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protection is optional (smoke detection and fire
extinguishing separately).
Note that an option with a second bottle enables fire
extinguishing extended duration for Etops.
LAVATORY FIRE PROTECTION
The lavatory fire protection is provided by two
systems: The lavatory smoke detection system and the
waste bin automatic fire extinguishing system.
PORTABLE FIRE EXTINGUISHERS
The portable fire extinguishers are used for fighting
fire in the cockpit and cabin.
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26 - FIRE PROTECTION
26-12-00 SYSTEM PRESENTATION
CONTENTS:
General
Fire Detectors
Fire Detection Unit (FDU)
Warnings
Test P/B
Engine Fire P/B
Agent P/B
Bottles
Self Examination
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SYSTEM PRESENTATION
GENERAL
The engine fire protection is provided by two systems:
The fire detection and the fire extinguishing systems.
FIRE DETECTORS
Each engine fire detection system consists of two
independent loops A and B connected in parallel to the
Fire Detection Unit (FDU). Each loop comprises three
fire detectors connected in parallel. Loops A and B
are connected in parallel to the Fire Detection Unit
(FDU). Each loop comprises:
- Fan fire detector
- Pylon fire detector
- Core fire detector
FIRE DETECTION UNIT (FDU)
One Fire Detection Unit is provided for each
engine. The Fire Detection Unit (FDU) processes
signals received from the fire detectors.
WARNINGS
The Fire Detection Unit generates signals for ECAM
display, Centralized Fault Display System utilization
and cockpit local warnings.
- Fire warning signals are sent to ECAM and engine
fire and start control panels.
- Loop failure warnings are sent to ECAM and
Centralized Fault Display System (CFDS).
TEST P/B
On the engine fire panel the TEST pushbutton permits
the fire detection and the extinguishing systems to
be checked. During the test, the SQUIB lights come on
if the continuity of the squib circuit is correct. The
DISCH lights are also activated but as a lamp test.
The TEST pushbutton checks simultaneously the
integrity of the:
- Fire detection loops A and B, FDU, indications
and warnings.
- Squib circuit continuity of AGENT 1 and 2.
ENGINE FIRE P/B
When the ENGINE FIRE pushbutton is released out, the
SQUIB lights come on and the extinguishing system is
armed. At the same time, the engine is isolated from
the other aircraft systems. When the ENG FIRE
PUSHbutton is released out:
- Both SQUIB lights come on indicating bottle
percussion is available.
- Aircraft systems are isolated.
AGENT P/B
Action on the AGENT pushbutton provides bottle
discharge when the ENGINE FIRE PUSHbutton is still
released out. A pressure switch activates the
corresponding DISCH light when the agent has been
discharged.
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SYSTEM PRESENTATION
BOTTLES
Two extinguisher bottles are installed in the pylon.
Each bottle is equipped with a pressure switch to
monitor agent pressure and an electrically operated
SQUIB, for agent discharge.
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