DOC AIRBUS | AMM A320FCheck of the Flaps Shafting Integrity, including Inspection of the Seal Witness Drains
TASK 27-54-00-210-002-A
Check of the Flaps Shafting Integrity, including Inspection of the Seal Witness Drains
Refer to the MPD TASK: 275100-03
CHECK OF FLAPS TRANSMISSION SHAFTING INTEGRITY, INCLUDING INSPECTION OF SEAL WITNESS DRAINS.
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 27-54-00-941-054-A
Subtask 27-54-00-210-052-A
Subtask 27-54-00-410-052-A
[Rev.10 from 2021]
2026.03.31 23:53:05 UTC
Check of the Flaps Shafting Integrity, including Inspection of the Seal Witness Drains
WARNING:
PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
1. Reason for the Job- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
Refer to the MPD TASK: 275100-03
CHECK OF FLAPS TRANSMISSION SHAFTING INTEGRITY, INCLUDING INSPECTION OF SEAL WITNESS DRAINS.
NOTE: If you do this task together with MPD-TASK 275100-01, do MPD-TASK 275100-01 first.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE |
| No specific | AR | FLASHLIGHT |
| No specific | AR | MIRROR - INSPECTION, FLEXIBLE |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| 460005835 | 2 | SLEEVE - GROUND LOCK |
| 98D27803000000 | 1 | LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.12ACB1) | Corrosion Preventive Compound-Heavy Duty Hard Film - |
| (Material No.12ACC1) | Corrosion Preventive Compound-Heavy Duty Soft Film - |
| (Material No.12ADB1) | Corrosion Preventive Compound-Water Displacing & Heavy Duty Hard Film - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 27-50-00-866-008-A | Extension of the Flaps on the Ground |
| TASK 27-50-00-866-008-A-01 | Extension of the Flaps/Slats on the Ground |
| TASK 27-50-00-866-009-A | Retraction of the Flaps on the Ground |
| TASK 27-50-00-866-009-A-01 | Retraction of the Flaps/Slats on the Ground |
| TASK 27-51-51-000-001-A | Removal of the Flap Wing-Tip Brake |
| TASK 27-51-51-400-001-A | Installation of the Flap Wing-Tip Brake |
| 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 |
Torque Shaft - Steady Bearing Typical InstallationSubtask 27-54-00-941-054-A
A. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic systems.
(2) Put the WARNING NOTICE(S) in position to tell persons not to operate the flight controls.
(3) Put the WARNING NOTICE(S) in position to tell persons not to operate the landing gear doors.
(4) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
Subtask 27-54-00-860-065-A (1) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic systems.
(2) Put the WARNING NOTICE(S) in position to tell persons not to operate the flight controls.
(3) Put the WARNING NOTICE(S) in position to tell persons not to operate the landing gear doors.
(4) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
B. Aircraft Maintenance Configuration
(2) Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION on the flap/slat control lever.
Subtask 27-54-00-865-057-A 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.
(1) Do the extension of the flaps on ground (Ref. AMM TASK 27-50-00-866-008). (2) Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION on the flap/slat control lever.
C. Open, safety and tag this(these) circuit breaker(s):
Subtask 27-54-00-010-054-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B02 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2 | 8CV | Q21 |
D. Get Access
(2) Install the 460005835 SLEEVE - GROUND LOCK on each MLG door actuating cylinder.
(3) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the applicable wing.
4. ProcedureNOTE: It is not necessary to open access panels. Do the inspection with extended flaps.
(1) Open the MLG doors (Ref. AMM TASK 32-12-00-010-001). (2) Install the 460005835 SLEEVE - GROUND LOCK on each MLG door actuating cylinder.
(3) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the applicable wing.
Subtask 27-54-00-210-052-A
A. Inspection
(1) Examine the torque shaft assemblies:
(a) Make sure that the torque shaft assemblies are correctly installed and that the retainer springs safety the pins correctly.
(b) Use a FLASHLIGHT and a MIRROR - INSPECTION, FLEXIBLE to examine the torque shaft assemblies and the input joints for:
(d) Do an inspection of the flange bolts for corrosion.
If you do not find corrosion, apply a new layer of the Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) or Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) or Corrosion Preventive Compound-Water Displacing & Heavy Duty Hard Film - (Material No.12ADB1) on the flange bolts.
(2) Examine the steady bearings:
(a) Use a FLASHLIGHT and a MIRROR - INSPECTION, FLEXIBLE to examine the steady bearings and their structural interfaces for:
(a) Use a FLASHLIGHT and a MIRROR - INSPECTION, FLEXIBLE to examine the external surface of the WTB at the seal witness drains.
(b) The area around the seal witness drains is permitted to be wet with oil. But, if a drop of hydraulic fluid is found, replace the WTB, (Ref. AMM TASK 27-51-51-000-001) (Ref. AMM TASK 27-51-51-400-001).
(c) Clean the area around the seal witness drains if this area was wet with oil.
5. Close-up(1) Examine the torque shaft assemblies:
(a) Make sure that the torque shaft assemblies are correctly installed and that the retainer springs safety the pins correctly.
(b) Use a FLASHLIGHT and a MIRROR - INSPECTION, FLEXIBLE to examine the torque shaft assemblies and the input joints for:
- Stress
- Distortion
- Dents
- Cracks
- Corrosion
- Satisfactory surface protection.
(d) Do an inspection of the flange bolts for corrosion.
If you do not find corrosion, apply a new layer of the Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) or Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) or Corrosion Preventive Compound-Water Displacing & Heavy Duty Hard Film - (Material No.12ADB1) on the flange bolts.
(2) Examine the steady bearings:
(a) Use a FLASHLIGHT and a MIRROR - INSPECTION, FLEXIBLE to examine the steady bearings and their structural interfaces for:
- Stress
- Cracks
- Corrosion
- Satisfactory surface protection.
- Condition of the bearing seals (missing, damages, bent, wear).
(a) Use a FLASHLIGHT and a MIRROR - INSPECTION, FLEXIBLE to examine the external surface of the WTB at the seal witness drains.
(b) The area around the seal witness drains is permitted to be wet with oil. But, if a drop of hydraulic fluid is found, replace the WTB, (Ref. AMM TASK 27-51-51-000-001) (Ref. AMM TASK 27-51-51-400-001).
(c) Clean the area around the seal witness drains if this area was wet with oil.
Subtask 27-54-00-410-052-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the 460005835 SLEEVE - GROUND LOCK on each MLG door actuating cylinder.
(3) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
(4) Remove the access platform(s).
Subtask 27-54-00-865-058-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the 460005835 SLEEVE - GROUND LOCK on each MLG door actuating cylinder.
(3) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
(4) Remove the access platform(s).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 27-54-00-860-066-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B02 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2 | 8CV | Q21 |
C. Aircraft Configuration
(1) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever.
(2) Do the retraction of the flaps on ground (Ref. AMM TASK 27-50-00-866-009).
Subtask 27-54-00-942-057-A (1) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever.
(2) Do the retraction of the flaps on ground (Ref. AMM TASK 27-50-00-866-009).
D. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the WARNING NOTICE(S).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) Remove the safety barriers.
(2) Remove the WARNING NOTICE(S).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.