DOC AIRBUS | AMM A320FRepair of Damaged Flanks of the Teeth of the Slat Track Pinions and Gear Racks
TASK 27-84-68-350-003-A
Repair of Damaged Flanks of the Teeth of the Slat Track Pinions and Gear Racks
Self explanatory
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 27-84-68-860-058-A
Subtask 27-84-68-350-052-A
Subtask 27-84-68-410-054-A
[Rev.10 from 2021]
2026.03.31 23:58:18 UTC
Repair of Damaged Flanks of the Teeth of the Slat Track Pinions and Gear Racks
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:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
DO THIS PROCEDURE IN A HANGAR IF THERE ARE WIND GUSTS. WIND GUSTS CAN CAUSE DAMAGE TO THE LINKAGE WHEN THE RIGGING PINS ARE IN POSITION ON THE RUDDER CONTROL.
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 3M (10 FT) |
| No specific | 1 | BRUSH - NON METALLIC |
| No specific | 1 | HOT AIR BLOWER OPERATING 40 DEG C(104 F) |
| No specific | AR | PAPER - MASKING |
| No specific | AR | TAPE - MASKING |
| No specific | 1 | WARNING NOTICE(S) |
| 98D27803000000 | 1 | LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.03BDB9) | Mineral base Lubricating Oil-General & Water-displacing Preservative Low Temp. - |
| (Material No.03GBB1) | Synthetic Oil base Grease-General Purpose Clay Thickened - |
| (Material No.03GBC1) | Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. - |
| (Material No.03QBA1) | Dry lubricant-General Assembly - - |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.10BCC1) | Phosphoric Acid Surface Pretreatment-Steels Corrosion Removing & Metal Conditioning - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 521 | INBOARD FIXED L.E STRUCTURE |
| 522 | OUTBOARD FIXED L.E STRUCTURE |
| 621 | INBOARD FIXED L.E STRUCTURE |
| 622 | OUTBOARD FIXED L.E STRUCTURE |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 27-80-00-866-004-A | Extending the Slats on the Ground |
| TASK 27-80-00-866-005-A | Retracting the Slats on the Ground |
| TASK 27-84-61-200-002-A | Check of Slat 1 Trailing Edge Backlash |
| TASK 27-84-62-200-002-A | Check of Slat 2, 3, 4 and 5 Trailing Edge Backlash |
| TASK 12-22-00-00 | LUBRICATION - DESCRIPTION AND OPERATION |
Classification of Damage and Repair ChartSubtask 27-84-68-860-058-A
A. Aircraft Maintenance Configuration
(1) Put the slats in the extended position (Ref. AMM TASK 27-80-00-866-004).
(2) Put the WARNING NOTICE(S) in position on the panel 114VU to tell persons not to operate the flap/slat controls.
(3) Attach the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION to the flap/slat control lever on the panel 114VU.
(4) Put the ACCESS PLATFORM 3M (10 FT) in position below the applicable slat track pinion or gear rack.
Subtask 27-84-68-865-059-A (1) Put the slats in the extended position (Ref. AMM TASK 27-80-00-866-004).
(2) Put the WARNING NOTICE(S) in position on the panel 114VU to tell persons not to operate the flap/slat controls.
(3) Attach the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION to the flap/slat control lever on the panel 114VU.
(4) Put the ACCESS PLATFORM 3M (10 FT) in position below the applicable slat track pinion or gear rack.
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 | 5CV | B06 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 | 5CV | B01 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/SLT/CTL/SYS2 | 7CV | R21 |
Subtask 27-84-68-350-052-A
A. Repair of the Damaged Flanks of the Teeth of the Slat Track Pinions and Gear Racks
(2) Apply PAPER - MASKING and TAPE - MASKING to the area adjacent to the repair:
(3) Apply a layer of Phosphoric Acid Surface Pretreatment-Steels Corrosion Removing & Metal Conditioning - (Material No.10BCC1) to the damaged area.
(b) If necessary, apply Phosphoric Acid Surface Pretreatment-Steels Corrosion Removing & Metal Conditioning - (Material No.10BCC1) again.
(c) Clean the repair area with water and Textile-Lint free Cotton - (Material No.14SBA1) .
