User's Manual

Table Of Contents
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
4. Painting
A. TCAS Directional Antennas
(1) Scope
This procedure covers the removal and re-application of coating to the TCAS
directional antenna. Localized touch-up is allowable and preferred using airbrush
techniques to ensure minimal paint thickness. The touch-up may be applied
either with the antenna on the aircraft or removed from the aircraft.
(2) Procedure
WARNING: SOLVENTS AND COATINGS ARE COMBUSTIBLE. KEEP
AWAY FROM HEAT AND OPEN FLAME.
(a) Clean
Scrape away all filleting and adhesive material from area to be coated.
Remove surface contamination using isopropanol alcohol or reducer.
(b) Scuff Sand
If the entire antenna is to be recoated, sand to primer with 220-grit
sandpaper. An orbital sander is preferred. For localized touch-up, feather
sand areas of exposed radome material to provide a smooth transition to
the painted surface.
(c) Final Sand
If the entire antenna is to be recoated, sand the primer and through-
holes using 400-grit sandpaper or Scotch-Brite so the primer is removed
except in swirls wherever possible.
(d) Final Clean
Clean the surface to be coated with isopropanol alcohol or reducer.
(e) Prime
NOTE:
The pot life of the primer after mixing components is 8 hours.
1 Cover each Torx screw head with an adhesive dot to prevent paint
from being applied to the screw heads.
2 Mix primer components in a 1:1 ratio under slow agitation.
3 Allow 15 minutes before spraying.
4 Spray one light coat wet film thickness of 1.5 mils.
Viscosity -18 to 20 seconds No.2 Zahn test
Gun orifice 363-A needle or equivalent
Fluid pressure 5 to 10 PSI recommended
Air pressure 50 PSI recommended
Pub. No. 8600200-001, Revision 004
34-45-29
9-3
04 Nov 2014
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