W DOC AIRBUS | AMM A320F

Removal of the Core Fire Detectors

TASK 26-12-17-000-010-A
Removal of the Core Fire Detectors

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
FIN: 4001WD1 ** ON A/C NOT FOR ALL
FIN: 4001WD2 ** ON A/C NOT FOR ALL
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
AR
CAP - BLANKING
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 24-41-00-861-002-A
Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01
Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02
Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 71-13-00-010-010-A
Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A
Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-32-00-010-010-A
Opening of the Thrust Reverser Halves
F Core Fire Detectors
3. Job Set-up
Subtask 26-12-17-861-052-A ** ON A/C NOT FOR ALL
A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 26-12-17-941-051-A ** ON A/C NOT FOR ALL
B. Safety Precautions
   (1) On the center pedestal, on the ENG panel 115VU:
     (a) Make sure that the ENG/MODE/CRANK/NORM/IGN/START selector switch is in the NORM position.
     (b) Put a WARNING NOTICE(S) to tell persons not to start the engine.
   (2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
   (3) On the overhead maintenance panel 50VU:
     (a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 26-12-17-865-087-A ** ON A/C NOT FOR ALL
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VUENGINE/1/FIRE DET/LOOP A7WD1A06
121VUENGINE/ENG1/FIRE DET/LOOP B8WD1Q38
FOR FIN: 1000EM2 (ENGINE2)
49VUENGINE/2/FIRE DET/LOOP B8WD2A07
121VUENGINE/ENG2/FIRE DET/LOOP A7WD2Q39
Subtask 26-12-17-010-053-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in to position.
Subtask 26-12-17-040-054-A ** ON A/C NOT FOR ALL
E. Deactivate the Thrust Reverser
WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
   (1) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).
Subtask 26-12-17-010-057-A ** ON A/C NOT FOR ALL
F. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
   (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
   (2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
4. Procedure
Subtask 26-12-17-020-051-A ** ON A/C NOT FOR ALL
A. Removal of the Core Fire Detectors
PRE SBN 26-0004
PRE SBN 71-0145
PRE SBE 79-0088
   (1) Disconnect the electrical connectors 4001WD1-A and 4001WD2-A
F Core Fire Detectors ** ON A/C NOT FOR ALL
     (a) Disconnect the electrical connectors (9) and (10) from the responders (11).
     (b) Put CAP - BLANKING on the disconnected electrical connectors and the electrical receptacles.
   (2) Remove the fire detector assembly
F Core Fire Detectors ** ON A/C NOT FOR ALL
     (a) Remove the nuts (36), the washers (39) and the bolts (38) from the three clips (37) at position F.
     (b) Remove the nut (32), the washer (35) and the bolt (34) from the clip (33) at position E.
     (c) Remove the nut (21), the washer (22) and the bolt (23) from the clip (24) at position C.
     (d) Disconnect the clip at position D
       1 Make a note of the position of the nut (28), the washer (29), the spacer (26), the bolt (25) and the clip (27).
       2 Remove the nut (28), the washer (29), the spacer (26) and the bolt (25).
     (e) Remove the nuts (6), the washers (7) and the bolts (8) from the responder supports at position G.
     (f) Remove the support tube (13) with the elements (12) attached.
     (g) Remove the clips (24), (27), (33) and (37) from the support tube (13).
Subtask 26-12-17-020-053-A ** ON A/C NOT FOR ALL
B. Removal of the Core Fire Detectors
PRE SBN 26-0004
PRE SBE 79-0088
SBN 71-0145
   (1) Disconnect the electrical connectors 4001WD1-A and 4001WD2-A
F Core Fire Detectors ** ON A/C NOT FOR ALL
     (a) Disconnect the electrical connectors from the responders.
     (b) Put CAP - BLANKING on the disconnected electrical connectors and the electrical receptacles.
   (2) Remove the fire detector assembly
