The ACARS may or may not be accurate.
The ACARS doesn't appear to be reproduced in the correct format, e.g. the following is an example of the final ACARS from AF447.
http://oi54.tinypic.com/2qx4yzs.jpg
Note that the AF447 sent sequence gave F/CTL warnings priority over other events - where possible. In respect of the purported MS804 sequence, some of the type identifiers appear truncated.