DOC AIRBUS | AMM A320FFan Blades - Bonding of Labels (Full Repair of the Identification and MOMENTS WEIGHT Labels and Bonding of Cotton Labels) [CFML]
TASK 72-21-20-960-802-A
Fan Blades - Bonding of Labels (Full Repair of the Identification and MOMENTS WEIGHT Labels and Bonding of Cotton Labels)
This repair procedure gives instructions to replace the identification and/or MOMENTS WEIGHT labels.
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 72-21-20-940-051-A
Subtask 72-21-20-950-050-A
Subtask 72-21-20-410-056-A Subtask 72-21-20-942-058-A
[Rev.10 from 2021]
2026.04.01 13:03:53 UTC
Fan Blades - Bonding of Labels (Full Repair of the Identification and MOMENTS WEIGHT Labels and Bonding of Cotton Labels)
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 JobThis repair procedure gives instructions to replace the identification and/or MOMENTS WEIGHT labels.
NOTE: You can use equivalent alternatives for standard tools and equipment.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ABRASIVE PAPER - 240 GRIT (ANSI B74.18) |
| No specific | 1 | ACCESS PLATFORM 1M(3 FT) |
| No specific | AR | SCALE |
| No specific | AR | SCALPEL |
| No specific | AR | WARNING NOTICE(S) |
| 956A7616 | 1 | MAT, PROTECTION - INLET COWL |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1041) | isopropyl alcohol |
| (Material No.CP2929) | airtech flashbreaker |
| (Material No.CP8019) | varnish A1500-UVR |
| (Material No.CP8020) | glass veil |
| (Material No.CP8024) | cotton paper label |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 72-21-20-000-801-A | Removal of the Fan Blades |
| TASK 72-21-20-400-801-A | Installation of the Fan Blades |
Cotton Labels to BondSubtask 72-21-20-940-051-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 956A7616 MAT, PROTECTION - INLET COWL in the lower half of the inlet cowl.
Subtask 72-21-20-010-057-A Subtask 72-21-20-990-051-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
- 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 956A7616 MAT, PROTECTION - INLET COWL in the lower half of the inlet cowl.
C. Applicable Parts
(1) The subsequent table gives a list of the part numbers that are applicable to this repair. All the part numbers are applicable to all paragraphs unless specified differently.
Table 801 - Applicable Parts
Subtask 72-21-20-220-058-A (1) The subsequent table gives a list of the part numbers that are applicable to this repair. All the part numbers are applicable to all paragraphs unless specified differently.
Table 801 - Applicable Parts
| Part Number | Service Bulletin | CSN | Designation |
|---|---|---|---|
| 362-040-908-0 | - | (54-120, 72-00-01) | BLADE, FAN |
| 362-040-909-0 | - | (54-120, 72-00-01) | BLADE, FAN |
D. Dimensional Information
Subtask 72-21-20-220-059-A NOTE: Dimensions are given in inches with millimeters in parentheses.
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 802 - Dimensional Information | Description | Minimum In-Process Dimension | Maximum In-Process Dimension | Minimum Finish Dimension | Maximum Finish Dimension | Reference Dimension |
|---|---|---|---|---|---|
| DIM A | | | 0.20 in. (5 mm) | | |
E. If necessary, measure the axial, tangential and radial moment-weights of the fan blade.
(1) Make sure that the SCALE is calibrated.
(2) Install the fan blade.
(3) Weigh the blade and record the moment-weights. Refer to the scale manufacturer's procedures for weighing.
Subtask 72-21-20-918-050-A (1) Make sure that the SCALE is calibrated.
(2) Install the fan blade.
(3) Weigh the blade and record the moment-weights. Refer to the scale manufacturer's procedures for weighing.
F. For the MOMENTS WEIGHT label, write the information on the cotton paper label (Material No.CP8024) with an Optical Character Recognition (OCR) scan legible print font and as follows:
(1) Character Height: 0.098 in. (2.5 mm).
(2) The space between the two characters must be between 0.2 and 0.4 times the height of the characters.
(3) The space between the two markings on the same line must be at least equivalent to three characters.
(4) The minimum line spacing must be at least 1.4 times the height.
(5) The margin between the information written and the sides of the label must be at least 0.5 times the character height.
(6) The display and content of information must be as shown in
(7) The location of the data matrix can be on the right side or the left side of the label.
(8) Make sure that the ink is dry.
(9) Make sure that the label is legible.
Subtask 72-21-20-918-051-A (1) Character Height: 0.098 in. (2.5 mm).
(2) The space between the two characters must be between 0.2 and 0.4 times the height of the characters.
(3) The space between the two markings on the same line must be at least equivalent to three characters.
(4) The minimum line spacing must be at least 1.4 times the height.
(5) The margin between the information written and the sides of the label must be at least 0.5 times the character height.
(6) The display and content of information must be as shown in
(7) The location of the data matrix can be on the right side or the left side of the label.
(8) Make sure that the ink is dry.
(9) Make sure that the label is legible.
G. For the identification label, write the information on the cotton paper label (Material No.CP8024) with an OCR scan legible print font and as follows:
(1) Character Height: 0.098 in. (2.5 mm).
