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IDENTIFICATION
FIN: 1WQ,
4WQ,
5WQ
LOCATIONS
FWD LAVATORY A, ZONE 221,
AFT LAVATORY D, ZONE 261,
AFT LAVATORY E, ZONE 261
COMPONENT DESCRIPTION
The smoke detector operates on the principle of reverse
scattered light.
SMOKE DETECTOR
The light source, the labyrinth and the photocell are
arranged in a horizontal plane so that the photocell
cannot receive light.
But when there is smoke, the smoke particles reflect
and diffuse part of the light beam.
The photocell receives this light and gives an analog
signal and triggers the alarms.
TMUFIRX03-T02 LEVEL 3
EFFECTIVITY 26-16-00 Page 4
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 168
ALL
CARGO AND LAVATORY FIRE PROTECTION - COMPONENTS - LAVATORY SMOKE DETECTORS
TMUFIRX03-P02 LEVEL 3
EFFECTIVITY 26-16-00 Page 5
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 169
ALL
CARGO AND LAVATORY FIRE PROTECTION - COMPONENTS
CARGO SMOKE DETECTORS
IDENTIFICATION
FIN: 1WH, 2WH,
3WH, 4WH,
5WH, 6WH
LOCATIONS
FWD CARGO COMPARTMENT, ZONE 132,
AFT CARGO COMPARTMENT, ZONE 151,
BULK CARGO COMPARTMENT, ZONE 161
COMPONENT DESCRIPTION
Refer to lavatory smoke detection components.
Note that the cargo smoke detection system is optional
and independent for each compartment.
TMUFIRX03-T03 LEVEL 3
EFFECTIVITY 26-16-00 Page 6
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 170
ALL
CARGO AND LAVATORY FIRE PROTECTION - COMPONENTS - CARGO SMOKE DETECTORS
TMUFIRX03-P03 LEVEL 3
EFFECTIVITY 26-16-00 Page 7
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 171
ALL
CARGO AND LAVATORY FIRE PROTECTION - COMPONENTS
SMOKE DETECTION CONTROL UNIT (SDCU)
IDENTIFICATION
FIN: 10WQ
LOCATION
ZONE: 122, RACK 94VU
COMPONENT DESCRIPTION
The SDCU has two channels, which make it a fail-safe
unit. The system will operate normally if one channel
fails. The Built In Test Equipment (BITE) detects and
isolates failures in the SCDU. It also makes sure that
the smoke detectors operate correctly. Most of the
system functions are monitored continuously.
TMUFIRX03-T04 LEVEL 3
EFFECTIVITY 26-16-00 Page 8
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 172
ALL
CARGO AND LAVATORY FIRE PROTECTION - COMPONENTS - SMOKE DETECTION CONTROL UNIT (SDCU)
TMUFIRX03-P04 LEVEL 3
EFFECTIVITY 26-16-00 Page 9
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 173
ALL
CARGO AND LAVATORY FIRE PROTECTION - COMPONENTS
CARGO FIRE BOTTLE (26-23-00)
IDENTIFICATION
FIN: 4005WX
LOCATION
FWD CARGO COMPARTMENT, ZONE 132
COMPONENT DESCRIPTION
The fire extinguisher bottle is made of stainless steel
and is hermetically sealed. Fully charged, it weighs
15,65 kg. The bottle has two discharge outlets.
The extinguishing agent used is halon 1301, which is
nontoxic.
Each bottle has a pressure switch and a fill and safety
relief port:
- The pressure switch sends a signal to the SDCU
if there is not sufficient pressure in the
bottle (if the bottle is discharged or if a
leak occurs).
EXTINGUISHING NOZZLES
IDENTIFICATION
The cargo fire bottle has no FIN
LOCATION
ZONE : 132, 151, 161
COMPONENT DESCRIPTION
The fire extinguishing bottle is connected to the
extinguishing nozzles through pipes. One fire
extinguisher pipe connects the bottle with the two FWD
discharge nozzles and one pipe with the three nozzles
in the AFT cargo compartment. The nozzles are installed
in the cargo compartment smoke detector cavities.
Note that the cargo fire extinguishing system is
optional, independent for each compartment and
requires the smoke detection system.
TMUFIRX03-T05 LEVEL 3
EFFECTIVITY 26-16-00 Page 10
Aug 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 174
　
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