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Attendant Indication Panel, the amber flashing
light on the Area Call Panel and an amber
flashing light on the affected lavatory.
LAVATORY FAULT
When a lavatory smoke detector failure is detected by
the SDCU, the faulty detector is automatically isolated
from the loop.
The lavatory detection fault is indicated in the
cockpit and the cabin.
The inoperative lavatory smoke detector is indicated
to:
- The CFDIU, for maintenance purposes.
- The FWC, for ECAM indication.
- The CIDS directors, for the Forward Attendant
Panel amber CIDS CAUT light and the Programming
and Test Panel (PTP) indication.
NOTE: With CIDS CAUT light ON, the CIDS SYSTEM STATUS
page on the PTP must be interrogated to find the
affected lavatory.
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CARGO AND LAVATORY SMOKE DETECTION SYSTEM
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CARGO AND LAVATORY SMOKE DETECTION SYSTEM
CARGO SMOKE
When cargo smoke is detected, the SDCU provides the
SMOKE warning signal to the cockpit through the Flight
Warning Computers (FWC).
When smoke is detected in one compartment, (AFT shown
as example), the following warnings are activated:
- The repetitive chime, the MASTER WARN light,
the ECAM message and the SMOKE light on the
CARGO SMOKE panel.
CARGO FAULT
When a cargo smoke detector is detected faulty by the
SDCU, it is automatically isolated from the loop.
When the two detectors of the same cavity are detected
faulty, a cargo smoke detection fault message is
displayed on the ECAM.
The inoperative detectors (BULK shown as example) are
also indicated to the CFDIU.
BOTTLE FAULT
In case of a fire bottle pressure drop or a loss of
electrical squib continuity, the SDCU sends signals
to the ECAM and CFDS.
When a discontinuity occurs on the squib circuit, the
following warning is activated by the FWCs:
- Single chime, MASTER CAUT light and ECAM
message.
The inoperative squib is also indicated to the CFDIU.
SMOKE DETECTION CONTROL UNIT (SDCU) FAULT
When an internal failure of the SDCU is detected, a
SDCU fault warning signal is sent to the cockpit.
In case of failure of one channel, the smoke detection
is still ensured by the remaining channel.
In case of failure of both channels, the fault is
displayed on the ECAM, accompanied by the single chime
and MASTER CAUT light. The failure is also indicated
to the CFDIU.
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EFFECTIVITY 26-16-00 Page 4
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SELF EXAMINATION
If smoke is detected in a cargo compartment what
happens?
A - SMOKE light comes on + Continuous
Repetitive Chime + MASTER WARNING + ECAM
message.
B - The CIDS duplicates the cargo smoke
warning to the cabin.
C - lights come on.
What happens if the SDCU is faulty?
A - The lavatory smoke detection is
inoperative.
B - The cargo smoke detection is inoperative
C - Both A and B, with Single Chime + MASTER
CAUT + ECAM message.
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EFFECTIVITY 26-16-00 Page 5
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THIS PAGE INTENTIONALLY LEFT BLANK
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26 - FIRE PROTECTION
26-16-00 CARGO AND LAVATORY FIRE
PROTECTION - CARGO SMOKE
DETECTION WARNING
CONTENTS:
Cargo Smoke Detection
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CARGO SMOKE DETECTION WARNING
CARGO SMOKE DETECTION
When cargo smoke is detected, the SMOKE light comes
on on the CARGO SMOKE panel and the ISOLation VALVE
FAULT light on the CARGO HEAT panel comes on. The
　
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