DOC AIRBUS | AMM A320FBlend Repair of Stage-2 Booster-Vane Assembly (PRE SB 72-0080) [CFML]
TASK 72-21-00-300-804-A
Blend Repair of Stage-2 Booster-Vane Assembly (PRE 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 72-21-00-941-099-A
Subtask 72-21-00-410-075-A
[Rev.10 from 2021]
2026.04.01 02:51:24 UTC
Blend Repair of Stage-2 Booster-Vane Assembly (PRE 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.
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 | MAT - PROTECTIVE |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2721) | CS 333 X |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| 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) |
| SPM 703224 | |
| SPM 704111 | |
| SPM 704112 | |
Blend Repair of Stage-2 Booster-Vane Assembly (PRE SB 72-0080)Subtask 72-21-00-941-099-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 MAT - PROTECTIVE in the lower half of the inlet cowl.
Subtask 72-21-00-010-077-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 MAT - PROTECTIVE in the lower half of the inlet cowl.
B. Get Access
(1) Remove the fan rotor blades (Ref. AMM TASK 72-21-20-000-801).
(3) Remove the stage-1-booster inlet guide-vane (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 flow splitter (Ref. AMM TASK 72-21-02-000-802). (3) Remove the stage-1-booster inlet guide-vane (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 USE TOOLS OR CONSUMABLE PRODUCTS THAT WERE USED TO BLEND MATERIALS OTHER THAN TITANIUM, BECAUSE TITANIUM IS EASILY CONTAMINATED.
Subtask 72-21-00-210-074-A A. Do the count of the number of the blended vanes:
(1) Make sure that a maximum of 6 vanes are blended for stage 2.
(a) If there are six or more blended vanes, then the part is not repairable.
(b) If there are less than six blended blades, then the part is repairable.
1 Make sure not to exceed six blended vanes.
Subtask 72-21-00-220-061-A (1) Make sure that a maximum of 6 vanes are blended for stage 2.
(a) If there are six or more blended vanes, then the part is not repairable.
(b) If there are less than six blended blades, then the part is repairable.
1 Make sure not to exceed six blended vanes.
B. Do a check for dimensions and location of defects on the leading edge:
(1) Make sure you compare the dimensions and location of defects on the leading edge with repair limits.
Table 1 - Dimensional Limits
(2) If the damage or repair area is more than the limits, the part is not repairable.
Subtask 72-21-00-320-058-A (1) Make sure you compare the dimensions and location of defects on the leading edge with repair limits.
NOTE: The dimensional data identified within this procedure was designed using millimeters as the base unit of measurement for dimensional values. The conversion to inches is rounded to two additional decimal digits than millimeters. For minimum dimensions, converted values are rounded up. For maximum dimensions, converted values are rounded down. To avoid conversion errors, do not re-convert from inches to millimeters.
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 | - | - | - | - | 30 mm (1.18 in.) |
| 2.Blending limits of leading edge (area B) | |||||
| Dimension P | - | - | - | 1.00 mm (0.039 in.) | - |
| Cumulative length of the blend repairs (per airfoil) | - | - | - | 10 mm (0.39 in.) | - |
| 3.Blend repair proportion on leading edge | |||||
| Radius R | - | - | Dimension P multiplied by five (Dim. P x 5) | - | - |
| Radius r | - | - | Dimension P multiplied by two (Dim. P x 2) | - | - |
| Dimension L | - | - | Dimension P multiplied by six (Dim. P x 6) | - | - |
C. Hand Blend Repair (Alternative Procedure Available)
(a) Make sure the leading edge radius of the area that you repaired conforms with the initial contour.
(b) Remove a minimum of 0.025 mm (0.0010 in.) of base metal in addition to depth of the defect.
Subtask 72-21-00-320-059-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 CS 333 X (Material No.CP2721) SPM 704111. (a) Make sure the leading edge radius of the area that you repaired conforms with the initial contour.
(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).
D. Power Blend Repair (Alternative Procedure)
(a) Make sure the leading edge radius of the area that you repaired conforms with the initial contour.
(b) Remove a minimum of 0.025 mm (0.0010 in.) of base metal in addition to depth of the defect.
Subtask 72-21-00-230-056-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 SPM 704112. (a) Make sure the leading edge radius of the area that you repaired conforms with the initial contour.
(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).
E. Penetrant Inspection of the Reworked Area
(1) Do a high sensitivity, level 3, fluorescent-penetrant inspection on the reworked area SPM 703224.
(a) Make sure that there are no cracks.
5. Close-up(1) Do a high sensitivity, level 3, fluorescent-penetrant inspection on the reworked area SPM 703224.
(a) Make sure that there are no cracks.
Subtask 72-21-00-410-075-A
A. Close Access
(1) Install the stage-1 inlet guide-vane (Ref. AMM TASK 72-21-21-400-801).
(2) Install the flow splitter (Ref. AMM TASK 72-21-02-400-802).
(3) Install the fan rotor blades (Ref. AMM TASK 72-21-20-400-801).
Subtask 72-21-00-410-076-A (1) Install the stage-1 inlet guide-vane (Ref. AMM TASK 72-21-21-400-801).
(2) Install the flow splitter (Ref. AMM TASK 72-21-02-400-802).
(3) 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 MAT - PROTECTIVE from the lower half of 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 MAT - PROTECTIVE from the lower half of the inlet cowl.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).