Installation of the Pylon Fire-Detector Ramp-Assembly

TASK 26-12-16-400-802-A
Installation of the Pylon Fire-Detector Ramp-Assembly

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: ALWAYS USE APPLICABLE GLOVES TO TOUCH HOT PARTS. HOT PARTS CAN CAUSE INJURY TO PERSONS.

ZONE: 415
ZONE: 425
FIN: 3WD1 ** ON A/C NOT FOR ALL
FIN: 3WD2 ** ON A/C NOT FOR ALL
FIN: 4WD1 ** ON A/C NOT FOR ALL
FIN: 4WD2 ** 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	Torque wrench: range to between 0.28 and 0.23 m.daN (24.78 and 20.35 lbf.in )
No specific	Torque wrench: range to between 0.4 and 0.34 m.daN (35.40 and 30.09 lbf.in )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
415	LOWER PYLON
425	LOWER PYLON
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

C. 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 36-11-49-000-824-A	Removal of the Environmental Control System (ECS) Interface Duct
TASK 36-11-49-400-824-A	Installation of the Environmental Control System (ECS) Interface Duct
TASK 36-11-53-000-802-A	Removal of the Overpressure Valve
TASK 36-11-53-400-802-A	Installation of the Overpressure Valve
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 75-25-49-000-802-A	Removal of the Turbine Cooling Air System
TASK 75-25-49-400-802-A	Installation of the Turbine Cooling Air System
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Pylon Fire-Detectors Ramp-Assembly ** ON A/C NOT FOR ALL
Pylon Fire-Detectors Ramp-Assembly ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 26-12-16-861-053-A ** ON A/C NOT FOR ALL

A. Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).

Subtask 26-12-16-860-059-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 26-12-16-865-059-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
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VU	ENGINE/1/FIRE DET/LOOP A	7WD1	A06
121VU	ENGINE/ENG1/FIRE DET/LOOP B	8WD1	Q38
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VU	ENGINE/2/FIRE DET/LOOP B	8WD2	A07
121VU	ENGINE/ENG2/FIRE DET/LOOP A	7WD2	Q39

Subtask 26-12-16-010-062-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that these fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Make sure that an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

Subtask 26-12-16-040-056-A ** ON A/C NOT FOR ALL

E. Deactivation of the Thrust Reverser for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that the thrust reverser system is deactivated for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 26-12-16-010-063-A ** ON A/C NOT FOR ALL

F. Get Access
(1) Make sure that the thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

Subtask 26-12-16-020-056-A ** ON A/C NOT FOR ALL

G. Removal of the Components
(1) Make sure that the OPV is removed (Ref. AMM TASK 36-11-53-000-802).
(2) Make sure that the Environmental Control System (ECS) L-duct is removed (Ref. AMM TASK 36-11-49-000-824).
(3) If necessary, remove the turbine cooling air-system-pipe (Ref. AMM TASK 75-25-49-000-802).

4. Procedure
Subtask 26-12-16-420-055-A ** ON A/C NOT FOR ALL

A. Installation of the Pylon Fire-Detector Ramp-Assembly

CAUTION: DO NOT BEND THE MANIFOLD OF THE SENSING ELEMENT. IF YOU BEND IT, YOU CAN CAUSE DAMAGE TO THE WELDING.

(1) Carefully put the ramp assembly (4) in position on the structure (3).
(2) Install the washers (2) and the screws (1) on the ramp assembly (4) and tighten then.
(3) Remove the CAP-BLANKING from each electrical connector and receptacle.
(4) Make sure that all the electrical connections are clean and in the correct condition.
(5) Install the two electrical connectors (7).
(a) Put the two electrical connectors (7) in position on the two responders (5) and the two clamps (10).
(b) Install the two nuts (6) on the two responders (5).
1 TORQUE the two nuts (6) to between 0.28 and 0.23 m.daN (24.78 and 20.35 lbf.in )

.
(6) Install the two electrical connectors (9)
(a) Put the two electrical connectors (9) in position on the two responders (5) and the two clamps (10).
(b) Install the two nuts (8) on the two responders (5).
1 TORQUE the two nuts (8) to between 0.4 and 0.34 m.daN (35.40 and 30.09 lbf.in )

.
(7) Close the four clamps (10).

CAUTION: DO NOT USE ELECTRICAL OR PNEUMATIC TOOLS TO LOOSEN OR TIGHTEN THE QUARTER-TURN FASTENER ON THE FIRE DETECTOR CLAMP. ONLY USE A MANUAL SCREWDRIVER. ELECTRICAL OR PNEUMATIC TOOLS WILL CAUSE THE FASTENER TO TURN TOO MUCH AND POSSIBLY TO BREAK.

(a) Close the clamps (10) and lock them with the quarter-turn fasteners (11).

Subtask 26-12-16-865-060-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
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VU	ENGINE/1/FIRE DET/LOOP A	7WD1	A06
121VU	ENGINE/ENG1/FIRE DET/LOOP B	8WD1	Q38
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VU	ENGINE/2/FIRE DET/LOOP B	8WD2	A07
121VU	ENGINE/ENG2/FIRE DET/LOOP A	7WD2	Q39

Subtask 26-12-16-860-060-A ** ON A/C NOT FOR ALL

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

Subtask 26-12-16-710-053-A ** ON A/C NOT FOR ALL

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).

Subtask 26-12-16-860-061-A ** ON A/C NOT FOR ALL

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

5. Close-up
Subtask 26-12-16-420-056-A ** ON A/C NOT FOR ALL

A. Installation of the Components
(1) Install the ECS L-duct (Ref. AMM TASK 36-11-49-400-824).
(2) Install the OPV (Ref. AMM TASK 36-11-53-400-802).
(3) If removed, install the turbine cooling air-system-pipe (Ref. AMM TASK 75-25-49-400-802).

Subtask 26-12-16-410-059-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 cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

Subtask 26-12-16-440-053-A ** ON A/C NOT FOR ALL

C. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 26-12-16-410-060-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

Subtask 26-12-16-862-051-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.03.31 23:42:50 UTC