W DOC AIRBUS | AMM A320F

Installation of the FIRE Pushbutton Switch (ENG/APU Fire Panel)

TASK 26-12-12-400-004-A
Installation of the FIRE Pushbutton Switch (ENG/APU Fire Panel)

FIN: 1WD
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 0.68 and 0.49 m.daN (60.18 and 43.36 lbf.in ) T
 B. Referenced Information
REFERENCE
DESIGNATION
TASK 24-42-00-861-001-A
Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A
De-energize the Ground Service Network Supplied from the External Power
TASK 26-12-00-710-001-A
Operational Check of Loop/Squib
TASK 26-21-00-720-005-A
Functional Test of the ENG 1(2) FIRE Pushbutton Switch
TASK 26-22-00-710-001-A
Operational Test of the APU Fire-Extinguishing Loop/Squib
TASK 26-22-00-710-004-A
Operational Check Of Automatic Fire Extinguishing Circuit And Test LP Fuel-Valve Operation using Each Individual Motor In Turn And Test APU
F Illustration of FIRE Pushbutton Switch - Installation
3. Job Set-up
Subtask 26-12-12-860-053-A
A. Safety Precautions
   (1) In the cockpit:
     (a) On the ENG panel 115VU, make sure that the WARNING NOTICE(S) is in position to tell persons not to start the engines.
     (b) On the OVERHEAD CTL & IND panel 25VU, make sure that the WARNING NOTICE(S) is in position to tell persons not to start the APU.
Subtask 26-12-12-861-052-A
B. Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
Subtask 26-12-12-865-059-A
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/FLOW/CTL &/IND11HBD07
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 1/CTL3HA1D12
49VUAIR BLEED/ENG 1/MONG2HA1D11
** ON A/C ALL
49VUFUEL/LP VALVE/MOT1/ENG22QGA09
49VUFUEL/LP VALVE/MOT1/ENG11QGA08
49VUENGINE/2/FIRE DET/LOOP B8WD2A07
49VUENGINE/1/FIRE DET/LOOP A7WD1A06
49VUHYD/FIRE VALVE/Y/ENG23702GDC14
49VUHYD/FIRE VALVE/G/ENG11703GKC13
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 2/MONG3HA2D12
49VUAIR BLEED/ENG 1/CTL2HA1D11
49VUHYDRAULIC/FIRE VALVE/G/ALTN1711GKH14
49VUHYDRAULIC/FIRE VALVE/Y/ALTN3712GDH13
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B2WE1Q44
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B2WE2Q42
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A1WE1Q43
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A1WE2Q41
** ON A/C ALL
121VUAPU/FIRE AND OVHT/DET/LOOP B2WGL44
121VUAPU/FIRE AND OVHT/DET/LOOP A1WGL43
121VUAPU/FIRE/EXTIG/SQUIB/B2WFL39
121VUAPU/FIRE/EXTIG/SQUIB/A1WFL38
121VUAPU/FIRE/LP VALVE/NORM4WFM42
121VUAPU/FIRE/LP VALVE/STBY3WFM41
121VUFUEL/LP VALVE/MOT2/ENG24QGM26
121VUFUEL/LP VALVE/MOT2/ENG13QGM25
121VUENGINE/ENG2/FIRE DET/LOOP A7WD2Q39
121VUENGINE/ENG1/FIRE DET/LOOP B8WD1Q38
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B2WE1Q44
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B2WE2Q42
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B2WE1Q43
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A1WE1Q42
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B2WE2Q41
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A1WE2Q40
** ON A/C NOT FOR ALL
122VUAPU GEN/EGIU2/28VDC26XU2Y31
122VUGEN2/EGIU2/28VDC24XU2Y30
122VUELEC/EXT PWR/EGIU1/28VDC26XU1Z31
122VUELEC/GEN1/EGIU1/28VDC24XU1Z30
** ON A/C NOT FOR ALL
122VUAIR COND/FLOW/CTL AND IND/22HBV21
** ON A/C NOT FOR ALL
122VUAIR BLEED/ENG 2/CTL3HA2Z23
122VUAIR BLEED/ENG 2/MONG2HA2Z22
** ON A/C ALL
122VUELEC/GCU/22XU2T27
122VUELEC/GCU/12XU1T26
** ON A/C NOT FOR ALL
122VUAIR BLEED/ENG 1/MONG3HA1Z23
122VUAIR BLEED/ENG 2/CTL2HA2Z22
** ON A/C NOT FOR ALL
123VUGEN1/EGIU1/115VAC23XU1AF12
123VUGEN2/EGIU2/115VAC23XU2AF01
4. Procedure
Subtask 26-12-12-420-053-A ** ON A/C NOT FOR ALL
A. Installation of the FIRE Pushbutton Switch
   (1) Put in position the pushbutton switch (2) in the ENG/APU Fire panel (1).
   (2) Push the pushbutton switch (2) to connect the electrical connector.
