No, I'm _implying_ that I don't believe it took 30 minutes to get down. Based on the abstract I would say you're going to find out it came back down in under 30 minutes, and then "oops" they let the CVR be re-used, overwriting the recording anyway.
The text from the linked abstract says: "Cockpit voice recorder (CVR) information was not available for this incident because the data were overwritten before senior Air Canada officials became aware of the severity of this incident"
One of the nice things about working in the Web PKI is that this crap doesn't get you anywhere since keeping records is one of the requirements, and any time the options are "This issuer might be crooked or they might be incompetent" both are disqualifiying anyway, no need to figure out which it is to make a determination.
It lets me sleep easier, were people at Symantec reckless, or were they so greedy that they actively tolerated fraud? Don't care, not my problem now, let their shareholders worry about it.
Oh, I don't know about these particular ideas you're chasing. There are quite a number of independent, redundant resources that would be very difficult to align forgeries across and present as fraudulent data, worldwide, for weeks, months, and even years after the incident.
It just sounds like a fishing expedition for some kind of cover up that exploits an incredibly narrow gap, covered by a myriad of alternative information sources that are more than capable of sealing up an air tight sequence of events by other means.
Open, consumer information sources like flightaware.com alone had the answer to the questions you're asking, long ago.
The radar history for this event was paywalled here for days after the event:
The open, freebie log only gives like two weeks of charts, but the data you mention was lying around, available for like 8 months, to anyone with premium access to that particular service. And anyway, I'm sure it's just a convenience wrapper to public data that's still floating around to anyone willing to dig.
Here's another service, if you've got $500 bucks, and really would like to know right now:
And to reiterate, this is only costing money today on account of being late to the party.
Multiple systems surfaced this data to the world in real time, and openly back-logged for months after. I'd bet good money a wide audience fact checked exactly what you've suggested a long time ago (even here: https://news.ycombinator.com/item?id=14741605). But my opinion isn't very important when the information is available in a general sense, to anyone who really wants it, even now, more than a year later. Feel free to be suspicious about these resources being far downstream and non-official consumer products, but if that doesn't suffice, then other (much, much bigger) doubts occlude any potentially satisfactory assessment which won't get solved in a random thread by amateur internet detectives like us.
The text from the linked abstract says: "Cockpit voice recorder (CVR) information was not available for this incident because the data were overwritten before senior Air Canada officials became aware of the severity of this incident"
One of the nice things about working in the Web PKI is that this crap doesn't get you anywhere since keeping records is one of the requirements, and any time the options are "This issuer might be crooked or they might be incompetent" both are disqualifiying anyway, no need to figure out which it is to make a determination.
It lets me sleep easier, were people at Symantec reckless, or were they so greedy that they actively tolerated fraud? Don't care, not my problem now, let their shareholders worry about it.