DOC AIRBUS | AMM A320FRemoval of the Elevator Servo Control
TASK 27-34-51-000-001-A
Removal of the Elevator Servo Control
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 27-34-51-860-052-A
Subtask 27-34-51-020-059-A
[Rev.10 from 2021]
2026.03.31 23:50:24 UTC
Removal of the Elevator Servo Control
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 CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM. UNWANTED MOVEMENT OF HYDRAULICALLY OPERATED ITEMS CAN CAUSE SERIOUS INJURY AND/OR DAMAGE.
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:
YOU MUST PUT ON AND ATTACH A SAFETY HARNESS BEFORE YOU START WORK:
- ON THE THS OR IN THE REAR FUSELAGE
- ON TOP OF THE WINGS OR PYLONS.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
DO NOT CAUSE DAMAGE TO THE SURFACES. THE COMPONENTS ARE MADE OF CARBONFIBER REINFORCED PLASTIC.
NOTE: Only the removal of servo control unit 34CE1 is given. The removal servo control units 34CE2, 34CE3 and 34CE4 is the same.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE |
| No specific | AR | CAP - BLANKING |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| 98D27309001000 | 1 | NEUTRAL SETTING TOOL - ELEVATOR |
| 98D27309003000 | 1 | DEVICE - LOCKING, ELEVATOR |
| 98D27309009003 | 1 | COLLAR-DEPTH ACTUATOR |
| 98D27309009004 | 1 | COLLAR-DEPTH ACTUATOR |
| 98D27903500000 | 2 | PIN-SIDE STICK LOCKING |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 334 | THS TRAILING EDGE |
| 335 | ELEVATOR |
| 344 | THS TRAILING EDGE |
| 345 | ELEVATOR |
| 334DB, 344DB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-10-00-864-002-A | Depressurize the Yellow 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 55-13-11-000-001-A | Remove/Open of the Trimmable Horizontal Stabilizer (THS) Trailing-Edge Access-Panels |
Elevator Servo-Control UnitSubtask 27-34-51-860-052-A
A. Aircraft Maintenance Configuration
(1) Make sure that the Green, Yellow and Blue hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001), (Ref. AMM TASK 29-10-00-864-002) and (Ref. AMM TASK 29-10-00-864-003).
(2) Make sure that the hydraulic reservoirs are depressurized (Ref. AMM TASK 29-14-00-614-001).
Subtask 27-34-51-865-050-A (1) Make sure that the Green, Yellow and Blue hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001), (Ref. AMM TASK 29-10-00-864-002) and (Ref. AMM TASK 29-10-00-864-003).
(2) Make sure that the hydraulic reservoirs are depressurized (Ref. AMM TASK 29-14-00-614-001).
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 27-34-51-860-062-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| 49VU | FLIGHT CONTROLS/FCDC1/SPLY | 20CE1 | B10 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B09 |
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B08 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| 49VU | FLIGHT CONTROLS/FCDC1/SPLY | 20CE1 | B05 |
| 49VU | FLIGHT CONTROLS/THS/ACTR/MOT2 | 19CE2 | B04 |
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B03 |
| ** ON A/C ALL | |||
| 105VU | FLIGHT CONTROLS/ELAC2/STBY SPLY | 16CE2 | A02 |
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 105VU | FLT CTL/SEC1/STBY SPLY | 22CE | B01 |
| 121VU | FLIGHT CONTROLS/FCDC2/SPLY | 20CE2 | Q20 |
| 121VU | FLIGHT CONTROLS/SEC3/SPLY | 21CE3 | Q19 |
| 121VU | FLIGHT CONTROLS/SEC2/SPLY | 21CE2 | Q18 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT3 | 19CE3 | Q17 |
| 121VU | FLIGHT CONTROLS/THS ACTR/MOT1 | 19CE1 | Q16 |
| 121VU | FLIGHT CONTROLS/ELAC2/NORM/SPLY | 15CE2 | R20 |
C. Aircraft Maintenance Configuration
(1) On the center pedestal, make sure that the pitch-trim control wheels are set to 0 position.
Subtask 27-34-51-941-050-A (1) On the center pedestal, make sure that the pitch-trim control wheels are set to 0 position.
D. Safety Precautions
(1) Put WARNING NOTICE(S) on the pitch control wheels to tell persons not to move the THS.
(2) Put WARNING NOTICE(S) in the cockpit to tell persons not to operate the flight controls.
(3) Put WARNING NOTICE(S) in position to tell persons not to operate the hydraulic systems.
Subtask 27-34-51-010-050-A (1) Put WARNING NOTICE(S) on the pitch control wheels to tell persons not to move the THS.
(2) Put WARNING NOTICE(S) in the cockpit to tell persons not to operate the flight controls.
(3) Put WARNING NOTICE(S) in position to tell persons not to operate the hydraulic systems.
E. Get Access
(1) Put an ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position below the applicable zone.
(2) Open trailing-edge access panels 334DB ( 344DB) (Ref. AMM TASK 55-13-11-000-001).
Subtask 27-34-51-481-050-A (1) Put an ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position below the applicable zone.
(2) Open trailing-edge access panels 334DB ( 344DB) (Ref. AMM TASK 55-13-11-000-001).
F. Installation of the Safety Device
(1) Install the 98D27903500000 PIN-SIDE STICK LOCKING on the CAPT and the F/O side sticks.
(2) Move the elevator with your hand to the upper position.
(a) If you remove the two elevator servo controls:
1 Install the 98D27309001000 NEUTRAL SETTING TOOL - ELEVATOR.
(b) If you remove only one elevator servo control:
1 Open trailing-edge access panels 334DB ( 344DB) (Ref. AMM TASK 55-13-11-000-001).
2 Install the 98D27309009003 COLLAR-DEPTH ACTUATOR or the 98D27309009004 COLLAR-DEPTH ACTUATOR on the servo control actuator that is not removed.
