DOC AIRBUS | AMM A320FInstallation of the THS Actuator Motor
TASK 27-44-53-400-001-A
Installation of the THS Actuator Motor
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 27-44-53-860-051-A
Subtask 27-44-53-560-050-A
Subtask 27-44-53-410-050-A
[Rev.10 from 2021]
2026.03.31 23:51:41 UTC
Installation of the THS Actuator Motor
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:
PRESSURIZE ONLY THE HYDRAULIC SYSTEM(S) THAT IS (ARE) NECESSARY FOR THE TASK. ISOLATE THE OTHER HYDRAULIC SYSTEM(S) BEFORE YOU SUPPLY HYDRAULIC POWER TO THE AIRCRAFT.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 310
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)- ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 0.5 and 0.4 m.daN (44.25 and 35.40 lbf.in )  | |
| 0U145413 | 1 | CONE-MOUNTING,THS ACTUATOR |
| 0U145414 | 1 | RING-SHRINKING,THS ACTUATOR |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.03LDA1) | Grease-Hydraulic Systems - - |
| (Material No.08BBB1) | Non Aqueous Cleaner-- Petroleum Based - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 310 | FUSLG TAIL SECTION AFT OF AFT PRESS BHD |
| 312AR |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 11 | O-RINGS | AIPC 27-44-51-03-030 |
| 10 | BACK-UP RINGS | AIPC 27-44-51-03-040 |
| 17 | O-RINGS | AIPC 27-44-51-03-070 |
| 16 | BACK-UP RINGS | AIPC 27-44-51-03-080 |
| 14 | O-RINGS | AIPC 27-44-51-03-100 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-13-27-612-001-A | Oil Replenishment of the THS Actuator |
| TASK 27-41-00-720-001-A | Functional Test of the THS-Actuator Overtravel Related to the Mechanical Indicator |
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 29-00-00-910-002-A | Safety Procedures of the Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
THS Actuator MotorSubtask 27-44-53-860-051-A
A. Aircraft Maintenance Configuration
(2) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below the access door 312AR.
(3) Make sure that the access door 312AR is open.
(4) Make sure that the warning notices are in position in the cockpit to tell persons not to operate the pitch controls.
(5) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(6) Make sure that the reservoirs of the Green and Yellow hydraulic systems are depressurized.
(Ref. AMM TASK 29-14-00-614-001).
(7) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Green, the Yellow and the Blue hydraulic systems:
Subtask 27-44-53-865-052-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.
WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002). (2) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below the access door 312AR.
(3) Make sure that the access door 312AR is open.
(4) Make sure that the warning notices are in position in the cockpit to tell persons not to operate the pitch controls.
(5) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(6) Make sure that the reservoirs of the Green and Yellow hydraulic systems are depressurized.
(Ref. AMM TASK 29-14-00-614-001).
(7) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Green, the Yellow and the Blue hydraulic systems:
- in the cockpit on the hydraulic section 40VU of the overhead panel,
- on the ground service panels of the Green, Yellow and Blue hydraulic systems.
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 27-44-53-210-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B09 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B04 |
| ** ON A/C ALL | |||
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT3 | 19CE3 | Q17 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT1 | 19CE1 | Q16 |
C. Visual Inspection
(1) Clean the interface of the THS actuator motor (2) with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and let it dry.
(2) Clean the interface of the THS actuator (1) with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and let it dry.
(3) Make sure that the subsequent components are clean, have no corrosion and show no damage:
4. Procedure(1) Clean the interface of the THS actuator motor (2) with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and let it dry.
(2) Clean the interface of the THS actuator (1) with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and let it dry.
(3) Make sure that the subsequent components are clean, have no corrosion and show no damage:
- the interface of the THS actuator (1),
- the splined shaft (20),
- the screws (7),
- the expansion plugs (12),(18),
- the spacer tubes (13),(15),(19),
Subtask 27-44-53-560-050-A
A. Preparation of the Replacement Components
(1) Install the spacer tube assemblies (3),(4),(5).
(3) Remove the blanking caps from the ends of the spacer tubes (13),(15),(19).
(4) Install the spacer tube assembly (4).
(a) Apply Grease-Hydraulic Systems - - (Material No.03LDA1) to the AIPC 27-44-51-03-100 O-RINGS (14).
(b) Put the O-rings (14) in position at each end of the spacer tube (15).
(c) Put the spacer tube assembly (4) in position in the base plate of the motor (2).
(5) Install the spacer tube assembly (3).
(a) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR and the 0U145414 RING-SHRINKING,THS ACTUATOR to put the AIPC 27-44-51-03-040 BACK-UP RINGS (10) in position at each end of the spacer tube (13).
(b) Apply Grease-Hydraulic Systems - - (Material No.03LDA1) to the AIPC 27-44-51-03-030 O-RINGS (11).
(c) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR and put two O-rings (11) in position at each end of the spacer tube (13).
(d) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR and the 0U145414 RING-SHRINKING,THS ACTUATOR to put a second back-up ring (10) in position at each end of the spacer tube (13).
(e) Put the expansion plug (12) in position in the base plate of the motor (2).
(f) Put the spacer tube assembly (3) on the expansion plug (12).
