DOC AIRBUS | AMM A320FMain Landing-Gear Door - Replacement of the Central-Ramp Teflon Paint
TASK 52-81-18-300-802-A
Main Landing-Gear Door - Replacement of the Central-Ramp Teflon Paint
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 52-81-18-941-052-A ** ON A/C NOT FOR ALL
Subtask 52-81-18-370-050-A ** ON A/C NOT FOR ALL
Subtask 52-81-18-410-052-A ** ON A/C NOT FOR ALL Subtask 52-81-18-865-055-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:28:38 UTC
Main Landing-Gear Door - Replacement of the Central-Ramp Teflon Paint
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
WARNING:
PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
WARNING:
MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
WARNING:
MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
CAUTION:
DO NOT CAUSE DAMAGE TO THE SURFACES. THE COMPONENTS ARE MADE OF CARBONFIBER REINFORCED PLASTIC.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) |
| No specific | AR | CLOTH-EMERY (GRADE 240) |
| No specific | AR | CLOTH-EMERY (GRADE 280) |
| No specific | AR | CLOTH-EMERY (GRADE 400) |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | 1 | SCRAPER - NON METALLIC |
| No specific | 1 | VACUUM CLEANER |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.04DAB2) | Primer Epoxy Paint-- Corrosion Inhibiting Structure |
| (Material No.04EAC2) | Primer Polyurethane Paint_- Corrosion Inhibiting Structure |
| (Material No.04PAD2) | Polyurethane Coating-- Abrasion Resistant Structure |
| (Material No.06ABB1) | Polysulfide Sealant-Fuel Tank Fillet - |
| (Material No.08BBF1) | Non Aqueous Cleaner_- Methyl-Ethyl-Ketone - |
| (Material No.10ABC1) | Surface Pretreatment-Light Alloys Chemical Conversion Yellow - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-34-24-869-002-A | Aircraft Grounding (Earthing) for the Maintenance Operations |
| TASK 12-34-24-869-002-A-01 | Aircraft Grounding (Earthing) during Transit, Turnaround or Overnight Stop |
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 32-00-00-860-001-A | Flight Configuration Precautions with Electrical Power |
| TASK 32-00-00-860-001-A-01 | Flight Configuration Precautions without Electrical Power |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
| TASK 32-12-00-410-001-A | Close the Main Gear Doors after Access |
Main Landing-Gear Door - Replacement of the Central-Ramp Teflon PaintSubtask 52-81-18-941-052-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Make sure that the aircraft is electrically grounded (Ref. AMM TASK 12-34-24-869-002).
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(3) Put the WARNING NOTICE(S) in the flight compartment to tell persons not to operate the main landing-gear (MLG) doors in case not properly secured the door levers.
(4) Put the WARNING NOTICE(S) in the flight compartment to tell persons not to operate the hydraulic systems.
(5) Put the ACCESS PLATFORM 2M (6 FT) in position at zone 734 for the left (LH) MLG door and/or zone 744 for the right (RH) MLG door.
(6) Prevent the damage to the anti-ice heat elements (Ref. AMM TASK 32-00-00-860-001).
Subtask 52-81-18-860-052-A ** ON A/C NOT FOR ALL (1) Make sure that the aircraft is electrically grounded (Ref. AMM TASK 12-34-24-869-002).
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(3) Put the WARNING NOTICE(S) in the flight compartment to tell persons not to operate the main landing-gear (MLG) doors in case not properly secured the door levers.
(4) Put the WARNING NOTICE(S) in the flight compartment to tell persons not to operate the hydraulic systems.
(5) Put the ACCESS PLATFORM 2M (6 FT) in position at zone 734 for the left (LH) MLG door and/or zone 744 for the right (RH) MLG door.
(6) Prevent the damage to the anti-ice heat elements (Ref. AMM TASK 32-00-00-860-001).
B. Depressurize the Aircraft Hydraulic Systems
(1) Depressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-864-001).
Subtask 52-81-18-865-054-A ** ON A/C NOT FOR ALL (1) Depressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-864-001).
