Occasionally during the taxi out, we overhear the characteristic rapid chirping of a mobile phone through our headsets. More often than not, it turns out to be a crew phone
, we switch it off, then continue with no ill effects.
Sometimes, however, it becomes necessary to hold clear of the runway and make a PA reminding PAX to switch their phones off. At the very least, something back in the cabin is emitting enough of a signal to be picked up by the cockpit intercom. I
think that once in a while I have observed deviations in some of the aircraft nav kit while the interference is going on, but it is possible I'm just being paranoid...
