Ignition Override,
I welcome any and all sound postulations as to the cause of this event, however you are only coming up with conspiracy theories.
If you have a sound connection between the two events come up with it, no one has so far, come and collect your prize.
I should add that I was also on the team that designed the 777 composite rudder, now that either makes me a puddle jumper or someone who something about the design of composite rudders.
Your experience of from a flight crew perspective is welcome, I just hope that you reciprocate my experience as a design engineer and as a pilot, irrespective of where I sleep at night.