DOC AIRBUS | AMM A320FRepair of the Fan Case Attrition Lining Down to the GRC Layer - VRS1825 [IAE]
TASK 72-32-85-350-018-A
Repair of the Fan Case Attrition Lining Down to the GRC Layer - VRS1825
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 72-32-85-941-089-A ** ON A/C NOT FOR ALL
Subtask 72-32-85-350-100-A ** ON A/C NOT FOR ALL
Subtask 72-32-85-942-078-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:01:05 UTC
Repair of the Fan Case Attrition Lining Down to the GRC Layer - VRS1825
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 | AR | ACCESS PLATFORM 1M(3 FT) |
| No specific | AR | FILM - POLYETHYLENE |
| No specific | AR | GUN - SEALANT |
| No specific | AR | KNIFE - PUTTY |
| No specific | AR | MAT - WORK |
| No specific | AR | SCRAPER |
| No specific | AR | VACUUM CLEANER |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-076) | Methyl Ethyl Ketone, Technical grade |
| (Material No.V02-005) | adhesive tape |
| (Material No.V05-016) | garnet paper |
| (Material No.V08-006) | filler, two pack |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 72-31-00-000-010-B | Removal of the LP Compressor (Fan) Module |
| TASK 72-31-00-400-010-B | Installation of the LP Compressor (Fan) Module |
| TASK 72-31-11-000-010-B | Removal of the LP Compressor Fan Blades |
| TASK 72-31-11-400-010-C | Installation of the LP Compressor Fan Blades |
| TASK 72-32-85-300-022-A | Repair by Replacement of the Attrition Linings - VRS1843 |
| TASK 72-32-85-350-042-A | Repair of the Fan Case Attrition Lining Below the Glass Reinforced Composite (GRC) Layer - VRS1946 |
Filler Repair of the Attrition LiningSubtask 72-32-85-941-089-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).
Subtask 72-32-85-010-079-A ** ON A/C NOT FOR ALL (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).
B. Remove a sufficient number of LP compressor blades and fillers to get access to the repair area (Ref. AMM TASK 72-31-00-000-010) or (Ref. AMM TASK 72-31-11-000-010).
Subtask 72-32-85-941-090-A ** ON A/C NOT FOR ALL C. Put the Ground Support Equipment in Position
(1) Put the ACCESS PLATFORM 1M(3 FT) in position to give access to the engine.
(2) Put the MAT - WORK in position in the fan case.
4. Procedure(1) Put the ACCESS PLATFORM 1M(3 FT) in position to give access to the engine.
(2) Put the MAT - WORK in position in the fan case.
NOTE: Make sure that the red warning pennants of the workmat can be seen externally.
NOTE: Make sure that the workmat has sufficient dimensions to give full protection to the lower half of the fan case.
Subtask 72-32-85-350-100-A ** ON A/C NOT FOR ALL
A. Prepare areas of damage
(1) Use adhesive tape (Material No.V02-005) and FILM - POLYETHYLENE or equivalent to protect the engine opening.
Subtask 72-32-85-350-064-A ** ON A/C NOT FOR ALL (1) Use adhesive tape (Material No.V02-005) and FILM - POLYETHYLENE or equivalent to protect the engine opening.
NOTE: Make sure that the masking sheet has sufficient dimensions to give full protection to the inlet of the LPC guide vane assembly, outlet of the stage 2.5 bleed duct and inside of the LP stub shaft.
B. Prepare the Repair Area
(3) Do a check of the panels adjacent to the repair area for satisfactory bonds.
(a) Visually examine and tap the panels. A hollow sound is an indication of an unsatisfactory bond.
(b) Remove more material until you have removed all areas of unsatisfactory bond. Be careful not to cause damage to the inner surface of the fan case assembly.
(c) If the damage has got to the GRC layer or below the GRC layer, do the following procedures.
(5) Use a VACUUM CLEANER to remove all remaining unwanted material.
(6) Degrease the repair area.
(a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist withV01-076 Methyl Ethyl Ketone, Technical grade
(7) Immediately dry the repair area with a clean dry blast.
Subtask 72-32-85-340-111-A ** ON A/C NOT FOR ALL CAUTION:
THE FAN CASE IS MADE FROM TITANIUM ALLOY AND IS THIN IN SOME AREAS. IF YOU HIT THE FAN CASE WITH A CHISEL OR SCRAPER YOU CAN MAKE IT UNSERVICEABLE.
CAUTION:
YOU MUST USE THE CHISEL, SHARP BLADE OR SCRAPER IN A CIRCUMFERENTIAL DIRECTION TO PREVENT THE EDGES OF THE BLADE SCORING THE FAN CASE.
CAUTION:
STOP MACHINING AS SOON AS THE FILES, CUTTERS OR MACHINING BITS ARE THROUGH THE LINING MATERIAL. USE A STOP-MACHINING OR SLEEVE OR OTHER PENETRATION LIMITING DEVICE TO PREVENT DAMAGE TO THE CASING MATERIAL.
