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Cessna 150M - Page 245

Cessna 150M
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NOTE
After
accumulated
test
or
operation
time
equals
1
hour,
battery-pack
replacement
is
required.
f.
Check
calendar
date
for
replacement
of
battery-
pack.
This
date
is
supplied
on a
sticker
attached
to
the
outside
of
the
ELT
case
and
to
each
battery.
16-79.
REMOVAL
AND
INSTALLATION
OF
TRANS-
MITTER.
(Refer
to
figure
16-11.
)
a.
Remove
baggage
curtain
to
gain
access
to
the
transmitter
and
antenna.
b.
Disconnect
co-axial
cable
from
end
of
transmit-
ter.
I
c. Depending upon the
particular
installation,
either
cut
four
sta-straps
and
remove
transmitter
or
cut
sta-strap
securing
antenna
cable
and
unlatch
metal
strap
to
remove
transmitter.
NOTE
Transmitter
is
also
attached
to
the
mounting
bracket
by
velcro
strips;
pull
transmitter
to
free
from
mounting
bracket
and
velcro.
NOTE
To
replace
velcro
strips,
clean
surface
thor-
oughly
with
clean
cloth
saturated
in
one of
the
follOwing
solvents:
Trichloric
thylene,
Ali-
phatic
Napthas,
Methyl
Ethyl
Ketone
or
En-
mar
6094
Lacquer
Thinner.
Cloth
should
be
folded
each
time
the
surface
is
wiped
to
pre-
sent
a
clean
area
and
avoid
redepositing
of
grease.
Wipe
surface
immediately
with
clean
dry
cloth,
do not
allow
solvent
to
dry
on
sur-
face.
Apply
Velcro
#40
adhesive
to
each
sur-
face
in
a
thin
even
coat
and
allow
to
dry
until
quite
tacky,
but no
longer
transfers
to the
finger
when
touched
(usually
between
5 and
30
minutes).
Porous
surfaces
may
require
two
coats.
Place
the two
surfaces
in
contact
and
press
firmly
together
to
insure
intimate
contact.
Allow 24
hours
for
complete
cure.
d.
To
reinstall
transmitter,
reverse
preceding
steps.
NOTE
An
installation
tool
is
required
to
properly
secure
sta-straps
on
units
installed
with
sta-straps.
This
tool
may
be
purchased
locally
or
ordered
from
the
Pandiut
Cor-
poration,
Tinley
Park,
Ill.,
part
number
GS-2B
(Conforms
to MS90387-1).
ICAur)ojll
\
Ensure
that
the
direction
of
flight
arrows
(placarded
on the
transmitter)
are
pointing
towards
the
nose
of
the
aircraft.
16-80.
REMOVAL AND INSTALLATION
OF
ANTEN-
NA.
(Refer
to
figure
16-11.
)
a.
Disconnect
co-axial
cable
from
base
of antenna.
b.
Remove
the
nut
and
lockwasher
attaching
the
antenna
base
ot
the
fuselage
and
the
antenna
will
be
free
for
removal.
c.
To
reinstall
the
antenna,
reverse
the
preceding
steps.
NOTE
Upon
reinstallation
of
antenna,
cement
rubber
boot (14)
using
RTVI02,
General
Electric
Co.
or
equivalent,
to
antenna
whip only; do
not
apply
adhesive
to
fus-
elage
skin
or
damage
to
paint
may
result.
In-service
6
cell
magnesium
battery-pack
powered
ELT's
require
the
installation
of a
static
electricity
suppressor
in
the
antenna
cable
to
prevent
the
possibility
of
damage
to
the
case
of
the
ELT.
Refer
to
Cessna
Avion-
ics
Service
Letter
A V74-16
and
figure
16-11.
16-81.
REMOVAL AND INSTALLATION OF MAG-
NESIUM
SIX
(6)
CELL
BATTERY-PACK.
(Refer
to
figure
16-12.
)
NOTE
Since
replacement
6
cell
magnesium
battery-
packs
are
no
longer
available,
when
in-
service
units
require
replacement,
use
the
4
cell
lithium
battery-pack.
Refer
to
para-
graph
16-82.
ELECTRICAL
CONNECTOR
TRANSMITTER
C 589510-0102
BATTERY-PACK
C589510-0105
(6
Cell
Magnesium)
Figure
16-12.
Magnesium
6
Cell
Battery-Pack
Installation
16-82.
REMOVAL
AND
INSTALLATION
OF
LITHIUM
FOUR
(4)
CELL
BATTERY-PACK.
(Refer
to
figure
16-13.)
NOTE
Transmitters
equipped
with
the
4
cell
battery-
pack
can
only
be
replaced
with
another
4
cell
battery-pack.
Change
3
16-33

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