01 March 2005
NAVAIR 01-1A-509-3
TM 1-1500-344-23-3
TO 1-1-689-3
(Volume IV or V, Chapter 2) to remove Water Displacing
CAUTION
Corrosion Preventive Compound. Wipe with Isopropyl
Cleaning compounds and solvents identified
Alcohol, TT-I-735 (Volume IV or V, Chapter 2). This is
in Volume IV and V may react with some
necessary or contacts will not function electrically.
encapsulants or plastics used to form wire
harness tubing, wire coatings, conformal
6-3.8. EDGE CONNECTORS AND MATING PLUGS.
coatings, gaskets, and seals. Test on a small
Edge connectors on printed circuit boards (PCBs)
area for softening or other adverse reactions
pose a particular corrosion problem because of the
prior to general application. Refer to Table 2-4
thinly plated surfaces. Most plugs and connectors
for further restriction on these materials.
used in microminiature circuit boards are plated with
thin layers of gold. This gold is porous and moisture will
c. Switches shall be preserved as follows:
penetrate to the base metal causing corrosion. In
addition, the very function of cleaning may create
scratches in the plated surfaces which will accelerate
the problem. Remove corrosion and preserve as
follows:
Compound, Corrosion Preventive
3
Water-Displacing
a. Remove corrosion and tarnish by rubbing
MIL-C-81309
affected area with Eraser, Magic Rub Plastic (Volume IV
or V, Chapter 2). Care should be taken not to remove
(1) Apply a thin film of Water Displacing
thinly plated surfaces.
Corrosion Preventive Compound, Ultra-Thin Film,
Avionics Grade, MIL-C-81309 Type III (Volume IV or
V, Chapter 2), to switch assembly. Cockpit and control
box mounted switches shall not be preserved on the
exposed actuating arm or toggle. This area should be
Alcohol, Isopropyl
6
left clear of preservative so as not to hinder flight crew
TT-I-735
operation.
Solvent, Degreasing
7
Alcohol, Isopropyl
6
MIL-PRF-680
TT-I-735
b. Apply Degreasing Solvent, MIL-PRF-680 Type III
(Volume IV or V, Chapter 2) with Acid Brush, A-A-289
(Volume IV or V, Chapter 3). Rinse affected area with
I s o p r o p y l Alcohol, TT-I-753 (Volume I V or V,
Solvent, Degreasing
7
Chapter 2), and wipe with Cleaning Cloth, CCC-C-46
MIL-PRF-680
Class 7 (Volume IV or V, Chapter 2).
NOTE
c. Allow components to air dry.
After application of preservative to open switch
d. Edge connectors shall be preserved as follows:
assemblies, it is necessary to remove the
preservative from the sliding contacts, cams,
and contact points.
Compound, Corrosion Preventive
3
(2) Wipe the sliding contacts, cams, and contact
Water-Displacing
points of open switches with Cleaning Cloth, CCC-C-46
Class 7 (Volume IV or V, Chapter 2), Applicator, Cotton
MIL-C-81309
Tipped (Volume IV or V, Chapter 3), or Pipe Cleaner
(Volume IV or V, Chapter 3), as applicable, dampened
(1) Spray a thin film of Water Displacing
with Degreasing Solvent, MIL-PRF-680 Type III
Corrosion Preventive Compound, Ultra-Thin Film,
Avionics Grade, MIL-C-81309 Type III (Volume IV or
6-28