wombat Posted March 19 Report Share Posted March 19 (edited) @philiplane I think you are reading more into these regulations than exists. Those are not requirements. Appendix F to Part 43 is very clear about this. The tests may be conducted using a bench check. So, in order: #1: You could break the antenna off during this morning's wash job after testing the transponder (plus aircraft systems including antenna). Same difference. #2: There is no requirement for confirming ADS-B Output as part of 91.413 #3: I don't know about bench testing a GTX335/345. Maybe those can't be bench tested in a way that conforms to 91.413 or maybe the bench test requires taking the configuration module. I'm not a repair station. But my GTX327 sure can. So could my KT76, before it bit the dust. And when I installed my ADS-B out system (uAvionix wingtip) we didn't do any calibration and nobody ever has since, even when I switched from the KT76 to the GTX327. And there is no part of 91.413 or Appendix F. to part 43 that requires ADSB lat/long. Re: 91.217. Unless as installed they were tested and calibrated to be within 125' (95% probability), then yes, both the ADS-B out and transponder must be using the same source. If you have a GTX345, or a uAvionix wing or tail beacon, or pretty much everything, that'll be the case. Why would you have two altitude encoders? Re: Your shops.... That's unfortunate. But if you are bench testing a transponder, you wouldn't know which airframe was going to receive it, so of course you couldn't make a maintenance record for an airframe at that point anyway. Re: 91.413.b: I think it highly unlikely that the FAA would consider sliding the transponder out and then in to its tray to be an installation or maintenance action where data correspondence error could be introduced. If they'd consider doing that action as an installation at all.... I choose to remain silent. Edited March 19 by wombat 1 Quote Link to comment Share on other sites More sharing options...
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