"Matthew S. Whiting" wrote in message ...

Yes, that is a good question to ask. However, if you have an alternator
failure warning light, you still have 30+ minutes of energy in the
battery, depending on battery size and how much load you can shed given
the conditions.

Except if you get smoke in the cockpit and you only have one elecrical
bus, you cannot isolate the problem by turning off each bus
individually -- you have to turn off the whole electrical system with
all of your nav/com/instrumentation equipment.. not good.

--
Richard Kaplan, CFII

www.flyimc.com