Indefinite Storage; Inspection During Storage; Servicing; Fuel - Cessna 1969-1976 172 Series Service Manual

1.
m. Seal all other engine openings exposed to atmos-
Seal engine breather by inserting a protex plug
in the breather hose and clamping in place.
phere using suitable plugs
or non- hygroscopic tape.
NOTE
Attach a r e d s t r e a m e r to each place plugs or
tape is installed. Either attach r e d s t r e a m e r s
outside of the sealed area with tape or to the
inside of the sealed area with safety wire to
prevent wicking of moisture into the sealed area.
n. Drain corrosion-preventive mixture from engine
sump and reinstall drain plug.
NOTE
The corrosion-preventive mixture is harmful
to paint and should be wiped from painted sur-
faces immediately.
0 . Attach
a warning placard on the throttle control
knob, to the effect that the engine contains no lubri-
cating oil. Placard the propeller to the effect that it
should not be moved while the engine is in storage.
paragraph 2-10 thru step
"f."
p. Prepare a i r f r a m e for storage as outlined in
NOTE
As an alternate method of indefinite storage,
the aircraft may be serviced in accordance
with paragraph 2-10 providing the aircraft is
run-up
at
maximum intervals of 60 days and
then reserviced per paragraph 2-10.
2-14. INSPECTION DURING STORAGE. Aircraft in
indefinite storage shall be inspected as follows:
a. Inspect cylinder protex plugs each 7 days.
b. Change protex plugs if their color i n q c a t e s an
c. I f the dehydrator plugs have changed color in one
unsafe condition.
half of the cylinders, all desiccant material in the
engine shall be replaced with new material.
with corrosion-preventive mixture.
d. Every 6 months respray the cylinder interiors
NOTE
Before spraying, inspect the interior of one
cylinder for corrosion through the spark
plug hole and remove a t least one rocker box
cover and inspect the valve mechanism.
2-15. RETURNING AIRCRAFT TO SERVICE.
After indefinite storage, use the following Procedure
to return the aircraft t o service.
a. Remove aircraft from blocks and check tires for
correct inflation. Check for correct nose gear s t r u t
inflation.
b. Check battery and install.
c. Remove all materials used to seal and cover
d. Remove warning placards posted at throttle and
e. Remove and clean engine oil screen, then re-
openings.
propeller.
2-6
Change 2
install and safety. On a i r c r a f t that a r e equipped
with an external oil filter, install new filter element.
Remove oil sump drain plug and drain sump.
Install and safety drain plug.
f .
NOTE
The corrosion-preventive mixture will mix
with the engine lubricating oil, s o flushing
the oil system is not necessary. Draining
the oil sump will remove enough of the cor-
r osion-pr eventive mixture.
g. Service and install the induction air filter.
h. Remove dehydrator plugs and spark plugs or
plugs installed i n spark plug holes and rotate pro-
peller by hand several revolutions to clear corrosion-
preventive mixture from cylinders.
plugs to the value listed in Section 11 or 11A.
screen. Check fuel tanks and fuel lines for moisture
and sediment, and drain enough fuel to eliminate.
start
and warm-up engine.
craft.
i.
Clean, gap, and install spark plugs. Torque
j .
Check fuel s t r a i n e r , Remove and clean filter
k. Perform a thorough pre-flight inspection, then
1. Thoroughly clean aircraft and flight test air-
2-16. SERVICING.
2-17.
Servicing requirements are shown in figure
2-4. The following paragraphs supplement this
figure by adding details not included in the figure.
2-18. FUEL. Fuel
tanks
should be filled immedi-
ately
after flight t o reduce condensation. Tank capa-
cities
are listed in figure 1-1. The recommended
fuel grade t o be used is given in figure 2-4.
2-19.
FUEL DRAINS. are located
at
various places
throughout the fuel system. Refer
to Section 12 f o r
location of the various drains in the system. The
s t r a i n e r drain valve is an integral part of the fuel
strainer assembly. The strainer drain
is
equipped
with
a control which
is located adjacent to the oil
dipstick. Access to the control
i s
through the oil
dipstick access door. Remove drain plugs and open
strainer drain
at
the intervals specified in figure
2-4. Also, during daily inspection of the fuel
strainer,
if
water
is
found in the fuel strainer, there
is a possibility that the wing tank sumps o r fuel line
contain water. Therefore, all fuel drain plugs should
be removed and all water drained from the system.
T o activate drain valve for fuel sampling, place cup
up to valve and depress valve with rod protruding
from cup. (Refer to figure 12-3.)
2-20. CARBURETOR DRAIN PLUG INSPECTION.,
In o r d e r to prevent the possibility of thread sealent
contamination in the carburetor float chamber,
cleaning and inspection of the carburetor should be
accomplished
at
each 100-hour inspection and any-
time water in the fuel is suspected.
a. With the fuel valve OFF, remove carburetor
drain plug and clean off any sealant present on the
end of the plug
o r
in the threads on the plug.
I
.
b. Inspect drain plug hole in the carburetor and re-