(d) Dry the repair area with HOT AIR BLOWER OPERATING 40 DEG C(104 F).
(a) Apply Dry lubricant-General Assembly - - (Material No.03QBA1) as a spray. Do this at a distance of 300 mm (11.8110 in.) from the repair area.
(b) Apply Dry lubricant-General Assembly - - (Material No.03QBA1) to all of the surface. Make sure there are no bare areas.
(c) Apply a layer constant thickness of Dry lubricant-General Assembly - - (Material No.03QBA1) . The recommended thickness is between 0.005 mm (0.0002 in.) and 0.015 mm (0.0006 in.).
(d) Let the layer become dry:
(5) Apply a layer of Mineral base Lubricating Oil-General & Water-displacing Preservative Low Temp. - (Material No.03BDB9) to the repair area.
(6) Apply a thin layer of Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) or Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. - (Material No.03GBC1) to the teeth of the slat track pinion and/or gear rack. To do this use a BRUSH - NON METALLIC.
Subtask 27-84-68-220-053-A WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(1) Carefully clean the repair area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) . (2) Apply PAPER - MASKING and TAPE - MASKING to the area adjacent to the repair:
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(a) Apply PAPER - MASKING and TAPE - MASKING to the area adjacent to the repair. (3) Apply a layer of Phosphoric Acid Surface Pretreatment-Steels Corrosion Removing & Metal Conditioning - (Material No.10BCC1) to the damaged area.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(a) Make sure that the color of the surface of the repair area changes to grey-black after approximately 10 minutes. (b) If necessary, apply Phosphoric Acid Surface Pretreatment-Steels Corrosion Removing & Metal Conditioning - (Material No.10BCC1) again.
(c) Clean the repair area with water and Textile-Lint free Cotton - (Material No.14SBA1) .
(d) Dry the repair area with HOT AIR BLOWER OPERATING 40 DEG C(104 F).
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(4) Apply a thin layer of Dry lubricant-General Assembly - - (Material No.03QBA1) to the repair area: (a) Apply Dry lubricant-General Assembly - - (Material No.03QBA1) as a spray. Do this at a distance of 300 mm (11.8110 in.) from the repair area.
(b) Apply Dry lubricant-General Assembly - - (Material No.03QBA1) to all of the surface. Make sure there are no bare areas.
(c) Apply a layer constant thickness of Dry lubricant-General Assembly - - (Material No.03QBA1) . The recommended thickness is between 0.005 mm (0.0002 in.) and 0.015 mm (0.0006 in.).
(d) Let the layer become dry:
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1 For Dry lubricant-General Assembly - - (Material No.03QBA1) wait a minimum of 2 hours at room temperature before you continue. (5) Apply a layer of Mineral base Lubricating Oil-General & Water-displacing Preservative Low Temp. - (Material No.03BDB9) to the repair area.
(6) Apply a thin layer of Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) or Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. - (Material No.03GBC1) to the teeth of the slat track pinion and/or gear rack. To do this use a BRUSH - NON METALLIC.
NOTE: For the lubricant grease specification and lubrication requirements, refer to (Ref. AMM D/O 12-22-00-00).
B. Check of the backlash between the slat track pinions and the gear racks
(1) Do a check of the backlash between the slat track pinions and the gear racks:
5. Close-up(1) Do a check of the backlash between the slat track pinions and the gear racks:
- For slat 1 trailing-edge-backlash (Ref. AMM TASK 27-84-61-200-002)
- For slats 2, 3, 4 and 5 (Ref. AMM TASK 27-84-62-200-002).
Subtask 27-84-68-410-054-A
A. Close Access
(1) Remove the access platform(s).
Subtask 27-84-68-865-060-A (1) Remove the access platform(s).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 27-84-68-860-059-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 | 5CV | B06 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 | 5CV | B01 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/SLT/CTL/SYS2 | 7CV | R21 |
C. Put the aircraft back to its initial configuration.
(1) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever on the panel 114VU.
(2) Retract the slats (Ref. AMM TASK 27-80-00-866-005).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(5) Make sure that the work area is clean and clear of tools and other items.
(1) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever on the panel 114VU.
(2) Retract the slats (Ref. AMM TASK 27-80-00-866-005).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(5) Make sure that the work area is clean and clear of tools and other items.