Lost in Saigon,
if the expert talking here:
Innovation Analysis Group is not talking about the CAB PRESS advisory, then I would refer to him as a real expert.
(Had no time to actually watch the video.)
It appears he was not given all the information that is available. If not, where does all the talk of "Cabin Vertical Rate" originate?
Simple: Because this is the interpretation the audience wants to hear. You know, yellow press is telling what touches people, so does PPRuNe. Steep dive? How scary, yet sensational.
In reality, the last message is simply stating that something is wrong with the measurment of cabin pressure. It does not specify what exactly. It will be sent just as well when one of the sensors is wrong. One of the sensors this message is relying at is one of the ADIRUs - which were erroneous, as we know. => Faulty ADIRUs are enough to trigger this advisory.
More in-depth here:
http://www.pprune.org/tech-log/37634...ml#post4982977