Originally Posted by
Grumble
I guess there was an instance of a complete loss of power of one in Europe when power cycled to the FADEC for something like several thousandths of a second, but it was enough for both motors to fail and kill the occupants. Don't remember which motors they were.
...of how airplanes get a poor reputation. In this case based on half-remembered anecdotes.
Those pilots took off after starting the engines on external power (specifically forbidden by the POH.) When they retracted the gear, the transient on the bus caused both engines' ECUs to reboot, shutting both down
This resulted in an AD that added batteries that are diode-ORd to the ECUs. If the main bus sags, the ECU batteries keep the engines running for 30 minutes.
Those were Thielert engines, but that's not germain to the story...it was an electrical problem due to violating the airplane's operating procedures.