Cessna 172P - Page 267

PILOT'S
OPER,ATING
HANDBOOK
SUPPLEMENT
11
EMER,GENCY
LOCATOR,
TR,ANSMITTER
(EI,T)
SUPPLEMENT
EMERGENCY LOCATOR
TRANSMITTER
(ELT)
sEcTroN
I
GENERAL
The ELT
consists of a solf-containod
dual-frequency
radio
transmitter
and battery
power
supply,
and is activated
by an
impact of 5g
or more
as
may be experienced in a
crash
landing. The ELT emits
an omni-directional
signal on tho international distress
frequoncies
of 121.ã
and 243.0
MHz.
(Some
ELT
units in export airoraft transmit
only on
121.5 MHz.)
General
aviation
and commorcial aircraft,
the FAA,
and
CAP
monitor
121'5
MHz'
and 243.0 MHz is
monitored
by the military.
Following a
crash
landing,
the
ELT
will
provide
line-of-sight transmission
up
to
100
miles at
10,000
feet.
The ELT
supplied
in domestic
aircraft transmits on both
distress
frequen-
cies
simultaneously
at ?5
mw rated
power
output for
5O continuous
hours
in the temperature ra,nge of
-4oF
to
+131oF
(-20oC
to
+55oC).
The
ELT unit
in
export
aircraft transmits on
121.5 MHz
at
25 mw rated
power
output
for
50
continuous hours in the temperature ra,nge
of
-4oF to
+131oF
(-20'C to
+5õ'C).
The
ELT is readily identified
as
a bright orange
unit mounted
on
the
right hand
side of the baggage compartmont
wall in
the tailcone.
To
gain
access to the unit, remove
the
oover.
The
ELT is operated
by
a
control
panel
at
the forward
facing end
of
the
unit
(see
figure
1).
sEcTroN 2
LIMITATIONS
The
following information
must
be
presented
in the
form of
a
placard
located
on the baggage compartment
wall.
EMER,GENCY LOCATOR
TR,ANSMITTER
INSTALLED
BEHIND
THIS
COVER.
MUST BE SER,VICED IN
ACCORDANCE
WITH FAR,91.52
30
May 1980
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