I flew spektrum for years - Never had an issue - then one day we were having a "fun fly" and we lost 3 different A/C to radio Failure (the real kind ) One was one of mine - all three worked when the piece were picked up. Many flights that day but only spectrum was effected. Shortly after I moved to graupner. Many club members still fly spectrum (though the majority fly OpenTX stuff now) and no further issues - That was just a weird day that left many questions but no answers. I hate to "bash" any system as as Lonnie said many failures are caused by different issues and blamed on the system.. I have had one "failure" on graupner but it was directly traceable to a bad RX power switch. In retrospect I think all the Spectrum issues that day might have been power supply related (weak BEC setups) as older DSM/DSMX receivers were susceptible if the voltage got low) but it was just funny that they all manifested in one session.

Dan.. Was this a Gasser? the elevator (sometimes throttle) seems to be the first to be hit if you get any interference from the ignition at least in what I have seen - Usually caused by spark plug cap issues.