Quoting Sunfish:
"As for EMI, I'm not an electronics person, but I would have thought that EMI capable of affecting one part of the aircraft system would also have affected a hell of a lot of other systems, and the damage would have been obvious."
I would have thought so as well . . . .
But as i have addressed before, i have been confronted with a situation where an aircraft type encountered unscheduled closing of the fuel shutoff valves without damage to any of the other electrical or avionics systems on the aircraft. I admit, it was in the early years of FBW technology, yet it happened and was later corrected, hence the introduction of an EMI filter to the valve assembly.
Regards,
Green-dot