What indicates the activation of a lavatory fire extinguisher?

The activation of a lavatory fire extinguisher is indicated by a temperature above 180 degrees Fahrenheit. This design ensures that the extinguisher is triggered in the event of a fire that generates enough heat to necessitate its use, providing a quick response to a potentially dangerous situation. The system is automated to enhance safety, allowing the extinguisher to deploy without requiring manual intervention during critical moments when staff might be occupied or unable to act immediately.

Smoke detection and manual activation by staff are processes that could alert the crew about a fire in the lavatory but do not specifically signal the activation of the fire extinguisher itself. Passenger alert mechanisms serve to inform the crew about a concern within the cabin but also do not relate directly to the activation criteria of the extinguisher. Thus, identifying the specific temperature threshold is crucial for understanding the operational mechanics of lavatory fire safety systems.