Detergent Cleaning With
Use this method only when water is limited.
Prepare the aircraft for cleaning. Then mix the
proper amounts of aircraft cleaning compound and
water in a bucket.
Apply the cleaner with a scrub brush, sponge,
rag, or cleaning and polishing pad. Apply to one small
area at a time.
Scrub the area. Then remove the cleaner and
loosened soils with a cloth.
For soils that are resistant to the limited water
procedure, clean with dry cleaning solvent (P-D-680,
Type II or III) then repeat with the cleaning compound
and water mixture.
Apply water displacing, ultrathin, film corrosion
preventive compound MIL-C-81309, type II, and wipe
with a clean, dry cloth.
Waterless Wipedown Cleaning
Use waterless wipedown procedures only when
water is not available for rinsing or when cold weather
prevents the use of water. Using a plastic spray bottle,
apply MIL-C-85570, Type I or II (mixed IAW
NAVAIR 01-1A-509). Alternatively, spray the
cleaner from an aerosol can and wipe off contaminates
from the surface.
Spot clean light, oily, soiled surfaces by wiping
with dry-cleaning solvent. Apply the solvent by using
a saturated wiping cloth. Brush or wipe the surface as
necessary; then wipe clean with a dry cloth. The
solvent wipe may leave a light residue. Remove this
residue with soap and water, followed by a fresh water
NOTE: After cleaning an aircraft, relubricate it as
specified by the MRCs. Ensure that all low-point
drains are open, covers and shrouds are removed, and
that aircraft preservatives are applied to clean,
exposed, unpainted surfaces. Also make sure that the
felt wiper washers on all hydraulic cylinders are
moistened, and wipe down actuating cylinder rods
with a clean rag saturated with hydraulic fluid.
Remove and replace damaged or loosened sealant as
specified by the applicable MIM.
Q27. Why is the conformable applicator cleaning pad
better than a mop or bristle brush when cleaning
Q28. Types I, II, and IV of what cleaning compound
are to be used on tactical paint schemes?
What is the first step in efficiently cleaning an
Q30. When cleaning an aircraft what are the two
directions in which cleaning compound and
rinsing are applied?
What substance may be used to spot-clean lightly
Dust and contamination cause corrosion problems
in avionics equipment. Cleaning prevents many of
these problems. Therefore, cleaning is the first logical
step after an inspection. Cleanliness is very important
in maintaining the functional integrity and reliability
of avionic systems. Dirt may be either conductive or
insulating. As a conductor, it may provide an
undesired electrical path. As an insulator, it may
interfere with proper operation. Dust, fingerprints,
surface oxides, contaminants, or other foreign material
on a surface can undo all the good provided by
A good maintenance practice is to use the mildest
cleaning method that will properly decontaminate the
equipment. It is also important to use the correct
cleaning solutions and cleaning materials to avoid
damage to avionics equipment. Some of the hazards
associated with the cleaning of electronic and
electrical equipment are as follows:
Cleaning solvents or materials can be trapped in
crevices or seams. This interferes with later
applications of preservative coatings and causes
corrosion as well.
Vigorous or prolonged scrubbing of laminated
circuit boards can damage the boards.
Certain cleaning solvents soften conformal
coatings, wire coverings, acrylic panels, and
some circuit components.
Dry-cleaning solvent should not be used in
oxygen areas or around oxygen equipment. Dry-
cleaning solvent is NOT oxygen compatible and
will cause explosion and/or fire.