http://fortune.com/2019/03/13/ethiopian-air-crash-black-boxe... > but Ethiopian authorities would prefer to work with the U.K.’s Air Accidents Investigation Branch to ensure that U.S. experts won’t have undue influence in the probe of the American-made plane.
https://www.bloomberg.com/news/articles/2019-03-13/ethiopia-... > The choice of Europe over the U.S. National Transportation Safety Board for the analysis of the black boxes is a strategic decision for Ethiopian Airlines and the nation’s government, said Asrat Begashaw, the carrier’s public relations director.
With that said, AIAB has just as formidable a reputation as the FAA. If the truth is there, they'll find it.
[1] https://gulfnews.com/world/ethiopian-airlines-crash-germany-...
Also, the F.A.A. has already been aware that there were issues with this plane (software fixes were being worked on), but the planes continued to fly. If it turns out that the information already known to them BEFORE the latest crash should have been sufficient to call for a grounding, I could see them attempting to cover their ass.
We are talking about governments here so the conspiracy theory that the person who opened the box substituted a different set of data is actually possible. Conspiracy theory territory for sure, so you really want to make sure that a fully trusted third party is involved. France seems as good as anyone to fit that bill.
If you were worried about conspiracies then multiple aviation authorities, or government departments, could send observers to watch the opening and imaging.
Secretary of Transportation Elaine Chao was Secretary of Labor under George W. Bush, Distinguished Fellow at The Heritage Foundation, and the wife of Senate majority leader Mitch McConnell.
I think the black box was handled by British investigators:
https://www.telegraph.co.uk/news/worldnews/europe/ukraine/10...