DOC AIRBUS | AMM A320FRemoval of the Spark Igniter [CFMB]
TASK 74-21-30-000-002-A
Removal of the Spark Igniter
This task gives the data to remove the right spark igniter (system A) or the left spark igniter (system B).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 74-21-30-941-052-A ** ON A/C NOT FOR ALL
Subtask 74-21-30-020-052-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:07:46 UTC
Removal of the Spark Igniter
WARNING:
BEFORE YOU START WORK ON THE IGNITION SYSTEM, MAKE SURE THAT THE IGNITION EXCITERS ARE DE-ENERGIZED FOR A MINIMUM OF FIVE MINUTES. ALSO DO NOT TOUCH THE ELECTRICAL CONTACTS.
THE IGNITION SYSTEM VOLTAGE IS VERY HIGH, AND THE IGNITION EXCITERS CAN HAVE AN ELECTRICAL CHARGE EVEN WHEN NOT ENERGIZED. IF YOU DO NOT OBEY THESE PRECAUTIONS, INJURY CAN OCCUR.
CAUTION:
BE CAREFUL WITH THE IGNITION LEAD TO PREVENT DAMAGE TO THE CONDUIT AND THE INTERNAL WIRES.
1. Reason for the JobThis task gives the data to remove the right spark igniter (system A) or the left spark igniter (system B).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | COVER - PROTECTION |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| 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 |
Spark IgniterSubtask 74-21-30-941-052-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 74-21-30-010-055-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 74-21-30-040-054-A ** ON A/C NOT FOR ALL Subtask 74-21-30-010-059-A ** ON A/C NOT FOR ALL (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 74-21-30-865-055-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
E. Open, safety and tag this(these) circuit breaker(s):
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | ENGINE/1 AND 2/IGN/SYS A | 1JH | A03 |
| FOR FIN: 1000EM1 (ENGINE1) | |||
| 121VU | ENGINE/IGN/ENG1/SYS B | 3JH1 | P41 |
| 121VU | ENGINE/IGN/ENG1/SYS A BAT | 2JH1 | P39 |
| FOR FIN: 1000EM2 (ENGINE2) | |||
| 121VU | ENGINE/IGN/ENG2/SYS B | 3JH2 | P42 |
| 121VU | ENGINE/IGN/ENG2/SYS A BAT | 2JH2 | P40 |
Subtask 74-21-30-020-052-A ** ON A/C NOT FOR ALL
A. Removal of the Spark Igniter
(2) Disconnect the shroud clamp and remove the cooling shroud.
(3) Remove the ignition lead.
PRE SB 74-002
(4) Remove and discard the white chamfered silicone seal and keep the caged spring assembly.
END OF PRE SB 74-002
POST SB 74-002
(5) Remove and discard the blue symmetrical silicone seal.
END OF SB 74-002
(6) Install COVER - PROTECTION on the ignition lead.
(7) Remove the spark igniter from the igniter bushing on the combustion case.
(8) Install COVER - PROTECTION on the igniter bushing.
CAUTION:
MAKE SURE THE HINGE CLAMP NEAREST TO THE SPARK IGNITER IS LOOSE, OR REMOVED, BEFORE YOU REMOVE THE IGNITION LEAD FROM THE SPARK IGNITER. THIS WILL PREVENT DAMAGE TO THE CERAMIC TIP OF THE SPARK IGNITER.
(1) Open the first hinge clamp and remove the ignition lead from the clamp. (2) Disconnect the shroud clamp and remove the cooling shroud.
(3) Remove the ignition lead.
CAUTION:
MAKE SURE THAT YOUR HANDS AND TOOLS ARE CLEAN. DO NOT TOUCH THE IGNITION LEAD OR THE SPARK IGNITER WITH DIRTY OR GREASY HANDS AND TOOLS, DIRT AND GREASE WILL CAUSE DAMAGE TO THE IGNITION LEAD AND THE SPARK IGNITER.
(a) Loosen the coupling nut and remove the ignition lead from the spark igniter. Pull the ignition lead straight out (no side loading) until free from the spark igniter. PRE SB 74-002
(4) Remove and discard the white chamfered silicone seal and keep the caged spring assembly.
END OF PRE SB 74-002
POST SB 74-002
(5) Remove and discard the blue symmetrical silicone seal.
NOTE: The blue symmetrical silicone seal and white chamfered silicone seal are not interchangeable.
END OF SB 74-002
(6) Install COVER - PROTECTION on the ignition lead.
(7) Remove the spark igniter from the igniter bushing on the combustion case.
(8) Install COVER - PROTECTION on the igniter bushing.