What exactly does the crossfeed bus do? For the C172SP, it says it powers the alternator field and the warning systems, which I understand. But why must those things be on the crossfeed bus and when would the crossfeed bus become inoperative?
What exactly does the crossfeed bus do? For the C172SP, it says it powers the alternator field and the warning systems, which I understand. But why must those things be on the crossfeed bus and when would the crossfeed bus become inoperative?