Malaysia Airlines Flight 370

==== Communications from 02:25 to 08:19 MYT ====
Although the ACARS data link on Flight 370 stopped functioning between 01:07 and 02:03 MYT (most likely around the same time the plane lost contact by secondary radar),<ref name="Ground log" />{{Rp|36}} the SDU remained operative.<ref name=ATSB /> After last contact by primary radar west of Malaysia, the following events were recorded in the log of Inmarsat's ground station at [[Perth]], Western Australia (all times are [[Time in Malaysia|MYT]]/UTC+8):<ref name=ATSB />{{rp|18}}<ref name="Ground log"/>{{efn|Information released and reported publicly about SATCOM transmissions from Flight 370 have been inconsistent, especially the use of the terms "ping" and "handshake". It was initially reported as six "handshakes" or "pings" with one "partial handshake or ping" sent at 00:19&nbsp;UTC by Flight 370, unprovoked by the ground station. The events listed may consist of several "transmissions" between the aircraft and ground station over the course of a few seconds. A readable copy of the ground station log of transmissions to and from Flight 370 is available [https://web.archive.org/web/20160304185716/http://www.dca.gov.my/mainpage/MH370%20Data%20Communication%20Logs.pdf online]}}
* 02:25:27&nbsp;– First handshake ("log-on request" initiated by aircraft)
* 02:39:52&nbsp;– Ground to aircraft telephone call, acknowledged by SDU, unanswered
* 03:41:00&nbsp;– Second handshake (initiated by ground station)
* 04:41:02&nbsp;– Third handshake (initiated by ground station)
* 05:41:24&nbsp;– Fourth handshake (initiated by ground station)
* 06:41:19&nbsp;– Fifth handshake (initiated by ground station)
* 07:13:58&nbsp;– Ground to aircraft telephone call, acknowledged by SDU, unanswered
* 08:10:58&nbsp;– Sixth handshake (initiated by ground station)
* 08:19:29&nbsp;– Seventh handshake (initiated by aircraft); widely reported as a "partial handshake'", consisting of the following two transmissions:
:* 08:19:29.416&nbsp;– "log-on request" message transmitted by aircraft (seventh "partial" handshake)
:* 08:19:37.443&nbsp;– "log-on acknowledge" message transmitted by aircraft (last transmission received from Flight 370)
The aircraft did not respond to a ping at 09:15.<ref name="Ground log" />