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adhering to critical surfaces will blow off in the early stages of takeoff roll.
Sec. 3 Page 324
Rev. 11/15/02 #41 Continental
737
Flight Manual
Deicing / Anti-Icing
Aircraft de-icing / anti-icing when required, will be accomplished in accordance
with the Continental GMM Section 06-14.
When freezing precipitation conditions exist, a two step deicing / anti-icing
procedure will be used. The first step, deicing, is the removal of contaminates
from the aircraft using diluted Types I, II or IV fluids or, at locations so equipped,
by use of an Infrared (IR) de-ice system. When an Infrared system is used, aircraft
will be taxi / towed to the entrance of the IR hangar where ground personnel will
marshal or ground tower will guide the aircraft into the hangar.
Note: The IR system software limits the maximum temperature during aircraft
de-icing to 120° F.
The second step, anti-icing, is a separate fluid application to protect against ice,
snow, slush or frost adhering to critical aircraft surfaces. Diluted Type 1 or 100%
Type II or IV fluids are used for anti-icing.
When freezing precipitation conditions do not exist and are not anticipated, a
one step, deicing, procedure will be used to remove any contaminates that may
have adhered to the aircraft during a previous exposure to freezing precipitation.
Aircraft may be deiced / anti-iced with the engines and/or APU shutdown or
operating. In either case the air conditioning supply switches and APU air
switch should be selected off to prevent fumes from entering the cabin through
the air conditioning system.
After completion of deicing / anti-icing, run engines and APU for approximately
one minute with the air conditioning supply switches and APU air switch
selected off to ensure that all deicing / anti-icing fluid has been cleared from the
engines and APU. Consider making an announcement advising passengers that
a trace of odor may be sensed but it is a normal condition of deicing.
Post Deicing / Anti-Icing Inspections
After the final anti-icing fluid application, personnel qualified in ground deicing
inspection procedures will inspect critical aircraft surfaces to ensure that they
are free of ice, slush, snow, or frost. Critical aircraft surfaces are listed in this
section under Predeparture Check.
737
Flight Manual Continental
Sec. 3 Page 325
Rev. 11/15/02 #41
After completion of the inspection, the flight crew will be notified via radio or
interphone communication that deicing / anti-icing and inspection procedures
have been completed. This notification must contain the following four
elements:
SAE Fluid Type: I, II or IV
Fluid Mixture: 100/0 = 100% Fluid / 0% Water,
75 / 25 = 75% Fluid / 25% Water,
50 / 50 = 50% Fluid / 50% Water
Local Time: (Hours/Minutes) of the beginning of the final anti-icing
fluid application
Employee Number: Of qualified person certifying that the deicing / antiicing
and inspection procedures were accomplished.
After receipt of this information, the flight crew will make the following aircraft
logbook entries:
Block (2) Aircraft Fleet Number
Block (3) Flight Number
Block (4) Employee Number of Captain
Block (5) Station
Block (6) Day of Month
Block (7) Month
Block (8) Aircraft anti-iced, type fluid, fluid mixture, local
time (hours/minutes) of the beginning of the final
anti-icing fluid application, employee number of
qualified person certifying that the deicing / antiicing
and inspection procedures were accomplished
in accordance Continental GMM Section 06-14 and
is released for flight. (e.g., “Aircraft Deiced, Type I /
50/50 / 0830 / 38802”)
Note: The above notification and subsequent logbook entry are only required
when freezing precipitation conditions exist. The situation may occur
where the aircraft was exposed to freezing precipitation several hours
prior to its next scheduled departure, such as an RON. The weather at
departure time is such that no freezing precipitation conditions exist. In
this situation the aircraft requires deicing only to clean any adhering ice,
snow, slush or frost that may have previously accumulated on the aircraft.
The aircraft does not have to be anti-iced because freezing precipitation
conditions do not exist. In this case, post deicing inspection procedures
will be accomplished, however the flight crew does not have to be
notified and the logbook entry is not required.
Sec. 3 Page 326
Rev. 11/15/02 #41 Continental
737
Flight Manual
Pretakeoff Contamination Check
After completion of the post deicing preflight inspection and only when freezing
　
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