| Canadian_JOY |
09-09-2016 07:47 AM |
"Just to add to that. The 24-bit code is entered by the installer (or airplane builder in this case) and not Van's. See 10.4 here (https://www.tc.gc.ca/eng/civilaviati...-497.htm#s10-0)"
Another point of clarification. The original post here was about 406MHz ELT programming. This programming, including the 24 bit ICAO code, is done by an Approved Maintenance Organization or a maintenance organization holding similar foreign (e.g. FAA) approval. Fleet operators will use a programming dongle to accomplish this task so as to ensure the ICAO code programmed into the ELT matches the airplane in which the ELT is installed. (On a side note, there has been one well documented 406MHz ELT failure resulting from an aircraft being dispatched with the programming dongle still in place, inhibiting the ELT's transmission. A terrible mistake on the part of the aircraft maintainers.)
When it comes to Mode S transponders, the guidance provided in the referenced Advisory Circular is absolutely spot-on. Some transponders require the ICAO code to be entered through front-panel controls, while some require the address to be hard-wired via discrete wires in the connector. Either way, the ICAO code goes with the airplane, so if you happen to have just installed a Mode S transponder, or if you've just received one back from the repair shop, double-check to ensure you've got the right 24-bit ICAO code programmed.
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