MH370 Timeline - Deviation From Flight Plan/0203:23 MYT

02:03:23 MYT Saturday, 8 March 2014

This page provides details for events related to Malaysia Airlines Flight MH370 which occurred at or near the time of 02:03:23 MYT Saturday, 8 March 2014.
Note: Malaysian Time (MYT) is Coordinated Universal Time (UTC) plus 8 hours. Return to Timeline

Summary

Malaysia Airlines ODC sent an ACARS message to MH370, direct to the cockpit printer. The ACARS message requested the crew to contact the HCM ACC immediately. The incoming downlink message at 1803:24 UTC showed the message failed to reach the aircraft. The message was retransmitted (automatically) at least seven times. On each occasion, an automated downlink message by ACARS showed ‘failed’.

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Event Details

1. Safety Investigation Report MH370/01/2018 1.9.4 Aircraft Communications Addressing and Reporting System

   The first message sent to the aircraft cockpit printer from the MAS ODC was at 1803:23 UTC. The ACARS message requested the crew to contact the HCM ACC immediately. The incoming downlink message at 1803:24 UTC showed the message failed to reach the aircraft. Messages are auto transmitted every 2 minutes and the message was retransmitted until 1843:33 UTC but all messages failed to get a response. Automated downlink message by ACARS showed ‘failed’. Message sent to the aircraft cockpit printer and the Automated Downlink messages are shown in Figures 1.9I and 1.9J (below), respectively.

   Note: Instead of the images in Figures 1.9I and 1.9J the transcript of the ACARS message is shown below.

2. Safety Investigation Report MH370/01/2018 Appendix 1.9A ACARS Traffic Log

   
   

   Time 18:03:23	Trans 46819784	Direction Outgoing Uplink	AN 9M-MRO	FI MH0370	Medium	Machine MHKULKJACM001	Raw DTG 071803	SMI AGM	Application RELAY
   Status Uplink Sent		Message Type B777 Cockpit Printer Uplink for ODC -- B777 Cockpit Printer Uplink-ODC			Source/Destination QXSXMXS

   QU QXSXMXS
   .DPCCAMH 071803
   AGM
   AN 9M-MRO/FI MH0370/MA 991I
   -
   =======================================
   I   MALAYSIA AIRLINES - ODC             I
   =======================================
   URGET REQUEST
   
   PLS CONTACT HO CHI MING ATC ASAP
   
   THEY COMPLAIN CANNOT TRACK YOU ON THEIR RADAR
   
   I RECEIVED CALL FROM SUBANG CENTRE
   
   PLS ACK THESE MSG
   
   REGARDS
   MARVIN

   
   

   Time 18:03:24	Trans 46819784	Direction Incoming Downlink	AN 9M-MRO	FI MH0370	Medium	Machine MHKULKJACM001	Raw DTG 071803	SMI MAS	Application RELAY
   Status Normal		Message Type MAS-L (link ack)			Source/Destination QXSXMXS

   QU DPCCAMH
   .QXSXMXS 071803
   MAS
   AN 9M-MRO/FI MH0370/MA 991L

   
   

   Time 18:06:25	Trans 46819784	Direction Incoming Downlink	AN 9M-MRO	FI MH0370	Medium	Machine MHKULKJACM001	Raw DTG 071806	SMI MAS	Application RELAY
   Status Normal		Message Type MAS-F (failed)			Source/Destination

       QXSXMXS
   

   QU DPCCAMH
   .QXSXMXS 071806
   MAS
   AN 9M-MRO/FI MH0370/MA 991F
   - UP INTERCEPT AIRCRAFT NOT LOGGED ON 234
   QU QXSXMXS
   .DPCCAMH 071803
   AGM
   AN 9M-MRO/FI MH0370/MA 991I
   -
   =======================================
   I   MALAYSIA AIRLINES - ODC             I
   =======================================
   URGET REQUEST
   
   PLS CONTACT

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Notes

1. Additional transmissions related to this ACARS message are included in the ACARS Traffic Log for MH370 (9M-MRO) released by the Ministry of Transport (Malaysia) in September 2018.
2. This message from MAS ODC to MH370 was first sent at 18:03:23 UTC (02:03:23 MYT) and retransmitted at the following times:-
   
   1. 1808:09 UTC (0208:09 MYT)
   2. 1810:00 UTC (0210:00 MYT)
   3. 1811:50 UTC (0211:50 MYT)
   4. 1813:40 UTC (0213:40 MYT)
   5. 1815:23 UTC (0215:23 MYT)
   6. 1817:11 UTC (0217:11 MYT)
   7. 1818:14 UTC (0218:14 MYT)
3. An automated response at 1819:34 UTC (0219:34 MYT) has a message Status of Trashed.
4. The ACARS Traffic Log does not contain any further transmissions related to this message.
5. The extract (above) stated that 'the message was retransmitted until 1843:33 UTC' but evidence of that is not available.
6. Malaysia Airlines sent a different message at 1838:51 UTC (0238:51 MYT).

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Documents and Related Articles

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

Operations Despatch Centre

Aircraft Communication and Reporting System

Ho Chi Minh (Viet Nam) Area Control Centre (or Air Traffic Control Centre)

satellite communication from the aircraft to the ground earth station

Coordinated Universal Time

Malaysia Airlines Operations Despatch Centre

satellite communication from the aircraft to the ground earth station

satellite communications from ground to the aircraft earth station

Aircraft Number

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

Flight ID

Flight ID MH370

Unique hardware (machine) ID

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

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

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

Standard Message Identifier

Boeing 777 aircraft

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

Aircraft Number (Registration) 9M-MRO

Valid Flight ID: MH370

URGENT REQUEST

Please contact Ho Chi Minh Air Traffic Control as soon as possible

Radio Detection and Range

Please acknowledge these messages

Malaysia Airline Systems

An automated 'acknowledged' response by ACARS; similar in meaning to 'the message was sent'.

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

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

Please contact