Communications:9M-MRO EHM Reports

MH370 DECODED
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MH370: Engine Health Monitoring Reports

Background

Two Engine Health Monitoring reports were transmitted from the Boeing 777 aircraft registered 9M-MRO on flight MH370:-

  1. the first was a Take-Off Report generated at 1641:58 UTC, 07 March 2014 [0041:58 MYT, 08 March 2014] and,
  2. the second was a Climb Report at 1652:21 UTC, 07 March 2014 [0052:21 MYT, 08 March 2014].


Engine Health Monitoring (EHM) was contracted out to Rolls Royce, the engine manufacturer. Engine data ‘snapshot’ reports were generated by the Aircraft Condition Monitoring System (ACMS) and transmitted via ACARS to MAS, who then submitted them to Rolls Royce for analysis on its behalf. The transmitted engine parameters primarily used to assess engine health are:

  • Turbine Gas Temperature
  • Shaft Speeds
  • Shaft Vibration (Low Pressure, Intermediate Pressure and High Pressure)
  • Oil Pressure
  • Oil Temperature

Reports are transmitted by ACARS at convenient times during the flight (not necessarily at the time of generation/data capture). Both reports did not show any unusual engine behaviour.

The data transmitted on these reports, sourced from Safety Investigation Report MH370/01/2018 Appendix 1.6B - Engine Health Monitoring Decoded Data for Take-off and Climb Reports, is shown in the sub-pages Take-Off Report and Climb Report.

The description for each parameter, also sourced from Safety Investigation Report MH370/01/2018 Appendix 1.6B - Engine Health Monitoring Decoded Data for Take-off and Climb Reports, is shown in the sub-page EHM Parameter Key.

Source: Adapted from Safety Investigation Report MH370/01/2018 1.6.4 Airworthiness and Maintenance 8) Engine Health Monitoring