Cessna 177 SERIES Service Manual

3/4" Max.
it
STAIN
Size will vary
.
RUNNING
with
location
LEAK
and intensity.I
'"
*
.
,'l Em
AFuel
will usually
flow
in
this area
along skin
con-
tour after it is wiped dry.
1 1/24 to VI4"-
HEAVY
--
'
SEEP
_]__-_'_-_---iuFuel
usually drips
-WARNING|
at this
point.
REFER TO PARAGRAPH
12-13 FOR FUEL
BAY PURGING WHICH
SHOULD BE ACCOMPLISHED
BEFORE REPAIRING
FUEL BAYS.
Figure 12-4. Classification of Fuel Leaks
b. Remove seats, carpeting
and access plates as recommended
that the "umbrella-shaped" check valve
necessary for access to union and reservoir tank. (vent) installed in vented-type caps be removed, in-
(Refer
to figure 12-2A. )
spected and replaced,if necessary, whenever
the fuel
c.
Disconnect
tube
at union
and reservoir
tank,
cap is
inspected.
Removal
or installation
of this
and
remove tube.
small rubber
valve is facilitated if the
valve stem is
d.
Reverse
preceding
steps for
installation.
lubricated
with hydraulic
fluid
(MIL-H-5606
or
equiv-
alent).
12-81.
REMOVAL AND
INSTALLATION OF DRAIN
FITTING.
(Detail
'T',
figure
12-2B.)
129. FUEL
BAYS.
a. Break
safety wire
at drain
fitting in
lower wing-
to-fuselage fairing.
12-10.
DESCRIPTION. Aircraft
with cantilever
b. Remove fairing
and drain
fuel from fitting.
wings
have an inboard
section of
each wing, forward
(Observe
precautions
outlined in
paragraph 12-3.)
of the
main spar, sealed
to form an
integral fuel bay
c. Disconnect
vent lines
from tee (7).
area. The
bay consists
of a front and rear
fuel spar,
d. Remove bolt,
nut and washer
from bracket
(4). inboard,
outboard and
intermediate
ribs and stringers.
e.
Remove drain
fitting.
Usable
fuel in each bay
configuration
is shown in fig-
f. Reverse
preceding
steps for installation.
ure 1-1.
A 22 gallon marker,
in the form
of a series
of
small
holes just
inside
the filler
neck,
is provided
NOTE
to
facilitate fueling
to reduced fuel
loads.
Be sure to safety wire drain fitting in lower 12-11. FUEL BAY LEAKS.
wing-to-fuselage
fairing.
12-12.
CLASSIFICATION
OF FUEL
LEAKS.
Fuel
12-8J.
FUEL BAY CAPS. Flush-type fuel bay caps
leaks which do not constitute a flight
hazard are
are incorporated on all aircraft; early serials
thru stains, seeps and heavy seeps
NOT in an enclosed
17701597 utilizing unvented style caps, while aircraft area. However, they should be repaired when the
serials beginning with 17701598 thru 17702526 use aircraft is grounded for other maintenance. Fuel
vented caps. Beginning with aircraft serial 17702527 leaks which constitute a flight hazard are running
fuel bay caps do not incorporate vents. Due . to the leaks in any area, seeps, heavy seeps, or stains in
importance of maintaining proper fuel cap sealing, it an enclosed area, such as the wing leading edge, the
is recommended that caps be inspected and cleaned sections of wing inboard and outboard of the fuel bay
on an as required basis. Refer to Cessna Single and the area between the rear fuel spar and the main
Engine Service Letter SE76-8 for detailed fuel cap spar. These leaks must be repaired before that bay
inspection and cleaning procedures. In addition it is is used for another flight. The wet or stained spot
Change 7 12-7

Cessna 177 SERIES Specifications

General

Manufacturer	Cessna
Engine Type	Piston
Wingspan	35 ft 6 in (10.82 m)
Seating Capacity	4
Number Built	4, 295
Engine	Lycoming O-360
Horsepower	180 hp
Maximum Takeoff Weight	2, 500 lb (1, 134 kg)