Intéressant : les recherches et les indications du 7ème ping (il a été initié par l'avion ce qui est signe d'un évènement)
http://www.atsb.gov.au/media/5243942/AE ... Report.pdf
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The 1825 and 0019 SATCOM handshakes were log-on requests initiated by the aircraft. A log-on
request in the middle of a flight is not common and can occur for only a few reasons. These
include a power interruption to the aircraft satellite data unit (SDU), a software failure, loss of
critical systems providing input to the SDU or a loss of the link due to aircraft attitude.
An analysis was performed which determined that the characteristics and timing of the logon requests were
best matched as resulting from power interruption to the SDU.
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There are several reasons why the aircraft satellite data unit (SDU) might generate a SATCOM
log on request but an interruption to the aircraft electrical power supply was considered to be the
most likely reason
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(edit) : 2ème paragraphe