I agree.
If you look at the avionics internals thread you will see that a lot of it, particularly the single instruments like engine monitors, fuel totalisers and such which like dinosaurs have remained basically unchanged for 40 years, is not built to a decent standard.
The whole business is protected from scrutiny by the TSO and other certification systems. Once you get certified you can make any old crap. Even software QA – a discipline full of academic pontificators but which is highly troublesome on anything not completely trivial – is practically nonexistent on this class of monitoring product.
Hopefully it will be something else… But at best it looks like a stupid design vulnerability.
Peter wrote:
What happens if you power up the instrument on the bench, with some sensors connected?
Haven’t tried that yet – will ask my A&P if we can give it a go!
It is just 2 wires, plus 1 TC sensor maybe.
