Antenna Installation; Antenna Installation Recommendations; Faa Recommendations; Rtca Do-204 Requirements For Elt Location - Kannad 406 AF-COMPACT Installation Manual

5. Antenna Installation

Use only whip or rod approved antennas.
A. Antenna Installation Recommendations

(1)FAA Recommendations

Installation must be made by qualified personnel in accordance with FAA
regulations. Duplicating a previous installation may not be acceptable.
Methods for installing antenna are outlined in AC43.13-12, refer to:
FAA - Advisory Circular 43.13-2A (Acceptable Methods, Techniques,
and Practices - Aircraft Alterations), specifically, Chapters 1, 3, 11
and 13.

(2) RTCA DO-204 Requirements for ELT location

"ELT antennas should be located away from other antennas to avoid
disruption of antenna radiation patterns."
"Idealistically, for the 121.5 MHz ELT antenna, 2.5 meter separation is
sufficient separation from VHF communications and navigation receiving
antennas to minimize unwanted interferences."
"ELT antennas should be vertically polarized when the aircraft is in the
normal flight attitude."
"ELT antenna mounting surface should be able to whistand a static load
equal to 100 times the antenna weight applied at the antenna mounting
base in all directions."
"The antenna should be mounted as close to the respective ELT as
applicable. The proximity of the ELT antenna to any vertically-polarized
communications antenna shall be such as to minimize radio frequency
interference and radiation pattern distorsion of either antenna. Coaxial
cable connecting the ELT antenna installation should not cross the aircraft
production breaks and should have vibrations proof RF connectors on
each end. The coaxial connecting the ELT transmitter to the external
Antenna should be secured to the aircraft structure and when the coaxial
cable is installed and the connectors are mated, each end should be have
some slack."
B. Antenna installation procedure
The antenna must be mounted on the top of the aircraft to assure maximum
visibility of satellites. The upper aft portion of the fuselage should be preferred.
It should be mounted away from projections such as a propeller, tail surfaces,
or the shadow of large antennas. It is the responsibility of the installation
agency to determine the appropriate and adequate antenna installation.
INITIAL INSTALLATION MANUAL
KANNAD 406 AF-COMPACT / KANNAD 406 AF COMPACT ER
PAGE: 12
SEP 16/2009