(6) Install the spacer tube assembly (5).
(a) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR and the 0U145414 RING-SHRINKING,THS ACTUATOR to put the AIPC 27-44-51-03-080 BACK-UP RINGS (16) in position at each end of the spacer tube (19).
(b) Apply Grease-Hydraulic Systems - - (Material No.03LDA1) to the AIPC 27-44-51-03-070 O-RINGS (17).
(c) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR and put two O-rings (17) in position at each end of the spacer tube (19).
(d) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR ant the 0U145414 RING-SHRINKING,THS ACTUATOR to put a second back-up ring (16) in position at each end of the spacer tube (19).
(e) Put the expansion plug (18) in position in the base plate of the motor (2).
(f) Put the spacer tube assembly (5) on the expansion plug (18).
Subtask 27-44-53-420-050-A (1) Install the spacer tube assemblies (3),(4),(5).
NOTE: The two THS actuator motors (2) are the same. The installation of one of the motors (2) only is given.
(2) Remove the blanking plugs from the ports of the valve block unit (6). (3) Remove the blanking caps from the ends of the spacer tubes (13),(15),(19).
(4) Install the spacer tube assembly (4).
(a) Apply Grease-Hydraulic Systems - - (Material No.03LDA1) to the AIPC 27-44-51-03-100 O-RINGS (14).
(b) Put the O-rings (14) in position at each end of the spacer tube (15).
(c) Put the spacer tube assembly (4) in position in the base plate of the motor (2).
(5) Install the spacer tube assembly (3).
(a) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR and the 0U145414 RING-SHRINKING,THS ACTUATOR to put the AIPC 27-44-51-03-040 BACK-UP RINGS (10) in position at each end of the spacer tube (13).
(b) Apply Grease-Hydraulic Systems - - (Material No.03LDA1) to the AIPC 27-44-51-03-030 O-RINGS (11).
(c) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR and put two O-rings (11) in position at each end of the spacer tube (13).
(d) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR and the 0U145414 RING-SHRINKING,THS ACTUATOR to put a second back-up ring (10) in position at each end of the spacer tube (13).
(e) Put the expansion plug (12) in position in the base plate of the motor (2).
(f) Put the spacer tube assembly (3) on the expansion plug (12).
(6) Install the spacer tube assembly (5).
(a) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR and the 0U145414 RING-SHRINKING,THS ACTUATOR to put the AIPC 27-44-51-03-080 BACK-UP RINGS (16) in position at each end of the spacer tube (19).
(b) Apply Grease-Hydraulic Systems - - (Material No.03LDA1) to the AIPC 27-44-51-03-070 O-RINGS (17).
(c) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR and put two O-rings (17) in position at each end of the spacer tube (19).
(d) Use the 0U145413 CONE-MOUNTING,THS ACTUATOR ant the 0U145414 RING-SHRINKING,THS ACTUATOR to put a second back-up ring (16) in position at each end of the spacer tube (19).
(e) Put the expansion plug (18) in position in the base plate of the motor (2).
(f) Put the spacer tube assembly (5) on the expansion plug (18).
B. Installation of the THS Actuator Motor
(1) Put the motor (2) in position on the splined shaft (20).
(a) Make sure that the splined shaft (20) engages easily with the internal splines of the motor (2).
(2) Carefully engage the ends of the spacer tube assemblies (3), (4) and (5) in the valve block (6).
(3) Install the screws (7) and the washers (8) in the motor (2).
(4) TORQUE the screws (7) to between 0.5 and 0.4 m.daN (44.25 and 35.40 lbf.in ).
Subtask 27-44-53-080-050-A (1) Put the motor (2) in position on the splined shaft (20).
(a) Make sure that the splined shaft (20) engages easily with the internal splines of the motor (2).
(2) Carefully engage the ends of the spacer tube assemblies (3), (4) and (5) in the valve block (6).
(3) Install the screws (7) and the washers (8) in the motor (2).
(4) TORQUE the screws (7) to between 0.5 and 0.4 m.daN (44.25 and 35.40 lbf.in )
. C. Preparation for Test
(1) Make sure that the THS actuator (9CE) has the correct quantity of oil (Ref. AMM TASK 12-13-27-612-001).
(2) Do a visual check and make sure that:
Subtask 27-44-53-865-051-A (1) Make sure that the THS actuator (9CE) has the correct quantity of oil (Ref. AMM TASK 12-13-27-612-001).
(2) Do a visual check and make sure that:
- the travel range of the THS actuator,
- the travel ranges of the control surfaces,
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 27-44-53-720-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B09 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B04 |
| ** ON A/C ALL | |||
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT3 | 19CE3 | Q17 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT1 | 19CE1 | Q16 |
E. Test
(1) Do a functional test of the THS control (Ref. AMM TASK 27-41-00-720-001).
(2) Examine the THS actuator (9CE) and make sure that there is no leakage.
5. Close-up(1) Do a functional test of the THS control (Ref. AMM TASK 27-41-00-720-001).
(2) Examine the THS actuator (9CE) and make sure that there is no leakage.
Subtask 27-44-53-410-050-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 312AR.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 312AR.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).