Honda HondaJet HA-420 Pilots Operating Manual page 384

HA-420
POM
airplane surfaces. Fluid manufacturers provide recommended dilution
mixtures based on outside air temperatures (OAT) and precipitation
conditions. The flight crew should consult with the de-icing crew to
verify that the fluid mixture is suitable for the atmospheric conditions.
NOTE
The ONE-STEP process is the application of heated, diluted de-ice fluid
to remove ice, snow and/or frost from airplane surfaces and to protect the
airplane from further accumulation.
The TWO-STEP process is de-icing with hot water or a hot mixture of
water diluted with de-icing fluid followed immediately by treatment with
anti-icing fluid. The two-step process is generally accomplished using
Type II or IV fluid.
CAUTION
Holdover time is the estimated time de-icing/anti-icing fluid will prevent
ice, snow and/or frost from forming or accumulating on the treated
surfaces of an airplane. The protection time is dependent upon the
conditions at the time and the fluid mixture selected. Be sure to use
equipment designated for the fluids being applied. Equipment suitable
for the application of Type I fluids may not be suitable for the
application of Type II or IV fluids. The protective properties of Type II
and IV fluids can be seriously degraded by mechanical shearing that is
inherent in the design of some dispensing equipment. Mechanical or
equipment shearing of many Type II or IV fluids may reduce their
viscosity and therefore, the estimated holdover time. Since Type I fluids
are not similarly affected, be sure to refer to the fluid manufacturer's
guidelines for the specific fluid being used.
October 30, 2016
Honda Aircraft Company
If the aircraft is going to be left outside overnight,
consider applying cold Type I, II or IV de-ice or anti-ice
fluid. This will aid in de-icing the aircraft the following
day.
Care must be taken not to allow the aircraft
surfaces to re-freeze between the de-icing and
anti-icing processes.
HJ1-29000-005-001
FOR TRAINING PURPOSES ONLY
SERVICE, HANDLING,
AND MAINTENANCE
4-36