2B-86 Developed for Training Purposes Leerjet 35/36
December 1998
CAE SimuFlite
Deicing Supplemental Information
This section provides supplementary information on aircraft
deicing, anti-icing/deicing fluids, deicing procedures, and air-
craft operating procedures. Consult the AFM, Maintenance
Manual Chapter 12 – Servicing, and FA A Advisory Circulars
for deicing procedures, fluid specifications, recommendations,
and hazards.
Federal Aviation Regulations (FARs) prohibit takeoff with snow,
ice, or frost adhering to the wings and control surfaces of the
aircraft. It is the responsibility of the pilot-in-command to ensure
the aircraft is free of snow, ice, or frost before takeoff.
Failure to adequately deice the aircraft can result in seriously
degraded aircraft performance, loss of lift, and erratic engine
and flight instrument indications.
Following extended high-altitude flight, frost can form at ambi-
ent temperatures above freezing on the wing’s underside in the
fuel tank areas. Refueling the aircraft with warmer fuel usually
melts the frost.
CAUTION: Type I and Type II/ IV fluids are not compatible
and may not be mixed. Additionally, most manufacturers
prohibit mixing of brands within type.
NOTE: The first area to be deiced/anti-iced should be eas-
ily visible from the cabin/cockpit and should be used to pro-
vide a conservative estimate for unseen areas of the aircraft
before initiating takeoff roll.
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