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NOTE
In an
emergency
on
airplanes
not
equipped
with
an
alternate static
source,
cabin pressure
can
be
supplied
to
the static pressure instruments by breaking the glass in
the
face
of the rate-of-climb indicator.
With
the
alternate static
source on,
adjust indicated
airspeed
slightly
cluring climb
or approach
according
to
the
alternate static
source airspeed
calibration table
in
Section
5,
appropriate to vent/window(s) configura-
tion, causing the airplane to
be
flown
at the normal operating
speeds.
Maximum
airspeed
and
altimeter variation from normal
is
4
knots
and
30
feet
over the normal operating range
with
the
window(s)
closed.
with
window(s) open, larger variations occur near
stall
speed. However,
maximum altimeter variation remains within
50
feet
of normal.
CESSNA
MODEL
172N
S
PINS
Should an inadvertent sPin
occur,
should
be used:
SECTION
3
EMERGENCY
PROCEDURES
the
following
recovery
Procedure
1.
RETARD THROTTLE
TO
IDLE POSITION.
2.
PLACE AILERONS
IN NEUTRAL
POSITION.
3.
APPLY AND HOLD FULL RUDDER
OPPOSITE
TO
THE DIREC.
TION
OF
ROTATION.
4,
JUST
AFTER THE RUDDER REACHES THE
STOP,
MOVE
THE
CONTROL WHEEL
BRISKLY
FORWARD
FAR ENOUGH
TO
BREAK THE STALL. FulI down elevator may
be
required at aft
center of
gravity
loadings to
assure
optimum recoveries.
5.
HOLD THESE CONTROL INPUTS UNTIL ROTATION
STOPS.
Premature relaxation
of the
control inputs may
extend the
recov-
ery.
6.
AS ROTATION
STOPS,
NEUTRALIZE
RUDDER,
ANDMAKE A
SMOOTH
RECOVERY FROM THE RESULTING DIVE.
NOTE
If
disorientation precludes
a
visual determination
of
the
direction of rotation, the symbolic airplane
in
the turn
coordinator may
be
referred to for
this information'
For additional
sion under
SPINS
1
July
1979
information
on
spins
and
spin recovery,
see
the
discus-
in Normal
Procedures (Section
4).
3-
15
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