Just out of interest, what power loss are we talking here? So if you lose the electrical system in the aircraft does the engine fail, or is it more like larger turbines that have an integrated alternator for engine only systems. The turbine not really requiring the alternator to sustain though if the alternator fails, although you do lose some automated control functions. With a spark and fuel injection related piston that would mean total power loss if your electrics were fried, would make lightning strikes possibly interesting. I've never had great trust in aircraft electrical systems, compared to power plants, like boats everything a plane is exposed to is anti wiring and electronics. And talking of IO-360s, the Arrow engine set-up used to blow/drip oil directly into the alternators reducing their life by about 70%.