Technically, it's not the
report, it's an "update". The preamble says:
The following update contains facts that the TSB has been able to validate at this time. It contains no conclusions about the factors that contributed to the occurrence. The final investigation report will include an analysis of all relevant factors and provide the Board's findings.
There are of course, some aspects of the "facts" that one could easily speculate/extrapolate into something causal...