Flight MH370/2014-03-07/23-54-31 MYT: Difference between revisions

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<p>7 March 2014 &nbsp; [[Flight MH370/2014-03-07/23-54-31 MYT|23:54:31 MYT]]</p>
<p>7 March 2014 &nbsp; [[Flight MH370/2014-03-07/23-54-31 MYT|23:54:31 MYT]]</p>
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[[Category:Pre-Flight]]
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Latest revision as of 09:15, 24 August 2026

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Event Metadata

Flight ID MH370
Event Type Add Desc
Date and Time MYT 7 March 2014 23:54:31 MYT
Date and Time UTC 7 March 2014 15:54:31 UTC
Flight Phase Phase 1
Data Source Add Data Source Add Items
Date and Time ISO 8601 2014-03-07T15:54:31Z
ISO 8601 Description Flight MH370 Event at 2014-03-07T15:54:31Z

Add Image Link 

‎

Event Summary

 23:54:31 MYT Friday 7 March 2014

Chronology

Malaysia Airlines Operations Centre contacted MH370 by sending an ACARS message (over VHF) suggesting that VHF3 be switched (from data) to voice if the SATCOM system was operational (serviceable). Future communications to and from the aircraft by ACARS would then be (automatically) sent via the SATCOM system.


Event Details

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


    Time
    15:54:31    		 Trans
    46817955    		 Direction
    Outgoing Uplink    		 AN
    9M-MRO    		 FI
    MH0370    		 Medium
    KUL    		 Machine
    MHKULKJACM001    		 Raw DTG
    071554    		 SMI
    CMD    		 Application
    RELAY
    Status
    Uplink Sent    		 Message Type
    Frequency Auto-tune -- Frequency Auto-tune B777    		 Source/Destination
    BKKXCXA

    QU BKKXCXA
    .DPCCAMH 071554
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 988I
    - QUDPCCAMH~1RA101071554
    Message:
    SWITCH VHF3 TO VOICE
    (131.550)
    IF SATCOM SERVICABLE
    FROM MH OPS



    Time
    15:54:31    		 Trans
    46817955    		 Direction
    Outgoing Ground    		 AN
    9M-MRO    		 FI
    MH0370    		 Medium
    KUL    		 Machine
    MHKULKJACM001    		 Raw DTG
    071554    		 SMI
    CMD    		 Application
    BATAPCNX
    Status
    Routed    		 Message Type
    		 Source/Destination
    BATAP_TO_MSW

    QU BKKXCXA
    .DPCCAMH 071554
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 988I
    - QUDPCCAMH~1RA101071554
    Message:
    SWITCH VHF3 TO VOICE
    (131.550)
    IF SATCOM SERVICABLE
    FROM MH OPS



    Time
    15:54:36    		 Trans
    46817955    		 Direction
    Incoming Downlink    		 AN
    9M-MRO    		 FI
    MH0370    		 Medium
    KUL    		 Machine
    MHKULKJACM001    		 Raw DTG
    071554    		 SMI
    MAS    		 Application
    RELAY
    Status
    Normal    		 Message Type
    MAS-S (successful)    		 Source/Destination
    BKKXCXA

    QU DPCCAMH
    .BKKXCXA 071554
    MAS
    AN 9M-MRO/FI MH0/MA 988S
    DT BKK KUL 071554 S05A


Notes

  1. ACARS can send data via the satellite communications system (SATCOM) or over a VHF data-link. The VHF radio must be switched from voice to data for this to occur.
  2. VHF radio is commonly used for data at or near an airport, where the service provider has a transceiver to provide the ACARS service.
  3. It seems that for flight MH370, ACARS was initially communicating via VHF.
  4. This message from Malaysia Airlines Operations Centre suggests that the VHF radio be switched to voice-only, using channel 131.550 MHz - if the SATCOM is serviceable, meaning that the SATCOM could transmit and receive future ACARS messages.
  5. This ACARS message was included in the Safety Investigation Report MH370/01/2018 Appendix 1.9A but not in the previous version Factual Information MH370/01/15 Appendix 1.9A.


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

7 March 2014   23:54:31 MYT

Add Summary

‎ ‎

Flight Identifier, for example MH370

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

Coordinated Universal Time

Aircraft Communication and Reporting System

Very High Frequency

Satellite Communications

Aircraft Number

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

Flight ID

Flight ID MH370

Kuala Lumpur

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

Boeing 777 aircraft

Aircraft Number (Registration) 9M-MRO

Valid Flight ID: MH370

Operations

Malaysia Airline Systems

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

Megahertz

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