At one time I had a do all one switch, and it had a momentary failure in flight. I bet my heart did not beat again until the plane came back to life. I landed and replaced the switch and immediately modified the plane to install a high grade switch for the Ignition only( Battery 009 ). If you were to have a short in the system that could start a fire, the only way to stop the fire would be to stop the engine. I don't think it is the best option. On most commercially built aircraft they even isolate the communications equipment so that system shorts can't harm the radio's.
Orma Southfield, MI KR-2 N110LR 1984 See Tweety at http://www.kr-2.aviation-mechanics.com See other KR spces at www.kr-2.aviation-mechanics.com/krinfo.htm
