What does the Engine Fire Detection system consist of?

The Engine Fire Detection system in the Pilatus PC-12 NG is primarily composed of a stainless steel tube filled with helium gas and a hydrogen-charged core. This tube functions as a sensing element that detects the presence of a fire within the engine compartment. The helium gas is specifically chosen due to its responsiveness to temperature changes: when exposed to high temperatures indicative of a fire, the helium expands and activates the system.

This detection mechanism is crucial for ensuring the safety of the aircraft by providing early warnings of potential engine fires, allowing for timely corrective actions. A robust design using stainless steel ensures durability and reliability in the extreme conditions to which aircraft engines are subjected. Understanding how the system operates and its components is essential for pilots and crew members to respond appropriately in emergency situations.