Where does the lavatory fire extinguisher discharge when exposed to temperatures above 180 F?

• A. Discharges into the cabin
• B. Discharges into a trash chute
• C. Discharges into the lavatory drain
• D. Discharges into the baggage compartment

Answer: (B)

The system is designed to target the most likely fire source in the lavatory: the waste bin. When the lavatory experiences high heat (around 180°F), a temperature-sensitive element in the extinguisher head ruptures and releases the extinguishing agent directly into the lavatory trash chute. This focused discharge quickly suppresses any fire in the bin without dumping chemicals into the cabin, lavatory drain, or baggage areas. The other locations would not effectively address a bin fire and could spread the agent or cause unnecessary exposure or complications.