Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 628

SECTION 8
AIRPLANE HANDLING, SERVICE
AND MAINTENANCE
GROUND DEICE/ANTI-ICE OPERATIONS
HOLDOVER TIMETABLE (TYPE I, TYPE II, TYPE III, AND
TYPE IV FLUIDS)
TYPE II ANTI-ICE FLUID
•
Freezing point of Type II fluid mixture must be at least
7°C (13°F) below OAT.
•
Holdover time starts when last application has begun.
•
Application techniques for Type II 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.
•
Type II fluid can 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 II 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 II fluid therefore, applied in this
manner, will not be as effective as it would be if it were
applied at ambient temperature.
Some Type II fluids could form a thick or high strength
gel during "dry-out" and when rehydrated can freeze
restricting movement of flight control surfaces, while in
flight.
When ground icing conditions are present, a
pretakeoff contamination check must be conducted
by the pilot in command within 5 minutes of takeoff,
preferably just prior to taxiing onto the active
runway. Critical areas of the airplane such as
empennage, wings, windshield, control surfaces,
and engine inlets must be checked to make sure
they are free of ice, slush, and snow and that the
anti-ice fluid is still protecting the airplane.
8-38 U.S.
(Continued)
NOTE
CAUTION
WARNING
CESSNA
MODEL 208B 867 SHP
GARMIN G1000
(Continued)
208BPHCUS-00