Time:0203:23 MYT
Time:0203:23 MYT
0. Event Time and Type
Event Time: 02:03:23 MYT Edit.
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Event Type: satcom acars Edit.
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1. Summary ..................................................................................................Edit
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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’.
Content below will be transcluded into the relevant Event Details Page.
2. Details .......................................................................................................Edit
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.
Safety Investigation Report MH370/01/2018 Appendix 1.9A ACARS Traffic Log
Time
18:03:23Trans
46819784Direction
Outgoing UplinkAN
9M-MROFI
MH0370Medium Machine
MHKULKJACM001Raw DTG
071803SMI
AGMApplication
RELAYStatus
Uplink SentMessage Type
B777 Cockpit Printer Uplink for ODC -- B777 Cockpit Printer Uplink-ODCSource/Destination
QXSXMXSQU 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
18:03:24Trans
46819784Direction
Incoming DownlinkAN
9M-MROFI
MH0370Medium Machine
MHKULKJACM001Raw DTG
071803SMI
MASApplication
RELAYStatus
NormalMessage Type
MAS-L (link ack)Source/Destination
QXSXMXS
Time
18:06:25Trans
46819784Direction
Incoming DownlinkAN
9M-MROFI
MH0370Medium Machine
MHKULKJACM001Raw DTG
071806SMI
MASApplication
RELAYStatus
NormalMessage 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
3. Notes .........................................................................................................Edit
- 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.
- 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:-
- 1808:09 UTC (0208:09 MYT)
- 1810:00 UTC (0210:00 MYT)
- 1811:50 UTC (0211:50 MYT)
- 1813:40 UTC (0213:40 MYT)
- 1815:23 UTC (0215:23 MYT)
- 1817:11 UTC (0217:11 MYT)
- 1818:14 UTC (0218:14 MYT)
- An automated response at 1819:34 UTC (0219:34 MYT) has a message Status of Trashed.
- The ACARS Traffic Log does not contain any further transmissions related to this message.
- The extract (above) stated that 'the message was retransmitted until 1843:33 UTC' but evidence of that is not available.
- Malaysia Airlines sent a different message at 1838:51 UTC (0238:51 MYT).
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References for events at or about the time of 0243:33 MYT, 8 March 2014 (1843:33 UTC, 7 march 2014).
This event is included in the Timeline during the Air Turn Back. Air Turn Back
Narrative
<section begin=Narrative />
02:43:33 MYT
ACARS: messages retransmitted
The ACARS message from MAS ODC, first sent at 0203:23 MYT, were retransmitted until 1843:33 UTC but all messages failed. None reached the aircraft.
<section end=Narrative />
References
Item 1
- RefID:Factual Information March 2015/1.9.4.1
1.9.4.1 ACARS Traffic Log
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 ATCC 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 1.9J and 1.9K, respectively.
Figure 1.9J: Message from MH ODC
Figure 1.9K: Automated Downlink Message
Notes
- Although it is stated that the message was retransmitted until 1843:33 UTC only six transcripts have been provided in the Factual Information.