5.2.2 Electrical Paths
When planning any wiring on an aircraft it should be done by a qualified person who is familiar
with the latest rules and regulations of the FAA and the manufacturer of the aircraft. The
standard acceptable data that is found in AC) 43.13 (Acceptable Methods, Techniques, and
Practices – Aircraft Alterations), specifically Chapters 11 and 12, will be of immense help in
planning your installation. Care should be taken to ensure the cabling crosses high power
cabling at 90
0
to avoid introduction of RMI or EMI into the ELT system.
5.2.3 Electrical Loading
Emerging Lifesaving Technologies 406ELT with GPS requires that an external power source be
used to power the GPS receiver during normal operations. Installation of new electrical or
electronic equipment will change the load on the aircraft’s power generating system. Although
the 406ELT only draws 50 mw of power it is necessary to install a ½ amp fuse or fusible link to
protect the wire harness and the integrity of the aircraft’s electrical system. Detailed information
can be found in:
AC) 43.13 (Acceptable Methods, Techniques, and Practices – Aircraft Alterations),
Specifically, Chapter 11 sec 3 Para. 11-36, and sec 4 Para. 11-47 thru 11-52
Changes to the electrical load require that an appropriately rated individual perform the analysis
and make the needed connections to the ship’s power distribution network. If possible, the ELT
circuit breaker should be connected to the Avionics Buss.
5.2.4 Antenna Placement
The placement of the ELT antenna has many important considerations such as:
• Location should be in keeping with Current Airframe Manufacturers Instructions
• Location should be in keeping with Current FAA rules and regulations
• Location should be designed to allow for the greatest possibility of survival
• Location should be kept away from structures that may mask the signal
• Location should be as close as possible to the ELT Transmitter
• Location should also be aesthetically pleasing to the owner/operator
Remember the old antenna location may not be the best location
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