Installation of the Fan Fire Detectors

TASK 26-12-15-400-041-A
Installation of the Fan Fire Detectors

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 4000WD1 ** ON A/C NOT FOR ALL
FIN: 4000WD2 ** 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	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP1040)	methyl ethyl ketone
(Material No.CP2244)	primer 1200
(Material No.14SBA1)	Textile-Lint free Cotton -
No specific	primer SS4004
No specific	sealant two part thixotropic silicone DC90-006
No specific	sealant two parts thixotropic silicone RTV-88

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (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 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
Fan Fire Detectors (4000WD1, 4000WD2)

3. Job Set-up
Subtask 26-12-15-860-050-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) 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 ground service network is energized (Ref. AMM TASK 24-42-00-861-001).

Subtask 26-12-15-010-055-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 26-12-15-865-057-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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

4. Procedure
Subtask 26-12-15-420-052-A ** ON A/C NOT FOR ALL

A. Installation of the Fan Fire Detector

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) Attach the fire detector (5) to the brackets installed on the accessory gearbox with clamps (10) and (15).

AFTER SB RA32026-6

(2) Install the grommets (20) on the fire-detector (5) support tube as follows:
(a) Wipe and clean surfaces.
1 Use a Textile-Lint free Cotton - (Material No.14SBA1) moist with methyl ethyl ketone (Material No.CP1040) to wipe the areas on the support tube where the grommets will be installed.
2 Use a Textile-Lint free Cotton - (Material No.14SBA1) moist with methyl ethyl ketone (Material No.CP1040) to clean the inner surfaces of the grommets (20).
(b) Apply primer.
1 Apply the primer 1200 (Material No.CP2244) or primer SS4004 to the inside surface of the grommets (20) and to the areas of the support tube where the grommets will be installed.

NOTE: Let the primer dry for a minimum of 20 minutes at room temperature before the sealant is applied.

(c) Apply sealant.
1 Mix the two parts of the sealant two part thixotropic silicone DC90-006 or sealant two parts thixotropic silicone RTV-88.
(d) Apply the sealant to the inside surface of the grommets (20) and to the areas of the support tube where the grommets will be located.
(e) Put the grommets (20) in position on the support tube.
(f) Install tie wraps (25) on the two ends of each grommet (20) to hold them in place.

END OF SB RA32026-6

(3) Remove the blanking caps from the connectors 4000WD1A, 4000WD2A and the fire detector.
(4) Connect the electrical connectors 4000WD1A and 4000WD2A to the fire detector (5). Tighten the connectors by hand and lock them by one-eighth turn.

Subtask 26-12-15-865-058-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

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

Subtask 26-12-15-860-051-A ** ON A/C NOT FOR ALL

C. Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

Subtask 26-12-15-710-052-A ** ON A/C NOT FOR ALL

D. Do this test.
(1) On the ECAM 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
Subtask 26-12-15-860-052-A ** ON A/C NOT FOR ALL

A. Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).

Subtask 26-12-15-410-052-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 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
(3) Remove the WARNING NOTICE(S).

Subtask 26-12-15-862-052-A ** ON A/C NOT FOR ALL

C. De-energize the ground service network (Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.01 13:04:46 UTC