DOC AIRBUS | AMM A320FBlend Repair of the Stage 2 Booster Vane Assembly (POST SB 72-0080) [CFML]
TASK 72-21-00-300-808-A
Blend Repair of the Stage 2 Booster Vane Assembly (POST SB 72-0080)
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 72-21-00-941-105-A
Subtask 72-21-00-410-085-A
[Rev.10 from 2021]
2026.04.01 02:51:21 UTC
Blend Repair of the Stage 2 Booster Vane Assembly (POST SB 72-0080)
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.
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 |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-25-00-910-802-A | Fluorescent-Penetrant Inspection-Portable-Water Washable |
| TASK 72-21-02-000-802-A | Removal of the Flow Splitter |
| TASK 72-21-02-400-802-A | Installation of the Flow Splitter |
| TASK 72-21-20-000-801-A | Removal of the Fan Blades |
| TASK 72-21-20-400-801-A | Installation of the Fan Blades |
| TASK 72-21-21-000-801-A | Removal of the Low Pressure Compressor (LPC) Stage 1 Inlet Guide Vane (IGV) |
| TASK 72-21-21-400-801-A | Installation of the Low Pressure Compressor (LPC) Stage 1 Inlet Guide Vane (IGV) |
Stage 2 Booster Vane Assembly (POST SB 72-0080)Subtask 72-21-00-941-105-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).
(3) Put the ACCESS PLATFORM 1M(3 FT) in position.
(4) Install the 956A7616 MAT, PROTECTION - INLET COWL in the inlet cowl.
Subtask 72-21-00-010-081-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 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 the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
(3) Put the ACCESS PLATFORM 1M(3 FT) in position.
(4) Install the 956A7616 MAT, PROTECTION - INLET COWL in the inlet cowl.
B. Get Access
(1) Remove the fan rotor blades (Ref. AMM TASK 72-21-20-000-801).
(3) Remove the flow splitter (Ref. AMM TASK 72-21-02-000-802).
(4) Remove the stage 1 Inlet Guide Vane (IGV) (Ref. AMM TASK 72-21-21-000-801).
4. Procedure(1) Remove the fan rotor blades (Ref. AMM TASK 72-21-20-000-801).
NOTE: 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.
(2) Remove the rotating ring spacer (Ref. AMM D/O 72-21-25-00).(3) Remove the flow splitter (Ref. AMM TASK 72-21-02-000-802).
(4) Remove the stage 1 Inlet Guide Vane (IGV) (Ref. AMM TASK 72-21-21-000-801).
WARNING:
DO NOT LET TITANIUM DUST COLLECT. DISCARD ALL TITANIUM WASTE IN AN APPROVED CONTAINER. TITANIUM DUST IS EXTREMELY FLAMMABLE.
WARNING:
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 72-21-00-210-076-A A. Do the count of the number of airfoils that are blended.
(1) Make sure that a maximum of 6 vanes are blended for all the stage.
(a) If there are already 6 blended vanes, then the part is not repairable.
(b) If there are less than 6 blended blades, then the part is repairable, but make sure not to exceed 6 blended vanes.
Subtask 72-21-00-220-065-A (1) Make sure that a maximum of 6 vanes are blended for all the stage.
(a) If there are already 6 blended vanes, then the part is not repairable.
(b) If there are less than 6 blended blades, then the part is repairable, but make sure not to exceed 6 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 the LE and compare with repair limits.
Table 1 - Dimensional Limits
(2) If the damage or repair area is more than the limits, the part is not repairable by this procedure.
Subtask 72-21-00-320-069-A (1) Make sure you compare the dimensions and location of defects on the LE and compare with repair limits.