   (3) Install the screws (3) and tighten them to between 0.68 and 0.49 m.daN (60.18 and 43.36 lbf.in ) T.
   (4) Make sure that the 3 safety guards (4) of the pushbutton switches (2) are open.
   (5) Install the lighted plate (5) on the ENG/FIRE panel (1).
   (6) Install the screws (6) and tighten them.
   (7) Close the 3 safety guards (4).
Subtask 26-12-12-865-060-A
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/FLOW/CTL &/IND11HBD07
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 1/CTL3HA1D12
49VUAIR BLEED/ENG 1/MONG2HA1D11
** ON A/C ALL
49VUFUEL/LP VALVE/MOT1/ENG22QGA09
49VUFUEL/LP VALVE/MOT1/ENG11QGA08
49VUENGINE/2/FIRE DET/LOOP B8WD2A07
49VUENGINE/1/FIRE DET/LOOP A7WD1A06
49VUHYD/FIRE VALVE/Y/ENG23702GDC14
49VUHYD/FIRE VALVE/G/ENG11703GKC13
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 2/MONG3HA2D12
49VUAIR BLEED/ENG 1/CTL2HA1D11
49VUHYDRAULIC/FIRE VALVE/G/ALTN1711GKH14
49VUHYDRAULIC/FIRE VALVE/Y/ALTN3712GDH13
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B2WE1Q44
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B2WE2Q42
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A1WE1Q43
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A1WE2Q41
** ON A/C ALL
121VUAPU/FIRE AND OVHT/DET/LOOP B2WGL44
121VUAPU/FIRE AND OVHT/DET/LOOP A1WGL43
121VUAPU/FIRE/EXTIG/SQUIB/B2WFL39
121VUAPU/FIRE/EXTIG/SQUIB/A1WFL38
121VUAPU/FIRE/LP VALVE/NORM4WFM42
121VUAPU/FIRE/LP VALVE/STBY3WFM41
121VUFUEL/LP VALVE/MOT2/ENG24QGM26
121VUFUEL/LP VALVE/MOT2/ENG13QGM25
121VUENGINE/ENG2/FIRE DET/LOOP A7WD2Q39
121VUENGINE/ENG1/FIRE DET/LOOP B8WD1Q38
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B2WE1Q44
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B2WE2Q42
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B2WE1Q43
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A1WE1Q42
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B2WE2Q41
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A1WE2Q40
** ON A/C NOT FOR ALL
122VUAPU GEN/EGIU2/28VDC26XU2Y31
122VUGEN2/EGIU2/28VDC24XU2Y30
122VUELEC/EXT PWR/EGIU1/28VDC26XU1Z31
122VUELEC/GEN1/EGIU1/28VDC24XU1Z30
** ON A/C NOT FOR ALL
122VUAIR COND/FLOW/CTL AND IND/22HBV21
** ON A/C NOT FOR ALL
122VUAIR BLEED/ENG 2/CTL3HA2Z23
122VUAIR BLEED/ENG 2/MONG2HA2Z22
** ON A/C ALL
122VUELEC/GCU/22XU2T27
122VUELEC/GCU/12XU1T26
** ON A/C NOT FOR ALL
122VUAIR BLEED/ENG 1/MONG3HA1Z23
122VUAIR BLEED/ENG 2/CTL2HA2Z22
** ON A/C NOT FOR ALL
123VUGEN1/EGIU1/115VAC23XU1AF12
123VUGEN2/EGIU2/115VAC23XU2AF01
Subtask 26-12-12-720-054-A
C. Do this Functional Test:
   (1) Reset of the FIRE pushbutton switch:
CAUTION: TO RESET THE ENG 1(2) APU FIRE PUSHBUTTON SWITCH:
  • PUSH THE PUSHBUTTON SWITCH FULLY IN (LATCHED POSITION).
THEN CLOSE THE GUARD. DO NOT TRY TO CLOSE THE GUARD AND PUSH THE PUSHBUTTON SWITCH AT THE SAME TIME.
     (a) Open the safety guard of the FIRE pushbutton switch.
     (b) Push and release the FIRE pushbutton switch.
     (c) Push the FIRE pushbutton switch.
     (d) Close the safety guard of the FIRE pushbutton switch.
   (2) Do a functional test of the ENG 1(2) FIRE pushbutton switch (Ref. AMM TASK 26-21-00-720-005).
Subtask 26-12-12-710-053-A
D. Do this Operational Test:
   (1) For the APU:
     (a) Do an operational test of the functions of the APU FIRE pushbutton-switch (Ref. AMM TASK 26-22-00-710-004).
     (b) Do an operational test of the APU fire-extinguishing system (Ref. AMM TASK 26-22-00-710-001).
   (2) For the engine:
     (a) Do an operational test of the engine fire and overheat detection system (Ref. AMM TASK 26-12-00-710-001).
5. Close-up
Subtask 26-12-12-862-051-A
A. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
Subtask 26-12-12-410-051-A
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.03.31 23:42:30 UTC
"Aviabrain" 2025