Green-dot,
I personally find your technical analysis viable, but I like to go further on your other comments:
The AAIB only mentions the EPR values but not the other engine parameters ...
Question remains what those other consistent engine parameters were indicating.
... However, no explanation is given as to how the AAIB reached this conclusion and if indeed the spar valves are monitored and recorded during all circumstances. The text is nicely formulated, so that the public perception is such that sufficient data has been obtained without the need to explain the details.
Thanks to Internet, we can see a huge interest from general public for this specific event as well as others, but still, access to datas is very controlled, limited, and restricted. Give full access to all these datas, and we've got a much better chance to solve this enigma.
But no, everything is confined to an official Authority, with the only participation of the Big corporations, the ones directly involved in this bizarre event ...
And what does Joe public ... ?
Listen ... comply ... and
Do we really want to trust and follow
a few in Power without questioning ... Will we ever learn ?