Flight MH370/2014-03-08/07-13-58 MYT

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Event Metadata

Flight ID	MH370
Event Type	gnd
Date and Time MYT	8 March 2014 07:13:58 MYT
Date and Time UTC	7 March 2014 23:13:58 UTC
Flight Phase	Phase 6
Data Source	Safety Investigation Report (2018) 1.9.4 / Table 1.9C (No. 19)
Date and Time ISO 8601	2014-03-07T23:13:58Z
ISO 8601 Description	Flight MH370 Event at 2014-03-07T23:13:58Z

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Event Summary

 07:13:58 MYT Saturday 8 March 2014

Chronology

Ground-to-air telephony call placed from a number with country code 60 (Malaysia)

1. Q10 AOC Priority Level.
2. The Perth GES logs indicate that a good link is likely to have existed at this time.
3. This call would have been routed to the cockpit and should have resulted in a chime and an incoming visual annunciation on the Audio Control Panels, and, if the appropriate SATCOM page was selected, then also on one or more MCDU.
4. The GES logs show zero duration, indicating that the call went unanswered. Note that there are two methods for the answering of an incoming call: Either by pressing the relevant Line Select Key on an MCDU, or by keying a microphone.

Event Details

1. Safety Investigation Report MH370/01/2018 Satellite Ground Station Logs - Key Observations

   Ground-to-air telephony call placed from a number with country code 60 (Malaysia)
   

   1. Q10 AOC Priority Level.
   2. The Perth GES logs indicate that a good link is likely to have existed at this time.
   3. This call would have been routed to the cockpit and should have resulted in a chime and an incoming visual annunciation on the Audio Control Panels, and, if the appropriate SATCOM page was selected, then also on one or more MCDU.
   4. The GES logs show zero duration, indicating that the call went unanswered. Note that there are two methods for the answering of an incoming call: Either by pressing the relevant Line Select Key on an MCDU, or by keying a microphone.

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Notes

1. Source: Safety Investigation Report MH370/01/2018 2.5.1 Summary of Key Observations of the SATCOM Ground Station Logs

   9) Two Ground-to-Air Telephony Calls were placed to the cockpit from the MAS Airline Operations Centre at Airline Operational Communications (AOC) Q10 priority level at 1839 and at 2313 on 07 March 2014. Neither of the calls was answered.

2. Source: Safety Investigation Report MH370/01/2018 2.5.1 Summary of Key Observations of the SATCOM Ground Station Logs

   10) The SATCOM responded normally to a series of roughly hourly Log-On Interrogations from the Perth GES, up to and including a Log-On Interrogation at 0011 on 08 March 2014. The two unanswered ground to air calls at 1839 and 2313 reset the Perth GES inactivity timer and hence the Log-On Interrogations were not always hourly.

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The short summary below is transcluded into a relevant Chronology page.

8 March 2014   07:13:58 MYT

Second ground-to-air telephony call placed from Malaysian (country code 60) number to MH370 at Q10 AOC priority level. Call goes unanswered.

Flight Identifier, for example MH370

Malaysian Time (MYT) is Coordinated Universal Time (UTC) + 8 hours

Coordinated Universal Time

The Safety Investigation Report MH370/01/2018 was released by the Malaysian ICAO Annex 13 Safety Investigation Team for MH370 in July 2018. More Info

The telephone code for Malaysia

Ground earth station. A satellite ground station sends or receives data from orbiting satellites. (Source: ATSB)

Satellite Communications

Multi-purpose Control Display Unit(s)

Malaysia Airline Systems