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Aug 31/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 56
ALL
SELF EXANIMATION
How is an APU fire on ground normally extinguished?
A - From APU FIRE panel.
B - Automatically.
C - From EXTERNAL POWER panel.
How can a thermal discharge of the bottle be
detected on a cold aircraft?
A - By the FDU.
B - By the ECAM.
C - By the red disc indicator.
How many fire detectors does the APU fire detection
system comprise?
A - Three.
B - Two.
C - One.
TMUFIRB02 LEVEL 1
EFFECTIVITY 26-13-00 Page 5
Aug 31/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 57
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THIS PAGE INTENTIONALLY LEFT BLANK
TMUFIRB02 LEVEL 1
EFFECTIVITY 26-13-00 Page 6
Aug 31/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 58
ALL
26 - FIRE PROTECTION:
26-12-00 APU FIRE PROTECTION: FIRE
DETECTION LOGIC
CONTENTS:
General
Fire Warning
Loop Fault Warning
Detection Fault Warning
TMUFIAB01 LEVEL 3
EFFECTIVITY 26-12-00 Page 1
Aug 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 59
ALL
APU FIRE PROTECTION: FIRE DETECTION LOGIC
GENERAL
The APU Fire Detection Unit (FDU) has two channels
capable of detecting any case of APU 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 APU FIRE panel, EXTERNAL POWER
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).
TMUFIAB01-T01 LEVEL 3
EFFECTIVITY 26-12-00 Page 2
Aug 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 60
ALL
APU FIRE PROTECTION: FIRE DETECTION LOGIC - FIRE WARNING
TMUFIAB01-P01 LEVEL 3
EFFECTIVITY 26-12-00 Page 3
Aug 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 61
ALL
APU 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 Display 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.
An electrical failure is signaled by a loop fault
message if there is a loss of electrical power of the
APU fire detection system.
An integrity failure is signaled by a loop fault
message if there is a loss of pressure in a Fire Sensor
Element.
TMUFIAB01-T02 LEVEL 3
EFFECTIVITY 26-12-00 Page 4
Aug 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 62
ALL
APU FIRE PROTECTION: FIRE DETECTION LOGIC - LOOP FAULT WARNING
TMUFIAB01-P02 LEVEL 3
EFFECTIVITY 26-12-00 Page 5
Aug 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
UF94200
EFFECTIVITY Page 63
ALL
APU 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 a
detection fault warning.
TMUFIAB01-T03 LEVEL 3
EFFECTIVITY 26-12-00 Page 6
Aug 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 26 FIRE PROTECTION
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