Timeline/ANDS-NIO/0238:51 MYT

MH370 DECODED
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Event Summary

02:38:51 MYT Saturday, 8 March 2014

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Malaysia Airlines ODC sent a test message to MH370, requesting an acknowledgement. The message was also re-transmitted at 0239:52 MYT, 0240:42 MYT and 0241:52 MYT. The automated response was 'failed'.


Event Details

  1. ACARS Traffic Log for MH370 (9M-MRO)

    Malaysia Airlines ODC sent a test message to MH370, requesting a response. The message content is shown below, followed by a transcript of the transmissions.
    The incoming downlink showed that the message failed. The same message was automatically retransmitted several times with the same (failed) response.

    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.

  2. ACARS Traffic Log for MH370 (9M-MRO)


    Time
    18:38:51
    Trans
    46820392
    Direction
    Outgoing Uplink
    AN
    9M-MRO
    FI
    MH0370
    Medium
    KUL
    Machine
    MHKULKJACM001
    Raw DTG
    071838
    SMI
    CMD
    Application
    RELAY
    Status
    Uplink Sent
    Message Type
    B777 Cockpit MCDU Display Uplink -- B777 Cockpit Display Uplink v1
    Source/Destination
    BKKXCXA

    QU BKKXCXA
    .DPCCAMH 071838
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.



    Time
    18:38:51
    Trans
    46820392
    Direction
    Outgoing Ground
    AN
    9M-MRO
    FI
    MH0370
    Medium
    KUL
    Machine
    MHKULKJACM001
    Raw DTG
    071838
    SMI
    CMD
    Application
    BATAPCNX
    Status
    Routed
    Message Type
    Source/Destination
    BATAP_TO_MSW

    QU BKKXCXA
    .DPCCAMH 071838
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.



    Time
    18:38:51
    Trans
    46820392
    Direction
    Outgoing Ground
    AN
    9M-MRO
    FI
    MH0370
    Medium
    KUL
    Machine
    MHKULKJACM001
    Raw DTG
    071838
    SMI
    CMD
    Application
    FILECNX
    Status
    Ground Sent
    Message Type
    B777 Cockpit MCDU Display Uplink -- B777 Cockpit Display Uplink v1
    Source/Destination
    D:\output\Flight Operation\ODC\B777\07-03-2014.CSV

    QU CPYXXXX
    .DPCCAMH 071838
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.


  3. ACARS Traffic Log for MH370 (9M-MRO)


    Time
    18:39:52
    Trans
    46820392
    Direction
    Outgoing Uplink
    AN
    9M-MRO
    FI
    MH0370
    Medium
    KUL
    Machine
    MHKULKJACM001
    Raw DTG
    071839
    SMI
    CMD
    Application
    RELAY
    Status
    Retransmitted
    Message Type
    B777 Cockpit MCDU Display Uplink -- B777 Cockpit Display Uplink v1
    Source/Destination
    BKKXCXA

    QU BKKXCXA
    .DPCCAMH 071839
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.



    Time
    18:39:52
    Trans
    46820392
    Direction
    Outgoing Ground
    AN
    9M-MRO
    FI
    MH0370
    Medium
    KUL
    Machine
    MHKULKJACM001
    Raw DTG
    071839
    SMI
    CMD
    Application
    BATAPCNX
    Status
    Routed
    Message Type
    Source/Destination
    BATAP_TO_MSW

    QU BKKXCXA
    .DPCCAMH 071839
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.



    Time
    18:40:04
    Trans
    46820392
    Direction
    Incoming Downlink
    AN
    9M-MRO
    FI
    MH0370
    Medium
    Machine
    MHKULKJACM001
    Raw DTG
    071840
    SMI
    MAS
    Application
    RELAY
    Status
    Normal
    Message Type
    MAS-F (failed)
    Source/Destination
    BKKXCXA

    QU DPCCAMH
    .BKKXCXA 071840
    MAS
    AN 9M-MRO/MA 992F
    - NO ACK         311
    ADDRESSEE: 9M-MRO

    QU BKKXCXA
    .DPCCAMH 071838
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.

    KNO 1


  4. ACARS Traffic Log for MH370 (9M-MRO)


    Time
    18:40:42
    Trans
    46820392
    Direction
    Outgoing Uplink
    AN
    9M-MRO
    FI
    MH0370
    Medium
    KUL
    Machine
    MHKULKJACM001
    Raw DTG
    071840
    SMI
    CMD
    Application
    RELAY
    Status
    Retransmitted
    Message Type
    B777 Cockpit MCDU Display Uplink -- B777 Cockpit Display Uplink v1
    Source/Destination
    BKKXCXA

    QU BKKXCXA
    .DPCCAMH 071840
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.