4. Procedure(1) Install the 98D27903500000 PIN-SIDE STICK LOCKING on the CAPT and the F/O side sticks.
(2) Move the elevator with your hand to the upper position.
(a) If you remove the two elevator servo controls:
1 Install the 98D27309001000 NEUTRAL SETTING TOOL - ELEVATOR.
(b) If you remove only one elevator servo control:
1 Open trailing-edge access panels 334DB ( 344DB) (Ref. AMM TASK 55-13-11-000-001).
2 Install the 98D27309009003 COLLAR-DEPTH ACTUATOR or the 98D27309009004 COLLAR-DEPTH ACTUATOR on the servo control actuator that is not removed.
Subtask 27-34-51-020-059-A
A. Disconnection of the Electrical Connectors and Hydraulic Pipes
(1) Disconnect the electrical connectors:
(a) Disconnect the electrical connectors (1), (2) and (3).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(2) Disconnect the hydraulic connections:
(b) Disconnect the flexible hoses (5) and (6) from the servo control unit (4).
(c) Drain the unwanted hydraulic fluid into the container.
(d) Remove and discard the unwanted hydraulic fluid.
(e) Put blanking caps on the flexible hoses (5) and (6) and the unions of the servo control unit (4).
(f) Remove the bonding lead (7), nut (8), washer (9) and bolt (11).
Subtask 27-34-51-020-063-C (1) Disconnect the electrical connectors:
| Servo Control Unit | Electrical Connectors | ITEM | ZONE |
|---|---|---|---|
| 34CE1 | 34CE1-A | 3 | 335 |
| | 34CE1-B | 1 | |
| | 34CE1-C | 2 | |
| 34CE2 | 34CE2-A | 3 | 345 |
| | 34CE2-B | 1 | |
| | 34CE2-C | 2 | |
| 34CE3 | 34CE3-A | 3 | 335 |
| | 34CE3-B | 1 | |
| | 34CE3-C | 2 | |
| 34CE4 | 34CE4-A | 3 | 345 |
| | 34CE4-B | 1 | |
| | 34CE4-C | 2 | |
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(2) Disconnect the hydraulic connections:
WARNING:
DO NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. HYDRAULIC FLUID IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY. FLUSH HYDRAULIC FLUID FROM YOUR EYES, MOUTH OR SKIN WITH WATER. GET MEDICAL AID IF YOU GET HYDRAULIC FLUID IN YOUR EYES OR MOUTH.
CAUTION:
YOU MUST ALWAYS PUT CAPS ON DISCONNECTED HOSES AND FITTINGS. IF YOU DO NOT DO THIS, YOU MAY CAUSE:
(a) Put a CONTAINER 5 L (1.32 USGAL) below the servo controls. - CONTAMINATION OF THE HOSES,
- DAMAGE TO THE SYSTEM COMPONENTS,
- HYDRAULIC FLUID LEAKS.
(b) Disconnect the flexible hoses (5) and (6) from the servo control unit (4).
(c) Drain the unwanted hydraulic fluid into the container.
(d) Remove and discard the unwanted hydraulic fluid.
(e) Put blanking caps on the flexible hoses (5) and (6) and the unions of the servo control unit (4).
(f) Remove the bonding lead (7), nut (8), washer (9) and bolt (11).
B. Removal of the Servo Control Unit from the Elevator Attachment
(1) Disconnect the servo control unit (4) from the elevator:
(a) Remove and discard the cotter pins (20) and (25).
(b) Remove the locking cup (21), nut (22) and washer (24).
(c) Remove the bolt (17).
(d) Remove the bush (16). Make sure that you do not cause damage to it during removal.
Subtask 27-34-51-020-064-D (1) Disconnect the servo control unit (4) from the elevator:
(a) Remove and discard the cotter pins (20) and (25).
(b) Remove the locking cup (21), nut (22) and washer (24).
(c) Remove the bolt (17).
(d) Remove the bush (16). Make sure that you do not cause damage to it during removal.
NOTE: The actuator fitting of the elevator has a shouldered bush installed. It is important not to remove this shouldered bush during the removal of the bush (16).
C. Removal of the Servo Control Unit from the THS Attachment
(1) Disconnect the servo control unit (4) from the horizontal stabilizer structure:
(a) Remove and discard the cotter pin (38).
(b) Remove the locking cup (31), nut (30) and washer (41).
(c) Remove the nuts (33), washers (32), bolts (35), washers (36) and plate (37).
(2) Support the servo control unit (4).
(3) Remove the bolt (28) and the washer (29).
(4) Remove the servo control unit (4) from the aircraft.
(5) If both servo control units are removed, install the 98D27309003000 DEVICE - LOCKING, ELEVATOR.
(6) Remove the shouldered bushes (26) and (27). Make sure that you do not cause damage to them during removal.
(1) Disconnect the servo control unit (4) from the horizontal stabilizer structure:
(a) Remove and discard the cotter pin (38).
(b) Remove the locking cup (31), nut (30) and washer (41).
(c) Remove the nuts (33), washers (32), bolts (35), washers (36) and plate (37).
(2) Support the servo control unit (4).
(3) Remove the bolt (28) and the washer (29).
(4) Remove the servo control unit (4) from the aircraft.
(5) If both servo control units are removed, install the 98D27309003000 DEVICE - LOCKING, ELEVATOR.
(6) Remove the shouldered bushes (26) and (27). Make sure that you do not cause damage to them during removal.
NOTE: The actuator fitting of the THS has plain bushes installed. It is important not to remove these plain bushes during the removal of the shouldered bushes (26) and (27).