Standards for airborne electronics are actually even more stringent - FCC rules say in essence that your device may not produce interference and don't exactly c

Standards for airborne electronics are actually even more stringent - FCC rules say in essence that your device may not produce interference and don't exactly care about whether you device works when exposed to interference. This is not exactly what you want in safety critical system. On the other hand, it's not about designing interference resilient system, but about testing that such system really works as intended, which would probably involve impractical number of tested combinations of devices (ie. consumer phones and whatever else). It's mostly about manufacturer's liability than anything else - it's cheaper to say "not supported and not tested".