50 Years of Operation

Up Fire Protection Controls System Schematics

 

The bypass design of the engines reduces the external casing temperature significantly which subsequently reduces the risk of engine bay fires.

The design also ensured no aircraft systems carried combustible liquids through the engine bays, other than hydraulic vents.

The overheat detection system covers the main engines and secondary power system bays and utilises a continuous sensing element. The control units are mounted outside these areas with the sensing element forming loops around the bays.  Areas covered include the combustion chambers, engine accessories , ventilation air outlet, air conditioning bleed pipe, secondary power system.

the suppression system is controlled from the front cockpit by the selection of each extinguisher button or by the crash switch. The system can discharge into one or both engine bays. The fire extinguisher bottle is mounted on the interface between the No.2 engine compartment and the outer skin. It is a dual head unit with two operating cartridges.
        - Two gauges are provided to show system status,
        - All components are easily accessible,
        - Extinguisher bottle easily removed/replaced,
        - Post flight BITE checks to confirm detection system,
        - Minimal post discharge maintenance actions.