DOC AIRBUS | AMM A320FRepair the Fan Case Rubstrip [PW11]
TASK 72-21-01-300-802-A
Repair the Fan Case Rubstrip
Use this repair procedure to fill repair localized damage on the fan case rub strip.
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 72-21-01-941-062-A ** ON A/C NOT FOR ALL
Subtask 72-21-01-942-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:48:32 UTC
Repair the Fan Case Rubstrip
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 400
1. Reason for the JobUse this repair procedure to fill repair localized damage on the fan case rub strip.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ABRASIVE PAPER - 80 GRIT |
| No specific | 1 | ABRASIVE PAPER -120 GRIT |
| No specific | 1 | BRUSH - BRISTLED |
| No specific | 1 | GUN - HOT AIR |
| No specific | 1 | KNIFE - PUTTY |
| No specific | 1 | MAT - PROTECTIVE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.P05-076) | abrasive paper, silicon carbide waterproof |
| (Material No.P05-146) | abrasive paper, silicon carbide |
| (Material No.P05-253) | paper, abrasive |
| (Material No.P05-274) | paper, abrasive |
| (Material No.P08-002) | liquid epoxy resin |
| (Material No.P08-012) | epoxy resin curing agent (amine type) |
| (Material No.P08-030) | epoxy potting compound (two component type) |
| (Material No.P08-036) | resin and curing agent, liquid epoxy |
| (Material No.P11-065) | acetone |
| (Material No.P11-078) | alcohol, isopropyl |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-27-00-910-804-A | SPOP 208 - Degreasing of Parts by Solvent Wiping |
| TASK 71-00-00-860-833-A | Procedure to Prevent Engine Motoring |
| TASK 72-11-03-000-801-A | Removal of the Fan Blades |
| TASK 72-11-03-400-801-A | Installation of the Fan Blades |
Fan Case Rubstrip RepairSubtask 72-21-01-941-062-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
4. Procedure(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
CAUTION:
WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
Subtask 72-21-01-350-050-A ** ON A/C NOT FOR ALL A. Repair the Fan Case Rubstrip
(1) Find the fan case rubstrip attached to the inner surface of the fan case.
(2) Install the MAT - PROTECTIVE in the air intake cowl and the fan case inner surfaces.
(3) If you cannot get access to the repair area, remove the minimum number of fan blades as necessary to do the repair (Ref. AMM TASK 72-11-03-000-801).
(4) Clean the repair area withP11-078 alcohol, isopropyl
(5) Prepare the repair area as follows:
(a) Remove the loose or damaged rubstrip material. The cut face must be smooth.
(b) Remove only the minimum quantity of material necessary to remove the damaged area and to make sure that you cannot see the bond layer between the rubstrip material and the septum.
(c) Rout out any cracks in the rubstrip and remove only the minimum quantity of material to make sure that you cannot see the bond layer and septum.
(6) Inspect the repair area as follows:
(a) Visually examine the area to make sure that the septum cannot be seen.
(b) Visually examine for cracks in the bond layer between the rubstrip material and the septum.
(c) Visually examine the area to make sure that you cannot see the bond layer between the rubstrip material and the septum.
(d) If the damage is more than the limits specified in steps 4.A.(6)(a), 4.A.(6)(b) and 4.A.(6)(c), replace the thermal conform layer.
(e) If additional damage is found along the trailing edge of the rubstrip, and extends into the aft RTV seal, contact Pratt & Whitney.
(7) Clean the repair area withP11-078 alcohol, isopropyl
(8) Remove the discolored material, burrs and surface dirt with theP05-146 abrasive paper, silicon carbide P05-253 paper, abrasive P05-274 paper, abrasive
(9) Vacuum or brush the surface to remove debris.
(10) Clean the repair area withP11-078 alcohol, isopropyl
(a) Let the repair area dry for a minimum of ten minutes.
(11) Mix the sealing mixture 100 parts by weight of liquid epoxy resin (Material No.P08-002) to 25 parts by weight ofP08-012 epoxy resin curing agent (amine type)
(a) It is permitted to useP08-036 resin and curing agent, liquid epoxy
(b) You must apply the sealing mixture in less than 15 minutes after it is mixed.
(c) You must limit the amount of sealing mixture (if cartridges are not used) to 7.05 oz (199.86 g) to prevent too much exotherming (heat build up).
(d) If the repair area is next to a wear depth measurement hole, do not fill the hole with sealing mixture.
(12) Apply a thin layer of the sealing mixture onto the repair area with the BRUSH - BRISTLED.
(a) It is permitted to useP11-078 alcohol, isopropyl
(13) Let the sealing mixture cure at room temperature until it is tacky and does not sag.
(a) Use theP05-076 abrasive paper, silicon carbide waterproof P05-274 paper, abrasive
(b) Clean the repair area withP11-078 alcohol, isopropyl
(c) Let the repair area dry for a minimum of ten minutes.
(15) Measure theP08-030 epoxy potting compound (two component type)
(a) You must apply the sealing mixture in less than 15 minutes after it is mixed.
(16) Apply the sealing mixture with the KNIFE - PUTTY or other equivalent tool.
(a) Repair the rubstrip to the initial height or to a maximum of 0.040 in. (1.02 mm) above the adjacent rubstrip surfaces.
(b) Use a clean, warm tool to remove unwanted sealing mixture from the repaired areas.
(17) Cure the applied sealing mixture with one of the procedures that follow:
(a) Cure the applied sealing mixture for a minimum of 16 hours at room temperature.
