DOC AIRBUS | AMM A320FRepair of the Fan Case Attrition Lining Below the Glass Reinforced Composite (GRC) Layer - VRS1946 [IAE]
TASK 72-32-85-350-042-A
Repair of the Fan Case Attrition Lining Below the Glass Reinforced Composite (GRC) Layer - VRS1946
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 72-32-85-941-109-A ** ON A/C NOT FOR ALL
Subtask 72-32-85-350-094-A ** ON A/C NOT FOR ALL
Subtask 72-32-85-410-090-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:45:41 UTC
Repair of the Fan Case Attrition Lining Below the Glass Reinforced Composite (GRC) Layer - VRS1946
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
CHECK THE TOTAL REPAIR AREA PRIOR TO STARTING THE REPAIR. DO NOT CARRY OUT REPAIR BY FILLING THE ATTRITION LININGS IF THE TOTAL REPAIRED AREA EXCEEDS 20 PERCENT OF THE TOTAL FAN CASE ATTRITION LINING AREA. THESE REPAIR LIMITS MUST BE APPLIED TO THE FULL DEPTH OF THE GRC LAYER.
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 | BRUSH - WIRE, ROTARY |
| No specific | AR | FILM - POLYETHYLENE |
| No specific | AR | GUN - SEALANT |
| No specific | AR | KNIFE - PUTTY |
| No specific | AR | MACHINE - HAND GRINDING, PNEUMATIC |
| 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 72-32-85-300-042-A | Repair of the Fan Case - VRS1806 - Post SBE 72-0160 |
| TASK 72-32-85-350-015-A | Repair of the Fan Case - VRS1824 - PRE SBE 72-0160 |
Filling Repair of the Attrition LiningSubtask 72-32-85-941-109-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 72-32-85-010-117-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 72-32-85-941-110-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 72-32-85-350-094-A ** ON A/C NOT FOR ALL
A. Prepare the Damaged Areas
(1) Use adhesive tape (Material No.V02-005) and FILM - POLYETHYLENE or equivalent to protect the engine opening.
Subtask 72-32-85-350-069-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. Remove all Damage from the Defective Area
(3) Do a check of the GRC layer adjacent to the repair area for unsatisfactory bonds.
(a) Check visually and by tapping. A hollow sound is indicative of a suspect bond.
(b) Remove any unsound material. Be careful not to cause damage to the inner surface of the fan case assembly.
(c) Make sure that the repair area is not more than 20 percent of the attrition lining of one segment.
(d) If it is more than 20 percent, repair it (Ref. AMM TASK 72-32-85-300-022).
(a) Cut away the defective area with the MACHINE - HAND GRINDING, PNEUMATIC and the BRUSH - WIRE, ROTARY. Be careful not to cause damage to the inner surface of the fan case assembly.
(6) Remove all remaining unwanted material with a VACUUM CLEANER.
Subtask 72-32-85-110-054-A ** ON A/C NOT FOR ALL WARNING:
DO NOT OPERATE WITHOUT SAFETY GOGGLES AND OTHER GUARD EQUIPMENT. FLYING PARTICLES CAN CAUSE INJURY.
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.
(1) Remove all loose and damaged material from the repair area with a SCRAPER. 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 GRC layer which is between two layers of honeycomb in this area. (3) Do a check of the GRC layer adjacent to the repair area for unsatisfactory bonds.
(a) Check visually and by tapping. A hollow sound is indicative of a suspect bond.
(b) Remove any unsound material. Be careful not to cause damage to the inner surface of the fan case assembly.
(c) Make sure that the repair area is not more than 20 percent of the attrition lining of one segment.
(d) If it is more than 20 percent, 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) Cutting of the defective area: (a) Cut away the defective area with the MACHINE - HAND GRINDING, PNEUMATIC and the BRUSH - WIRE, ROTARY. 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.
(5) Make the repair area rough with the use of garnet paper (Material No.V05-016) . (6) Remove all remaining unwanted material with a VACUUM CLEANER.
C. Remove the Grease from the Repair Area
(1) Use the clean Textile-Lint free Cotton - (Material No.14SBA1) , made moist withV01-076 Methyl Ethyl Ketone, Technical grade
(2) Immediately dry the area with a clean, dry air blast.
Subtask 72-32-85-210-133-A ** ON A/C NOT FOR ALL (1) Use the clean Textile-Lint free Cotton - (Material No.14SBA1) , made moist with
(2) Immediately dry the area with a clean, dry air blast.
D. Examine the fan case inner surface of the repair area. If necessary repair any nicks, dents, scratches and gouges (Ref. AMM TASK 72-32-85-300-042) or (Ref. AMM TASK 72-32-85-350-015).
Subtask 72-32-85-340-151-A ** ON A/C NOT FOR ALL E. Prepare the Filler Material
V08-006 filler, two pack
(2) Mix the two parts together until the paste is a constant blue color. No streaks are permitted.
Subtask 72-32-85-340-152-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) Mix 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).
F. 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 and has no air pockets.
(3) The gradual setting of the filler will support the newly applied filler.
(4) If any sagging is apparent, locally produced supports will be necessary.
(5) When the filler starts to feel hard, remove unwanted filler.
(6) Use a KNIFE - PUTTY or a SCRAPER to get a burnished effect.
(7) If necessary, to get a smooth finish, apply a small quantity of cold water to the KNIFE - PUTTY to make it moist.
(10) Remove all unwanted material with a VACUUM CLEANER.
Subtask 72-32-85-210-107-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 and has no air pockets.
(3) The gradual setting of the filler will support the newly applied filler.
(4) If any sagging is apparent, locally produced supports will be necessary.
(5) When the filler starts to feel hard, remove unwanted filler.
(6) Use a KNIFE - PUTTY or a SCRAPER to get a burnished effect.
(7) If necessary, to get a smooth finish, apply a small quantity of cold water to the KNIFE - PUTTY to make it moist.
NOTE: Do not use too much water because it will cause the filler to plasticize.
(8) Curing of the filler: CAUTION:
THE MAXIMUM TEMPERATURE WHICH CAN BE USED TO CURE THE FILLER IS 176 DEG.F (80 DEG.C)
(a) Cure the filler. The cure time and temperature are given in figure "Curing Chart of the Filler Material". NOTE: The minimum cure time is one hour at 140 deg.F (60 deg.C).
NOTE: The filler will not cure at a temperature of less than 54 deg.F (12 deg.C).
(9) Blend the filler to the contour with garnet paper (Material No.V05-016) , if necessary. (10) Remove all unwanted material with a VACUUM CLEANER.
G. Examine the Surface of the Repaired Area
(1) Make sure that the surface of the filler is flat and smooth.
(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 flat and smooth.
(2) Accept a step if it is less than 0.020 in. (0.5 mm).
(3) If necessary, apply more filler.
Subtask 72-32-85-410-090-A ** ON A/C NOT FOR ALL
A. 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 72-32-85-942-092-A ** ON A/C NOT FOR ALL B. 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 72-32-85-942-093-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).
C. Remove the WARNING NOTICE(S).