Raytheon Beech Baron E55 - Page 431

NOTE
of
these
units results
in
minute
sparks
that
cause
the
formation of
ozone
gas.
Ozone has
a
highly
When
a
malfunctioning
pump
is
replaced,
the
destructive
effect
on
fuel cells.
Although
it
opposing
pump
plus
the
crossfeed
valve
may
be
leaves
no
visible
indication,
ozone
makes
the
utilized
to
drain
the affected
wing,
material of
which
the
cells
are
formed brittle
so
that
the
cells will
disintegrate
upon
the
applica-
tion
of
stress.
b.
After
the
fuel
is
drained,
place
the
fuel
selector
valve
in
the
OFF
position.
c.
Disconnect
all
the
electrical
power
to
the
airplane.
UN~OYAL
FUEL
CELL REPAIR
d. Disconnect
the electrical lead
to
the
pump.
e.
Cut
the
safety
wire
and
loosen
the
mounting
For
information
pertaining
to
the
repair, handling
and
stor-
bracket,
age
of
Uniroyal
Fuel
Cells,
refer
to
Report
FC-1473-73 enti-
f.
Remove
the
plumbing
to
the fuel boost
pump.
tied
"Recommended
Handling
and
Storage
Procedures for
Note
inlet
and
outlet
ports
position
on
pump.
Bladder
Type
Fuel
and
Oil
Cells",
which
is
published
by
g.
Remove
the
retaining
bolts.
Uniroyal
Inc.,
Engineered
Systems
Department.
Mishawa-
h.
Remove
the
pump,
ka,
Indiana.
FUEL
BOOST
PUMP
INSTALLA
TION NOTE
a.
Position
the
pump
in
place,
being
certain
the
inlet
No
repairs
are to
be made
on
the radius of
a
cell
and
outlet
ports
are
in
same
position
as
when
pump
was
or
in
the
fitting
area
of
the
cell,
Cells with
such
removed.
damage
are
to
be
returned
to
Uniroyal
Inc.,
Fuel
b.
Install
the
retaining
bolts.
Cell
Division,
Mishawaka, Indiana,
for
repair.
c.
Connect the
plumbing
and
install
the
bracket.
No
damage
area
larger
than inches
may
be
Safety
wire,
repaired
in
the
field.
d.
Connect the
electrical lead.
GOODYEAR
FUEL CELL
REPAIR
CARE
AND REPAIR
OF FUEL CELLS
For
information
pertaining
to
repair,
handling
and
storage
of
The
following
is
a
recommended
method
of
handling
blad-
Goodyear
Fuel
cells,
refer
to
Manual
AP368
entitled
"Re-
der-type
fuel
cells,
including
storage,
and
post-installation
pair
and
Maintenance
Manual for Vithane
Fuel
Cells".
inspection.
which
is
published
by Goodyear
Aerospace
Corporation.
Engineering
Fabrics
Division, Rockmart,
Georgia.
When
synthetic
rubber
fuel cells
are
placed
in
service,
the
gasoline
has
a
tendency
to extract
the
plasticizer
from the
a.
Chemical
Test.
inner liner
of
the
cell. This extraction
of
plasticizer
is
not
detrimental
as
long
as
gasoline
remains
in
the
fuel
cell,
in
as
i.
Attach
test
plates
to
all
fitting
openings
ex-
much
as
the
gasoline
itself
will
act
as
a
suitable
plasticizer.
cept
one.
2.
Pour
ammonia
on
the
absorbent
cloth
in the
A
thin
coating
of
light engine
oil should be
flushed,
sprayed
ratio
of
3
cc
per
cubic
foot of cell
capacity,
Race the
saru-
or
rubbed
on
the inner liners of
all
serviceable
fuel cells
rated
cloth inside
the
cell
and
install
the
remaining
test
plate.
which
have
contained
gasoline
if
it
is
evident
that the
cells
3.
Make
up
a
phenolphthalein
solution
as
fol-
will remain
without fuel
for
more
than 10
days,
whether
lows:
add
40
grams
phenolphthalein
crystals
to
I/?
gallon
of
installed
in
airplanes
or
not,
or
if
cells
are
to
be
collapsed
or
ethyl
alcohol,
mix,
then add
I/Z
gallon
of
water.
deformed inside their
bays.
The oil
will
act
as a
temporary
4.
inflate
the
cell with air
to
a
pressure
of
1/4
psi
plasticizer
and
will
prevent
the
inner
liner
from
drying
out
maximum.
and
cracking.
5.
Soak
a
large
white
cloth in
the
phenolphtha
lein
solution,
then
wring
it
out
thoroughly
and
spread
it
The
cell
should
not
be
removed
or
handled until
24
hours
smoothly
on
the
outer
surface
of the cell. Press
the cloth
after
the
oil
has been
applied.
down
to
insure
detection
of
minute
leaks.
6.
Check
the cloth for red
spots
which will
indi-
cate
a
leak. Mark
any
leaks
found
and
move
the
cloth
to
a
CAUTION
i
new
location.
Repeat
this
procedure
until
the
entirC
exterior
surface
of
the
cell
has
been covered.
If
red
spots
appear
on
Never store
fuel
cells in
the
vicinity
of
electrical
the
cloth,
they
may
be
removed
by
resoaking
the
cloth
in
the
equipment,
such
as
generators
and
motors.
The
solution.
movement
of
brushes
across
the
commutators
7.
The solution
and
test
cloth
are
satisfactory
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