W DOC AIRBUS | AMM A320F

Installation of the Fan Area Fire-Detection Elements

TASK 26-12-18-400-801-A
Installation of the Fan Area Fire-Detection Elements

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.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 430
ZONE: 440
FIN: 4000WD1
FIN: 4000WD2
FIN: 4002WD1
FIN: 4002WD2
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
WARNING NOTICE(S)
No specific
Torque wrench: range to between 45 and 40 lbf.in (0.51 and 0.45 m.daN ) T
No specific
Torque wrench: range to between 55 and 50 lbf.in (0.62 and 0.57 m.daN ) T
No specific
Torque wrench: range to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CP2442)
engine oil
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
430
ENG 1 AIR INTAKE, FAN AND ACCESS GEARBOX
440
ENG 2 AIR INTAKE, FAN AND ACCESS GEARBOX
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR
 D. 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 31-60-00-860-001-A
EIS Start Procedure
TASK 31-60-00-860-002-A
EIS Stop Procedure
TASK 71-13-00-010-803-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A
Closing of the Fan Cowl Doors
F Fan Area Fire-Detection Elements
3. Job Set-up
Subtask 26-12-18-861-051-A
A. Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
Subtask 26-12-18-941-051-A
B. Safety Precautions
   (1) On the center pedestal, on ENG panel 115VU:
     (a) Make sure that the ENG/MODE selector switch is in the NORM position.
     (b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
     (c) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:
  • The ENG/MODE selector switch, and
  • The ENG/MASTER 1(2) control switch.
   (2) On the ENG section of maintenance panel 50VU:
     (a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
Subtask 26-12-18-865-051-A
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
49VUENGINE/1/FIRE DET/LOOP A7WD1A06
121VUENGINE/ENG1/FIRE DET/LOOP B8WD1Q38
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
49VUENGINE/2/FIRE DET/LOOP B8WD2A07
121VUENGINE/ENG2/FIRE DET/LOOP A7WD2Q39
Subtask 26-12-18-010-051-A
D. Get Access
   (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
   (2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
4. Procedure
Subtask 26-12-18-420-050-A
A. Installation of the Fan Area Fire-Detection Elements
F Fan Area Fire-Detection Elements
   (1) Removal of protection covers
CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
     (a) Remove all the COVER - PROTECTION and CAP - PROTECTION from the openings, tubes, hoses and connectors.
   (2) Install the 6 o'clock fire detection elements as follows:
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
     (a) Lubricate the threads of the bolts that follow with engine oil (Material No.CP2442) :
  • The four bolts (39) and the four bolts (67)
  • The nuts (36) and (37) and the nuts (64) and (65).
     (b) Do a visual check of the fire detection component interfaces and/or adjacent area.
     (c) Make sure that the plastic jaws and the responder brackets removed and retained during the fire-detection element removal are clean and in the serviceable condition.
     (d) Put the responder bracket (38) with the responder (40) in position on the support bracket of the fire detection support rail.
     (e) Install the four bolts (39) to attach the responder (40) on the left side of the engine.
     (f) TORQUE the four bolts (39) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in ) T.
     (g) Align the fire detection elements (69) and (67) along the route identified by the 11 clips.
     (h) One clip at a time, align the fire detection elements (69) and (70) in the grooves of the clip. Install the plastic jaws. Close the clips and turn the fasteners one-half turn to lock the clips as follows:
       1 Turn the fastener (42) to lock the clip (41).
       2 Turn the fastener (44) to lock the clip (43).
       3 Turn the fastener (46) to lock the clip (45).
       4 Turn the fastener (48) to lock the clip (47).
       5 Turn the fastener (50) to lock the clip (49).
       6 Turn the fastener (52) to lock the clip (51).
       7 Turn the fastener (54) to lock the clip (53).
       8 Turn the fastener (56) to lock the clip (55).
       9 Turn the fastener (58) to lock the clip (57).
       10 Turn the fastener (60) to lock the clip (59).
       11 Turn the fastener (62) to lock the clip (61).
     (i) Put the responder bracket (66) with the responder (68) in position on the support bracket of the fire-detection support rail.
     (j) Install the four bolts (67) to attach the responder (68) on the right side of the engine.
     (k) TORQUE the four bolts (67) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in ) T.