F Core Fire Detectors ** ON A/C NOT FOR ALL
     (a) Remove the nuts (36), the washers (39) and the bolts (38) from the three clips (37) at position F.
     (b) Remove the nut (32), the washer (35) and the bolt (34) from the clip (33) at position E.
     (c) Disconnect the clip at position D.
       1 Make a note of the position of the nut (28), the washer (29), the clip (27), the spacer (26) and the bolt (25).
       2 Remove the nut (28), the washer (29), the spacer (26) and the bolt (25).
     (d) Remove the nuts (6), the washers (7) and the bolts (8) that attach the responder supports to the bracket (14) at position G.
     (e) Remove the support tube (13) with the elements (12) attached.
     (f) Remove the clips (27), (33) and (37) from the support tube (13).
Subtask 26-12-17-020-054-A ** ON A/C NOT FOR ALL
C. Removal of the Core Fire Detectors
SBN 26-0004
SBN 71-0145
PRE SBE 79-0088
   (1) Disconnect the electrical connectors 4001WD1-A and 4001WD2-A
F Core Fire Detectors ** ON A/C NOT FOR ALL
     (a) Disconnect the electrical connectors from the responders.
     (b) Put CAP - BLANKING on the disconnected electrical connectors and the electrical receptacles.
   (2) Remove the fire detector assembly
F Core Fire Detectors ** ON A/C NOT FOR ALL
     (a) Remove the nuts (36), the washers (39) and the bolts (38) from the three clips (37) at position F.
     (b) Remove the nut (32), the washer (35) and the bolt (34) from the clip (33) at position E.
     (c) Disconnect the clip at position D.
       1 Make a note of the position of the nut (28), the washer (29), the clip (27), the spacers (26) and (30), the P-clip (31) and the bolt (25).
       2 Remove the nut (28), the washer (29), the spacers (26) and (30) and the bolt (25).
     (d) Remove the nuts (6), the washers (7) and the bolts (8) that attach the responder supports to the bracket (14) at position G.
     (e) Remove the support tube (13) with the elements (12) attached.
     (f) Remove the clips (27), (33) and (37) from the support tube (13).
Subtask 26-12-17-020-055-A ** ON A/C NOT FOR ALL
D. Removal of the Core Fire Detectors
SBN 26-0004
SBN 71-0145
SBE 79-0088
   (1) Disconnect the electrical connectors 4001WD1-A and 4001WD2-A
F Core Fire Detectors ** ON A/C NOT FOR ALL
     (a) Disconnect the electrical connectors from the responders.
     (b) Put CAP - BLANKING on the disconnected electrical connectors and the electrical receptacles.
   (2) Remove the fire detector assembly
F Core Fire Detectors ** ON A/C NOT FOR ALL
     (a) Remove the nuts (36), the washers (39) and the bolts (38) from the three clips (37) at position F.
     (b) Remove the nut (32), the washer (35) and the bolt (34) from the clip (33) at position E.
     (c) Remove the nut (28), the washer (29) and the bolt (25) from the clip (27) at position D.
     (d) Pre SBN 71-0295
Remove the nuts (6), the washers (7), the bolts (8) and the washers (15) that attach the responder support tube to the fire detection bracket (14) at position G.
SBN 71-0295
Remove the nuts (6), the washers (7), and the bolts (8) that attach the responder support tube to the fire detection bracket (14) at position G.
     (e) Remove the support tube (13) with the elements (12) attached.
     (f) Remove the clips (27), (33) and (37) from the support tube (13).
Subtask 26-12-17-020-060-A ** ON A/C NOT FOR ALL
E. Removal of the Core Fire Detector Elements
F Core Fire Detectors ** ON A/C NOT FOR ALL
   (1) Remove the screws (40), the nuts (42) and the washers (41) that attach the responder clamps (43) and bracket (47) to the support tube (13).
   (2) Loosen all the sensor clamps (44) and remove the clamp tops and the screws.
NOTE: Keep the clamp tops and the screws.
   (3) Remove the liners (45) and (46).
   (4) Remove the sensor elements (12) from the support tube (13).
[Rev.10 from 2021] 2026.03.31 23:43:07 UTC
"Aviabrain" 2025