01 March 2005
NAVAIR 01-1A-509-3
TM 1-1500-344-23-3
TO 1-1-689-3
antenna connectors, and all other exposed metallic
CAUTION
hardware, including anchor nuts, and nut plates.
There are some radar antennas that have a
protective finish or covering, such as mylar,
placed over the aluminum/magnesium base
metal. Refer to the applicable service directives
Sealing Compound
2
for further information and repair procedures
Corrosion Inhibitive
on these antennas.
MIL-PRF-81733
6-3.1.7. Temporary Radar Dish Antenna Protection.
c. Install dome or cover. With Spatula, A-A-277
This procedure is appropriate for repair of limited
damage to the finish of a dish antenna. It is also
of Sealing Compound, MIL-PRF-81733 (Volume IV or
appropriate for touch-up type use. Organizational/Unit
V, Chapter 2), over the junction of fiberglass cover and
or Intermediate level activities shall perform the
aircraft skin. Ensure sealant also covers fastener heads
following procedure:
to form a watertight seal.
a. Remove surface corrosion with Abrasive Mat,
NOTE
For antennas with EMI gaskets, place sealant
around the outer edge (periphery) of the gasket
to prevent the entry of moisture. Ensure no
sealant gets between the conductive EMI
Alcohol, Isopropyl
6
gasket and the contacting skin, since the
TT-I-735
sealant is an insulator.
b. After completion of corrosion removal, clean the
d. Allow the sealant to cure for one-half hour, then
area with Isopropyl Alcohol, TT-I-735 (Volume IV or V,
remove excess sealant from the aircraft skin area
around the antenna using a nonmetallic scraper shown
dampened Cleaning Cloth, CCC-C-46 Class 7
6-3.1.6. Radar Dish Antenna Corrosion Preventive
c. Allow to air dry.
Procedure. One of the primary problems related to
dish antennas is that the protective finish on the dish
is subject to scratching and chipping. This usually
occurs in the process of normal handling and
Compound, Corrosive Preventive 26
maintenance. The antenna metal is usually aluminum
MIL-DTL-85054
or magnesium. Since both metals are anodic to the
attaching hardware, the dish is potentially subject to
d. Spray a coating of Water Displacing, Corrosion
galvanic corrosion around the hardware. In addition,
P r e v e n t i v e Compound, MIL-DTL-85054, Clear
the antenna is subject to surface corrosion wherever
the finish is damaged. Depending upon facilities,
affected areas. Unless the repaired area is subject to
deployment, and other factors, either refinishing or a
significant abrasion or erosion, this coating will provide
temporary protection procedure is appropriate. Refer
relatively long term corrosion protection (at least one
to Volume II (Navy or Army) or TO 1-1-691/TO 1-1-8
year).
(Air Force) for procedures for stripping, cleaning, and
refinishing. Refinishing is normally justified only in the
6-3.1.8. Radar Antenna Associated Hardware. For
case of general finish damage (at least 20% of the
protection of the radar antenna associated hardware,
antenna area).
such as nuts, bolts, screws and washers, utilize the
following procedure:
6-14