(2) The space between the two characters must be between 0.2 and 0.4 times the height of the characters.
(3) The space between the two markings on the same line must be at least equivalent to three characters.
(4) The minimum line spacing must be at least 1.4 times the height.
(5) The margin between the information written and the sides of the label must be at least 0.5 times the character height.
(6) The display and content of information must be as shown in
(7) The location of the data matrix can be on the right side or the left side of the label.
(8) Make sure that the ink is dry.
(9) Make sure that the label is legible.
4. Procedure(1) Character Height: 0.098 in. (2.5 mm).
(2) The space between the two characters must be between 0.2 and 0.4 times the height of the characters.
(3) The space between the two markings on the same line must be at least equivalent to three characters.
(4) The minimum line spacing must be at least 1.4 times the height.
(5) The margin between the information written and the sides of the label must be at least 0.5 times the character height.
(6) The display and content of information must be as shown in
(7) The location of the data matrix can be on the right side or the left side of the label.
(8) Make sure that the ink is dry.
(9) Make sure that the label is legible.
Subtask 72-21-20-950-050-A
A. Apply airtech flashbreaker (Material No.CP2929) around the varnished area of the label to replace.
Subtask 72-21-20-970-050-A B. If necessary, identify and record the information marked on the labels and included in the data matrix.
Subtask 72-21-20-150-050-A C. Preparation of the Repair Surface
Subtask 72-21-20-120-051-A CAUTION:
DO NOT REMOVE THE CARBON FIBERS OR MAKE NICKS OR DENTS IN THEM. IF YOU DO, DAMAGE TO THE PART WILL OCCUR.
(1) Remove the label and the varnish from the fan blade with the SCALPEL or any other sharp tool. D. Remove the remaining varnish with the ABRASIVE PAPER - 240 GRIT (ANSI B74.18) minimum. Do not remove the composite material.
Subtask 72-21-20-110-057-A Subtask 72-21-20-220-057-A F. Do a visual examination of the area to repair. Make sure that:
Subtask 72-21-20-930-050-A - The surface is mat. A bright area is not permitted.
- There is no residual varnish.
- There is no frayed fibers or cracks.
G. Mark the labels with the information recorded before and specified in paragraphs 3.F and 3.G with an OCR scan legible print font.
Subtask 72-21-20-110-058-A Subtask 72-21-20-360-050-A I. Bond the cotton paper labels as follows.
(1) Make sure that you put the labels in the correct position to be able to read the text when the fan blade is tip down.
(3) Apply the cotton paper label (Material No.CP8024) on the varnished area.
(5) Apply a glass veil (Material No.CP8020) on the varnished label. The glass veil must extend DIM. A more than the label.
Subtask 72-21-20-220-060-A (1) Make sure that you put the labels in the correct position to be able to read the text when the fan blade is tip down.
CAUTION:
DO NOT APPLY VARNISH ON THE WEAR STRIPS. DAMAGE TO THE PART CAN OCCUR.
(2) Apply the varnish A1500-UVR (Material No.CP8019) . (3) Apply the cotton paper label (Material No.CP8024) on the varnished area.
CAUTION:
DO NOT APPLY VARNISH ON THE WEAR STRIPS. DAMAGE TO THE PART CAN OCCUR.
(4) Apply the varnish A1500-UVR (Material No.CP8019) . (5) Apply a glass veil (Material No.CP8020) on the varnished label. The glass veil must extend DIM. A more than the label.
CAUTION:
DO NOT APPLY VARNISH ON THE WEAR STRIPS. DAMAGE TO THE PART CAN OCCUR.
(6) Apply the varnish A1500-UVR (Material No.CP8019) . The varnish must extend Dim. A more than the glass veil. Refer to table 802 for Dim. A. CAUTION:
DO NOT MOVE THE PART DURING THE DRYING PROCEDURE. IF YOU DO, DAMAGE TO THE PART CAN OCCUR.
(7) Dry at ambient temperature during 7 to 9 hours or at a temperature range between 60 deg.C (140 deg.F) and 65 deg.C (149 deg.F) during 3 hours. J. Do a visual and dimensional examination as follows:
(1) Foreign objects more than 0.04 in. (1 mm) in diameter are not permitted.
(2) Air bubbles more than 0.04 in. (1 mm) in diameter are not permitted.
(3) Non-impregnated areas more than 0.0062 in.2 (4 mm2) are not permitted.
(4) The labels must be legible.
5. Close-up(1) Foreign objects more than 0.04 in. (1 mm) in diameter are not permitted.
(2) Air bubbles more than 0.04 in. (1 mm) in diameter are not permitted.
(3) Non-impregnated areas more than 0.0062 in.2 (4 mm2) are not permitted.
(4) The labels must be legible.
Subtask 72-21-20-410-056-A Subtask 72-21-20-942-058-A
B. 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 956A7616 MAT, PROTECTION - INLET COWL from the air intake cowl.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the 956A7616 MAT, PROTECTION - INLET COWL from the air intake cowl.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).