Clarification on a couple of ACARS assumptions?
I hope this will be taken as intended - as an anti-speculation post.
1. Is it really safe to assume that all three pitot tubes were giving false readings? All three might disagree - but that would also be true, would it not, if only two were giving false readings and the third was still functioning normally in all respects? In the event it probably does not matter, since the computers are going to report a three-way disagreement and toss it to the pilots in either case...I just caution against stating flatly that all three pitots failed. We don't know that.
2. The cabin altitude warning seems equivocal. Plane decompresses - or - plane rises 2,000 ft. in 20 secs. in a convective updraft - or - plane drops 2,000 ft. in 10 secs. in a convective downdraft - or - plane ascends/descends rapidly for some other reason. Would not any rapid altitude change in either direction that exceeded the pressurization/venting system's ability to keep up lead to this warning?