    Time
    18:40:42
    Trans
    46820392
    Direction
    Outgoing Ground
    AN
    9M-MRO
    FI
    MH0370
    Medium
    KUL
    Machine
    MHKULKJACM001
    Raw DTG
    071840
    SMI
    CMD
    Application
    BATAPCNX
    Status
    Routed
    Message Type
    Source/Destination
    BATAP_TO_MSW

    QU BKKXCXA
    .DPCCAMH 071840
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.



    Time
    18:41:14
    Trans
    46820392
    Direction
    Incoming Downlink
    AN
    9M-MRO
    FI
    MH0370
    Medium
    Machine
    MHKULKJACM001
    Raw DTG
    071841
    SMI
    MAS
    Application
    RELAY
    Status
    Normal
    Message Type
    MAS-F (failed)
    Source/Destination
    BKKXCXA

    QU DPCCAMH
    .BKKXCXA 071841
    MAS
    AN 9M-MRO/MA 992F
    - NO ACK         311
    ADDRESSEE: 9M-MRO

    QU BKKXCXA
    .DPCCAMH 071839
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.

    KNO 1


  5. ACARS Traffic Log for MH370 (9M-MRO)


    Time
    18:41:52
    Trans
    46820392
    Direction
    Outgoing Uplink
    AN
    9M-MRO
    FI
    MH0370
    Medium
    KUL
    Machine
    MHKULKJACM001
    Raw DTG
    071841
    SMI
    CMD
    Application
    RELAY
    Status
    Retransmitted
    Message Type
    B777 Cockpit MCDU Display Uplink -- B777 Cockpit Display Uplink v1
    Source/Destination
    BKKXCXA

    QU BKKXCXA
    .DPCCAMH 071841
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.



    Time
    18:41:52
    Trans
    46820392
    Direction
    Outgoing Ground
    AN
    9M-MRO
    FI
    MH0370
    Medium
    KUL
    Machine
    MHKULKJACM001
    Raw DTG
    071841
    SMI
    CMD
    Application
    BATAPCNX
    Status
    Routed
    Message Type
    Source/Destination
    BATAP_TO_MSW

    QU BKKXCXA
    .DPCCAMH 071841
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.



    Time
    18:42:22
    Trans
    46820392
    Direction
    Incoming Downlink
    AN
    9M-MRO
    FI
    MH0370
    Medium
    Machine
    MHKULKJACM001
    Raw DTG
    071842
    SMI
    MAS
    Application
    RELAY
    Status
    Normal
    Message Type
    MAS-F (failed)
    Source/Destination
    BKKXCXA

    QU DPCCAMH
    .BKKXCXA 071842
    MAS
    AN 9M-MRO/MA 992F
    - NO ACK             311
    ADDRESSEE: 9M-MRO

    QU BKKXCXA
    .DPCCAMH 071840
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.

    KNO 1



    Time
    18:43:33
    Trans
    46820392
    Direction
    Incoming Downlink
    AN
    9M-MRO
    FI
    MH0370
    Medium
    Machine
    MHKULKJACM001
    Raw DTG
    071843
    SMI
    MAS
    Application
    RELAY
    Status
    Normal
    Message Type
    MAS-F (failed)
    Source/Destination
    BKKXCXA

    QU DPCCAMH
    .BKKXCXA 071843
    MAS
    AN 9M-MRO/MA 992F
    - NO ACK             311
    ADDRESSEE: 9M-MRO

    QU BKKXCXA
    .DPCCAMH 071841
    CMD
    AN 9M-MRO/FI MH0370/GL KUL/MA 992I
    - QUDPCCAMH~1DIS01071838
    MESSAGE:
    DEAR MH370. PLS ACK TEST MSG. RGDS/OC.

    KNO 1





Notes

  1. This Test Message from Malaysia Airlines Operations Centre was re-transmitted at the following times:-
  2. The incoming downlink message MAS-F (failed) is an automated response. These messages were received at the following times:-
    • 1840:04 UTC (0240:04 MYT)
    • 1841:14 UTC (0241:14 MYT)
    • 1842:22 UTC (0242:22 MYT)
    • 1843:31 UTC (0243:31 MYT)
  3. Each transmission has the same ID 46820392 so each of the MAS-F (failed) messages will relate to the original transmission or one of the re-transmitted messages. However, the message was retransmitted before the first failed response, so the other failed responses are interleaved with retransmissions.
  4. In summary, the first message was unsuccessful and each of the three attempts to retransmit the message also failed.