User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
Page 7−3
15 Dec 2005
4. Procedure for the Directional Antenna
A. Removal and Installation Procedure
(1) Remove the directional antenna.
(a) If applicable, use a phenolic scraper to remove aerodynamic sealant around
periphery of antenna.
(b) Remove four or eight (quantity depends on dash number of antenna) non−Torx
drive screws used to attach antenna to fuselage. See Figure 2−6 for location
and number of mounting holes for each dash number antenna.
(c) Carefully lift antenna from fuselage avoiding any damage to the coaxial cables.
(d) Disconnect coaxial cables from antenna connectors J1, J2, J3, and J4.
(e) Put protective covers on the aircraft coaxial cable connectors and the antenna
coax connectors.
(2) Reinstall the directional antenna.
(a) If applicable, remove any existing aerodynamic sealant from antenna and clean
antenna mounting area.
(b) Put supplied o−ring in antenna o−ring groove. If antenna is supplied with a
Teflon gasket, install gasket between antenna and fuselage.
(c) Remove protective covers from antenna and aircraft coaxial mating connectors.
(d) Examine antenna and coaxial mating connectors to make sure they are clean
and secure.
(e) Orient antenna with respect to airframe (arrow painted on radome must point
forward). Connect four aircraft coaxial cables to antenna. Refer to Figure 2−6
for wiring information. Note the color bands on the antenna connectors and
cables: yellow = J1, black = J2, blue = J3, and red = J4.
NOTE: Do not apply a sealant between antenna base and fuselage.
Application of a sealant will reduce lightning protection.
(f) Align antenna mounting holes with holes in fuselage (note the non−symmetric
hole pattern).
(g) Attach antenna to fuselage with four or eight (quantity depends on dash number
of antenna) non−Torx drive screws and flat washers. See tables 3 and 4 of
Figure 2−6 for dash number mounting information. Apply a sealant to the screw
threads before installing them. Torque mounting screws to 22 ± 3 inch−pounds
(2.5 ± 0.2 Newton−Meters).
(h) Apply an aerodynamic sealant around periphery of the antenna base to prevent
seepage of water and condensation and to preclude corrosion.