CAUTION:
DO NOT USE POWERED TOOLS WITH STEEL CHISEL OR SIMILAR BITS.
CAUTION:
YOU MUST ALWAYS TRY TO POINT THE CHISEL OR SHARP BLADE PARALLEL WITH THE SURFACE OF THE FAN CASE.
CAUTION:
DO NOT OPERATE WITHOUT SAFETY GOGGLES AND OTHER GUARD EQUIPMENT. FLYING PARTICLES CAN CAUSE INJURY.
(1) Use a SCRAPER to remove all loose and damaged material from the repair area. Be careful not to cause damage to the inner surface of the fan case assembly. NOTE: Remove the minimum quantity of material necessary to remove all damage.
(2) Take care not to cause damage to the Glass Reinforced Composite (GRC) layer which is between the two layers of honeycomb in this area. (3) Do a check of the panels adjacent to the repair area for satisfactory bonds.
(a) Visually examine and tap the panels. A hollow sound is an indication of an unsatisfactory bond.
(b) Remove more material until you have removed all areas of unsatisfactory bond. Be careful not to cause damage to the inner surface of the fan case assembly.
(c) If the damage has got to the GRC layer or below the GRC layer, do the following procedures.
- if the damaged area is less than 20 percent of each attrition lining, repair it (Ref. AMM TASK 72-32-85-350-042)
- if the damaged area is more than 20 percent of each attrition lining, repair it (Ref. AMM TASK 72-32-85-300-022)
NOTE: These repair limits must be applied to the full depth of the GRC layer.
(4) Use garnet paper (Material No.V05-016) to make the repair area rough. (5) Use a VACUUM CLEANER to remove all remaining unwanted material.
(6) Degrease the repair area.
(a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with
(7) Immediately dry the repair area with a clean dry blast.
C. Prepare the Filler Material
V08-006 filler, two pack
(2) Knead the two parts together until the paste is a constant blue color. No streaks are permitted.
Subtask 72-32-85-340-112-A ** ON A/C NOT FOR ALL WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(1) Use (2) Knead the two parts together until the paste is a constant blue color. No streaks are permitted.
NOTE: When mixed the life of the filler is approximately one hour at 72 deg.F (22 deg.C).
D. Apply the Filler Material
(1) Use the GUN - SEALANT to put the filler into the repair area to slightly more than the necessary level.
(2) Make sure that the repair area is fully filled without air pockets.
(3) The gradual setting of the filler will support the newly applied filler.
(4) If sagging is apparent, locally produced supports will be necessary.
(5) When the filler starts to feel hard, remove all unwanted filler.
(6) Use the KNIFE - PUTTY or a SCRAPER to get a burnished effect.
(7) If necessary, apply a small quantity of cold water to the putty knife to get a smooth finish.
(10) Remove all unwanted material with a VACUUM CLEANER.
Subtask 72-32-85-210-092-A ** ON A/C NOT FOR ALL (1) Use the GUN - SEALANT to put the filler into the repair area to slightly more than the necessary level.
(2) Make sure that the repair area is fully filled without air pockets.
(3) The gradual setting of the filler will support the newly applied filler.
(4) If sagging is apparent, locally produced supports will be necessary.
(5) When the filler starts to feel hard, remove all unwanted filler.
(6) Use the KNIFE - PUTTY or a SCRAPER to get a burnished effect.
(7) If necessary, apply a small quantity of cold water to the putty knife to get a smooth finish.
NOTE: Do not use too much water because it will cause the filler to plasticize.
CAUTION:
THE MAXIMUM TEMPERATURE WHICH CAN BE USED TO CURE THE FILLER IS 176 DEG.F (80 DEG.C)
(8) Curing of the filler. The cure times are given in figure "Curing Chart of Filling Material (V08-006)" NOTE: The minimum cure time is one hour.
NOTE: The filler will not cure at a temperature of less than 54 deg.F (12 deg.C).
(9) Use garnet paper (Material No.V05-016) to blend the filler to the correct contour. (10) Remove all unwanted material with a VACUUM CLEANER.
E. Examine the Surface of the Repaired Area
(1) Make sure that the surface of the filler is smooth and flat.
(2) Accept a step if it is less than 0.020 in. (0.5 mm).
(3) If necessary, apply more filler.
5. Close-up(1) Make sure that the surface of the filler is smooth and flat.
(2) Accept a step if it is less than 0.020 in. (0.5 mm).
(3) If necessary, apply more filler.
Subtask 72-32-85-942-078-A ** ON A/C NOT FOR ALL
A. Remove the Ground Support Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the workmat from the fan case.
(3) Remove the access platform(s).
Subtask 72-32-85-410-080-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the workmat from the fan case.
(3) Remove the access platform(s).
B. Install the LP compressor blades and fillers (Ref. AMM TASK 72-31-00-400-010) or (Ref. AMM TASK 72-31-11-400-010).
Subtask 72-32-85-942-079-A ** ON A/C NOT FOR ALL C. Remove the WARNING NOTICE(S).