DOC AIRBUS | AMM A320FPainting of Link Arm with Damaged Paint Coating [CFML]
TASK 78-32-42-370-801-A
Painting of Link Arm with Damaged Paint Coating
To repair eroded paint on the blocker door link arm.
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 78-32-42-941-068-A
Subtask 78-32-42-150-050-A
Subtask 78-32-42-410-079-A
[Rev.10 from 2021]
2026.04.01 13:13:34 UTC
Painting of Link Arm with Damaged Paint Coating
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.
WARNING:
OBEY THE MATERIAL MANUFACTURER INSTRUCTIONS WHEN YOU USE PAINTS, CHROMATE AGENTS, CLEANING AGENTS AND SPECIAL COATINGS. MOST OF THESE MATERIALS ARE DANGEROUS AND FLAMMABLE. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
CAUTION:
DO NOT OPEN THE THRUST REVERSER COWLS WHEN THE TRANSLATING COWL IS DEPLOYED.
DO NOT DEPLOY THE TRANSLATING COWL WHEN THRUST REVERSER COWLS ARE OPEN.
IF YOU DO NOT OBEY THESE INSTRUCTIONS, THE THRUST REVERSER COWLS CAN TOUCH THE WING AND DAMAGE CAN OCCUR.
ZONE: 400
1. Reason for the JobTo repair eroded paint on the blocker door link arm.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CLOTH-EMERY (GRADE 320) |
| No specific | AR | PAPER - MASKING |
| No specific | 1 | SCRAPER - PLASTIC |
| No specific | AR | TAPE - ADHESIVE |
| No specific | AR | TAPE - MASKING |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CPNCL01717) | Alodine 1200S |
| (Material No.CPNCL01723) | Alodine 1500 |
| (Material No.CPNCL01845) | primer PAC 33 |
| (Material No.CPNCL02662) | ISOPROPYL ALCOHOL |
| (Material No.CPNCL02690) | permanent ink |
| (Material No.CPNCL02708) | Anti Erosion Paint-Celoflex 95 |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-803-A | Closing of the Fan Cowl Doors |
| TASK 73-29-00-740-804-A | Thrust Reverser Cycling Test (Menu Mode) |
| TASK 78-30-00-040-807-A | Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU) |
| TASK 78-30-00-440-807-A | Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU) |
| TASK 78-32-42-000-804-A | Removal of the Thrust Reverser Blocker Doors |
| TASK 78-32-42-400-804-A | Installation of the Thrust Reverser Blocker Doors |
| TASK 78-32-50-010-801-A | Manually Deploy the Translating Cowl |
| TASK 78-32-50-410-801-A | Manually Stow the Translating Cowl |
| SRM 517511 | |
Link Arm with Damaged Paint CoatingSubtask 78-32-42-941-068-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 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 a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 78-32-42-010-092-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 WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch, and
- 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 a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.
Subtask 78-32-42-040-073-A (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.
C. Deactivation of the Thrust Reverser System for Maintenance
Subtask 78-32-42-010-093-A WARNING:
YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-807). D. Get Access
(1) Manually deploy the translating cowl (Ref. AMM TASK 78-32-50-010-801).
(2) Remove the blocker door (Ref. AMM TASK 78-32-42-000-804).
(3) Remove the blocker door link arm (Ref. AMM TASK 78-32-42-000-804).
4. Procedure(1) Manually deploy the translating cowl (Ref. AMM TASK 78-32-50-010-801).
(2) Remove the blocker door (Ref. AMM TASK 78-32-42-000-804).
(3) Remove the blocker door link arm (Ref. AMM TASK 78-32-42-000-804).
Subtask 78-32-42-150-050-A
A. Paint Stripping of the Link Arm (1)
(2) Use an TAPE - ADHESIVE to check the adhesion of the remaining paint.
(3) If required, perform paint stripping SRM 517511.
Subtask 78-32-42-950-050-A NOTE: When using alodine, primer or paint follow cure time of the consumable recommended by manufacturer.
(1) Remove any loose paint with a SCRAPER - PLASTIC. (2) Use an TAPE - ADHESIVE to check the adhesion of the remaining paint.
(3) If required, perform paint stripping SRM 517511.
B. Masking of the Required Area
(1) Mask off the adjacent area, which will not be treated, with TAPE - MASKING and PAPER - MASKING.
Subtask 78-32-42-370-052-A (1) Mask off the adjacent area, which will not be treated, with TAPE - MASKING and PAPER - MASKING.
C. Painting of the Link Arm
(1) Abrade the surface with the CLOTH-EMERY (GRADE 320) and chamfer the edges of the remaining paint around the damaged area.
