DOC AIRBUS | AMM A320FReplace the Shank Nuts of the Front Blade Retaining Ring - VRS1175 [IAE]
TASK 72-31-13-300-012-A
Replace the Shank Nuts of the Front Blade Retaining Ring - VRS1175
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 72-31-13-941-056-A ** ON A/C NOT FOR ALL
Subtask 72-31-13-020-050-B ** ON A/C NOT FOR ALL
(1) Fit a new shank nut into the flange location hole. Make sure the shank nut is installed correctly.
(2) Hold the shank nut in position and make a flare. Use PEENING TOOL, IAE 3J12713.
Subtask 72-31-13-220-053-A ** ON A/C NOT FOR ALL
Subtask 72-31-13-942-054-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:45:13 UTC
Replace the Shank Nuts of the Front Blade Retaining Ring - VRS1175
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 | ACCESS PLATFORM 1M(3 FT) |
| No specific | AR | MACHINE- RADIAL DRILLING |
| No specific | AR | MAT - WORK |
| No specific | 1 | PEENING TOOL |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V05-019) | Waterproof silicon carbide abrasive paper |
| (Material No.V05-020) | waterproof silicon carbide |
| (Material No.V05-021) | Waterproof silicon carbide abrasive paper |
| (Material No.V06-018) | fluorescent penetrant |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-23-05-230-010-A | Local Application of Fluorescent Penetrant Inspection |
| TASK 72-31-13-000-010-B | Removal of the Front Blade Retaining Ring |
| TASK 72-31-13-400-010-B | Installation of the Front Blade Retaining Ring |
Replace the Shank Nuts of the Front Retaining RingSubtask 72-31-13-941-056-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).
(4) Install the support equipment
(a) Put the ACCESS PLATFORM 1M(3 FT) in to position to give access to the engine for repair.
(b) Put the MAT - WORK in to position in the air intake cowl.
4. Procedure(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).
(4) Install the support equipment
(a) Put the ACCESS PLATFORM 1M(3 FT) in to position to give access to the engine for repair.
(b) Put the MAT - WORK in to position in the air intake cowl.
NOTE: Make sure that the red warning pennants of the workmat can be seen external of the aircraft.
NOTE: Make sure the workmat has sufficient dimensions to give full protection to the lower half of the intake cowl surface.
Subtask 72-31-13-020-050-B ** ON A/C NOT FOR ALL
A. Remove the front blade retaining ring assembly from the stage 1 fan disk assembly (Ref. AMM TASK 72-31-13-000-010).
Subtask 72-31-13-350-052-A ** ON A/C NOT FOR ALL B. Removed the damaged shank nuts of the front blade retaining ring assembly.
(1) Examine and identify the damaged shank nuts.
(2) Remove the damaged shank nut. Use a MACHINE- RADIAL DRILLING or equivalent, drill the flare of the shank nut until the flare twists. Use a 0.378in. (9,60mm) drill. Take care not to damage the flange bore or face.
(3) Remove the sharp edges around the nut location hole. Use Waterproof silicon carbide abrasive paper (Material No.V05-019) or waterproof silicon carbide (Material No.V05-020) or Waterproof silicon carbide abrasive paper (Material No.V05-021) .
(4) Clean the hole with a Textile-Lint free Cotton - (Material No.14SBA1) and blast with air.
Subtask 72-31-13-230-052-A ** ON A/C NOT FOR ALL (1) Examine and identify the damaged shank nuts.
(2) Remove the damaged shank nut. Use a MACHINE- RADIAL DRILLING or equivalent, drill the flare of the shank nut until the flare twists. Use a 0.378in. (9,60mm) drill. Take care not to damage the flange bore or face.
(3) Remove the sharp edges around the nut location hole. Use Waterproof silicon carbide abrasive paper (Material No.V05-019) or waterproof silicon carbide (Material No.V05-020) or Waterproof silicon carbide abrasive paper (Material No.V05-021) .
(4) Clean the hole with a Textile-Lint free Cotton - (Material No.14SBA1) and blast with air.
C. Examine the flange nut location hole of the front blade retaining ring assembly.
(1) Do a penetrant crack test. Use fluorescent penetrant (Material No.V06-018) (high post-emulsified). Refer to SPPM (Ref. AMM TASK 70-23-05-230-010). Cracks are not permitted.
Subtask 72-31-13-220-052-A ** ON A/C NOT FOR ALL (1) Do a penetrant crack test. Use fluorescent penetrant (Material No.V06-018) (high post-emulsified). Refer to SPPM (Ref. AMM TASK 70-23-05-230-010). Cracks are not permitted.
D. Examine the flange of the front blade retaining ring assembly.
(1) Visually inspect the nut location hole. Nicks, scratches and burrs are not permitted.
Subtask 72-31-13-350-053-A ** ON A/C NOT FOR ALL (1) Visually inspect the nut location hole. Nicks, scratches and burrs are not permitted.
CAUTION:
DO NOT DAMAGE THE PARENT METAL OF THE FRONT BLADE RETAINING RING.
E. Fit a new shank nut to the front blade retaining ring assembly. (1) Fit a new shank nut into the flange location hole. Make sure the shank nut is installed correctly.
(2) Hold the shank nut in position and make a flare. Use PEENING TOOL, IAE 3J12713.
NOTE: Shank nut must be firmly held against the flange before the start of swaging. Care must be taken that the flange does not become damaged. During swaging, the tool may damage the silver coating inside the shank. This is permitted and it is not necessary to touch up if coating is damaged. Any loose flakes of silver coating are to be removed.
F. Examine the shank nut of the front blade retaining ring assembly.
(1) Visually examine the shank nut hole. Flare should be evenly peened. Cracks are not permitted. Circumferential movement of nut to flange is permitted but there must be no axial movement.
Subtask 72-31-13-420-050-B ** ON A/C NOT FOR ALL (1) Visually examine the shank nut hole. Flare should be evenly peened. Cracks are not permitted. Circumferential movement of nut to flange is permitted but there must be no axial movement.
G. Install the front blade retaining ring assembly to the stage 1 fan disk assembly. (Ref. AMM TASK 72-31-13-400-010)
5. Close-upSubtask 72-31-13-942-054-A ** ON A/C NOT FOR ALL
A. Remove the support equipment.
(1) Remove the workmat.
(2) Remove the access platform.
(3) Remove the warning notices.
(1) Remove the workmat.
(2) Remove the access platform.
(3) Remove the warning notices.