Communications:9M-MRO Position Report

MH370 DECODED
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9M-MRO Position Report

Background

During flight, MH370 should have transmitted position reports via ACARS every 30 minutes. Position information is collected every five minutes and collated into the transmitted Position Report.

The first (which was also the last) position report was transmitted via ACARS at 1707:29 UTC, 07 March 2014 [0107:29 MYT, 08 March 2014]. This was a collation of 6 reports generated at 5-minute intervals by the system at 1641:43 UTC, 1646:43 UTC, 1651:43 UTC, 1656:43 UTC, 1701:43 UTC and 1706:43 UTC, 07 March 2014. Parameters transmitted are as per Table 1.9A (below). The actual traffic log on the position report is reproduced in Figure 1.9H (below). Position reports were programmed to be transmitted every 30 minutes.

Note: Aircraft position information is also included in the EHM take-off and climb reports.

Source: Safety Investigation Report MH370/01/2018 1.9.4 Aircraft Communications Addressing and Reporting System



1. B777 Position Report (ACARS)


Time
17:07:29
Trans
46818992
Direction
Incoming Downlink
AN
9M-MRO
FI
MH0370
Medium
IOR2
Machine
MHKULKJACM001
Raw DTG
071707
SMI
DFD
Application
RELAY
Status
Normal
Message Type
DFD B777 Position Report (NEW)
Source/Destination
QXSXMXS

QU DPCCAMH
.QXSXMXS 071707
DFD
FI  MH0370/AN  9M-MRO
DT  QXT  IOR2071707  D03A
-  MAS001A0      B777 POSITION REPORT        565

ACID FLT FM FLCT DATE DPT DST
MRO S370 TR 318 07/03/14 WMKK ZBAA
SWID SFC
316A-BSM-710-02 18661
GMTALT CAS MACH TAT SAT LAT LONG
164143 103 168.4 .255 31.1 27.3 2.767 101.715
164643 10582 261.8 .478 23.4 10.4 3.074 101.760
165143 21193 301.1 .669 11.6 -11.8 3.553 101.988
165643 28938 303.1 .783 2.6 -27.4 4.109 102.251
170143 34998 278.0 .819 -13.4 -43.9 4.708 102.534
170643 35004 278.4 .821 -13.1 -43.8 5.299 102.813
GWT TOTFW WINDIR WINDSP THDG
492520 49200 140.3 1.25 -33.5
489200 47800 107.6 9.38 27.3
486240 46500 91.8 19.50 27.8
483840 45400 58.4 10.63 26.0
481880 44500 69.6 17.38 26.8
480600 43800 70.0 17.13 26.7



Source: Safety Investigation Report MH370/01/2018 Appendix 1.9A

Also included in Safety Investigation Report MH370/01/2018 as Figure 1.9H - Position Report

Note: Additional ACARS messages related to this transmission are included in the ACARS Traffic Log for MH370 (9M-MRO).



2. Table 1.9A - ACARS Position Report

In this Table the ACARS message data is formatted with the relevant headings.



Greenwich Mean Time (GMT) - UTC 1641:43 1646:43 1651:43 1656:43 1701:43 1706:43
Altitude (ALT) – Feet 103 10,582 21,193 28,938 34,998 35,004
Calibrated Airspeed (CAS) - Knots 168.4 261.8 301.1 303.1 278.0 278.4
MACH 0.255 0.478 0.669 0.783 0.819 0.821
Total Air Temperature (TAT) - °C 31.1 23.4 11.6 2.6 -13.4 -13.1
Static Air Temperature (SAT) - °C 27.3 10.4 -11.8 -27.4 -43.9 -43.8
Latitude (LAT) 2.767 3.074 3.553 4.109 4.708 5.299
Longitude (LONG) 101.715 101.760 101.988 102.251 102.534 102.813
Gross Weight (GWT) – lb 492,520 489,200 486,240 483,840 481,880 480,600
Total Remaining Fuel Weight (TOTFW) - kg 49,200 47,800 46,500 45,400 44,500 43,800
Wind Direction (WINDIR) 140.3 107.6 91.8 58.4 69.6 70.0
Wind Speed (WINDSP) 1.25 9.38 19.50 10.63 17.38 17.13
True Heading (THDG) -33.5 27.3 27.8 26.0 26.8 26.7
Note: Values in bold have been corrected using data from the original ACARS position report.

Table 1.9A - ACARS Position Report
Source: Safety Investigation Report MH370/01/2018 1.9 Communications