Factual Information 2015:1.5 Personnel Information/1.5.10
This page contains an extract from MH370/01/15 Factual Information which accompanied the (first) Interim Statement released by The Malaysian ICAO Annex 13 Safety Investigation Team for MH370 on 8th March 2015.
1.5.10 Air-ground Communications
The radio transmissions made between MH370 and the ground air traffic control were studied. The team used the pilots, friends, family members, expert report of objective analysis of the radio transmissions in the voice recognition of the transmissions made between MH370 and ground air traffic control.
Five sets of audio recordings were analysed starting from Airway Clearance Delivery at 1625:52 UTC (0025:52 MYT) till the last utterance from Lumpur Radar at 1719:30 UTC (0119:30 MYT). There were a total of 23 utterances as follows:
a. Airway Clearance Delivery (ACD) -
b. Lumpur Ground (LG) -
c. Lumpur Tower (LT) -
d. Approach Radar (AR) -
e. Lumpur Radar (LR) -
frequency 126.0 MHz
frequency 122.27 MHz
frequency 118.8 MHz
frequency 121.25 MHz
frequency 132.6 MHz
→ 4 utterances
→ 6 utterances
→ 4 utterances
→ 3 utterances
→ 6 utterances
From the information available, the first 3 sets of audio recordings (ACD, LG, LT), the speech segments are those of the Flight Officer before take-off, and the 4th & 5th (AR & LR) sets of the audio recordings originated from the Captain after take-off.
The 'Flight Officer' should be the 'First Officer'.
Source: Malaysian ICAO Annex 13 Safety Investigation Team for MH370, 8 March 2015, Factual Information MH370/01/15
The Factual Information was updated in 2018 by the Safety Investigation Report MH370/01/2018 which added new content but did not include all of the previous data.
The following Table has been developed from the information in Section 1.5.10 Air-ground Communications and transcripts in Appendices 1.18A to 1.18E.
| Start | End | MH370 | Ground | Frequency | Content | |
|---|---|---|---|---|---|---|
| a | 1625:52 UTC [0025:52 MYT] |
1626:59 UTC [0026:59 MYT] |
First Officer | Airways Clearance Delivery (ACD) | 126.0 MHz | Appendix 1.18A |
| b | 1627:31 UTC [0027:31 MYT |
1636:30 UTC [0036:30 MYT] |
First Officer | Lumpur Ground (LG) | 122.27 MHz | Appendix 1.18B |
| c | 1636:30 UTC [0036:30 MYT] |
1640:40 UTC [0040:40 MYT] |
First Officer | Lumpur Tower (LT) | 118.8 MHz | Appendix 1.18C |
| d | 1642:50 UTC [0042:50 MYT] |
1646:42 UTC [0046:42 MYT] |
Captain | Approach Radar (AR) | 121.25 MHz | Appendix 1.18D |
| e | 1646:55 UTC [0046:55 MYT] |
1719:30 UTC [0119:30 MYT] |
Captain | Lumpur Radar (LR) | 132.6 MHz | Appendix 1.18E |