PIPER
COMANCHE
SERVICE
MANUAL
roUer or
bl=
iJlatnllll8ll1.
roll
or
press
the
patch 10 !be
ce_led
are.
aad roU or
press
il
down
• half-illch
10
...
iach
acr
....
at
• tima
so
..
!lOt 10
trap
air
bel_
patch
...
d
ceU.
Lay a
S()'
powul
shot
bel
over
patch which
is
prolected
by
a
piece
of Holl8Ad
Cloth
10
preYeD!
slickilli.
Weighl
sh."lId
1101
be
I'BIII",,"
for 6 hOlllll.
7.
Seal
coat
ed
..
of
patch
1/2 ilIch ... ith
OIIe
co.
of U.S.
Rubber
Co.
3230
or MilInesota
MilIilIl
Co.
EC~78
C
....
eol
and
aU ....
the
ce
......
llo
dry thorouably.
b.
lDside
of
CeU.
1. After
the
d_led
are.
h
..
beell patched
011
the
outside
of
Ihe
cell
...
d
the
repair
al-
lowed
10
sl
...
d • millilllum
of
6
hours.
the
ceU
is
thell
re.dy
10
h""e
Ihe
p.tch
applied 011
the
ilIside of
Ihe
ceU.
2.
Liablly
ODd
thoroughly huff a
piece
of
cured
U.S. Rubber
Co.
5200/87
IIYIOll
sandwich
material
1
....
ellough
10
cover
dama
..
al
leaal
2 iach
..
frca
CUI
ill .IIY
direclioo.
Wash buffing
dusl
off palch with Methyl
Elhyl
Kel
....
solutiOll (U .5. Rubber Co. 3339).
3.
CemeD! buffed
side
of
patch ... ith
IWo
coalS
of
black
rabbet cemelll. U.S. Rubber Co.
3230
or
Minnesota MilIilIl Co.
EC~78,
ADd
aUow
each
coal
10
dry 10
10
IS
millUl".
4. Buff
cell
...
10
he
palched
lightly
ODd
thorou&hly ... ith fille emery cloth and then
....
h
off buffilll
dUSI
..
ith Methyl
Ethyl
Kelaae
solllliOll (U .5. Rubber
Co.
3339).
5.
Coal
huffed
....
"ilh
two
coals
of
black
rubber cemeD!, U.S. Rubber Co. 3230
or
MiMe-
sOIa MilIilIl
Co.
EC~78.
and aUow
each
coal
10
dry
10
to
IS minute
•.
6.
Freshen
cemenled
area
of patch
ad
cemented
....
of
ceU
...
ith
Metbyl Ethyl Ketone
soluticxl (U.S. Rubber Co.
3339).
7. While
still
tseky,
.pply
edge
of
p.tch
to
ed
..
of cemellted
are
••
celllerillg palch over
cut
ill
cell.
With.
roUer or
blunl
iIlstrument, roll
or
press
the
p.lch
10
the
cemenled
area
011
the
cell.
Hold perl
of
patch off
the
cemenled
....
and roU
or
~ess
it down • half-inch to an
inch
at
a time
so
..
not
10
trap
.ir
belween
patch
ODd
ceU.
Apply 5().pound
shot
b.g
to
rep.ired
....
a and
do
not
dislurb
for 6 hours.
8.
Seal
coat
patch and
1/2
iIlch
from
edge
of patch
..
ith two
coats
of U.S. Rubber Co.
323
0 or MinDesot.
MilIiIlC
Co.
EC~78
CellleDl.
AUow
the
firsl
coat
to
dry IS millUles
or
more and
the
second
coal
to
dry
12
hours
or more
so
th.1 wben the
ceU
is
ill
its
folded or original
poaition
the
p.tch
...
a
will
nOl
Slick
to
other
are
..
of
the
cell.
Wipa
palch and
cemented
area
lightly with
number 10
oil.
c.
Scuffed
Fabric.
1. Buff area surroundillg
scuffed
fabric.
2.
W.sh
buffilll
dust
from
area
"ith
3339
solution.
3. Apply two
coats
of
U.S. Rubber Co.
3230
or
Millnesola Mining
Co.
EC-6i8
cement to
the
buffed
area,
aUowille
10
millutes dryillg time
between
co.ts.
8-12.
Fuel
Selector
V.l.e
••
8-13.
R
......
al
01
Fuel
Selector
V.i.e
••
Removal of
the
fuel valve on aU models of Comanche
aircraft are
basically
the
same.
•.
Drain fuel
from
:he
fuel
cells.
b. Remove the fuel
selector
valve
handle.
c.
Remove
the
screws
securing
the
fuel valve protector plate and remove
plate.
If
plate
is
wired with
selector
,witches.
brine
the
plate
straight
up.
beinl
careful
not
to
damage the
switches
FUEL
SYSTEM
ISSUED:
8118172
2
J2
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