Cessna 177 SERIES Service Manual

19-6. CLEAN
UP.
a.
Inspect aircraft
for any surface
defects, such
as
WARNING
dents or unsatisfactory previous repairs, and correct
according to Paragraph
19-13. AIRCRAFT
SHOULD BE GROUNDED PRIOR
b. Wipe excess sealer from around
windows and skin TO PAINTING
TO PREVENT STATIC ELEC-
laps. Mask windows, ABS parts, and any
other areas TRICITY BUILDUP
AND DISCHARGE.
not to be primed, with 3M tape and Class A Solvent
Proof Paper. Care must be exercised to avoid cuts, 19-8. PRIMING.
scratches or gouges by
metal objects to all plexiglass a. Apply
primer in one wet even coat. Dry film
surfaces, because cuts and
scratches may contribute thickness
to be 0.0003 to 0.0005 inch. Do not top-
to crazing, and failure of plexiglass
windows. coat until sufficiently
cured. When scratching with
c. Methyl Ethyl Ketone (MEK) solvent should
be firm pressure of the fingernail
does not penetrate
used
for final cleaning of aircraft prior to painting.
the coating, the primer is cured. Primer
should be
The wiping cloths
shall be contaminant and lint free
topcoated within four hours after application.
Hex wiping cloths. Saturate cloth in solvent and wring
out
so it does not drip. Wipe the aircraft
surface with 19-9. PRE-PAINTING.
the cloth in one
hand, and immediately dry with a clean
a. On standard aircraft mix the required amount
of
cloth in the other hand.
It is important to wipe surface Imron with
Imron 192S activator in a 3 to 1 ratio.
dry before solvent evaporates.
Mix thoroughly, (no
induction time required before
spraying). Imron shall be thinned with Y8485S Imron
When
an aircraft has paint or zinc chromate over-
reducer to obtain a spraying viscosity
of 18 to 22
spray on the exterior, stripper may
be used to re- seconds on a No.
2 Zahn Cup. Viscosity should be
move the overspray. The stripped may be applied checked after 4 hours and adjusted if necessary.
by brush and will require
a few minutes to soften the b. When
applying modified urethane finishes, the
overspray.
Heavy coatings may require more than
painter should wear an approved respirator,
which
one application
of the stripper, Use extreme care to
has a dust filter and organic vapor cartridge, or
an
prevent stripper from running
into faying surfaces on air supplied
respirator. All modified urethane fin
corrosion
proofed aircraft. After removal of the
ishes contain some isocyanate, which may
cause irri-
overspray, clean the aircraft with Methyl Ethyl Ke- tation to the respiratory tract, or an allergic reaction.
tone (MEK' solvent in the prescribed manner. Individuals may become sensitized to isocyanates.
c.
The pot life of the mixture
is approximately
6 to 8
NOTE
hours
at 75°F. Pot pressure
should be approximately
12
psi during
application.
Air
pressure
at the
gun
It is imperative that clean solvent be used in should be 40 to 50 psi.
cleaning aircraft.
Dispose of contaminated
d. Scuff sand the primer only where runs or
dirt
solvent immediately. Fresh solvent should particles are evident. Minor roughness or grit may
be used on each aircraft.
be removed
by rubbing the surface with brown Kraft
paper which has been thoroughly wrinkled. Unmask
WARNING
ABS and other pre-primed
parts and check tapes.
Clean surface with a jet of low pressure dry air.
Use explosive proof containers for storing
wash solvents and other flammable
materials. 19-10. PAINTING ALLOVER
WHITE OR COLOR.
a. Complete painting of the aircraft should be done
19-7. PRE PRIMING.
with 2
or 3 wet, even coats. Dry coats will not re-
a. For all standard aircraft, P60G2 primer shall flow, and will leave a grainy appearance.
be mixed one part primer to one and one half parts b. Allow 5 minutes period for the finish to flash off
R7K44 catalyst by volume. Mix only in stainless before moving aircraft to the oven.
steel or lined containers. After mixing, allow c. Move to the force dry oven and dry for approxi-
primer to set for thirty minutes before spraying. mately 1 1/2 hours at 120OF to 140°F.
Pot life of mixed primer is six hours. All mixed d. Dry film thickness of the overall color should be
material should be discarded if not used within this between 1.3 to 2.0 mils. Films in excess of 3.0 mils
time. Pot pressure during spray operation should are not desirable.
be approximately 0lpsi, + 1 or -Ipsi. Air pressure
should be 40 to 50psi at the gun. Blow loose contaminant 19-11 MASKING FOR STRIPS.
off the aircraft with a jet of clean, dry air. Cover the a. Remove aircraft from oven. Allow aircraft
flap tracks, nose gear strut tube, wheels, and to cool to room temperature before masking.
shimmy dampener rod ends. ABS parts and other b. Mask stripe area using 3M Tape Y231 or 3M Tape
pre-primed parts do not
receive wash primer Y218, and
Class A solvent proof paper. Double tape
all skin to prevent blow by.
19-4 Change
19-4 Change 8

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)