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Cessna 172 - Page 46

Cessna 172
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-!
To
gain
access to the unit, pull out
on
the black
fasteners
on
the bottom ·
of
the
cover
and
remove the cover. The ELT
is
operated
by
a control
panel
at
the forward facing end of the unit.
(see
figure 3-1).
Ell
OPERATIC~.
·
(1)
NORMAL
OPERATION:
As
long
as
the function
selector
switch
remains in the
ARM
position, the ELT automatically activates follow-
ing
an
impact of 5 g
or
more
over a short period of time.
(2)
ELT FAIL URE:
If
"g" switch actuation
is
questioned following
a minor
crash
landing, gain ac;cess to the ELT
and
place the function
selector switch in the
ON
position.
(3)
PRIOR
TO
SIGHTING
RESCUE
AIR,CRA~T:
Conserve
aircraft
battery.
Do
not activate radio
transceiver.
(4)
AFTER
SIGHTING
.RESCUE AIRCRAFT: Place ELT function
selector switch in the OFF position, preventing radio
interference.
Attempt contact with
rescue
aircraft
with the
radio
~
transceiver
set
·
to
a frequency of 121. 5 MHz.
If
no
contact
is
established,
return
the function
selector
switch to
ON
immediately.
(5)
FOLLOWING
RESCUE: Place ELT function
selector
switch in
the
OFF position, terminating emergency
transmissions.
(6)
INADVERTENT
ACTIVATION: Following a lightning
strike
or
an
exceptionally hard landing, the ELT may activate although
no
emer-
gency
exists. Select 121. 5
MHz
on
your radio
transceiver.
'
If
the
ELT
can be heard transmitting, place the .function
selector
· switch' in
the
OFF position; then immediately·
return
the switch to
ARM.
3-11

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