DOC AIRBUS | AMM A320FAdhesion Acceptance Test of the Fan Blade Coat at Leading-Edge Sheath Interface (Manual Test) [PW11]
TASK 72-11-03-700-801-A
Adhesion Acceptance Test of the Fan Blade Coat at Leading-Edge Sheath Interface (Manual Test)
Use this procedure to do a test of the adhesion of the fan blade erosion-coat (patch repaired) at the leading-edge sheath interface.
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 72-11-03-941-068-A ** ON A/C NOT FOR ALL
Subtask 72-11-03-750-050-A ** ON A/C NOT FOR ALL
Subtask 72-11-03-942-059-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:47:51 UTC
Adhesion Acceptance Test of the Fan Blade Coat at Leading-Edge Sheath Interface (Manual Test)
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS 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.
WARNING:
USE PROTECTIVE GLOVES TO PREVENT POSSIBLE INJURY TO THE HANDS WHEN YOU TOUCH OR HOLD THE FAN BLADES. THE BLADE EDGES ARE SHARP AND CAN CUT THE HANDS.
CAUTION:
DO NOT USE MATERIALS OR TOOLING THAT CONTAIN SILICONE. IF YOU DO NOT OBEY THIS CAUTION, DAMAGE TO THE FAN BLADE CAN OCCUR.
ZONE: 400
1. Reason for the JobUse this procedure to do a test of the adhesion of the fan blade erosion-coat (patch repaired) at the leading-edge sheath interface.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | AIR SOURCE 1.7 TO 2 BAR (25 TO 30 PSI) - FILTERED, DRY |
| No specific | 1 | BAG - PLASTIC |
| No specific | 1 | FLASHLIGHT |
| No specific | 1 | MAT - PROTECTIVE |
| No specific | 1 | ROLLER TOOL |
| No specific | 1 | SCISSORS |
| 636-1100-3GSE | 1 | INLET COWL PROTECT COVER |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.P05-548) | tape, duct-polymer-based pressure sensitive adhesive, 1-7/8 inch |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-27-00-910-810-A | PWA 83 - Cleaning of Parts Before Adhesive Bonding, Sealing or Filling |
| TASK 71-00-00-860-833-A | Procedure to Prevent Engine Motoring |
| TASK 72-11-03-220-803-A | Detailed Visual Inspection of the Fan Blades |
Subtask 72-11-03-941-068-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(2) Put the 636-1100-3GSE INLET COWL PROTECT COVER or equivalent and the MAT - PROTECTIVE on the engine intake cowl and fan case to protect the inner surfaces.
4. ProcedureCAUTION:
REMOVE AND INSTALL PROTECTION COVERS AS NECESSARY TO PREVENT DAMAGE TO THE ENGINE AND ADJACENT COMPONENTS.
CAUTION:
WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
(1) Do the procedure to prevent engine motoring (Ref. AMM TASK 71-00-00-860-833).(2) Put the 636-1100-3GSE INLET COWL PROTECT COVER or equivalent and the MAT - PROTECTIVE on the engine intake cowl and fan case to protect the inner surfaces.
Subtask 72-11-03-750-050-A ** ON A/C NOT FOR ALL
A. Adhesion Acceptance Test of the Fan Blade Coat at Leading-Edge Sheath Interface (Manual Test)
(a) Air dry for a minimum of five minutes.
(2) Apply theP05-548 tape, duct-polymer-based pressure sensitive adhesive, 1-7/8 inch
Adhesion Acceptance Test of the Fan Blade Coat at Leading-Edge Sheath Interface (Manual Test) - Tape Locations ** ON A/C NOT FOR ALL
(b) You must apply the tape to cover the sheath from the erosion coat interface.
(c) For a new roll of tape, you must remove two full wraps of the tape from the roll and discard them.
