DOC AIRBUS | AMM A320FInstallation of the Core Fire Detectors
TASK 26-12-17-400-041-A
Installation of the Core Fire Detectors
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 26-12-17-860-050-A ** ON A/C NOT FOR ALL
Subtask 26-12-17-420-050-A ** ON A/C NOT FOR ALL
Subtask 26-12-17-860-053-A ** ON A/C NOT FOR ALL Subtask 26-12-17-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.03.31 23:43:03 UTC
Installation 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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1041) | isopropyl alcohol |
| (Material No.CP8001) | lockwire 0.032 in. (0.8 mm) dia. |
| (Material No.CP8002) | lockwire 0.032 in. (0.8 mm) dia |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| 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 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-B | Closing of the Fan Cowl Doors |
| TASK 78-30-00-081-041-B | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-B | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-B | Opening of the Thrust Reverser Doors |
| TASK 78-36-00-410-040-B | Closing of the Thrust Reverser Doors |
Core Fire Detector - Left SideSubtask 26-12-17-860-050-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(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) in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(4) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
Subtask 26-12-17-865-051-A ** ON A/C NOT FOR ALL (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) in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(4) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 26-12-17-010-052-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | ENGINE/2/FIRE DET/LOOP B | 8WD2 | A07 |
| 49VU | ENGINE/1/FIRE DET/LOOP A | 7WD1 | A06 |
| 121VU | ENGINE/ENG2/FIRE DET/LOOP A | 7WD2 | Q39 |
| 121VU | ENGINE/ENG1/FIRE DET/LOOP B | 8WD1 | Q38 |
C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 26-12-17-040-051-A ** ON A/C NOT FOR ALL 4. Procedure(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 26-12-17-420-050-A ** ON A/C NOT FOR ALL
A. Installation of the Core Fire Detectors
(a) Clean all bonding surfaces with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with isopropyl alcohol (Material No.CP1041) .
(b) Dry the bonding surfaces with a clean cloth before the solvent evaporates.
(2) Install the fire detector sensors on the engine brackets, as follows:
(b) Put the fire detector (4001WD2) in place on the engine bracket and attach it with the bolts (65), washers (70), and nuts (75) (2 locations).
(c) TORQUE the nuts (75) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
.
(3) Do an electrical resistance test to make sure there is a good electrical bond between the fire detector, the rail assembly, and the engine bracket:
(a) Put one lead of the MILLIOHMMETER 0.01 OHM - LOW VOLTAGE on the fire detector (5) or (115).
(b) Put the other lead of the ohmmeter on the engine bracket.
(c) The resistance measured between the ohmmeter leads must be 0.0025 ohm or less.
(d) If the resistance is more than 0.0025 ohm, remove the fasteners and clean the bonding surfaces again. Do this procedure until the resistance indication is in the correct range.
(4) Install the wire harness (4204KS) on the loop A fire-detector sensor (4001WD1):
(a) Put the harness wire (55) on terminal C of the sensor (5) and attach it with nut (50).
(b) TORQUE the nut (50) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ).
(c) Put the harness wire (60) on terminal A of the sensor (5) and attach it with the nut (45).
(d) Put the lock washer (85), flat washer (70) and ground wire (80) on the ground stud (65).
(e) Put the ground stud through the sensor and engine bracket and attach it with the washer (70) and nut (45).
(f) TORQUE the nuts (45) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN ).
(g) Put the clamp (40) on the harness (4204KS) and attach it with the screws (35).
(h) TORQUE the screws (35) to between 10 and 8 lbf.in (0.11 and 0.09 m.daN ).
(i) Lock the screws (35) withCP8001 lockwire 0.032 in. (0.8 mm) dia. CP8002 lockwire 0.032 in. (0.8 mm) dia
(5) Install the wire harness (4205KS) on the loop B fire-detector sensor (4001WD2):
(a) Put the harness wire (110) on terminal C of the sensor (115) and attach it with nut (50).
(b) TORQUE the nut (50) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ).
(c) Put the harness wire (120) on terminal A of the sensor (115) and attach it with nut (45).
(d) Put the lock washer (85), flat washer (70) and ground wire (105) on the ground stud (65).
(e) Put the ground stud through the sensor and engine bracket and attach it with the washer (70) and nut (45).
(f) TORQUE the nuts (45) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN ).
(g) Put the clamp (40) on the harness (4205KS) and attach it with the screws (35).
(h) TORQUE the screws (35) to between 10 and 8 lbf.in (0.11 and 0.09 m.daN ).
(i) Lock the screws (35) withCP8001 lockwire 0.032 in. (0.8 mm) dia. CP8002 lockwire 0.032 in. (0.8 mm) dia
(6) Connect the rail assembly (20) to the engine brackets, as follows:
(a) Make sure that the fire detector rail assembly (20) is in the correct position on the engine.
(b) Move the center mount clamps (15) in position on mounting bracket (30) (10 locations).
(c) Turn the screw (10) to attach the clamp (15) to the bracket (30).
