DOC AIRBUS | AMM A320FBlend Repair of the Stage 1 Booster Vane Assembly [CFML]
TASK 72-21-00-300-806-A
Blend Repair of the Stage 1 Booster Vane Assembly
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 72-21-00-941-103-A
Subtask 72-21-00-942-085-A
[Rev.10 from 2021]
2026.04.01 02:51:18 UTC
Blend Repair of the Stage 1 Booster Vane Assembly
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:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 400
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 1M(3 FT) |
| No specific | 1 | FILE - SMOOTH |
| No specific | AR | WARNING NOTICE(S) |
| 956A7616 | 1 | MAT, PROTECTION - INLET COWL |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2721) | abrasive cloth, silicon carbide (CS333X) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-25-00-910-802-A | Fluorescent-Penetrant Inspection-Portable-Water Washable |
| TASK 72-21-20-000-801-A | Removal of the Fan Blades |
| TASK 72-21-20-400-801-A | Installation of the Fan Blades |
Blend Repair of the Stage 1 Booster Vane AssemblySubtask 72-21-00-941-103-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 the 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 the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 72-21-00-010-079-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 the WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch
- 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 the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Put the ACCESS PLATFORM 1M(3 FT) in position.
(2) Install the 956A7616 MAT, PROTECTION - INLET COWL in the inlet cowl.
(3) Remove the fan rotor blades (Ref. AMM TASK 72-21-20-000-801).
(a) Make sure that you number each blade while you remove it. This will help to make sure that each blade is installed in its initial position.
4. Procedure(1) Put the ACCESS PLATFORM 1M(3 FT) in position.
(2) Install the 956A7616 MAT, PROTECTION - INLET COWL in the inlet cowl.
(3) Remove the fan rotor blades (Ref. AMM TASK 72-21-20-000-801).
(a) Make sure that you number each blade while you remove it. This will help to make sure that each blade is installed in its initial position.
WARNING:
DO NOT LET TITANIUM DUST COLLECT. TITANIUM DUST IS FLAMMABLE. DO NOT USE WATER TO EXTINGUISH A TITANIUM FIRE. EXTINGUISH WITH AN APPROVED CHEMICAL FOR METAL FIRES.
CAUTION:
DO NOT BLEND TITANIUM PARTS WITH TOOLS (SUCH AS GRINDING WHEELS, FILES, STONES OR ABRASIVE CLOTH) USED TO REPAIR OTHER MATERIALS.
Subtask 72-21-00-220-062-A A. Do the count of the number of airfoils that are blended.
(1) Make sure that a maximum of six vanes are blended for all the stage.
(a) If there are already six blended vanes, then the part is not repairable.
(b) If there are less than six blended vanes, then the part is repairable, but make sure not to exceed six blended vanes.
Subtask 72-21-00-220-063-A (1) Make sure that a maximum of six vanes are blended for all the stage.
(a) If there are already six blended vanes, then the part is not repairable.
(b) If there are less than six blended vanes, then the part is repairable, but make sure not to exceed six blended vanes.
B. Do a check for dimensions and location of defects on the Leading Edge (LE).
(1) Make sure you compare the dimensions and location of defects on areas on the LE with repair limits.
Subtask 72-21-00-320-064-A (1) Make sure you compare the dimensions and location of defects on areas on the LE with repair limits.
| DESCRIPTION | MINIMUM IN-PROCESS DIMENSION | MAXIMUM IN-PROCESS DIMENSION | MINIMUM FINISH DIMENSION | MAXIMUM FINISH DIMENSION | REFERENCE DIMENSION |
| A.Definition of critical area (area A) | |||||
| Dim. K | - | - | - | - | 10.0 mm (0.394 in.) |
| Dim. S1 | - | - | - | - | 30.0 mm (1.181 in.) |
| Dim. Z | - | - | - | - | 1.0 mm (0.039 in.) |
| B.Blending limits of LE (area B) | |||||
| Dim. P | - | - | - | 1.0 mm (0.039 in.) | - |
| Cumulative length of the blend repairs (per airfoil) | - | 10.0 mm (0.394 in.) | - | ||
| C.Blend repair proportion on LE | |||||
| Radius R | - | - | 5 x Dim. P | - | - |
| Radius r | - | - | 2 x Dim. P | - | - |
| Dim. L | - | - | 6 x Dim. P | - | - |
Table - Dimensional Limits
(2) If the damage or repair area is more than the limits, the part is not repairable by this procedure. C. Alternative procedure available. Do the blending with a FILE - SMOOTH or strips of CP2721 abrasive cloth, silicon carbide (CS333X) SPM 704111 (Hand blending).
(a) Make sure that you do not blend more than the permitted limits (do not exceed Dim. P).
(3)
Subtask 72-21-00-320-065-A CAUTION:
DO NOT BLEND THE BOOSTER VANE PLATFORM. IF YOU DO, DAMAGE TO THE BOOSTER VANE PLATFORM WILL OCCUR.
CAUTION:
DO NOT BLEND AREAS A AND D.
DO NOT DO A REWORK IN AREAS A AND D.
IF YOU DO, DAMAGE TO AREAS A AND D WILL OCCUR.
CAUTION:
DO NOT USE ABRASIVE MATERIALS OTHER THAN SILICON CARBIDE. IF YOU DO, THERE IS A RISK THAT REPAIR OF THE PARTS WILL NOT BE POSSIBLE.
(1) (2) Remove a minimum of 0.025 mm (0.001 in.) of base metal in addition to depth of the defect. (a) Make sure that you do not blend more than the permitted limits (do not exceed Dim. P).
(3)
NOTE: You can do this on the LE and/or TE.
D. Alternative procedure. Do a power blending SPM 704112 (power blending).
(a) Make sure that you do not blend more than the permitted limits (do not exceed Dim. P).
(3)
Subtask 72-21-00-230-058-A CAUTION:
DO NOT BLEND THE BOOSTER VANE PLATFORM. IF YOU DO, DAMAGE TO THE BOOSTER VANE PLATFORM WILL OCCUR.
CAUTION:
DO NOT BLEND AREAS A AND D.
DO NOT DO A REWORK IN AREAS A AND D.
IF YOU DO, DAMAGE TO AREAS A AND D WILL OCCUR.
CAUTION:
DO NOT USE ABRASIVE MATERIALS OTHER THAN SILICON CARBIDE. IF YOU DO, THERE IS A RISK THAT REPAIR OF THE PARTS WILL NOT BE POSSIBLE.
(1) (2) Remove a minimum of 0.025 mm (0.001 in.) of base metal in addition to depth defect. (a) Make sure that you do not blend more than the permitted limits (do not exceed Dim. P).
(3)
NOTE: You can do this on the LE and/or TE.
E. Do a high sensitivity, level 3, fluorescent-penetrant inspection on the reworked area (Ref. AMM TASK 70-25-00-910-802).
(1) Make sure that there are no cracks.
5. Close-up(1) Make sure that there are no cracks.
Subtask 72-21-00-942-085-A
A. Close Access
(1) Install the fan rotor blades (Ref. AMM TASK 72-21-20-400-801).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the 956A7616 MAT, PROTECTION - INLET COWL from the inlet cowl.
(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(S).
(1) Install the fan rotor blades (Ref. AMM TASK 72-21-20-400-801).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the 956A7616 MAT, PROTECTION - INLET COWL from the inlet cowl.
(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(S).