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  #11  
Old 09-09-2016, 07:47 AM
Canadian_JOY Canadian_JOY is offline
 
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"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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  #12  
Old 09-09-2016, 08:06 AM
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sbal0906 sbal0906 is offline
 
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D'oh! Thanks for clarifying. I had it in my head we were talking about transponders. ... haven't had coffee yet....

Cheers,
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  #13  
Old 09-09-2016, 08:26 AM
Canadian_JOY Canadian_JOY is offline
 
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Quote:
Originally Posted by sbal0906 View Post
D'oh! Thanks for clarifying. I had it in my head we were talking about transponders. ... haven't had coffee yet....

Cheers,
Hey no worries, Shamit. We've grown from building NORDO airplanes to building airplanes with capabilities that rival modern airliners. I think most of us have experienced confusion at least a few times in our build as we try to figure out which wire goes where, and why! Coffee sometimes helps. Sometimes walking away and not thinking about it for a day helps. Whatever works. Build on!
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