Table 1 - Dimensional Limits
| DESCRIPTION | MINIMUM IN-PROCESS DIMENSION | MAXIMUM IN-PROCESS DIMENSION | MINIMUM FINISH DIMENSION | MAXIMUM FINISH DIMENSION | REFERENCE DIMENSION |
|---|---|---|---|---|---|
| 1.Definition of critical area (Area A and Area D) | |||||
| Dimension K | - | - | - | - | 10 mm (0.39 in.) |
| Dimension S | - | - | - | - | 24 mm (0.94 in.) |
| Dimension Z | - | - | - | - | 1.0 mm (0.039 in.) |
| 2.Blending limits of LE (Area B) | |||||
| Dimension P | - | - | - | 1.0 mm (0.039 in.) | - |
| Cumulative length of the blend repairs (per airfoil) | - | 10 mm (0.39 in.) | - | ||
| 3.Blend repair proportion on LE | |||||
| Radius R | - | - | 5 x Dimension P | - | - |
| Radius r | - | - | 2 x Dimension P | - | - |
| Dimension L | - | - | 6 x Dimension P | - | - |
C. Hand Blend Repair (Alternative Procedure Available)
CP2721 abrasive cloth, silicon carbide SPM 704111 .
(a) Make sure that the contour and thickness of the LE and/or Trailing Edge (TE) must be at least similar to their initial value.
(b) Remove a minimum of 0.025 mm (0.0010 in.) of base metal in addition to depth of the defect.
Subtask 72-21-00-320-070-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:
USE ONLY SILICON CARBIDE TYPE WHEELS, STONES OR ABRASIVE PAPERS FOR THIS REPAIR.
(1) Do the hand blending with a FILE - SMOOTH or strips of (a) Make sure that the contour and thickness of the LE and/or Trailing Edge (TE) must be at least similar to their initial value.
(b) Remove a minimum of 0.025 mm (0.0010 in.) of base metal in addition to depth of the defect.
NOTE: Make sure that you do not blend more than the permitted limits (do not exceed Dimension P).
(c) When the distance D between 2 blend repairs is less than or equal to 2 times the most important depth of the repair, blend the bottom of the 2 repairs tangentially.NOTE: You can do this on the LE and/or TE.
D. Power Blend Repair (Alternative Procedure)
SPM 704112 .
(a) Make sure that the contour and thickness of the LE and/or TE must be at least similar to their initial value.
(b) Remove a minimum of 0.025 mm (0.0010 in.) of base metal in addition to depth of the defect.
Subtask 72-21-00-230-060-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:
USE ONLY SILICON CARBIDE TYPE WHEELS, STONES OR ABRASIVE PAPERS FOR THIS REPAIR.
(1) Do the power blending (a) Make sure that the contour and thickness of the LE and/or TE must be at least similar to their initial value.
(b) Remove a minimum of 0.025 mm (0.0010 in.) of base metal in addition to depth of the defect.
NOTE: Make sure that you do not blend more than the permitted limits (do not exceed Dimension P).
(c) When the distance D between 2 blend repairs is less than or equal to 2 times the most important depth of the repair, blend the bottom of the 2 repairs tangentially.NOTE: You can do this on the LE and/or TE.
E. Fluorescent Penetrant Inspection (FPI) on the Reworked Area
(1) Do a high sensitivity, level 3, FPI on the reworked area (Ref. AMM TASK 70-25-00-910-802).
(a) Make sure that there are no cracks.
5. Close-up(1) Do a high sensitivity, level 3, FPI on the reworked area (Ref. AMM TASK 70-25-00-910-802).
(a) Make sure that there are no cracks.
Subtask 72-21-00-410-085-A
A. Close Access
(1) Install the stage 1 IGV (Ref. AMM TASK 72-21-21-400-801).
(2) Install the flow splitter (Ref. AMM TASK 72-21-02-400-802).
(3) Install the rotating ring spacer (Ref. AMM D/O 72-21-25-40).
(4) Install the fan rotor blades (Ref. AMM TASK 72-21-20-400-801).
Subtask 72-21-00-410-086-A (1) Install the stage 1 IGV (Ref. AMM TASK 72-21-21-400-801).
(2) Install the flow splitter (Ref. AMM TASK 72-21-02-400-802).
(3) Install the rotating ring spacer (Ref. AMM D/O 72-21-25-40).
(4) Install the fan rotor blades (Ref. AMM TASK 72-21-20-400-801).
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the 956A7616 MAT, PROTECTION - INLET COWL from the inlet cowl.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the 956A7616 MAT, PROTECTION - INLET COWL from the inlet cowl.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).