Piper J3
Well Known Member
I would not say impossible - nothing is 100%, but the 912 is designed with redundant and self-powered ignitions that mimic the magnetos on conventional engines. You don't have to worry about health of the main battery in the air other than to power instruments, lights, and elevator trim servo. The EFIS and GPS have internal backup batteries to keep them operating in the event of a power failure. The engine ignition will keep functioning perfectly with a main power failure.
Edit - the Dynon D-180 EFIS in early 12's may not have a backup battery supplied as standard. It think it is optional. GPS always have an internal backup battery.
Edit - the Dynon D-180 EFIS in early 12's may not have a backup battery supplied as standard. It think it is optional. GPS always have an internal backup battery.
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