CVR data is lost!
I just read the NTSB official info. It did not mention the CVR. The FDR read out was provided by Canadian TSB, ergo I dare conclude the CVR was not secured.
They would have mentioned it.
So due to severe incompetence of the crew they decided not to secure the CVR in direct contradiction to Canadian law.
NTSB will find out exactly what happened here, but not nesesserely how and why.
The CVR is worth gold in this case , and the crew knew it.
On the matter at hand!
How to prevent this ever happen again:
Tune and follow the ILS inside 4 miles. And get new glasses!