DOC AIRBUS | AMM A320FVisual Inspection of the Ignition Exciter [CFML]
TASK 74-11-05-210-801-A
Visual Inspection of the Ignition Exciter
Self explanatory
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 74-11-05-941-052-A
Subtask 74-11-05-020-052-A
Subtask 74-11-05-410-052-A
[Rev.10 from 2021]
2026.04.01 03:08:43 UTC
Visual Inspection of the Ignition Exciter
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:
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.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-70-00-910-804-A | Electrical Standard Practices |
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-803-A | Closing of the Fan Cowl Doors |
| TASK 74-11-05-000-801-A | Removal of Ignition Exciter 1 |
| TASK 74-11-05-000-802-A | Removal of Ignition Exciter 2 |
| TASK 74-11-05-140-801-A | Mechanical Cleaning of the Ignition Exciter |
| TASK 74-11-05-400-801-A | Installation of Ignition Exciter 1 |
| TASK 74-11-05-400-802-A | Installation of Ignition Exciter 2 |
| TASK 78-30-00-040-809-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-30-00-440-809-A | Reactivation of the Thrust Reverser System after Ground Maintenance |
| TASK 78-36-00-010-806-A | Opening of the Thrust Reverser Cowl Doors |
| TASK 78-36-00-410-806-A | Closing of the Thrust Reverser Cowl Doors |
Ignition ExciterSubtask 74-11-05-941-052-A
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 74-11-05-865-053-A (1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch, and
- The ENG/MASTER 1(2) control switch.
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 74-11-05-010-054-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | ENGINE/1 AND 2/IGN/SYS A | 1JH | A03 |
| FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1) | |||
| 121VU | ENGINE/IGN/ENG1/SYS B | 3JH1 | P41 |
| FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2) | |||
| 121VU | ENGINE/IGN/ENG2/SYS B | 3JH2 | P42 |
C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position.
Subtask 74-11-05-040-052-A (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position.
D. Deactivation of the Thrust Reverser System for Maintenance
Subtask 74-11-05-010-055-A 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) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-809). E. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
4. Procedure(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
Subtask 74-11-05-020-052-A
A. Removal of the Exciter Box Shroud Lid
(1) Remove the four bolts (3) that attach the exciter box shroud lid (2) to the exciter box shroud (1).
Subtask 74-11-05-020-053-A (1) Remove the four bolts (3) that attach the exciter box shroud lid (2) to the exciter box shroud (1).
B. Disconnection of the Ignition Leads
(2) Disconnect the ignition lead 1 (9) from the ignition exciter 1 (4).
Subtask 74-11-05-020-054-A CAUTION:
DO NOT TWIST OR BEND THE IGNITION LEADS. IF YOU DO, DAMAGE TO THE LEADS CAN OCCUR.
(1) Disconnect the ignition lead 2 (8) from the ignition exciter 2 (7). (2) Disconnect the ignition lead 1 (9) from the ignition exciter 1 (4).
C. Disconnection of the Electrical Harness Connectors
(1) Disconnect the electrical harness (6) connector from the ignition exciter 2 (7) (Ref. AMM TASK 70-70-00-910-804).
(2) Disconnect the electrical harness (5) connector from the ignition exciter 1 (4) (Ref. AMM TASK 70-70-00-910-804).
Subtask 74-11-05-210-050-A (1) Disconnect the electrical harness (6) connector from the ignition exciter 2 (7) (Ref. AMM TASK 70-70-00-910-804).
(2) Disconnect the electrical harness (5) connector from the ignition exciter 1 (4) (Ref. AMM TASK 70-70-00-910-804).
