Cessna 182 1978 - Auxiliary Fuel Pump on Turbo Equipped Airplanes; Fuel Bay Purging; Integral Fuel Bay Sealant

MODEL
182
& T182
SERIES
SERVICE
MANUAL
1. Hose
(Fuel Outlet)
2. Fitting 2
3. Jam Nut
4. O-Ring
3
12
5. Fitting
6.
Hose
(Fuel
Inlet)
7. Fitting
8. Drain Line
9.
Fuel Pump
10.
Mount Bracket
11. Screw
12.
Clamp
6
Figure 12-9. Auxiliary Fuel Pump
on Turbo Equipped Airplanes.
If a
leak causing
a flight hazard
should
occur at a
Since
argon or
carbon dioxide
are heavier
than air,
place
where there
are no
facilities available
to
these
gases
will remain
in the bay during
the repair.
make
an acceptable
repair, it is
recommended that
The
repair shall be
made using non-sparking
tools
the
leaking bay
be drained
and some
suitable
ma-
(air
motors,
plastic scrapers,
etc.)
terial
placed over the
leak, if it is within an
en-
closed area of the wing, to eliminate
escaping
NOTE
fumes. By switching
the fuel selector
valve to the
other
bay,
the aircraft
can
then be flown
to a
base
Portable
vapor detectors
are available
to
where
the fuel
leak can
be repaired.
determine
presence
of explosive
mixtures
and are calibrated for leaded fuel. These
12-43.
FUEL
BAY PURGING.
detectors
can be
used to
determine
when
it is
safe
to
make
repairs.
12-44.
INTEGRAL
FUEL
BAY
SEALANT.
Two kinds
of sealants
are
used, one
to seal the
fuel bay and
the
Purge fuel bays with an inert gas prior to
repairing fuel leaks, to preclude the possi- other to seal the access doors and fuel quantity trans-
repairing fuel leaks, to preclude the possi-
bility
of
explosions.
pliable and will not adhere to metal as firmly as the
bay sealant does. This permits the access doors and
The following
procedure may be
used to purge the
fuel quantity transmitter
adapter to be removed
with-
bay with argon
or carbon dioxide.
out damage to them. Service
Kits SK210-56 (6-ounce
a. Ground the aircraft to a suitable
ground stake. tube) and SK210-101
(2.5-ounce tube), which re
b. Place fuel
selector in the OFF
position, and
available from the Cessna
Supply Division,
con-
leave in this position
throughout all remaining
steps. tain
these sealants with the
proper quantity of
accelerator for each sealant. The sealants can be
c. Drain
all fuel from bay being
repaired. (Observe
identified by color.
The bay sealant is
white and
the precautions in paragraph 12-3.)
its accelerator is a black
paste. The access door
d. Remove access
door and insert hose
into bay.
sealant is grey and its
accelerator is a clear
e. Allow
inert gas
to flow into
bay for several
min-
liquid.
utes (time
dependent
upon
hose size,
rate of flow,
etc.)
to remove
all fuel
vapors.
12-24