Forced Landings - Cessna 172S Nav III Information Manual

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SECTION 3 CESSNA
EMERGENCY PROCEDURES MODEL 172S NAV III
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 in 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 messages on
121.5 MHz giving location and intentions and squawk 7700. Avoid
a landing flare because of the 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.
For a forced landing situation, set the STBY BATT Switch to the off
position. Do not set the AVIONICS (BUS 1 and BUS 2) Switch or
the MASTER Switch (ALT and BAT) to the OFF position until a
landing is assured. When these switches are in the OFF position,
the airplane electrical systems are de-energized.
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.
13-24 U.S. 172SPHAUS-01