Time:1554:41 UTC

Time:1554:41 UTC

0. Event Time and Type

Event Time:  23:54:41 MYT   Edit.

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Event Type: satcom acars   Edit.

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1. Summary ..................................................................................................Edit

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ACARS Established SATCOM.

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2. Details .......................................................................................................Edit

1. Safety Investigation Report MH370/01/2018 Appendix 1.9A

   
   

   Time 15:54:41	Trans 46817961	Direction Incoming Downlink	AN 9M-MRO	FI MH0000	Medium POR1	Machine MHKULKJACM001	Raw DTG 071554	SMI MED	Application RELAY
   Status Normal		Message Type Established SATCOM			Source/Destination QXSXMXS

   QU DPCCAMH
   .QXSXMXS 071554
   MED
   FI MH0000/AN 9M-MRO
   DT QXT POR1 071554 S04A
   - 0ES155446VS

   
   

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3. Notes .........................................................................................................Edit

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References for events at or about the time of 2354:41 MYT, 7 March 2014 (1554:41 UTC, 07 March 2014).

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Pre-Flight

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<section begin=Narrative />

23:54:41 MYT, 7 March 2014

ACARS: Established SATCOM

The Aircraft Communication and Reporting System (ACARS) established a datalink between the aircraft 9M-MRO and the service provider (SITA) over the satellite communications system. However, the SDU was still using the Inmarsat POR-1 satellite, and no flight ID had been entered. Information about this event is summarised in the table below.

Source	Aircraft Communication and Reporting System (ACARS) on aircraft 9M-MRO
Destination	SITA (QXSXMXS)
Message	Established SATCOM
Satellite	POR1
Flight ID	Not provided

          <section end=Narrative />

References

Item 1

RefID:Factual Information March 2015/1.9.4.1

1.9.4.1 ACARS Traffic Log

ACARS traffic log messages sent/received to/from 9M-MRO between 1554:41 UTC, 07 March 2014 (2354:41 MYT, 08 March 2014) until 1815:25 UTC, 07 March 2014 (0215:25 MYT, 08 March 2014) is shown in Appendix 1.9A. Some key events are extracted and explained below.

At 1554:41 UTC, 07 March 2014, ACARS data link was fully established on SATCOM transmission...

Item 2

Transcript

{{#lst:Content:FI_Appendix_1.9A/1554:41 UTC|Reference}} {{#lst:Content:FI_Appendix_1.9A/1554:41 UTC|FullText}}

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Notes

1. The Report has an incorrect date - 2354:41 MYT, 08 March 2014 should be 7 March 2014.
2. It seems early to say that the ACARS datalink was 'fully established' when the SATCOM was not yet using the satellite over the Indian Ocean Region. (The datalink was established using the IOR-3 satellite at 1559:57 UTC (2359:57 MYT)).
3. If ACARS was operating prior to this event it would most likely have been using a datalink over VHF radio.

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Coordinated Universal Time

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

Aircraft Communication and Reporting System

ACARS data link established over a SATCOM link

Aircraft Number

Aircraft Registration Number for the Boeing 777 used for Flight MH370. More Info

Flight ID

Inmarsat geostationary satellite above the Pacific Ocean

Unique hardware (machine) ID

Date and Time (UTC) in DD/HH/MM format

Date and Time (UTC) in DD/HH/MM format

Standard Message Identifier

An identifier for SITA, a service provider for ACARS messages.

An identifier for SITA, a service provider for ACARS messages.

Invalid Flight ID: MH for Malaysia Airlines but no flight number

Aircraft Number (Registration) 9M-MRO

ACARS data link established via SATCOM at 15:54:46 (UTC)

Société Internationale de Télécommunications Aéronautiques

Satellite Data Unit

Pacific Ocean Region

Identification

Flight Identifier, for example MH370

Satellite Communications

Indian Oceanic Region

Very High Frequency