Cessna 177 SERIES Service Manual page 22

NOTE
NOTE
Corrosion preventive mixture consists of one
The corrosion-preventive mixture is harmful
part compound MIL-C-6529, Type I, mixed
to paint and should be wiped from painted sur-
with three parts new lubricating oil of the
faces immediately.
grade recommended for service.
Lycoming
recommends Esso Rust-Ban 628 or equivalent. o.
Attach a warning placard on the throttle control
During all spraying operations, corrosion mix-
knob, to the effect that the engine contains no lubri-
ture is preheated to 221
C
to 2500 F.
cating oil.
Placard the propeller to the effect that it
should not be moved while the engine is in storage.
c. Immediately after filling the oil sump with cor-
p.
Prepare airframe for storage as outlined in
rosion preventative mixture, fly the aircraft for a
paragraph 2-10 thru step "f".
period of time not to exceed a maximum of 30 min-
utes.
NOTE
d.
With engine operating at 1200 to 1500 rpm and
induction air filter removed, spray corrosion pre-
As an alternate method of indefinite storage,
ventive mixture into induction airbox, at the rate of
theaircraft may be serviced in accordance
one-half gallon per minute, until heavy smoke
with paragraph 2-10 providing the aircraft is
comes from exhaust stack, then increase the spray
run-up at maximum intervals of 90 days and
until the engine is stopped.
then reserviced per paragraph 2-10.
CAUTION
2-14. INSPECTION DURING STORAGE. Aircraft
Injecting corrosion-preventive mixture too
in indefinite storage shall be inspected as follows:
fast can cause a hydrostatic lock.
a.
Inspect cylinder protex plugs each 7 days.
b. Change protex plugs if their color indicates an
unsafe condition.
e.
Do not rotate propeller after completing step unsafe cond
"d. "
c.
If the dehydrator plugs have changed color in one
f.
Remove all spark plugs and spray corrosion-
half of the cylinders, all desiccant material in the
preventive mixture, which has been pre-heated to
engine shall be replaced with new material.
221
°
to 250°F, into all spark plug holes to thorough-
d.
Every 6 months respray the cylinder inteors
ly cover interior surfaces of cylinders.
with corrosion-preventive mixture.
g. Install lower spark plugs or install solid plugs,
NOTE
and install dehydrator plugs in upper spark plug
holes. Be sure that dehydrator plugs are blue in
color when installed.
Before spraying, inspect the interior of one
h. Cover spark plug lead terminals with shipping
cylinder for corrosion through the spark
plugs (AN4060-1) or other suitable covers.
plug hole and remove at least one rocker box
i.
With throttle in full open position, place a bag
cover and inspect the valve mechanism.
of desiccant in the carburetor intake and seal open-
ing with moisture resistant paper and tape.
2-15.
RETURNING AIRCRAFT TO SERVICE.
After
j.
Place a bag of desiccant in the exhaust tail-
indefinite storage, use the following procedure to
pipe(s) and seal openings with moisture resistant
return the aircraft to service.
tape.
a.
Remove aircraft from blocks and check tires for
k.
Seal cold air inlet to the heater muff with mois-
correct inflation. Check for correct nose gear strut
ture resistant tape.
inflation.
1.
Seal engine breather by inserting a protex plug b.
Check battery and install.
in the breather hose and clamping in place.
c.
Remove all materials used to seal and cover
m. Seal all other engine openings exposed to atmos- openings.
phere using suitable plugs or non-hygroscopic tape.
d.
Remove warning placards posted at throttle and
propeller.
NOTE
e.
Remove and clean engine oil screen, then re-
install and safety.
On aircraft that are equipped
Attach a red streamer to each place plugs or
with an external oil filter, install new filter element.
tape is installed. Either attach red streamers
f.
Remove oil sump drain plug and drain sump.
outside of the sealed area with tape or to the
Install and safety drain plug.
inside of the sealed area with safety wire to
prevent wicking of moisture into the sealed
NOTE
area.
The corrosion-preventive mixture will mix
n.
Drain corrosion-preventive mixture from engine
with the engine lubricating oil. so flushing
sump and reinstall drain plug.
the oil system is not necessary. Draining
the oil sump will remove enough of the cor-
rosion-preventive mixture.
Change 6 2-5