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TMUFIRJ08 LEVEL 3
EFFECTIVITY 26-12-00 Page 3
Jul 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 39
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FIRE DETECTION UNIT (FDU)
IDENTIFICATION
FIN: 2WD1, 2WD2
LOCATION
ZONE: 126
FIRE BOTTLES
IDENTIFICATION
FIN: 6WE2, 8WE2
LOCATION
ZONE: 425
COMPONENT DESCRIPTION
- Two per engine.
- type of agent: bromotrifluoromethane.
- Nominal Nitrogen pressure: at 21 deg.C, 600 psi.
PRESSURE SWITCH
The pressure switch is calibrated at:
- 450 psi when the pressure increases (refilling).
- 225/275 psi when the pressure decreases (discharge
or leak).
A spring loaded finger permits the electrical
continuity of the pressure switch to be manually
checked.
DISCHARGE HEAD
The discharge head has a leakproof metallic diaphragm.
The rupture of the leakproof metallic diaphragm, is
caused by:
- Gas pressure released after cartridge firing.
- An excessive pressure (between 1600 to 1800 psi at
95 deg.C, 203 deg.F), in the extinguisher bottle, in
case of overheat condition in the engine pylon. The
full quantity of the agent is released into the
nacelle.
SQUIB
The squib is an electro pyrotechnic cartridge
containing explosive powder, fired by two filaments
supplied with 28 VDC.
WARNING: Never check the continuity of the squib using
a conventional ohmmeter.
TMUFIRJ08-T02 LEVEL 3
EFFECTIVITY 26-12-00 Page 4
Jul 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 40
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ENGINE FIRE PROTECTION COMPONENTS - FIRE DETECTION UNIT (FDU) - FIRE BOTTLES
TMUFIRJ08-P02 LEVEL 3
EFFECTIVITY 26-12-00 Page 5
Jul 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 41
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ENGINE FIRE PROTECTION COMPONENTS
FIRE DETECTORS
COMPONENT DESCRIPTION
The detector is pneumatically operated by heating its
sensing element which contains helium gas and an
hydrogen charged core material.
Alarm State
The application of heat to the sensor causes an
increase of the gas pressure which in turn closes the
alarm switch. The detector sends a FIRE signal.
Fault State
In the event of gas pressure loss, the integrity switch
opens and generates a fault signal.
PYLON FIRE DETECTORS
IDENTIFICATION
FIN: 3WD2, 4WD2
LOCATION
ZONE: 425
CORE FIRE DETECTORS
IDENTIFICATION
FIN: 4001WD1, 4001WD2
LOCATION
ZONE: 463
FAN FIRE DETECTORS
IDENTIFICATION
FIN: 4000WD1, 4000WD2
LOCATION
ZONE: 445
TMUFIRJ08-T03 LEVEL 3
EFFECTIVITY 26-12-00 Page 6
Jul 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 42
ALL
ENGINE FIRE PROTECTION COMPONENTS - FIRE DETECTORS
TMUFIRJ08-P03 LEVEL 3
EFFECTIVITY 26-12-00 Page 7
Jul 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 43
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THIS PAGE INTENTIONALLY LEFT BLANK
TMUFIRJ08 LEVEL 3
EFFECTIVITY 26-12-00 Page 8
Jul 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 44
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26 - FIRE PROTECTION
26-12-00 ENGINE FIRE PROTECTION:
ELECTRICAL CIRCUITS
CONTENTS:
Detection
Extinguishing
Interfaces
TMUFIRQ01 LEVEL 3
EFFECTIVITY 26-12-00 Page 1
May 31/94
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 45
ALL
TMUFIRQ01-P01 LEVEL 3
ENGINE FIRE PROTECTION: ELECTRICAL CIRCUITS - DETECTION
EFFECTIVITY 26-12-00 Page 2
May 31/94
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 46
ALL
TMUFIRQ01-P02 LEVEL 3
ENGINE FIRE PROTECTION: ELECTRICAL CIRCUITS - EXTINGUISHING
EFFECTIVITY 26-12-00 Page 3
May 31/94
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 47
ALL
TMUFIRQ01-P03 LEVEL 3
ENGINE FIRE PROTECTION: ELECTRICAL CIRCUITS - TEST
　
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