NAVAIR 01-1A-509-3
01 March 2005
TM 1-1500-344-23-3
TO 1-1-689-3
preventive procedures shall be utilized to minimize
this problem.
Alcohol, Isopropyl
6
TT-I-735
Solvent, Degreasing
7
NOTE
MIL-PRF-680
Replace nuts, bolts, screws and washers which
have the protective coating (normally cadmium)
a. With antenna removed, clean grease, oil, and
worn off. Refer to the applicable service
dirt from aircraft mounting areas with Cleaning Cloth,
directives for information on replacement parts.
CCC-C-46 Class 7 (Volume IV or V, Chapter 2),
dampened with Degreasing Solvent, MIL-PRF-680
a. Clean hardware with Isopropyl Alcohol, TT-I-735
Type III (Volume IV or V, Chapter 2).
(Volume IV or V, Chapter 2), using a Cleaning Cloth,
CCC-C-46 Class 7 (Volume IV or V, Chapter 2).
NOTE
b. Allow to air dry.
For corrosion beyond the surface stage, refer
to Volume II (Navy and Army) or TO 1-1-691
c. If corrosion is present but replacement is not
(Air Force).
practical, surface corrosion on hardware may be
removed with an Abrasive Mat, A-A-58054 Type I
b. Remove any surface corrosion present with
(Volume IV or V, Chapter 2). Repeat paragraphs a.
Abrasive Mat, A-A-58054 (Volume IV or V, Chapter 2)
and b. after corrosion removal.
or Abrasive Cloth, 320 Grit, ANSI-B74.18 (Volume IV
or V, Chapter 2).
Compound, Corrosion Preventive
3
Water Displacing
Alcohol, Isopropyl
6
MIL-C-81309
TT-I-735
d. Spray a coating of Water Displacing, Corrosion
c. Wipe clean the corrosion products from the
P r e v e n t i v e Compound, MIL-C-81309 Type I I
antenna and aircraft mounting areas with a Cleaning
(Volume IV or V, Chapter 2), over cleaned hardware
Cloth, CCC-C-46 Class 7 (Volume IV or V, Chapter 2),
after installation.
dampened with Isopropyl Alcohol, TT-I-735 (Volume IV
or V, Chapter 2).
6-3.1.9. Antenna Connectors. Antenna connectors
require special procedures to avoid moisture entry and
d. Allow to air dry.
corrosion damage. Corrosion is, by far, the principal
cause of antenna performance deterioration. Clean
e. Normally the antenna is assembled with the dust
and preserve antenna connectors, both multi-pin and
cover mated to the bottom of the antenna casting. The
coaxial, in accordance with paragraphs 6-3.11. through
antenna cavity is installed inside the casting. A plate,
6-3.11.4.
called an antenna element, mates to the antenna
cavity flange under a plastic plate. During assembly of
6-3.1.10. U H F / V H F / A D F Antenna Sealing. The
the antenna components, discard the extruded rubber
location of UHF/VHF/ADF antennas is normally on the
dust cover channel which fits between the dust cover
lower fuselage. This results in a particularly severe
edge and the antenna casting. Clean the circumference
corrosion problem due to fluids in the bilge area. This
of the mated dust cover and antenna casting by wiping
has been the principal cause of maintenance
with a Cleaning Cloth, CCC-C-46 Class 7 (Volume IV
requirements on these antennas. The following
or V, Chapter 2) dampened with Isopropyl Alcohol
TT-I-735 (Volume IV or V, Chapter 2). Similarly, clean
around the circumference of the plastic plate which
mates to the antenna cavity, and the top of the fasteners
on the dust cover.
6-15