C. Open, safety and tag this(these) circuit breaker(s):
Subtask 52-81-18-010-052-A ** ON A/C NOT FOR ALL 4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | H12 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | R35 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R34 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY | 4GG | M36 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/CTL | 3GG | M35 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/CTL | 1GG | M34 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY | 2GG | M33 |
| 121VU | HYDRAULIC/Y HYD/PUMP ENG2/MONG | 3700GD | Q37 |
| 121VU | HYDRAULIC/Y HYD/PUMP ENG2/CTL | 3701GD | Q36 |
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R33 |
Subtask 52-81-18-370-050-A ** ON A/C NOT FOR ALL
A. Replacement of the Central-Ramp Teflon Paint
(a) Remove the damaged teflon paint from the ramp blister and the T-sections with a SCRAPER - NON METALLIC.
(b) Remove the bonding primer of the ramp blister and the T-sections with a CLOTH-EMERY (GRADE 240).
(c) Remove all unwanted material using a VACUUM CLEANER.
(d) Clean the mating surfaces of the ramp blister and the T-sections with Non Aqueous Cleaner_- Methyl-Ethyl-Ketone - (Material No.08BBF1) .
(2) Replace sealant:
(a) Fill any gaps between the ramp blister and the T-sections with Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) .
(b) Cure the sealant (refer to the manufacturer's instructions).
(c) Sand the surface of the sealant with CLOTH-EMERY (GRADE 280) and finish with CLOTH-EMERY (GRADE 400).
(e) Clean the mating surfaces of the ramp blister and the T-sections with Non Aqueous Cleaner_- Methyl-Ethyl-Ketone - (Material No.08BBF1) .
(3) Paint the central-ramp:
(a) Apply Surface Pretreatment-Light Alloys Chemical Conversion Yellow - (Material No.10ABC1) .
(b) Apply Primer Polyurethane Paint_- Corrosion Inhibiting Structure (Material No.04EAC2) or Primer Epoxy Paint-- Corrosion Inhibiting Structure (Material No.04DAB2) to the mating surfaces of the ramp blister and the T-sections.
(c) Apply Polyurethane Coating-- Abrasion Resistant Structure (Material No.04PAD2) to the surface of the ramp blister and the T-sections.
(d) Let the paint dry (refer to the manufacturer's instructions).
5. Close-upNOTE: The following procedure gives the replacement for the LH side. Replacement for the RH side is equivalent.
(1) Remove the damaged teflon paint: (a) Remove the damaged teflon paint from the ramp blister and the T-sections with a SCRAPER - NON METALLIC.
(b) Remove the bonding primer of the ramp blister and the T-sections with a CLOTH-EMERY (GRADE 240).
(c) Remove all unwanted material using a VACUUM CLEANER.
(d) Clean the mating surfaces of the ramp blister and the T-sections with Non Aqueous Cleaner_- Methyl-Ethyl-Ketone - (Material No.08BBF1) .
(2) Replace sealant:
(a) Fill any gaps between the ramp blister and the T-sections with Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) .
(b) Cure the sealant (refer to the manufacturer's instructions).
(c) Sand the surface of the sealant with CLOTH-EMERY (GRADE 280) and finish with CLOTH-EMERY (GRADE 400).
- Make sure that you do not remove the remaining sealant from the gaps between T-sections.
(e) Clean the mating surfaces of the ramp blister and the T-sections with Non Aqueous Cleaner_- Methyl-Ethyl-Ketone - (Material No.08BBF1) .
(3) Paint the central-ramp:
(a) Apply Surface Pretreatment-Light Alloys Chemical Conversion Yellow - (Material No.10ABC1) .
(b) Apply Primer Polyurethane Paint_- Corrosion Inhibiting Structure (Material No.04EAC2) or Primer Epoxy Paint-- Corrosion Inhibiting Structure (Material No.04DAB2) to the mating surfaces of the ramp blister and the T-sections.
(c) Apply Polyurethane Coating-- Abrasion Resistant Structure (Material No.04PAD2) to the surface of the ramp blister and the T-sections.
(d) Let the paint dry (refer to the manufacturer's instructions).
Subtask 52-81-18-410-052-A ** ON A/C NOT FOR ALL Subtask 52-81-18-865-055-A ** ON A/C NOT FOR ALL
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 52-81-18-942-052-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | H12 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | R35 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R34 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY | 4GG | M36 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/CTL | 3GG | M35 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/CTL | 1GG | M34 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY | 2GG | M33 |
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R33 |
C. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Remove the safety barriers.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Remove the safety barriers.