERODYNAMIC ELIMINATION (FLOW-OFF)
QUALITIES AT COLDER TEMPERATURES.
HEATED AREAS OF AIRCRAFT (I.E.; HEATED
LEADING EDGE) SHOULD BE AVOIDED DUE TO THE
FACT THAT FLUID MAY "DRY-OUT" INTO HARD
GLOBULAR NODULES.
TYPE
IV FLUID SHOULD NOT BE USED UNDILUTED
BELOW -24°C (-11
OF).
U.S. 8-35
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