01 March 2005
NAVAIR 01-1A-509-3
TM 1-1500-344-23-3
TO 1-1-689-3
miscuts of the gasket. Primer may be applied with a
Sempen, brush, small roller, or other approved
application process. Refer to weapon system specific
TO or TO 1-1-8 for primer selection and application
processes.
NOTE
(Navy) AVDEC gasket installation requires
authorization from the cognizant type/model/
series engineering authority for the aircraft.
6-3.1.3. Antenna Mounting (Air Force Preferred
Method). These procedures are applicable to all rigid,
flush, and dome antennas except in accordance with
aircraft specific technical manuals. Even though the
mounting bases of antennas vary in shape and size,
Primer and Topcoat
the following installation procedures are typical and
shall be used on all antennas allowing the use of a
break-free surface is obtained. Allow to air dry. If water
gasket.
break-free surface is not obtained, reclean area with
dilution of four (4) parts water to one (1) part cleaner.
a. Prepare aircraft corresponding mating surface
Rinse thoroughly to obtain a water break-free surface
(skin) and antenna mounting surface (area) in
and allow to air dry.
through g.
e. Where corrosion products were abrasively
removed, apply Chemical Conversion Coating,
b. Remove conductive gasket from the protective
MIL-DTL-81706 Class 3 to the affected surfaces. The
packaging. Exercise caution not to fold or bend the
Alodine Touch 'N Prep Pen (Volume IV or V, Chapter 2)
material. Verify that fastener holes and connector
is the preferred treatment method. If the Touch 'N Prep
cutouts in the gasket will align with the antenna mount
Pen is used, only one coat should be applied and the
when positioned for installation. Remove release film
treated surface does not require rinsing or wiping off
only from the side of the gasket marked "antenna side"
and can be air or forced air dried. Allow coated surfaces
and position over the antenna base. Beginning at one
to dry before proceeding. See Volume II and Chapter 5
side or the corner of the antenna, place gasket into
for chemical conversion material procedures.
position, carefully aligning gasket fastener holes with
antenna base fastener holes. Release film should
f. (N)(A) Apply appropriate primer and topcoat to
remain on exposed "aircraft side" of gasket until
the exposed bare metal surrounding the antenna and
immediately prior to antenna installation to the aircraft
extending 3/16" under the outer edge of the antenna
surface. Figure 6-3 shows removal of the release films
footprint. This coating will provide added corrosion
prior to installation on the aircraft.
protection to the perimeter of the antenna base if the
gasket or perimeter seal deteriorates over time.
CAUTION
Figure 6-2 shows paint line after application of primer
and topcoat.
Do not open the sealant material package until
it is ready for use. Follow the manufacturer's
g. (AF) Inspect the area to ensure there is no bare
instructions on the application syringe for
metal extending beyond the outer edge of the antenna
priming and mixing. Discard the syringe if it
mounting surface and extending 3/16" inward from the
has been removed from the package for more
outer edge of the antenna footprint. If bare metal exists
than 24 hours, as sealant performance may be
in this area, apply appropriate primer before attaching
compromised.
the antenna. This primer will provide added corrosion
protection to the aircraft structure at the perimeter of
c. If antennas are located in areas where oil, grease,
the antenna should there be any misalignments or
or fuel could pool near antenna connectors (normally