DOC AIRBUS | AMM A320FRepair of the Burned or Pitted Igniter Contact [CFMB]
TASK 74-21-10-300-005-A
Repair of the Burned or Pitted Igniter Contact
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 74-21-10-020-055-A ** ON A/C NOT FOR ALL 4. Procedure
Subtask 74-21-10-350-054-A ** ON A/C NOT FOR ALL
Subtask 74-21-10-420-055-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:07:53 UTC
Repair of the Burned or Pitted Igniter Contact
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 | BLOCK - POLISHING, EXTRA FINE GRADE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1039) | acetone |
| (Material No.CP2011) | stoddard solvent |
| (Material No.CP2559) | ardrox 552 |
| (Material No.CP2560) | turco ind 79 |
| (Material No.CP2566) | mag-chem teksol |
| (Material No.CP2584) | degreasol 99 R |
| (Material No.CP2656) | mag-chem skysol |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 74-21-10-000-002-A | Removal of the Right Ignition Lead |
| TASK 74-21-10-400-002-A | Installation of the Right Ignition Lead |
Repair Igniter ContactSubtask 74-21-10-020-055-A ** ON A/C NOT FOR ALL 4. Procedure
Subtask 74-21-10-350-054-A ** ON A/C NOT FOR ALL
A. Removal of Burns and Pits
(1) Hold the end of the ignition lead firmly by hand. Clean the carbon deposits from the metal contact with BLOCK - POLISHING, EXTRA FINE GRADE or Unison Industries contact polishing tool (optional) P/N 11-10786-1 . Apply light pressure in a circular motion and keep the polishing block parallel to the contact surface.
(2) Continue to polish the igniter contact until the burns and pits are removed.
Subtask 74-21-10-220-051-A ** ON A/C NOT FOR ALL (1) Hold the end of the ignition lead firmly by hand. Clean the carbon deposits from the metal contact with BLOCK - POLISHING, EXTRA FINE GRADE or Unison Industries contact polishing tool (optional) P/N 11-10786-1 . Apply light pressure in a circular motion and keep the polishing block parallel to the contact surface.
(2) Continue to polish the igniter contact until the burns and pits are removed.
B. Measure the dimension between the contact face and the retaining ring groove. Replace the ignition lead if this dimension is less than 0.055 in. (1.4 mm).
Subtask 74-21-10-160-053-A ** ON A/C NOT FOR ALL C. Clean the ceramic insulator sleeve and contact with a Textile-Lint free Cotton - (Material No.14SBA1) that is moist with stoddard solvent (Material No.CP2011) or acetone (Material No.CP1039) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) .
5. Close-upSubtask 74-21-10-420-055-A ** ON A/C NOT FOR ALL