CESSNA
MODEL 172R
SECTION
3
EMERGENCY PROCEDURES
WING FIRE
1
.
Landing/Taxi Light
Switches
--
OFF.
2.
Navigation Light
Switch
-
OFF.
3.
Strobe
Light
Switch
-
OFF.
4.
Pitot
Heat Switch
-
OFF.
NOTE
I
{
Perform
a
sideslip
to
keep
the
flames
away from the fuel
tank
and
cabin.
Land as soon as
possible using flaps only
as
required for final approach and touchdown.
1. Turn
pitot heat switch
ON.
2.
Turn back or
change
altitude
to
obtain an
outside air
temperature
that is less conducive
to
icing.
3.
Pull
cabin heat
control
full
out
and
open
defroster outlets
to
obtain maximum
windshield
defroster airflow. Adjust cabin
air control
to get
maximum defroster
heat
and
airflow.
4.
Watch for signs of
engine-related icing
conditions.
An
unexplained
loss
in
engine
speed could be
caused
by ice
blocking the air
intake
filter,
or, in
extremely
rare
instances,
ice completely
blocking
the fuel injection
air
reference
tubes.
Change the
throttle
position
to
obtain
maximum RPM.
This
may
require either
advancing
or
retarding
the
throttle,
dependent
on
where ice has accumulated in
the
system.
Adjust mixture,
as
required, for maximum RPM.
5. Plan
a landing
at
the
nearest
airport.
With an
extremely
rapid
ice build
up, select a suitable "off
airport"
landing
site.
6.
With
an
ice accumulation of
1/4
inch
or more
on
the
wing
leading
edges, be prepared for
significantly
higher stall
speed
and
a
longer landing roll.
7. Leave wing flaps retracted.
With a
severe ice build
up on
the
horizontal
tail,
the change
in
wing wake airflow
direction
caused
by wing
flap
extension
could result in a
loss
of
elevator
effectiveness.
8. Open
left
window
and, if
practical,
scrape ice
from
a
portion
of
the
windshield for
visibility in the landing approach.
9.
Perform
a
landing approach using
a forward slip,
if
necessary,
for
improved visibility.
ICING
INADVERTENT ICING ENCOUNTER
Revision 7
3-9
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