A2C wrote:
... The engine will still run on the mags. The only possible problem that I can think of would be the regulator going out, and somehow causing the battery to blow up. I doubt that would even happen.
My Voltage Regulator went out at 11:30 pm one night in a Grumman Cheetah. Got
real dark inside. Engine ran fine, of course ...
Long story short, at the time I was a very active CFI who taught "Whoops ... your landing light is burned out!" night landings fairly regularly, along with the recommended procedures to follow in the event of loss of communications, so my pucker factor was very low, matter of fact. However, after landing and turning off the active (and seeing a funny white flashing light from the control tower ...

), I found the most challenging part of my "emergency" was keeping between the blue lights when I couldn't see a thing otherwise ...
Wade