Time:0203:41 MYT: Difference between revisions

MH370 DECODED
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                 <p>References for events at or about the time of 0203:41 MYT, 8 March 2014 (1803:41 UTC, 7 March 2014).   </p>
                 <p>References for events at or about the time of {{PAGENAME}}, {{Day 001}}. </p>
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<h5>Narrative</h5>
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<h6>02:03:41 MYT</h6> <!-- Time HH:MM:SS MYT and date -->
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            <p>1803:41 - GES initiates a DATA-2 ACARS transmission (uplink), but receives no acknowledgement from the SATCOM.</p>
<!-- To write the narrative ask who?, what? where? how? why?. -->
<p>a. Therefore, the SATCOM Link was lost at sometime between 1707:48 and 1803:41.</p>
<h6>SATCOM: No acknowledgement from aircraft SDU</h6>
<p>b. There is no evidence of a cockpit-initiated manual Log-Off of the SATCOM.</p>
<p>At [[Time:0203:23 MYT|0203:23 MYT]] MAS ODC attempted to contact the aircraft by sending a text message to the cockpit printer, via ACARS. The service provider, SITA, would have forwarded the message to Inmarsat for transmission to the aircraft via a satellite communications datalink.</p>
<p>The Inmarsat GES initiated a DATA-2 ACARS transmission (uplink) at 1803:41 UTC (0203:41 MYT), but received no acknowledgement from the SDU on the aircraft 9M-MRO. Therefore, the SATCOM Link was lost at sometime between [[Time:0107:48 MYT|0107:48 MYT]] and 0203:41 MYT.</p>
<p>There is no evidence of a cockpit-initiated manual Log-Off of the SATCOM.</p>
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           <html><a href="\wiki\Time:0203:41 MYT" target="_blank" class="button radius">Sources</a></html>
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           <html><a href="\wiki\Time:0203:41 MYT" target="_blank" class="button radius">Details</a></html>
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<h4>References</h4>
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<dt><i>Factual Information (2015) [[FI_2015:1.9 Communications/1.9.5 Satcom/1.9.5.4|1.9.5.4]]</dt>
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<dt>{{Ref:Factual Information March 2015/1.9.5.4}}</dt>
<dd><p>1.9.5.4 SATCOM Ground Station Logs - Key Observations in Chronological Order</p>
<dd><p>1.9.5.4 SATCOM Ground Station Logs - Key Observations in Chronological Order</p>
<p>7. 1803:41 - GES initiates a DATA-2 ACARS transmission (uplink), but receives no acknowledgement from the SATCOM.</p>
<p>7. 1803:41 - GES initiates a DATA-2 ACARS transmission (uplink), but receives no acknowledgement from the SATCOM.</p>
<p>a. Therefore, the SATCOM Link was lost at sometime between 1707:48 and 1803:41.</p>
<p>a. Therefore, the SATCOM Link was lost at sometime between 1707:48 and 1803:41.</p>
<p>b. There is no evidence of a cockpit-initiated manual Log-Off of the SATCOM.</p></dd>
<p>b. There is no evidence of a cockpit-initiated manual Log-Off of the SATCOM.</p></dd>
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          <h5>Notes</h5>
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    <li>1707:48 UTC is [[Time:0107:48 MYT|0107:48 MYT]] </li>
    <li>Because the SDU on the aircraft did not respond, at 1803:41 UTC and again at 1805:11 UTC, the ACARS message could not be sent. Therefore ACARS returned the message to MAS ODC with the message type MAS-F (failed) at [[Time:0206:25 MYT|0206:25 MYT]]). </li>
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<h4>Notes</h4>
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           <p><b>Version History</b></p>
           <p><b>Version History</b></p>
 
          <p>24 Feb 2018: Page layout updated </p>
           <p>19 November 2016 - page created</p>
           <p>5 June 2018: Page layout updated - this section hidden </p>
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           <p>6 June 2018 - Narrative updated</p>
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Latest revision as of 05:36, 13 July 2023

Time:0203:41 MYT

0. Event Time and Type

Event Time:  02:03:41 MYT   Edit.

Note: The Event Time includes a link to the NS_Time page. See sample code below:-

<html><a href="/Time:NNNN UTC/MYT" target="_blank"> emsp;</a></html>NNNN MYT

Event Type: satcom acars   Edit.

Note: The colour scheme is defined by the Event Type.


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

This summary will be transcluded onto the relevant Timeline page.

GES initiates a DATA-2 ACARS transmission (uplink), but receives no acknowledgement from the SATCOM. Therefore, the SATCOM Link was lost at sometime between 1707:48 and 1803:41 (UTC).

Content below will be transcluded into the relevant Event Details Page.

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

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

    GES initiates a DATA-2 ACARS transmission (uplink), but receives no acknowledgement from the SATCOM.

    1. Therefore, the SATCOM Link was lost at sometime between 1707:48 and 1803:41.
    2. There is no evidence of a cockpit-initiated manual Log-Off of the SATCOM.
    3. Note that even if the on-board ACARs equipment was failed, disabled or powered down at this time, it would not prevent the SATCOM from acknowledging the ACARS-related P-Channel transmissions from the GES.


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




Explanatory Notes
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References for events at or about the time of 0203:41 MYT, Saturday, 8 March 2014.

To return to the Timeline click on the button:-

Air Turn Back

Narrative

<section begin=Narrative />

02:03:41 MYT
SATCOM: No acknowledgement from aircraft SDU

At 0203:23 MYT MAS ODC attempted to contact the aircraft by sending a text message to the cockpit printer, via ACARS. The service provider, SITA, would have forwarded the message to Inmarsat for transmission to the aircraft via a satellite communications datalink.

The Inmarsat GES initiated a DATA-2 ACARS transmission (uplink) at 1803:41 UTC (0203:41 MYT), but received no acknowledgement from the SDU on the aircraft 9M-MRO. Therefore, the SATCOM Link was lost at sometime between 0107:48 MYT and 0203:41 MYT.

There is no evidence of a cockpit-initiated manual Log-Off of the SATCOM.

<section end=Narrative />

References

Item 1
Factual Information (2015) 1.9.5.4

1.9.5.4 SATCOM Ground Station Logs - Key Observations in Chronological Order

7. 1803:41 - GES initiates a DATA-2 ACARS transmission (uplink), but receives no acknowledgement from the SATCOM.

a. Therefore, the SATCOM Link was lost at sometime between 1707:48 and 1803:41.

b. There is no evidence of a cockpit-initiated manual Log-Off of the SATCOM.

Notes
  1. 1707:48 UTC is 0107:48 MYT
  2. Because the SDU on the aircraft did not respond, at 1803:41 UTC and again at 1805:11 UTC, the ACARS message could not be sent. Therefore ACARS returned the message to MAS ODC with the message type MAS-F (failed) at 0206:25 MYT).


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

Coordinated Universal Time

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

Aircraft Communication and Reporting System

Satellite Communications

Satellite Data Unit

Malaysia Airlines Operations Despatch Centre

Société Internationale de Télécommunications Aéronautiques

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

Malaysia Airline Systems

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