D. Visual Inspection of the Ignition Exciter
Subtask 74-11-05-420-052-A | INSPECT/CHECK | MAXIMUM SERVICEABLE LIMITS | REMARKS |
|---|---|---|
| 1.All areas for: | | |
| Not serviceable | Replace the ignition exciter (Ref. AMM TASK 74-11-05-000-801) and (Ref. AMM TASK 74-11-05-000-801) and/or (Ref. AMM TASK 74-11-05-000-802) and (Ref. AMM TASK 74-11-05-400-802). |
| Any number 0.030 in. (0.76 mm) deep | Replace the ignition exciter (Ref. AMM TASK 74-11-05-000-801) and (Ref. AMM TASK 74-11-05-400-801) and/or (Ref. AMM TASK 74-11-05-000-802) and (Ref. AMM TASK 74-11-05-400-802). |
| 2.Electrical connectors for: | | |
| 30 percent damage on one lead-in or 20 percent damage of two lead-in threads | Replace the ignition exciter (Ref. AMM TASK 74-11-05-000-801) and (Ref. AMM TASK 74-11-05-400-801), and/or (Ref. AMM TASK 74-11-05-000-802) and (Ref. AMM TASK 74-11-05-400-802). |
| Must mate freely with respective leads | Replace the ignition exciter (Ref. AMM TASK 74-11-05-000-801) and (Ref. AMM TASK 74-11-05-400-801) and/or (Ref. AMM TASK 74-11-05-000-802) and (Ref. AMM TASK 74-11-05-400-802). |
| Not serviceable | Clean the connector well (Ref. AMM TASK 74-11-05-140-801). |
E. Connection of the Electrical Harness Connectors
(1) Connect the electrical harness (5) connector to the ignition exciter 1 (4) (Ref. AMM TASK 70-70-00-910-804).
(2) Connect the electrical harness (6) connector to the ignition exciter 2 (7) (Ref. AMM TASK 70-70-00-910-804).
Subtask 74-11-05-420-053-A (1) Connect the electrical harness (5) connector to the ignition exciter 1 (4) (Ref. AMM TASK 70-70-00-910-804).
(2) Connect the electrical harness (6) connector to the ignition exciter 2 (7) (Ref. AMM TASK 70-70-00-910-804).
F. Connection of the Ignition Leads
(2) Connect the ignition lead 1 (9) to the ignition exciter 1 (4).
Subtask 74-11-05-420-054-A CAUTION:
DO NOT TWIST OR BEND THE IGNITION LEADS. IF YOU DO, DAMAGE TO THE LEADS CAN OCCUR.
(1) Connect the ignition lead 2 (8) to the ignition exciter 2 (7). (2) Connect the ignition lead 1 (9) to the ignition exciter 1 (4).
G. Installation of the Exciter Box Shroud Lid
(1) Put the exciter-box shroud lid (2) in position.
(2) Install the four bolts (3) that attach the exciter-box shroud lid (2) to exciter box shroud (1).
(3) TORQUE the four bolts (3) to between 124 and 106 lbf.in (1.40 and 1.20 m.daN )
.
5. Close-up(1) Put the exciter-box shroud lid (2) in position.
(2) Install the four bolts (3) that attach the exciter-box shroud lid (2) to exciter box shroud (1).
(3) TORQUE the four bolts (3) to between 124 and 106 lbf.in (1.40 and 1.20 m.daN )
. Subtask 74-11-05-410-052-A
A. 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 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
Subtask 74-11-05-440-051-A (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 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-809).
Subtask 74-11-05-410-053-A C. Close Access
(1) Remove the access platform(s).
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
Subtask 74-11-05-865-054-A (1) Remove the access platform(s).
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 74-11-05-942-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | ENGINE/1 AND 2/IGN/SYS A | 1JH | A03 |
| FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1) | |||
| 121VU | ENGINE/IGN/ENG1/SYS B | 3JH1 | P41 |
| FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2) | |||
| 121VU | ENGINE/IGN/ENG2/SYS B | 3JH2 | P42 |
E. Put the aircraft back to its initial configuration.
(1) Remove the access platform(s).
(2) Remove the WARNING NOTICE(S).
(1) Remove the access platform(s).
(2) Remove the WARNING NOTICE(S).