DOC AIRBUS | AMM A320FCheck of the Rudder Servo Controls and Hinge Bearings for Excessive Play and Condition
TASK 27-24-00-200-001-A
Check of the Rudder Servo Controls and Hinge Bearings for Excessive Play and Condition
Refer to the MPD TASK: 272400-02
CHECK RUDDER SERVOCONTROL AND HINGE BEARINGS FOR EXCESSIVE PLAY AND CONDITION
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 27-24-00-861-053-A Subtask 27-24-00-010-052-A
Subtask 27-24-00-210-050-A
Subtask 27-24-00-942-052-A
[Rev.10 from 2021]
2026.03.31 23:49:22 UTC
Check of the Rudder Servo Controls and Hinge Bearings for Excessive Play and Condition
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:
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: 272400-02
CHECK RUDDER SERVOCONTROL AND HINGE BEARINGS FOR EXCESSIVE PLAY AND CONDITION
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 325 | VERTICAL STABILIZER TRAILING EDGE |
| 325BL, 325BR, 325CL, 325CR, 325DL, 325DR, 325EL, 325ER |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| TASK 27-24-00-200-002-A | Check of the Rudder Trailing Edge Play |
| TASK 27-24-51-000-001-A | Removal of the Rudder Servo Control |
| TASK 27-24-51-200-001-A | Check of the Rudder Servo-Control Attachments |
| TASK 27-24-51-400-001-A | Installation of the Rudder Servo Control |
| TASK 29-10-00-863-003-A | Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart |
| TASK 29-10-00-863-003-A-01 | Pressurize the Blue Hydraulic System with the Blue Electric Pump |
| TASK 29-10-00-864-003-A | Depressurize the Blue Hydraulic System |
| TASK 29-23-00-863-001-A | Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump |
| TASK 29-23-00-864-001-A | Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU |
| TASK 29-24-00-863-001-A | Pressurize the Yellow Hydraulic System with the Electric Pump |
| TASK 29-24-00-864-001-A | Depressurize the Yellow Hydraulic System |
| TASK 55-46-00-200-001-A | Inspection of the Rudder Hinge Line Fittings 1 to 7 for Wear |
| TASK 55-46-11-000-001-A | Removal of Rudder Hinge Bearing No. 6 |
| TASK 55-46-11-400-001-A | Installation of Rudder Hinge Bearing No. 6 |
| TSM 27-20-00-810-802 | Airframe Vibration due to the Rudder |
| SRM 553642 |
Subtask 27-24-00-861-053-A Subtask 27-24-00-010-052-A
B. Get Access
(1) Put an ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE in position at zone 325.
(2) Open the access doors 325BL 325BR 325CL 325CR 325DL 325DR 325EL 325ER.
Subtask 27-24-00-860-050-A (1) Put an ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE in position at zone 325.
(2) Open the access doors 325BL 325BR 325CL 325CR 325DL 325DR 325EL 325ER.
C. Aircraft maintenance configuration
(1) Pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-23-00-863-001) (Ref. AMM TASK 29-24-00-863-001) (Ref. AMM TASK 29-10-00-863-003).
(2) On the HYD section of the maintenance panel 50VU :
Subtask 27-24-00-941-050-A (1) Pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-23-00-863-001) (Ref. AMM TASK 29-24-00-863-001) (Ref. AMM TASK 29-10-00-863-003).
(2) On the HYD section of the maintenance panel 50VU :
- release the LEAK MEASUREMENT VALVES/B and LEAK MEASUREMENT VALVES/Y pushbutton switches (the OFF legends of these pushbutton switches come on).
D. Safety Precautions
(1) Put WARNING NOTICE(S) on the pedals (CAPT and F/O) to tell persons not to operate them.
(2) Put WARNING NOTICE(S) on the panel 110VU to tell persons not to use the rudder trim.
4. Procedure(1) Put WARNING NOTICE(S) on the pedals (CAPT and F/O) to tell persons not to operate them.
(2) Put WARNING NOTICE(S) on the panel 110VU to tell persons not to use the rudder trim.
Subtask 27-24-00-210-050-A
A. Check of the Rudder Servo Controls and Hinge Bearings for General Condition
(1) Make sure that the rods and the bellcranks are in the correct condition.
(2) Make sure that the liner is in the correct position in the housing of the ball bearings (no movement of the liner).
Subtask 27-24-00-220-050-A ** ON A/C NOT FOR ALL (1) Make sure that the rods and the bellcranks are in the correct condition.
(2) Make sure that the liner is in the correct position in the housing of the ball bearings (no movement of the liner).
NOTE: The liner is a layer of Teflon between the bearing case and the ball. It lets the ball turn with a minimum of friction (self-lubricating).
(a) If you can see the liner, replace:- The related servo control (Ref. AMM TASK 27-24-51-000-001) and (Ref. AMM TASK 27-24-51-400-001), or
- The hinge arm end-fitting (1 to 5 or 7) SRM 553642, or
- Hinge bearing No. 6 (Ref. AMM TASK 55-46-11-000-001) and (Ref. AMM TASK 55-46-11-400-001).
NOTE: If the rod end of the rudder servo control has a grease nipple (regreasable roller bearing), there is no liner.
B. Check of the Rudder Trailing Edge Play
(2) For each servo control (Green, Yellow or Blue hydraulic system pressurized), if the distance is more than 16 mm (0.6299 in.):
(a) Replace the related rudder servo control (Ref. AMM TASK 27-24-51-000-001) (Ref. AMM TASK 27-24-51-400-001).
