Cessna 172N - Page 36

SECTION 3
EMERGENCY
PROCEDURES
CESSNA
MODEL
172N
(3)
Reduce
power
to
set up a
500 to
800
ftlmin rate of
descent.
(4)
Adjust
the elevator
trim and rudder trim
(if
installed) for
a
stabilized
descent at 70-80 KIAS.
(5)
Keep
hands off the
control
wheel.
(6)
Monitor
turn coordinator
and make
conections
by
rudder
alone.
(7)
Check
trend of compass
card movement
and
make cautious
cor-
rections
with rudder
to stop the turn.
(8)
Upon
breaking
out
of clouds,
resume normal cruising
ftight.
R,ECOVERY
FRO'VI A
SPIRAT
DIVE
If a
spiral
is
encountered,
proceed
as
follows:
(1)
Close the throttle.
(2)
Stop
the turn by
using
coordinated
aileron
and
rudder control to
align
the
symbolic airplane
in the turn coordinator with the horizon
reference
line.
(3)
Cautiously
apply
elevator
back
pressure
to slowly
reduce the
airspeed
to 80 KIAS.
(4)
Adjust
the
elevator trim control to maintain an 80
KIAS
gtide.
(5)
Keep
hands off the
control
wheel,
using
rudder
control
to
hold
a
straight
heading.
Adjust
rudder trim
(if
installed) to relieve unbal-
anced
rudder
force.
(6)
Apply
carburetor
heat.
(7)
Clear
engine
occasionally, but avoid
using enough
power
to
disturb
the trimmed
glide.
(8)
Upon
breaking out
of clouds,
resume
normal cruising
flight.
FLIGHT
IN ICING
CONDITIONS
Flight
into
icing
conditions is
prohibited.
An
inadvertent
encounter
with
these
conditions
can
best be handled
using the
checklist
procedures.
The
best
procedure,
of
course,
is
to
turn back
or
change
altitude to
es-
cape icing
conditions.
STATIC
SOURCE
BIOCKED
If
erroneous
readings
of the
static
source
instmments
(airspeed,
altimeter and
rate-of-climb)
are
suspected,
the
alternate
static source
valve
should be
pulled
on,
thereby supplying
static
pressure
to these
instruments
from the
cabin.
NOTE
In an
emergency on airplanes
not equipped
with an alter-
nate
static source,
cabin
pressure
can
be
supplied to
the
3-12