Cessna 172R, Operating Handbook

Page: 85 / 500

CESSNA
MODEL 172R
SECTION
3
EMERGENCY PROCEDURES
FORCED LANDINGS
If all
attempts to restart the engine fail and a forced landing is
imminent, select a suitable field and prepare
for the landing as
discussed under the Emergency Landing Without Engine Power
checklist. Transmit
Mayday message on
121.5
MHz giving location
and intentions and squawk
7700.
Before attempting an
"off airport" landing with engine power
available, one should fly over
the landing
area
at
a safe but low
altitude
to
inspect the terrain for obstructions
and surface
conditions,
proceeding as discussed under the Precautionary
Landing With Engine Power
checklist.
Prepare for ditching by securing or jettisoning
heavy objects
located in the
baggage
area
and collect folded
coats for protection
of
occupants'
face
at
touchdown. Transmit
Mayday message on
121.5 MHz giving location and intentions and squawk
7700. Avoid
a landing flare
because of difficulty in judging height over
a
water
surface.
The checklist assumes
the availability of power
to
make a
precautionary
water
landing.
If
power
is not available, use
of the
airspeeds noted with
minimum flap extension will provide
a
more
favorable attitude for a power off ditching.
In
a
forced landing situation, do
not set
the
AVIONICS MASTER
switch or the airplane MASTER switch
to
the OFF position until
a
landing is
assured. When these switches are
in the OFF position,
the airplane electrical
systems
are de-energized.
I
Before performing a forced landing, especially in
remote
and
mountainous areas, activate the
ELT transmitter by positioning the
cockpit-mounted switch
to
the
ON position. For complete
information
on ELT operation,
refer
to the
Supplements, Section
9.
LANDING WITHOUT ELEVATOR
CONTROL
Trim for horizontal flight
(with an airspeed of
approximately 65
KIAS and flaps set to 20°) by using
throttle and elevator trim
controls. Then do
not
change the
elevator trim control setting;
|
control the
glide angle by adjusting power
exclusively.
Revision 7
3-15