Factual Information 2015:1.6 Aircraft Information/1.6.3/1.6.3.8
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.
1.6.3.8 Engine Health Monitoring
Engine Health Monitoring (EHM) is contracted out to Rolls Royce, the engine manufacturer.
Engine data ‘snapshot’ reports are generated by the Aircraft Condition Monitoring System (ACMS) and transmitted via ACARs to MAS, who then submit 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
The EHM system trend reports over the last 3 months which cover ‘snapshot’ data points gathered at take-off, climb and cruise received through the ACMS show no evidence of unusual engine behaviour for both engines. On the occurrence flight, 2 EHM reports were transmitted; the first was a Take-off report generated at 1641:58 UTC, 07 March 2014 (0041:58 MYT, 08 March 2014) and the second was a Climb report at 1652:21 UTC, 07 March 2014 (0052:21 MYT, 08 March 2014). 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 are shown in Appendix 1.6B - Engine Health Monitoring Decoded Data for Take-off and Climb Reports. The ACMS will also generate other pre-defined engine reports including engine parameters’ exceedance reports. However no such EHM reports were received during the flight.
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.