Reviewing the AF447 ACARS data received via Satcom shows a possible maximum delay of up to 115 secs between time-stamp and reception. In the event that there are widespread failures to report via ACARS one would would not expect many of them to have had a chance to propagate and transmit within a window of 2+ mins.
As has been mention previously, ACARS is designed as a maintenance aid and transmission is the systems lowest priority. It would be interesting if someone has an example of the last ACARS transmissions via VHF for an aircraft that had widespread electrical failure to see what ACARS managed to transmit.
Of course, the reason for the abrupt end to the ACARS messages could still be explained by loss of reception.
I am not sure whether it has been confirmed that Egypt Air had subscribed to the transmission of ACARS via Satcom? If they did there may be additional Satcom data that has not yet been released.
AF447 ACARS See #2431
http://www.pprune.org/tech-log/39510...esume-122.html