Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 624

SECTION 8
AIRPLANE HANDLING, SERVICE
AND MAINTENANCE
GROUND DEICE/ANTI-ICE OPERATIONS
Refer to Figure 8-4, Essential Areas To Be Deiced, for areas to spray
Type I deicing fluid, Figure 8-5, Essential Areas To Apply Anti-ice Fluid,
for areas to spray Type II, Type III and Type IV anti-icing fluid, Figure 8-
6, Deice And Anti-ice Fluid Direct Spray Avoidance Areas, for areas to
avoid spraying directly, and Figure 8-7, Deicing And Anti-icing
Application, for sequence of application.
Heated solutions of Freezing Point Depressant (FPD) are more
effective than unheated solutions because thermal energy is used to
melt the ice, snow, or frost formations. Type I deicing fluids are used in
the diluted state, with specific ratios of fluid-to-water dependent on
ambient temperature. Type I deicing fluids have a very limited holdover
time. Refer to FAA Notice 8900.196, dated 8-16-12 or later.
Type I fluids should never be used full strength
(undiluted). Undiluted glycol fluid is quite viscous below
14°F (-10°C) and can actually produce lift reductions of
about 20 percent. Additionally, undiluted glycol has a
higher freezing point than a glycol/water mixture.
•
Deicing and anti-icing procedures must be closely
coordinated between the pilot in command and ground
crews, and carried out in a timely manner. Ultimate
responsibility for safety of flight rests with the pilot in
command, and any decisions to deice or anti-ice an
airplane must be accomplished under his or her direct
supervision.
•
The first area to be deiced and anti-iced must be visible
from the cockpit and must be used to provide a
conservative estimate for subsequent ice accumulations
on unseen areas of the airplane before initiating takeoff.
•
Due to the weight and C.G. changes that occur while
deicing the airplane, a tail stand must be placed under
the tail to prevent the airplane from tipping on its tail.
8-34 U.S.
CAUTION
NOTE
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CESSNA
MODEL 208B 867 SHP
GARMIN G1000
(Continued)
208BPHCUS-00