     (l) Install the nuts (36) and (37) to attach the right harness (35) connectors to the responder (40).
     (m) TORQUE the nut (37) to between 45 and 40 lbf.in (0.51 and 0.45 m.daN ) T.
     (n) TORQUE the nut (36) to between 55 and 50 lbf.in (0.62 and 0.57 m.daN ) T.
     (o) Install the nuts (64) and (65) to attach the left harness (63) connectors to the responder (68).
     (p) TORQUE the nut (65) to between 45 and 40 lbf.in (0.51 and 0.45 m.daN ) T.
     (q) TORQUE the nut (64) to between 55 and 50 lbf.in (0.62 and 0.57 m.daN ) T.
     (r) Engage the plastic jaws (with the harness leads engaged in them) into the spring clips on the responder support brackets (38) and (66).
     (s) Make sure that the clearance between the fire detection elements and the support tube is a minimum of 7 mm (0.28 in.) between:
  • The clips (41) and (43)
  • The clips (47) and (49)
  • The clips (53) and (55)
  • The clips (59) and (61).
   (3) Install the fire detection elements to the Accessory Gearbox (AGB) as follows:
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
     (a) Lubricate the threads of the bolts that follow with engine oil (Material No.CP2442) :
  • The four bolts (5) and the four bolts (31)
  • The nuts (2) and (3) and the nuts (28) and (29).
     (b) Do a visual check of the fire-detection component interfaces and/or adjacent area.
     (c) Make sure that the plastic jaws and responder brackets removed and retained during the fire-detection element removal are clean and in the serviceable condition.
     (d) Put the responder bracket (4) with the responder (6) in position on the support bracket of the AGB.
     (e) Install the four bolts (5) to attach the upper responder (6) to the AGB bracket.
     (f) TORQUE the four bolts (5) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in ) T.
     (g) Align the fire detection elements (33) and (34) along the route identified by the ten clips.
     (h) One clip at a time, open the clip and align the fire detection elements (33) and (34) in the grooves of the clip. Install the plastic jaws. Close the clips and turn the fasteners one-half turn to lock the clips closed as follows:
       1 Turn the fastener (8) to lock the clip (7).
       2 Turn the fastener (10) to lock the clip (9).
       3 Turn the fastener (12) to lock the clip (11).
       4 Turn the fastener (14) to lock the clip (13).
       5 Turn the fastener (16) to lock the clip (15).
       6 Turn the fastener (18) to lock the clip (17).
       7 Turn the fastener (20) to lock the clip (19).
       8 Turn the fastener (22) to lock the clip (21).
       9 Turn the fastener (24) to lock the clip (23).
       10 Turn the fastener (26) to lock the clip (25).
     (i) Put the responder bracket (30) with the responder (32) in position on the support bracket of the AGB.
     (j) Install the four bolts (31) to attach the lower responder (32) to the AGB bracket.
     (k) TORQUE the four bolts (31) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in ) T.
     (l) Install the nuts (2) and (3) to attach the harness (1) connectors to the responder (29).
     (m) TORQUE the nuts (2) to between 45 and 40 lbf.in (0.51 and 0.45 m.daN ) T.
     (n) TORQUE the nuts (3) to between 55 and 50 lbf.in (0.62 and 0.57 m.daN ) T.
     (o) Install the nuts (28) and (29) to attach the harness (27) connectors to the responder (2).
     (p) TORQUE the nut (29) to between 45 and 40 lbf.in (0.51 and 0.45 m.daN ) T.
     (q) TORQUE the nut (28) to between 55 and 50 lbf.in (0.62 and 0.57 m.daN ) T.
     (r) Engage the plastic jaws (with the harness leads engaged in them) into the spring clips on the responder support brackets (4) and (30).
Subtask 26-12-18-865-052-A
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUENGINE/2/FIRE DET/LOOP B8WD2A07
49VUENGINE/1/FIRE DET/LOOP A7WD1A06
121VUENGINE/ENG2/FIRE DET/LOOP A7WD2Q39
121VUENGINE/ENG1/FIRE DET/LOOP B8WD1Q38
Subtask 26-12-18-860-050-A
C. Do the EIS start procedure (Upper ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).
Subtask 26-12-18-710-050-A
D. Do this test:
   (1) On the upper ECAM DU, make sure that the FIRE ENG1(2) LOOP A (B) FAULT message is out of view.
   (2) Do an operational test of the engine fire detection system (Ref. AMM TASK 26-12-00-710-001).
5. Close-up
Subtask 26-12-18-860-051-A
A. Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
Subtask 26-12-18-410-050-A
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
   (3) Remove the access platform(s).
   (4) Remove the WARNING NOTICE(S).
Subtask 26-12-18-862-050-A
C. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
[Rev.10 from 2021] 2026.04.01 06:38:01 UTC
"Aviabrain" 2025