PS Magazine - TB 43-PS-609
PS, The Preventative Maintenance Monthly
ISSUE 609
AUGUST 2003
Removing Mildew
Mildew may be produced by fungus growing on organic matter that adheres to a
soft paint film or on the paint itself.
Remove mildew by scrubbing with tri-basic sodium phosphate, OS-642, NSN
6810-00-141-6080. Mix 3 pounds per 10 gallons of water and apply to affected
areas. Then, rinse off immediately with clean water and dry with a lint free cloth.
Leaving the solution on a painted surface too long will loosen the paint. To prevent
reoccurence of mildew, you should remove the old paint like it says in TM 1-1500-
345-23 and TM 1-1500-344-23.
Cleaning Plastics
Plastics are composed of different chemical compositions varying widely in
chemical and physical properties.
One plastic may be cleaned by one method, but that method may destroy
another type of plastic. Generally, organic solvents, like petroleum solvents and
mineral spirits paint thinner, should not be used to clean plastic or come in contact
with plastic.
Always clean plastic by wiping with a lint-free cloth or sponge moistened with
clean water, or a solution of 2 ounces of P-D-410 per gallon of water.
Plastics are polished by
rubbing with ground abrasive
technical pumice (SS-P-821).
For other cleaning methods of
certain plastics, check out TM
1-1500-344-23 or TM 1-1500-
343-23, which contain CPCs
and sealants needed to get rid
of fungus and mildew.
PS 609
AUG 03
38
AH-64…
C
orrosion is one nemesis of aircraft. But, now the twins, fungus
and mildew, have
joined the fight. Like a virus, they grow on the inside surfaces of the Apache’s avion-
ics bay, ammo bay and tail boom.
To annihilate these microbiological growths and keep ‘em from coming back to
dine on your bird, use the procedures below.
(As always, follow your TMs warnings and cautions and use protective measures
before cleaning. Wear safety goggles, NSN 4240-00-052-3776 or 4240-01-292-2818,
to shield your eyes from chemical splashes. And always wear rubber gloves, NSN
8415-00-266-8677, when handling chemicals.
When using fungus remover, P-D-410 and mildew remover, OS-642, never mix
them together.)
Removing Fungus Growth
Remove fungus by scrubbing with a solution of 2 ounces of P-D-410, NSN 7930-
00-880-4454, per 1 gallon of water. On unpainted surfaces the scrubbing mixture
won’t remove the fungus. You must remove the fungus like it says in Chapter 5 of TM
1-1500-344-23. After the fungus is removed, rinse the area thoroughly of all residue.
By the way, if you
need corrosion
prevention site
visits or help,
contact the PEO
aviation corrosion
assistance team
hotline at dsn
89
7
-0209, (256)
313-0209
or call sidney
harrison at:
(256) 8
7
6-9034 or
dsn
7
46-9034.
uh-oh!
here
comes
double
trouble!
not to
worry, we’re
ready
for
a fight!
we’ve
got your
back!
Check ammo compartment
for fungus and mildew
Eyeball inside of tailboom
for fungus and mildew
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