Factual Information 2015:Appendix 1.6E/1.6E.6
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.
1.6E.6 Fire Protection
Fire protection and overheat detection systems are provided for the Engines, APU, wheel well, cargo compartment and the pneumatic ductings.
The Rolls Royce engine has a dual loop fire detection system that monitors the external areas of the engine. The detectors monitor the engine for fire and overheat conditions. Detector signals are monitored by a detection card and sends signals to the cockpit indication system. The engines have a two shot fire extinguishing system. The pilot can select to discharge the fire bottle. Halon gas will be discharged through nozzles positioned around the engine.
The APU has a dual loop fire detection system around the APU compartment. If a fire condition is detected, a signal is sent to the detection card. This will automatically activate a single shot fire extinguishing system that will discharge Halon gas into the APU compartment.
The wheel well fire detection system monitors the wheel well for brake and tyre fires.
The forward cargo compartment and aft cargo compartment have smoke detectors to monitor the air. The smoke detectors analyse the air for smoke particles. The forward cargo smoke detector also process signals from the main equipment centre cooling smoke detector.
The cargo compartment has an extinguishing system that comprises of five extinguishing bottles fitted in the forward cargo compartment. There are series of pipes that connect the bottles to the forward and aft cargo compartments. The detection and extinguishing system is monitored through a smoke detection card file and annunciated in the cockpit.
The high pressure pneumatic ducting from the engines and the APU have overheat protection. Should a duct leak be detected the associated pneumatic system will be isolated.
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.