Of course I will 3D - the ARRC are incorrect, the aircraft had been on a vib 6 test flight earlier in the day and had passed. Then the crew took it for a role trip on which it crashed shortly after take-off. I will not speculate about what happened since a. I have a pretty good idea from information received anyway and b. there is a BOI convened which will report in due course.
However, despite your assertion that it was a mechanical failure, the fleet is not grounded, nor has it had any STI raised to check TR shafts and bearings. As a precaution, the RAF SARF went to ops only for less than 48 hours to wait for the BOI's 48 hr signal. The RN didn't even do that. The only advice for the meantime is not to do damper checks. Draw your own conclusions.