1 Fold over 1 in. (25.4 mm) so that the sticky side of the tape bonds to itself to make a pull−tab.
2 The pull-tab must hang past the leading edge of the blade.
(e) Apply the strip of the tape directly to the surface of the blade at the test location in one minute after you remove the roll.
1 Tape must be perpendicular to the erosion coat to sheath interface edge.
(f) Put the remaining roll of tape in the clean BAG - PLASTIC for storage.
(3) Roll the tape smooth.
(a) Move the ROLLER TOOL (2 in. (50.8 mm) - 2.5 in. (63.5 mm) length) − wood, rubber or plastic across the surface of the tape a minimum of 30 times
Adhesion Acceptance Test of the Fan Blade Coat at Leading-Edge Sheath Interface (Manual Test) - Typical Roller ** ON A/C NOT FOR ALL
(b) Wait for a minimum of 15 minutes before you pull the tape.
1 Use the ROLLER TOOL (2 in. (50.8 mm) - 2.5 in. (63.5 mm) length) − wood, rubber or plastic to make sure that the tape is applied smoothly and correctly.
(c) Use the ROLLER TOOL (2 in. (50.8 mm) - 2.5 in. (63.5 mm) length) − wood, rubber or plastic to make sure that the tape is applied smoothly and correctly.
(4) Pull the tape by hand at slow to moderate speed parallel to the surface.
(a) Fast pulling of the tape is not permitted.
1 The minimum time to remove 6 in. (152.4 mm) of tape and 1 in. (25.4 mm) tab is six seconds.
(5) Use the FLASHLIGHT during and after you pull the tape to examine coat edge for raised condition.
(a) Typical raised condition is shown by green primer below the surface of black erosion coat.
(b) Use the AIR SOURCE 1.7 TO 2 BAR (25 TO 30 PSI) - FILTERED, DRY at the discharge end of the standard nozzle.
(c) Point the air nozzle in the direction of the sheath or the coat interface from the leading edge to the trailing edge at an angle of approximately 45 degrees from the blade face.
(d) Use the nozzle to spray compressed air along the radius through the full test area, when you look for signs of raised condition.
1 Visual indications of raised condition means the coat is damaged
(6) Do an analysis of the pull test results by the procedure that follows:
(a) The results are satisfactory, if there are no signs of coat delamination.
1 You can do the test again on the same location by step 4.A.(1) thru step 4.A.(5), if necessary.
a There are no limits to the number of tests you can do at each location.
(b) The results are unsatisfactory if there is coat delamination
Adhesion Acceptance Test of the Fan Blade Coat at Leading-Edge Sheath Interface (Manual Test) - Tape Locations ** ON A/C NOT FOR ALL
1 You can do the test again on the same location by step 4.A.(1) thru step 4.A.(5), if necessary.
a There are no limits to the number of tests you can do at each location.
(7) When you complete the adhesion acceptance test, clean the remaining tape from the blade by PWA 83−D2 (Ref. AMM TASK 70-27-00-910-810).
(8) Do a visual inspection of the fan blade (Ref. AMM TASK 72-11-03-220-803).
5. Close-upCAUTION:
DO NOT TOUCH THE CLEANED SURFACE BEFORE YOU DO THE TEST. IF YOU NOT OBEY THIS INSTRUCTION, DAMAGE TO THE SURFACE CAN OCCUR.
(1) Clean the blade by PWA 83-D2 (Ref. AMM TASK 70-27-00-910-810).(a) Air dry for a minimum of five minutes.
(2) Apply the
Adhesion Acceptance Test of the Fan Blade Coat at Leading-Edge Sheath Interface (Manual Test) - Tape Locations ** ON A/C NOT FOR ALL NOTE: This test procedure is necessary for erosion coat repairs adjacent to the leading edge sheath. It is permitted to do a test of other local erosion coat touch−up areas if necessary by the repair shop.
NOTE: The test of each blade is done one at a time.
