NAVAIR 01-1A-509-3
01 March 2005
TM 1-1500-344-23-3
TO 1-1-689-3
9-2.7.1.1. Clean surface of dirt, soil, contaminants,
9-2.5. WHAT NOT TO PRESERVE. The following
and corrosion products as specified in Chapter 6.
items shall not be preserved or come in contact with
preservatives:
9-2.7.1.2. When necessary, apply pressure sensitive
tape, SAE-AMS-T-21595 Type I (Volume IV or V,
a. Laminated circuit boards that are conformal
Chapter 2), to all components not to be preserved
coated.
(refer to paragraph 9-2.5. for list of items).
b. Nonmetallic surfaces such as control box
faceplates (acrylic).
c. Tunable capacitors and inductors.
Compound, Corrosion Preventive
3
Water-Displacing
d. Internal surfaces of waveguides.
MIL-C-81309
e. Internal surfaces of tuned tanks.
9-2.7.1.3. Apply an even, thin film to the surface.
Ensure thorough coverage of dissimilar metal surface
f. Relay and circuit breaker contacts.
contact areas, crevices, and water entrapment areas.
Avoid excessive application. Preservative will penetrate
g. Fuses.
into crevices.
NOTE
9-2.7.1.4. Remove pressure sensitive tape, as
applicable.
Only preservative materials approved by the
parent service organization shall be used on
9-2.7.2. M I L - P R F - 1 6 1 7 3 . Corrosion preventive
military aircraft and avionic systems. Volume IV
compound, MIL-PRF-16173 Grade 4 (Volume IV or V,
and V are provided to ensure the availability of
Chapter 2), shall be applied as follows:
approved materials and equipment.
9-2.7.2.1. Clean surface of dirt, soil, and corrosion
9-2.6. PRESERVATIVE MATERIALS. Preservatives
products as specified in Chapter 6.
may also act as water-displacing materials (refer to
paragraph 9-2.7.1.) and lubricants. Table 9-1 contains
a list of authorized preservative compounds for avionic
equipment.
Compound, Corrosion Preventive
3
Water-Displacing
9-2.7. HOW TO PRESERVE. The various specific
MIL-C-81309
applications of preservatives are covered in Chapter 6.
The following are general application procedures that
9-2.7.2.2. A p p l y water-displacing compound,
apply in most cases.
MIL-C-81309 Type II (Volume IV or V, Chapter 2) or
MIL-L-87177 (Air Force only, Volume V, Chapter 2) as
CAUTION
specified in paragraph 9-2.7.1. prior to applying
MIL-PRF-16173.
Extreme care should be taken when applying
the corrosion preventative compounds,
9-2.7.2.3. When necessary, thin corrosion preventive
MIL-PRF-81309 or MIL-L-87177, to avoid
compound, MIL-PRF-16173 Grade 4 (Volume IV or V,
contact with plastics such as polysulfone,
Chapter 2) with degreasing solvent, MIL-PRF-680
polycarbonate, and acrylic. Such contact will
Type III (Volume IV or V, Chapter 2) to working
crack or craze these plastics.
viscosity.
9-2.7.1. MIL-C-81309/MIL-L-87177. Water-displacing
corrosion preventive compounds, MIL-C-81309 Type II
or III (Volume IV or V, Chapter 2) or MIL-L-87177 (Air
Force only, Volume V, Chapter 2) shall be applied as
follows:
9-2