(2) Lightly sand the areas to be refinished.
(3) Solvent wipe with clean cloths and ISOPROPYL ALCOHOL (Material No.CPNCL02662) .
(4) Repeat as required to ensure surface is unsoiled.
(5) Apply Alodine 1200S (Material No.CPNCL01717) or Alodine 1500 (Material No.CPNCL01723) over the exposed metal and allow to dry.
(6) Apply one coat of primer PAC 33 (Material No.CPNCL01845) and allow to dry.
(7) Coat the link arms with Anti Erosion Paint-Celoflex 95 (Material No.CPNCL02708) per manufacturers recommended instructions. Coating thickness to be between 0.043 mm (0.0017 in.) and 0.058 mm (0.0023 in.).
(8) Perform general visual inspection at completion of the repair.
(9) If any of the link arm marking was damaged, repair it as follows:
(a) Depending on damage - repair existing or add new "NO STEP" marking using between 17.3 mm (0.68 in.) and 18.3 mm (0.72 in.) high characters approximately centered on the link arm. Produce characters with a permanent ink (Material No.CPNCL02690) .
(b) Depending on damage - repair existing or add new "FWD" markings and arrows using between 4.6 mm (0.18 in.) and 5.6 mm (0.22 in.) high characters located appropriately in the area shown on the figures. Produce characters with a permanent ink (Material No.CPNCL02690) .
(c) Depending on damage - repair existing or add new "P/N" marking and arrows using between 3.0 mm (0.12 in.) and 4.0 mm (0.16 in.) high characters located appropriately in the area shown on the figures. Produce characters with a permanent ink (Material No.CPNCL02690) .
(d) Coat markings with a clear lacquer or a polyurethane topcoat and air dry. The marking shall be legible after coating.
(e) Perform visual inspection to ensure marking is legible.
Subtask 78-32-42-950-051-A (1) Abrade the surface with the CLOTH-EMERY (GRADE 320) and chamfer the edges of the remaining paint around the damaged area.
(2) Lightly sand the areas to be refinished.
(3) Solvent wipe with clean cloths and ISOPROPYL ALCOHOL (Material No.CPNCL02662) .
(4) Repeat as required to ensure surface is unsoiled.
(5) Apply Alodine 1200S (Material No.CPNCL01717) or Alodine 1500 (Material No.CPNCL01723) over the exposed metal and allow to dry.
(6) Apply one coat of primer PAC 33 (Material No.CPNCL01845) and allow to dry.
(7) Coat the link arms with Anti Erosion Paint-Celoflex 95 (Material No.CPNCL02708) per manufacturers recommended instructions. Coating thickness to be between 0.043 mm (0.0017 in.) and 0.058 mm (0.0023 in.).
(8) Perform general visual inspection at completion of the repair.
(9) If any of the link arm marking was damaged, repair it as follows:
(a) Depending on damage - repair existing or add new "NO STEP" marking using between 17.3 mm (0.68 in.) and 18.3 mm (0.72 in.) high characters approximately centered on the link arm. Produce characters with a permanent ink (Material No.CPNCL02690) .
(b) Depending on damage - repair existing or add new "FWD" markings and arrows using between 4.6 mm (0.18 in.) and 5.6 mm (0.22 in.) high characters located appropriately in the area shown on the figures. Produce characters with a permanent ink (Material No.CPNCL02690) .
(c) Depending on damage - repair existing or add new "P/N" marking and arrows using between 3.0 mm (0.12 in.) and 4.0 mm (0.16 in.) high characters located appropriately in the area shown on the figures. Produce characters with a permanent ink (Material No.CPNCL02690) .
(d) Coat markings with a clear lacquer or a polyurethane topcoat and air dry. The marking shall be legible after coating.
(e) Perform visual inspection to ensure marking is legible.
D. Unmasking of the Area
(1) Remove masking of the area.
5. Close-up(1) Remove masking of the area.
Subtask 78-32-42-410-079-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the blocker door link arm (Ref. AMM TASK 78-32-42-400-804).
(3) Install the blocker door (Ref. AMM TASK 78-32-42-400-804).
(4) Manually stow the translating cowl (Ref. AMM TASK 78-32-50-410-801).
Subtask 78-32-42-440-065-A Subtask 78-32-42-410-080-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the blocker door link arm (Ref. AMM TASK 78-32-42-400-804).
(3) Install the blocker door (Ref. AMM TASK 78-32-42-400-804).
(4) Manually stow the translating cowl (Ref. AMM TASK 78-32-50-410-801).
C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.
(2) Remove the WARNING NOTICE(S).
Subtask 78-32-42-740-050-A (1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR.
(2) Remove the WARNING NOTICE(S).