(18) When the sealing mixture becomes hard, make it smooth to the adjacent contour as follows:
(a) Make the filler surface smooth and flush with the adjacent flowpath surfaces with the ABRASIVE PAPER -120 GRIT,P05-253 paper, abrasive P05-274 paper, abrasive
(b) The repair surface can be a maximum of 0.040 in. (1.02 mm) above the adjacent rubstrip surface.
(c) The transition from the repaired surface to the adjacent surface must be smooth and continuous.
(19) Install the fan blades as necessary (Ref. AMM TASK 72-11-03-400-801).
(20) Remove the MAT - PROTECTIVE.
(21) Examine the assembly for foreign object, damage and correct assembly.
5. Close-up(1) Find the fan case rubstrip attached to the inner surface of the fan case.
(2) Install the MAT - PROTECTIVE in the air intake cowl and the fan case inner surfaces.
(3) If you cannot get access to the repair area, remove the minimum number of fan blades as necessary to do the repair (Ref. AMM TASK 72-11-03-000-801).
(4) Clean the repair area with
(5) Prepare the repair area as follows:
(a) Remove the loose or damaged rubstrip material. The cut face must be smooth.
(b) Remove only the minimum quantity of material necessary to remove the damaged area and to make sure that you cannot see the bond layer between the rubstrip material and the septum.
(c) Rout out any cracks in the rubstrip and remove only the minimum quantity of material to make sure that you cannot see the bond layer and septum.
(6) Inspect the repair area as follows:
(a) Visually examine the area to make sure that the septum cannot be seen.
(b) Visually examine for cracks in the bond layer between the rubstrip material and the septum.
(c) Visually examine the area to make sure that you cannot see the bond layer between the rubstrip material and the septum.
(d) If the damage is more than the limits specified in steps 4.A.(6)(a), 4.A.(6)(b) and 4.A.(6)(c), replace the thermal conform layer.
(e) If additional damage is found along the trailing edge of the rubstrip, and extends into the aft RTV seal, contact Pratt & Whitney.
(7) Clean the repair area with
(8) Remove the discolored material, burrs and surface dirt with the
(9) Vacuum or brush the surface to remove debris.
(10) Clean the repair area with
(a) Let the repair area dry for a minimum of ten minutes.
(11) Mix the sealing mixture 100 parts by weight of liquid epoxy resin (Material No.P08-002) to 25 parts by weight of
(a) It is permitted to use
(b) You must apply the sealing mixture in less than 15 minutes after it is mixed.
(c) You must limit the amount of sealing mixture (if cartridges are not used) to 7.05 oz (199.86 g) to prevent too much exotherming (heat build up).
(d) If the repair area is next to a wear depth measurement hole, do not fill the hole with sealing mixture.
(12) Apply a thin layer of the sealing mixture onto the repair area with the BRUSH - BRISTLED.
(a) It is permitted to use
(13) Let the sealing mixture cure at room temperature until it is tacky and does not sag.
WARNING:
BE CAREFUL WHEN YOU USE A HEATER TO ASSEMBLE PARTS. USE GLOVES WHEN YOU TOUCH OR LIFT THE HEATER OR THE PARTS. THE HEATER OR THE PARTS CAN BE HOT AND CAUSE BURNS. IF YOU DO NOT OBEY THIS PRECAUTION, INJURY TO PERSONNEL CAN OCCUR.
(a) Use the GUN - HOT AIR set to a maximum of 200 deg.F (93.33 deg.C) to cure the sealing mixture quickly, if necessary.NOTE: Too much heat can make the mixture not tacky in a short amount of time.
(14) If the sealing mixture is not tacky, do the steps that follow:(a) Use the
(b) Clean the repair area with
(c) Let the repair area dry for a minimum of ten minutes.
(15) Measure the
(a) You must apply the sealing mixture in less than 15 minutes after it is mixed.
(16) Apply the sealing mixture with the KNIFE - PUTTY or other equivalent tool.
(a) Repair the rubstrip to the initial height or to a maximum of 0.040 in. (1.02 mm) above the adjacent rubstrip surfaces.
(b) Use a clean, warm tool to remove unwanted sealing mixture from the repaired areas.
(17) Cure the applied sealing mixture with one of the procedures that follow:
(a) Cure the applied sealing mixture for a minimum of 16 hours at room temperature.
WARNING:
BE CAREFUL WHEN YOU USE A HEATER TO ASSEMBLE PARTS. USE GLOVES WHEN YOU TOUCH OR LIFT THE HEATER OR THE PARTS. THE HEATER OR THE PARTS CAN BE HOT AND CAUSE BURNS. IF YOU DO NOT OBEY THIS PRECAUTION, INJURY TO PERSONNEL CAN OCCUR.
(b) Cure the applied sealing mixture for two hours in an oven set between 135 deg.F (57.22 deg.C) and 165 deg.F (73.89 deg.C).(18) When the sealing mixture becomes hard, make it smooth to the adjacent contour as follows:
(a) Make the filler surface smooth and flush with the adjacent flowpath surfaces with the ABRASIVE PAPER -120 GRIT,
(b) The repair surface can be a maximum of 0.040 in. (1.02 mm) above the adjacent rubstrip surface.
(c) The transition from the repaired surface to the adjacent surface must be smooth and continuous.
(19) Install the fan blades as necessary (Ref. AMM TASK 72-11-03-400-801).
(20) Remove the MAT - PROTECTIVE.
(21) Examine the assembly for foreign object, damage and correct assembly.
Subtask 72-21-01-942-050-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).