Specifications

SECTION IV
MODEL 560 OPERATING INFORMATION
NOTE
• Tables do not apply to other than SAE or ISO Type I, Type II, or Type IV FPD fluids.
• T he responsibility for the application of this data remains with the user.
• T he Freezing Point of Type I, Type II, and Type IV fluid mixture must be at least 10°C
(18°F) below the current OAT.
SPRAYING TECHNIQUE TYPE I FLUID
Type I fluid should be sprayed on the aircraft (with engines off) in a manner which minimizes heat loss
to the air. If possible, fluid should be sprayed in a solid cone pattern of large coarse droplets at a
temperature of 160° to 180°F. The fluid should be sprayed as close as possible to the airplane surfaces,
but not closer than 10 feet if a high pressure nozzle is used. Refer to Figure 4-2 and Figure 4-3 for
essential areas to be deiced or anti-iced.
SPRAYING TECHNIQUE TYPE II FLUID
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 aircraft surfaces.
Type II fluid should be applied cold to a clean airplane. It 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 applied in this manner will not be as
effective as if it were applied cold.
SPRAYING TECHNIQUE TYPE IV FLUID
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.
Type IV fluid should be applied cold to a clean airplane. It 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, applied in this manner will not be as
effective as if it were applied cold.
NOTE
• Holdover time starts when last application has begun.
• 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 fluids exhibit poor aerodynamic elimination (flow-off) qualities at colder
temperatures.
• Heated areas of the airplane (i.e.; heated leading edge) should be avoided due to the
fact that fluid may dry into hard globular nodules.
• T ype IV fluid should not be used undiluted below -24°C (-11°F).
PRETAKEOFF CONTAMINATION CHECK - GROUND ICING CONDITIONS
When ground icing conditions are present, a pretakeoff contamination check should be conducted by
the PIC/SIC within 5 minutes of takeoff, preferable just prior to taxiing onto the active runway. Critical areas
of the airplane such as empennage, wing, windshield and control surfaces should be checked to ensure
they are free of ice, slush and snow or that the deice/anti-ice fluids are still protecting the airplane.
I 56OMB-01 Configuration AA 4-29