(b) Do a check of the rudder trailing edge play (Ref. AMM TASK 27-24-00-200-002).
(c) For each servo control (Green, Yellow or Blue hydraulic system pressurized), if the distance stays more than 16 mm (0.6299 in.), do a check of the related servo control fitting (Ref. AMM TASK 27-24-51-200-001).
(d) Do a check of the rudder trailing edge play (Ref. AMM TASK 27-24-00-200-002).
(e) For each servo control (Green, Yellow or Blue hydraulic system pressurized), if the distance stays more than 16 mm (0.6299 in.), do a check of the related rudder fitting (Ref. AMM TASK 55-46-00-200-001).
Subtask 27-24-00-220-050-E ** ON A/C NOT FOR ALL NOTE: For monitoring and follow up of the play at the rudder trailing edge, it is recommended that the operator record in its own documentation the values measured.
NOTE: The maximum play of 16 mm (0.6299 in.) prevents metal-to-metal contact in the self-lubrication bearing but does not always prevent rudder vibration.
If there is rudder vibration when the play is less than 16 mm (0.6299 in.), refer to the procedure for Airframe Vibration TSM 27-20-00-810-802.
(1) Do a check of the rudder trailing edge play (Ref. AMM TASK 27-24-00-200-002). If there is rudder vibration when the play is less than 16 mm (0.6299 in.), refer to the procedure for Airframe Vibration TSM 27-20-00-810-802.
(2) For each servo control (Green, Yellow or Blue hydraulic system pressurized), if the distance is more than 16 mm (0.6299 in.):
(a) Replace the related rudder servo control (Ref. AMM TASK 27-24-51-000-001) (Ref. AMM TASK 27-24-51-400-001).
(b) Do a check of the rudder trailing edge play (Ref. AMM TASK 27-24-00-200-002).
(c) For each servo control (Green, Yellow or Blue hydraulic system pressurized), if the distance stays more than 16 mm (0.6299 in.), do a check of the related servo control fitting (Ref. AMM TASK 27-24-51-200-001).
(d) Do a check of the rudder trailing edge play (Ref. AMM TASK 27-24-00-200-002).
(e) For each servo control (Green, Yellow or Blue hydraulic system pressurized), if the distance stays more than 16 mm (0.6299 in.), do a check of the related rudder fitting (Ref. AMM TASK 55-46-00-200-001).
NOTE: This 16 mm (0.6299 in.) value includes 8 mm (0.3150 in.) of surface bending as the result of the 30 daN (67.4427 lbf) force.
B. Check of the Rudder Trailing Edge Play
(2) For each servo control (Green, Yellow or Blue hydraulic system pressurized), if the distance is more than 12 mm (0.4724 in.):
(a) Do a check of the related rudder hinge fitting (Ref. AMM TASK 55-46-00-200-001).
(b) Do again a check of the rudder trailing edge play (Ref. AMM TASK 27-24-00-200-002).
5. Close-upNOTE: For monitoring and follow up of the play at the rudder trailing edge, it is recommended that the operator record in its own documentation the values measured.
NOTE: The maximum play of 12 mm (0.4724 in.) prevents metal-to-metal contact in the self-lubrication bearing but does not always prevent rudder vibration.
If there is rudder vibration when the play is less than 12 mm (0.4724 in.), refer to the procedure for Airframe Vibration TSM 27-20-00-810-802.
If there is rudder vibration when the play is less than 12 mm (0.4724 in.), refer to the procedure for Airframe Vibration TSM 27-20-00-810-802.
NOTE: This 12 mm (0.4724 in.) value includes 8 mm (0.3150 in.) of surface bending as the result of the 30 daN (67.4427 lbf) force.
(1) Do a check of the rudder trailing edge play (Ref. AMM TASK 27-24-00-200-002). (2) For each servo control (Green, Yellow or Blue hydraulic system pressurized), if the distance is more than 12 mm (0.4724 in.):
(a) Do a check of the related rudder hinge fitting (Ref. AMM TASK 55-46-00-200-001).
(b) Do again a check of the rudder trailing edge play (Ref. AMM TASK 27-24-00-200-002).
NOTE: The play must be decreased to 11 mm or less. If not, it stays a residual clearance that must be decreased in the steps that follow.
1 If the distance stays more than 11 mm (0.4331 in.): - Replace the related rudder servo control (Ref. AMM TASK 27-24-51-000-001) and (Ref. AMM TASK 27-24-51-400-001).
- Do again a check of the rudder trailing edge play (Ref. AMM TASK 27-24-00-200-002).
- Do a check of the related servo control fitting (Ref. AMM TASK 27-24-51-200-001).
Subtask 27-24-00-942-052-A
A. Put the aircraft back to its initial configuration
(1) On the HYD section of the maintenance panel 50VU:
(3) Remove the WARNING NOTICE(S).
(4) Make sure that the work area is clean and clear of tools and other items.
Subtask 27-24-00-410-050-A (1) On the HYD section of the maintenance panel 50VU:
- push the LEAK MEASUREMENT VALVES/B and LEAK MEASUREMENT VALVES/Y pushbutton switches (the OFF legends of these pushbutton switches go off).
(3) Remove the WARNING NOTICE(S).
(4) Make sure that the work area is clean and clear of tools and other items.
B. Close Access
(1) Close the access doors 325BL 325BR 325CL 325CR 325DL 325DR 325EL 325ER.
(2) Remove the access platform(s).
Subtask 27-24-00-862-052-A (1) Close the access doors 325BL 325BR 325CL 325CR 325DL 325DR 325EL 325ER.
(2) Remove the access platform(s).