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B - Bottle pressure drop only.
C - Both.
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26 - FIRE PROTECTION
26-17-00 LAVATORY FIRE PROTECTION SYSTEM
PRESENTATION
CONTENTS:
Smoke Detectors
Smoke Detection Control Unit (SDCU)
Smoke Warnings
Self Examination
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LAVATORY FIRE PROTECTION SYSTEM PRESENTATION
SMOKE DETECTORS
An ambient smoke detector is installed on each
lavatory, located in the ceiling panel, beside the air
extraction duct. The lavatory smoke detectors are
interconnected to each other. They are part of a loop,
containing the cargo smoke detectors (if cargo smoke
detection is installed), which is connected to the
Smoke Detection Control Unit (SDCU).
The smoke detector is a photo-electric cell smoke
detector based on the principle of reverse scattered
light.
SMOKE DETECTION CONTROL UNIT
In case of a detected lavatory smoke, the Smoke
Detection Control Unit (SDCU) activates the smoke
warnings in the cockpit and the passenger cabin. The
Smoke Detection Control Unit (SDCU) monitors all the
lavatory smoke detectors.
SMOKE WARNINGS
The Smoke Detection Control Unit sends the lavatory
smoke warning signals to the ECAM and Cabin
Intercommunication Data System (CIDS). It also
provides the fault messages to the Centralized Fault
Display System (CFDS). An option disables lavatory
warnings on the ECAM. Note that for lavatory fire
extinguishing, a cabin portable fire extinguisher must
be used.
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SELF EXAMINATION
Lavatory fire extinguishing is performed by:
A - Portable extinguisher.
B - Fire bottle.
C - Waste bin fire extinguisher.
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26 - FIRE PROTECTION
26-16-00 CARGO AND LAVATORY SMOKE
DETECTION SYSTEM
CONTENTS:
General
Lavatory Smoke
Lavatory Fault
Cargo Smoke (Option)
Cargo Fault (Option)
Bottle Fault
Smoke Detection Control Unit (SDCU) Fault
Self Examination
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CARGO AND LAVATORY SMOKE DETECTION SYSTEM
GENERAL
The cargo and lavatory smoke detectors are connected
to both channels of the Smoke Detection Control Unit
(SDCU) via a safety two wire data and supply bus working
following the closed loop principle.
Note that the cargo fire protection is optional and
independent for each compartment but cargo fire
extinguishing requires smoke detection.
LAVATORY SMOKE
When lavatory smoke is detected, the Smoke Detection
Control Unit (SDCU) provides the SMOKE warning signal
to the cockpit and to the cabin.
When smoke is detected in a lavatory, the following
warnings are activated:
- In the cockpit, through the Flight Warning
Computers (FWCs), the repetitive chime, the
MASTER WARN flashing light and ECAM message.
Note that an option disables all lavatory
warnings in the cockpit.
- In the cabin, through the Cabin
Intercommunication Data System (CIDS)
directors, the triple chime, the SMOKE LAV
light on the Forward Attendant Panel, the red
flashing light and clear message on the
　
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