Textron Cessna 172R, Руководство по эксплуатации для пилотов

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SECTION 4
NORMAL PROCEDURES
CESSNA
MODEL 172R
COLD WEATHER OPERATION
Special
consideration should be given to the operation of the
airplane fuel system
during the winter season
or
prior
to
any flight in
cold
temperatures.
Proper preflight draining of the fuel
system
is
especially important and will eliminate any free water
accumulation.
The
use
of
additives such as isopropyl alcohol or diethylene glycol
monomethyl ether
may also be desirable. Refer
to
Section
8
for
information
on the
proper
use
of additives.
Cold weather often
causes conditions which require special care
during
airplane operations. Even small accumulations of frost, ice,
or snow
must be
removed, particularly from wing, tail and all control
surfaces
to
assure satisfactory flight performance and handling.
Also,
control
surfaces must
be free of any internal accumulations of
ice
or
snow.
If
snow or
slush
covers the takeoff surface, allowance must
be
made for
takeoff distances which will be increasingly extended
as
the snow or slush depth increases.
The depth
and
consistency of
jthis
cover can, in fact, prevent takeoff in many instances.
A
WARNING
WHEN PULLING THE PROPELLER THROUGH BY
HAND,
TREAT IT AS IF THE IGNITION SWITCH IS
TURNED ON. A LOOSE OR BROKEN GROUND
WIRE ON EITHER MAGNETO COULD CAUSE
THE ENGINE TO
FIRE.
Prior to
starting on cold mornings, it
is advisable
to
pull the
propeller through several times by
hand
to
"break loose"
or
"limber" the oil, thus conserving battery energy.
When air
temperatures
are below 20°F (-6°C), the
use
of
an
external preheater
and an external power
source are recommended
whenever
possible
to
obtain positive starting
and
to
reduce wear
and abuse
to the engine
and electrical
system.
Preheat will thaw
the
oil
trapped in the oil cooler,
which probably will be congealed prior
to starting
in
extremely cold
temperatures.
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