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Honda Aircraft Company
HA-420
SERVICE, HANDLING,
POM
AND MAINTENANCE
GROUND DE-ICING
This section contains procedures for de-icing HA-420 airplanes on the
ground before flight. For additional information, refer to OPERATING
IN ICING CONDITIONS (Section 4 - Normal Procedures) and ICING
LIMITATIONS (Section 2 – Limitations) of the Airplane Flight Manual.
GENERAL
It is essential to takeoff with an aerodynamically clean airplane. The
pilot-in-command has the responsibility to determine that all surfaces of
the airplane (wing, vertical and horizontal stabilizers, flight controls and
flaps) are free of frost, ice and snow before takeoff. If planning to take
off in ground icing conditions, or if the aircraft has been previously
contaminated, a ground de-icing/anti-icing procedure must be performed
prior to takeoff.
Airplane de-icing/anti-icing may be accomplished in either a one-step or
two-step process. During periods of precipitation, once the airplane has
been de-iced, anti-icing is likely to be required. Close coordination with
the flight crew and ground crew may be necessary to ensure the airplane
is aerodynamically clean for departure; close coordination may be
necessary with air traffic control to ensure that delays are minimal to
keep the airplane aerodynamically clean before takeoff.
DE-ICING/ANTI-ICING FLUIDS
This section references three types of de-icing/anti-icing fluids referred
to as Freezing Point Depressant (FPD) fluids. The Society of Automotive
Engineers (SAE) and International Standards Organization (ISO) define
Type I, II and IV fluids. Types I, II and IV fluids may be used as defined
in ICING LIMITATIONS in Section 2 - LIMITATIONS of the Airplane
Flight Manual. Type I and II fluids can be used for de-icing. Type IV
fluids can be used for both de-icing and anti-icing.
HJ1-29000-005-001
October 30, 2016
4-34
FOR TRAINING PURPOSES ONLY
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