I'd like to add a little info from the press conferance:
- They had not been able to retrieve HUMS data from the accident flight, and they didn't think they would be able to.
- They wouldn't answer anything technical but made it clear that they shared what they found with "those with responsibility" like operator, manufacturerer and authorities. I interpret it as quite evident that they know much more that they were willing to share - so one could speculate what the reason for that could be.