cleaning. Do not use it on painted surfaces. Safety
solvent is not suitable for oxygen systems. It can be
used for other cleaning in ultrasonic cleaning devices.
Apply it by wiping, scrubbing, or booth spraying. The
term safety solvent is derived from its high flash point.
Many later-issue maintenance manuals refer to safety
solvent as 1,1,1-trichloroethane.
Methyl Ethyl Ketone (MEK). Methyl ethyl ketone
(MEK) is a cleaner for bare-metal surfaces and areas
where MIL-S-8802 sealant is to be removed.
Normally, you apply MEK over small areas with
wiping cloths or soft bristle brushes.
Avoid prolonged breathing and skin con-
tact of MEK. Use MEK only in well-venti-
lated spaces. Use extreme care when working
around transparent plastics because MEK
will damage them upon contact.
Trichloroethane. This is a nonflammable
degreasing agent for cleaning oxygen systems
equipment. It can be harmful to paint and plastic
materials and since its vapors are heavier than air, it
will displace oxygen in poorly ventilated areas.
Ammonium Hydroxide. Normally, you use
ammonium hydroxide in the lavatories of aircraft to
neutralize urine and waste products. Use a sponge to
apply it, and then flush the area with fresh water.
Sodium Bicarbonate. Sodium bicarbonate also
neutralizes urine deposits. You apply it with a sponge,
and then flush the area with fresh water. Sodium
bicarbonate is also a neutralizing agent for sulfuric
acid battery electrolyte deposits.
Sodium Phosphate. Sodium phosphate neutralizes
electrolyte spills from nickel-cadmium batteries.
Remove spilled electrolyte immediately by flushing
with fresh water. Neutralize the area by sponging
generously with sodium phosphate solution and then
flush with fresh water. Dry with clean wiping cloths.
Aqueous Film-forming Foam. Aqueous
film-forming foam is commonly known as AFFF. Use
it for removing fire-extinguishing agent MIL-F-24385
from aircraft surfaces. Complete details for the use of
AFFF as a cleaning agent are in Aircraft Weapons
System Cleaning and Corrosion Control. NAVAIR
Aircraft Surface Cleaning
Maintenance personnel use water emulsion
cleaners to clean aircraft. These cleaners disperse
contaminates into tiny droplets that are held in
suspension. The droplets of this cleaner are then
flushed from the surface. MIL-C-43616 water
emulsion compounds contain emulsifying agents,
coupling agents, detergents, solvents, corrosion
inhibitors, and water. Use these compounds on painted
and unpainted surfaces in heavy-duty cleaning
operations, when materials of lower detergency are not
effective. Use these compounds in varying
concentrations, depending upon the condition of the
Apply water emulsion cleaner by starting at the
bottom of the area being cleaned. You may apply the
mixed solution by spraying or brushing to avoid
streaking. Loosen surface soils by mild brushing or
mopping. Then, give the surface a thorough fresh
water rinse by using an automatic shutoff-type water
spray nozzle. This type of nozzle gives hand control
from a light mist or fogging spray to a full spray with
Aircraft cleaning compound MIL-C-85570 is the
primary cleaning compound used on naval aircraft.
The five types of MIL-C-85570 are discussed in the
TYPE I is for cleaning painted and unpainted
aircraft outdoors or where enough ventilation is
available. It may be used to clean either high-gloss or
tactical paint systems.
TYPE II is for cleaning painted and unpainted
aircraft indoors and in areas of limited ventilation. It
is for cleaning either high-gloss or tactical paint
systems. Type II is not as good as type I for these
purposes. It may also be used outdoors.
TYPE III is a mild abrasive cleaner. It is used
undiluted for spot cleaning high-gloss paint systems,
such as exhaust tracks, shoe scuff marks, and other
areas where types I and II are not effective.
TYPE IV is a spot cleaner for Tactical Paint
Scheme (TPS). For spot cleaning embedded soils on
TPS systems without changing the paint finish.
TYPE V is for cleaning heavy soils, such as
carbonized oil, aged preservatives, grease, and gun
blast and exhaust deposits. This cleaner clings to