DOC AIRBUS | AMM A320FInstallation of the Linear Variable Differential Transducer (LVDT) of the Aileron Servo-Control
TASK 27-14-51-400-005-A
Installation of the Linear Variable Differential Transducer (LVDT) of the Aileron Servo-Control
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 27-14-51-941-071-A
Subtask 27-14-51-410-054-A
[Rev.10 from 2021]
2026.03.31 23:47:42 UTC
Installation of the Linear Variable Differential Transducer (LVDT) of the Aileron Servo-Control
WARNING:
MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.
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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
BE CAREFUL WHEN YOU DO MAINTENANCE TASKS ON THE WING TRAILING EDGE:
1. Reason for the Job- DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE RACEWAYS.
- DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE INSTALLATIONS.
- MAKE SURE THAT THE ELECTRICAL CABLES ARE INSTALLED CORRECTLY. INCORRECT INSTALLATION CAN CAUSE DAMAGE.
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.03LDA1) | Grease-Hydraulic Systems - - |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.14QFB1) | Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 575AT, 675AT |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 6 | PACKING | AIPC 27-14-51-01-120 |
| 4 | PACKING | AIPC 27-14-51-01-130 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 27-14-00-710-001-A | Operational Test of the Aileron and Hydraulic Actuation |
| TASK 27-14-00-820-001-A | Adjustment of the Aileron |
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-10-00-864-003-A | Depressurize the Blue Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 29-23-00-860-001-A | Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU) |
| TASK 29-23-00-860-002-A | Connection of the Isolation Coupling of the Power Transfer Unit (PTU) |
Aileron Servo-Control LVDTSubtask 27-14-51-941-071-A
A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that there is a WARNING NOTICE(S) in the cockpit to tell persons not to pressurize the Green or the Blue hydraulic systems.
Subtask 27-14-51-860-066-A (1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that there is a WARNING NOTICE(S) in the cockpit to tell persons not to pressurize the Green or the Blue hydraulic systems.
B. Aircraft Maintenance Configuration
(2) Make sure that the Green and the Blue hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-003).
(3) Make sure that the Green and the Blue hydraulic system reservoirs are depressurized (Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that there is a CONTAINER 1 L (1/4 USGAL) below the applicable aileron servo-control.
(5) Make sure that the ACCESS PLATFORM 4M (13 FT) is in position below the applicable zone 575(675).
(6) Make sure that the applicable access panel is removed:
Subtask 27-14-51-865-063-A WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
(1) Make sure that the Isolation Coupling of the Power Transfer Unit (PTU) is disconnected (Ref. AMM TASK 29-23-00-860-001). (2) Make sure that the Green and the Blue hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-003).
(3) Make sure that the Green and the Blue hydraulic system reservoirs are depressurized (Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that there is a CONTAINER 1 L (1/4 USGAL) below the applicable aileron servo-control.
(5) Make sure that the ACCESS PLATFORM 4M (13 FT) is in position below the applicable zone 575(675).
(6) Make sure that the applicable access panel is removed:
C. 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/ELAC1/NORM/SPLY | 15CE1 | B11 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| ** ON A/C ALL | |||
| 105VU | FLIGHT CONTROLS/ELAC2/STBY SPLY | 16CE2 | A02 |
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 121VU | FLIGHT CONTROLS/ELAC2/NORM/SPLY | 15CE2 | R20 |
CAUTION:
BE CAREFUL WHEN YOU DO MAINTENANCE TASKS ON THE WING TRAILING EDGE:
Subtask 27-14-51-420-063-A - DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE RACEWAYS.
- DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE INSTALLATIONS.
- MAKE SURE THAT THE ELECTRICAL CABLES ARE INSTALLED CORRECTLY. INCORRECT INSTALLATION CAN CAUSE DAMAGE.
A. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Remove the COVER - PROTECTION from the aileron servo-control interface.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Lubricate the new AIPC 27-14-51-01-130 PACKING (4) and the new AIPC 27-14-51-01-120 PACKING (6) with Grease-Hydraulic Systems - - (Material No.03LDA1) .
Subtask 27-14-51-420-054-A (1) Clean the component interface and/or the adjacent area with Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Remove the COVER - PROTECTION from the aileron servo-control interface.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Lubricate the new AIPC 27-14-51-01-130 PACKING (4) and the new AIPC 27-14-51-01-120 PACKING (6) with Grease-Hydraulic Systems - - (Material No.03LDA1) .
B. Installation of the LVDT of the Aileron Servo-Control
(2) Install the new packing (6) on the socket (7).
(3) Put the LVDT (3) in position on the aileron servo-control.
(5) TORQUE the bolts (1) to between 0.54 and 0.46 m.daN (47.79 and 40.71 lbf.in )
.
(6) Do a bonding check on the LVDT (3) (Ref. AMM TASK 20-28-00-912-802).
(7) Safety the bolts (1) with14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
Subtask 27-14-51-860-067-A WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(1) Install the new packing (4) on the LVDT (3). (2) Install the new packing (6) on the socket (7).
(3) Put the LVDT (3) in position on the aileron servo-control.
NOTE: You must compress the spring in the aileron servo-control to do this.
(4) Install the bonding leads (8), the lockwasher (9), the washers (2) and the bolts (1). (5) TORQUE the bolts (1) to between 0.54 and 0.46 m.daN (47.79 and 40.71 lbf.in )
. (6) Do a bonding check on the LVDT (3) (Ref. AMM TASK 20-28-00-912-802).
(7) Safety the bolts (1) with
C. Aircraft Maintenance Configuration
(1) Connect the Isolation Coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-002).
(2) Remove the container from below the LVDT (3).
(3) Make sure that the work area is clean and clear of tools and other items.
Subtask 27-14-51-865-064-A (1) Connect the Isolation Coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-002).
(2) Remove the container from below the LVDT (3).
(3) Make sure that the work area is clean and clear of tools and other items.
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 27-14-51-710-054-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| ** ON A/C ALL | |||
| 105VU | FLIGHT CONTROLS/ELAC2/STBY SPLY | 16CE2 | A02 |
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 121VU | FLIGHT CONTROLS/ELAC2/NORM/SPLY | 15CE2 | R20 |
E. Test
(1) Do a check of the aileron adjustment (Ref. AMM TASK 27-14-00-820-001).
(2) Do a operational test of the aileron (Ref. AMM TASK 27-14-00-710-001).
(3) Examine the LVDT (3) for leaks.
5. Close-up(1) Do a check of the aileron adjustment (Ref. AMM TASK 27-14-00-820-001).
(2) Do a operational test of the aileron (Ref. AMM TASK 27-14-00-710-001).
(3) Examine the LVDT (3) for leaks.
Subtask 27-14-51-410-054-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panel:
Subtask 27-14-51-942-060-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panel:
B. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) 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 access platform(s).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.