Flight MH370/2014-03-08/01-07-56 MYT

01:07:56 MYT Saturday 08 March 2014

MH370 reported maintaining FL350 again at 1707:56 UTC (0107:56 MYT).

Safety Investigation Report MH370/01/2018 1.1.1

MH370 reported maintaining FL350 at 1701:17 UTC (0101:17 MYT) and reported maintaining FL350 again at 1707:56 UTC (0107:56 MYT).

Safety Investigation Report MH370/01/2018 Appendix 1.18E

AIR-GROUND COMMUNICATION LUMPUR RADAR - FREQUENCY 132.6 MHz
Time	Source	CONTENT
1707:56 UTC (0107:56 MYT)	MAS 370	Ehhh… Seven Three Seven Zero maintaining level three five zero.
1708:02 UTC [0108:02 MYT]		Malaysian Three Seven Zero.

Safety Investigation Report MH370/01/2018 2.2.8 1) Analysis of ATS Operational Issues after Last Radio Communication with MH370 and subsequent Activities/Actions taken
(e) Maintaining FL350 Transmitted Twice

At 1701:17 UTC [0101:17 MYT] MH370 made a radio transmission: “Maintaining flight level three five zero three seven zero” and again at 1707:56 UTC [0107:56 MYT].

The MAS Standard Operating Procedures (SOPs) for flight crew dictated that the PIC and the FO would have to be on-seat during the following phrases of flight:
- Take-off;
- Climbing and descending; and
- Approach and landing.
However, one of the flight crew could leave the cockpit for a break once the aircraft had maintained the assigned cruising level.

The voice recognition process (para 1.5.11) has established that the PIC made the radio transmission of maintaining flight level three five zero at 1701:17 UTC [0101:17 MYT] and again at 1707:56 UTC [0107:56 MYT].

The interval between the first and second radio transmission was 6 minutes and 39 seconds.

Repetition of radiotelephony communications happens occasionally. While the Team could not determine the reason for the additional transmission at this stage of the flight, it was noted that it was anomalous at this time.

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