Subtask 26-12-17-865-052-A ** ON A/C NOT FOR ALL WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
CAUTION:
INSTALL THE FIRE DETECTORS AND THE RAIL AS ONE ASSEMBLY. THE FIRE DETECTOR SENSOR ELEMENTS CAN BE DAMAGED IF NOT SUPPORTED BY THE RAIL.
(1) Make sure that there is a good electrical bond between the sensors (5, 115), the rail assembly (20) and the engine bracket: (a) Clean all bonding surfaces with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with isopropyl alcohol (Material No.CP1041) .
(b) Dry the bonding surfaces with a clean cloth before the solvent evaporates.
(2) Install the fire detector sensors on the engine brackets, as follows:
NOTE: Sensor tubes are to follow contour of rail smoothly. Minimum bend radius 0.35 IN. (8.89 MM).
NOTE: Maximum overhang of fire detector sensor tube 1 IN. (25.40 MM). Sensor tube termination through dual liner as required.
NOTE: 0.1 IN. (2.54 MM) clearance between two sensor tubes.
NOTE: 0.125 IN. (3.17 MM) minimum clearance between fire detector sensor tubes and metal band of clamp. Rotate clamp so that clamp minimum envelope is next to tube.
(a) Put the fire detector (4001WD1) in place on the engine bracket and attach it with the bolt (65), washer (70), and nut (75) (one location only). (b) Put the fire detector (4001WD2) in place on the engine bracket and attach it with the bolts (65), washers (70), and nuts (75) (2 locations).
(c) TORQUE the nuts (75) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
. (3) Do an electrical resistance test to make sure there is a good electrical bond between the fire detector, the rail assembly, and the engine bracket:
(a) Put one lead of the MILLIOHMMETER 0.01 OHM - LOW VOLTAGE on the fire detector (5) or (115).
(b) Put the other lead of the ohmmeter on the engine bracket.
(c) The resistance measured between the ohmmeter leads must be 0.0025 ohm or less.
(d) If the resistance is more than 0.0025 ohm, remove the fasteners and clean the bonding surfaces again. Do this procedure until the resistance indication is in the correct range.
(4) Install the wire harness (4204KS) on the loop A fire-detector sensor (4001WD1):
(a) Put the harness wire (55) on terminal C of the sensor (5) and attach it with nut (50).
(b) TORQUE the nut (50) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
. (c) Put the harness wire (60) on terminal A of the sensor (5) and attach it with the nut (45).
(d) Put the lock washer (85), flat washer (70) and ground wire (80) on the ground stud (65).
(e) Put the ground stud through the sensor and engine bracket and attach it with the washer (70) and nut (45).
(f) TORQUE the nuts (45) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN )
. (g) Put the clamp (40) on the harness (4204KS) and attach it with the screws (35).
(h) TORQUE the screws (35) to between 10 and 8 lbf.in (0.11 and 0.09 m.daN )
. (i) Lock the screws (35) with
(5) Install the wire harness (4205KS) on the loop B fire-detector sensor (4001WD2):
(a) Put the harness wire (110) on terminal C of the sensor (115) and attach it with nut (50).
(b) TORQUE the nut (50) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
. (c) Put the harness wire (120) on terminal A of the sensor (115) and attach it with nut (45).
(d) Put the lock washer (85), flat washer (70) and ground wire (105) on the ground stud (65).
(e) Put the ground stud through the sensor and engine bracket and attach it with the washer (70) and nut (45).
(f) TORQUE the nuts (45) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN )
. (g) Put the clamp (40) on the harness (4205KS) and attach it with the screws (35).
(h) TORQUE the screws (35) to between 10 and 8 lbf.in (0.11 and 0.09 m.daN )
. (i) Lock the screws (35) with
(6) Connect the rail assembly (20) to the engine brackets, as follows:
(a) Make sure that the fire detector rail assembly (20) is in the correct position on the engine.
(b) Move the center mount clamps (15) in position on mounting bracket (30) (10 locations).
(c) Turn the screw (10) to attach the clamp (15) to the bracket (30).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 26-12-17-860-052-A ** ON A/C NOT FOR ALL Subtask 26-12-17-710-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | ENGINE/2/FIRE DET/LOOP B | 8WD2 | A07 |
| 49VU | ENGINE/1/FIRE DET/LOOP A | 7WD1 | A06 |
| 121VU | ENGINE/ENG2/FIRE DET/LOOP A | 7WD2 | Q39 |
| 121VU | ENGINE/ENG1/FIRE DET/LOOP B | 8WD1 | Q38 |
D. Do this test.
(1) On the upper DU, make sure that the FIRE ENG1(2) LOOP A (B) FAULT message has gone 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(1) On the upper DU, make sure that the FIRE ENG1(2) LOOP A (B) FAULT message has gone out of view .
(2) Do an operational test of the engine fire detection system (Ref. AMM TASK 26-12-00-710-001).
Subtask 26-12-17-860-053-A ** ON A/C NOT FOR ALL Subtask 26-12-17-410-050-A ** ON A/C NOT FOR ALL
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 26-12-17-440-050-A ** ON A/C NOT FOR ALL Subtask 26-12-17-410-051-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
D. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
Subtask 26-12-17-862-050-A ** ON A/C NOT FOR ALL (1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).