At what temperature does the lavatory automatic fire extinguisher discharge?

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Multiple Choice

At what temperature does the lavatory automatic fire extinguisher discharge?

Activation is driven by a heat-sensitive element in the lavatory extinguisher that trips when the ambient temperature reaches a specific setpoint. That setpoint is 170°F (77°C). This value is chosen to balance two needs: it’s high enough to avoid accidental discharge from normal cabin heat or brief warm spots, but low enough to ensure rapid activation if a fire starts in the confined lavatory space. If the trigger were much lower, nuisance discharges could happen; if it were much higher, the fire might grow larger before suppression begins.

Activation is driven by a heat-sensitive element in the lavatory extinguisher that trips when the ambient temperature reaches a specific setpoint. That setpoint is 170°F (77°C). This value is chosen to balance two needs: it’s high enough to avoid accidental discharge from normal cabin heat or brief warm spots, but low enough to ensure rapid activation if a fire starts in the confined lavatory space. If the trigger were much lower, nuisance discharges could happen; if it were much higher, the fire might grow larger before suppression begins.

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