Installation of the Igniter Plug (131-9(A))

TASK 49-41-41-400-004-A
Installation of the Igniter Plug (131-9(A))

WARNING: DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

WARNING: MAKE SURE THAT THE IGNITION UNIT IS DE-ENERGIZED AND GROUNDED BEFORE YOU DISCONNECT THE INPUT AND OUTPUT LEADS. DO NOT TOUCH THE CONTACTS OF THE OUTPUT TERMINAL. THE OUTPUT VOLTAGE FROM THE IGNITION UNIT IS HIGH AND DOES NOT DECREASE IMMEDIATELY AFTER DE-ENERGIZATION (THE UNIT IS OF THE CAPACITOR DISCHARGE TYPE). HIGH VOLTAGE CAN KILL YOU.

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

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 4M (13 FT)-ADJUSTABLE
No specific	1	WARNING NOTICE(S)
No specific	Torque wrench: range to between 2.66 and 2.42 m.daN (19.62 and 17.85 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03PBB1)	Lubricant-Anti Seize High Temp. -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	IGNITER PLUG	AIPC 49-41-09-01-050
4	GASKET	AIPC 49-41-09-01-060
3	THE IGNITER PLUG	AIPC 49-41-84-30-050
4	THE GASKET	AIPC 49-41-84-30-060

E. 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 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 49-00-00-710-010-A	Operational Test of the APU
TASK 52-41-00-010-001-A	Open the APU Doors for Access
TASK 52-41-00-410-001-A	Close the APU Doors after Access
Igniter Plug

3. Job Set-up
Subtask 49-41-41-860-059-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(2) On overhead control and indicating panel 25VU, make sure that the APU MASTER SW pushbutton switch is in the OFF position.
(3) Make sure that a WARNING NOTICE(S) is in position in the cockpit to tell persons not to start the APU.
(4) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
(5) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the APU compartment.
(6) Make sure that the APU access doors 315AL and 316AR are open (Ref. AMM TASK 52-41-00-010-001).
(7) Make sure that LIGHT control switch 11LJ is set to the ON position.
(8) Make sure that the low tension connector (1) is disconnected.

Subtask 49-41-41-865-061-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

4. Procedure
Subtask 49-41-41-420-054-A ** ON A/C NOT FOR ALL

CAUTION: ON THE TURBINE PLENUM, MAKE SURE THAT THE FLOATING RING CORRECTLY ALIGNS WITH THE IGNITER MOUNTING BOSS. IF THE POSITION OF THE FLOATING RING IS NOT CORRECT, USE A NON METALLIC TOOL TO ALIGN IT CORRECTLY BEFORE YOU INSTALL THE IGNITER PLUG. MAKE SURE THAT THE IGNITER PLUG DOES NOT TOUCH THE FLOATING RING DURING ITS INSTALLATION.

A. Installation of the Igniter Plug

NOTE: There is only one igniter plug. It is installed in the combustor assembly at 220 degrees seen from the rear.

(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Apply a thin layer of Lubricant-Anti Seize High Temp. - (Material No.03PBB1) to the threads between the AIPC 49-41-09-01-050 IGNITER PLUG (3) or AIPC 49-41-84-30-050 THE IGNITER PLUG (3) and the combustor assembly.
(4) Remove all the blanking caps and put the new AIPC 49-41-09-01-060 GASKET (4) or AIPC 49-41-84-30-060 THE GASKET (4) in position on the igniter plug (3).
(5) Make sure that the flat side of the gasket (4) is installed on the igniter plug boss.
(6) Install the igniter plug (3) and the gasket (4).
(7) TORQUE the igniter plug (3) to between 2.66 and 2.42 m.daN (19.62 and 17.85 lbf.ft )

.
(8) Connect the ignition electrical lead (2) to the igniter plug (3).
(9) TORQUE the connection of the ignition electrical lead (2) to between 2.66 and 2.42 m.daN (19.62 and 17.85 lbf.ft )

.
(10) Connect the electrical connector (1).

Subtask 49-41-41-865-062-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
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 49-41-41-710-052-A ** ON A/C NOT FOR ALL

C. Do the operational test of the APU (Ref. AMM TASK 49-00-00-710-010).

5. Close-up
Subtask 49-41-41-410-054-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Set LIGHT control switch 11LJ to the OFF position.
(3) Close APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-410-001).
(4) Remove the access platform(s).

Subtask 49-41-41-860-060-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Put the related hydraulic system in the pressurized configuration (Ref. AMM TASK 29-00-00-864-001).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 01:30:13 UTC