(a) You must do an adhesion acceptance test on the full repaired area and on one of the sides in 0.5 in. (12.7 mm) of the repair area.(b) You must apply the tape to cover the sheath from the erosion coat interface.
(c) For a new roll of tape, you must remove two full wraps of the tape from the roll and discard them.
CAUTION:
DO NOT TRY TO CUT THE TAPE BY HAND. IF YOU NOT OBEY THIS INSTRUCTION, DAMAGE TO THE TAPE CAN OCCUR.
(d) Use the SCISSORS to cut a 7.5 in. (190.5 mm) - 8.5 in. (215.9 mm) length of the tape from the roll.1 Fold over 1 in. (25.4 mm) so that the sticky side of the tape bonds to itself to make a pull−tab.
2 The pull-tab must hang past the leading edge of the blade.
(e) Apply the strip of the tape directly to the surface of the blade at the test location in one minute after you remove the roll.
1 Tape must be perpendicular to the erosion coat to sheath interface edge.
(f) Put the remaining roll of tape in the clean BAG - PLASTIC for storage.
(3) Roll the tape smooth.
(a) Move the ROLLER TOOL (2 in. (50.8 mm) - 2.5 in. (63.5 mm) length) − wood, rubber or plastic across the surface of the tape a minimum of 30 times
Adhesion Acceptance Test of the Fan Blade Coat at Leading-Edge Sheath Interface (Manual Test) - Typical Roller ** ON A/C NOT FOR ALL 1 Use the ROLLER TOOL (2 in. (50.8 mm) - 2.5 in. (63.5 mm) length) − wood, rubber or plastic to make sure that the tape is applied smoothly and correctly.
(c) Use the ROLLER TOOL (2 in. (50.8 mm) - 2.5 in. (63.5 mm) length) − wood, rubber or plastic to make sure that the tape is applied smoothly and correctly.
(4) Pull the tape by hand at slow to moderate speed parallel to the surface.
(a) Fast pulling of the tape is not permitted.
1 The minimum time to remove 6 in. (152.4 mm) of tape and 1 in. (25.4 mm) tab is six seconds.
(5) Use the FLASHLIGHT during and after you pull the tape to examine coat edge for raised condition.
(a) Typical raised condition is shown by green primer below the surface of black erosion coat.
(b) Use the AIR SOURCE 1.7 TO 2 BAR (25 TO 30 PSI) - FILTERED, DRY at the discharge end of the standard nozzle.
(c) Point the air nozzle in the direction of the sheath or the coat interface from the leading edge to the trailing edge at an angle of approximately 45 degrees from the blade face.
(d) Use the nozzle to spray compressed air along the radius through the full test area, when you look for signs of raised condition.
1 Visual indications of raised condition means the coat is damaged
(6) Do an analysis of the pull test results by the procedure that follows:
(a) The results are satisfactory, if there are no signs of coat delamination.
1 You can do the test again on the same location by step 4.A.(1) thru step 4.A.(5), if necessary.
a There are no limits to the number of tests you can do at each location.
(b) The results are unsatisfactory if there is coat delamination
Adhesion Acceptance Test of the Fan Blade Coat at Leading-Edge Sheath Interface (Manual Test) - Tape Locations ** ON A/C NOT FOR ALL a There are no limits to the number of tests you can do at each location.
(7) When you complete the adhesion acceptance test, clean the remaining tape from the blade by PWA 83−D2 (Ref. AMM TASK 70-27-00-910-810).
(8) Do a visual inspection of the fan blade (Ref. AMM TASK 72-11-03-220-803).
Subtask 72-11-03-942-059-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 636-1100-3GSE INLET COWL PROTECT COVER or equivalent and the MAT - PROTECTIVE from the engine intake cowl and fan case.
(3) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the 636-1100-3GSE INLET COWL PROTECT COVER or equivalent and the MAT - PROTECTIVE from the engine intake cowl and fan case.
(3) Remove the WARNING NOTICE(S).