MD-11 Flight Crew Operations Manual
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Fire Protection -
Description and Operation
Fire.10.9
Approximately 90 minutes after the agent 1 bottle has been discharged, DISCH
AGENT 2 light will flash to indicate that agent 2 bottle should be discharged.
The agent 2 fire extinguishing bottle is considerably smaller than the agent 1 fire
extinguishing bottle.
If smoke or heat is detected in the forward or aft compartments, ventilation airflow
to the compartments automatically shuts off. This isolates that compartment prior
to agent discharge.
Lavatory Fire Detection
Three smoke detection panels are installed at galley G1: Two detection panels for
the FWD and AFT lavatories. One detection panel for cockpit and lower deck
crew rest. When smoke is sensed, the following will happen:
• A red warning light flashes above the respective lavatory or crew rest
door.
• An intermittent high pitch tone sounds every five seconds as long as the
smoke detectors are activated.
• A red indicator light on the smoke detection panel flashes.
• A horn in the smoke detection panel sounds.
• In case of a crew rest smoke condition a level 2 CREW REST SMOKE
alert is displayed.
When smoke is detected, the lavatory fan will be automatically shut off. The fan
can be reset with a LAVATORY FAN RESET P/BV below the smoke detection
panel.
Lavatory Fire Extinguishing
A disposable fire extinguisher is installed adjacent to the trash container in each
lavatory. The system is automatic and self-contained. When the temperature at the
extinguisher discharge tube tips is between 76.6 ºC and 80.5 ºC the tube tips melt
allowing the extinguishing agent to be discharged into the container.
October 02, 2006
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