If I was one of those Boeing Board members who are probably sat around the conference table this weekend, I know what I would be concentrating on.
If the rumours about a substantial portion of the Thomson electrical system going AWOL in flight have any truth, I guess they would be looking again at which sub-contractor is liable for the electrical design.
For all those worrying about the duration of the repair, one can imagine that the Ethiopian frame could be easily repaired before the potential second grounding is lifted. If I was in the UK CAA, I would have had a sleepless night.