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MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 8
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SELF EXAMINATION
Is the extinguishing system controlled by the FDU?
A - Yes.
B - No.
Where are the fire detectors located?
A - On the fan and the turbine.
B - On the pylon, the fan and the core.
C - On the core and the gearbox
The AGENT pushbutton is active when:
A - The corresponding "DISCH" light
illuminates.
B - ENGINE FIRE PUSHbutton illuminates.
C - ENGINE FIRE PUSHbutton is released out
What does the TEST pushbutton check?
A - Only the fire detection loops A and B,
FDU, indications and warnings.
B - Only the squib circuit continuity of
AGENT 1 and 2.
C - Both simultaneously.
TMUFIRA06 LEVEL 1
EFFECTIVITY 26-12-00 Page 5
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THIS PAGE INTENTIONALLY LEFT BLANK
TMUFIRA06 LEVEL 1
EFFECTIVITY 26-12-00 Page 6
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
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26 - FIRE PROTECTION
26-12-00 ENGINE FIRE PROTECTION: FIRE
DETECTION LOGIC
CONTENTS:
General
Fire Warning
Loop Fault Warning
Detection Fault Warning
TMUFIAA01 LEVEL 3
EFFECTIVITY 26-12-00 Page 1
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
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ENGINE FIRE PROTECTION: FIRE DETECTION LOGIC
GENERAL
The engine Fire Detection Unit (FDU) has two channels
capable of detecting any case of engine fire and loop
failure. Each channel performs the same detection logic
depending on the loop A and loop B status.
FIRE WARNING
In case of a fire detected on both loops or on one
loop with the other faulty, the channels provide a
fire warning to the ENGINE FIRE panel, ENGINE START
control panel and ECAM displays.
The fire Detection Unit (FDU) generates a fire warning
signal if any of the following conditions are met:
- Fire on loop A and fire on loop B
- Fire on loop A and fault on loop B
- Fault on loop A and fire on loop B
- Fault on loop A and fault on loop B within
5 seconds (both loops broken due to a
torching flame).
TMUFIAA01-T01 LEVEL 3
EFFECTIVITY 26-12-00 Page 2
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ENGINE FIRE PROTECTION: FIRE DETECTION LOGIC - FIRE WARNING
TMUFIAA01-P01 LEVEL 3
EFFECTIVITY 26-12-00 Page 3
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ENGINE FIRE PROTECTION: FIRE DETECTION LOGIC
LOOP FAULT WARNING
In case of a loop failure the Fire Detection Unit
provides a loop fault warning signal to the ECAM and
Centralized Fault Interface Unit (CFDIU).
The Fire Detection Unit (FDU) generates an inoperative
signal if any of the following conditions are met:
- Electrical failure
- Integrity failure
- Detection of a single loop FIRE during more
than 16s while the other loop is in normal
condition.
TMUFIAA01-T02 LEVEL 3
EFFECTIVITY 26-12-00 Page 4
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ENGINE FIRE PROTECTION: FIRE DETECTION LOGIC - LOOP FAULT WARNING
TMUFIAA01-P02 LEVEL 3
EFFECTIVITY 26-12-00 Page 5
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ENGINE FIRE PROTECTION: FIRE DETECTION LOGIC
DETECTION FAULT WARNING
The detection fault logic is based on a dual loop
failure. It corresponds to a total loss of the
detection system.
When the Fire Detection Unit generates two inoperative
signals corresponding to loop A and loop B fault logic,
the Flight Warning Computer (FWC) elaborates the fault
warning.
TMUFIAA01-T03 LEVEL 3
EFFECTIVITY 26-12-00 Page 6
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
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