DOC AIRBUS | AMM A320FAdjustment of the Rudder Neutral Position
TASK 27-24-00-820-001-A
Adjustment of the Rudder Neutral Position
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 27-24-00-861-054-A ** ON A/C NOT FOR ALL Subtask 27-24-00-010-055-A ** ON A/C NOT FOR ALL
Subtask 27-24-00-420-050-A ** ON A/C NOT FOR ALL
Subtask 27-24-00-860-054-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.03.31 23:49:18 UTC
Adjustment of the Rudder Neutral Position
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:
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.
CAUTION:
DO THIS PROCEDURE IN A HANGAR IF THERE ARE WIND GUSTS. WIND GUSTS CAN CAUSE DAMAGE TO THE LINKAGE WHEN THE RIGGING PINS ARE IN POSITION ON THE RUDDER CONTROL.
ZONE: 325
1. Reason for the JobNOTE: This task can contribute to fuel savings.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE |
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| 98D27203001000 | 1 | TOOL-RUDDER NEUTRAL ADJUSTMENT |
| 98D27207516000 | 1 | PIN-RIGGING,SET |
| OR | OR | |
| 98D27207546000 | 1 | PIN-RIGGING |
| 98D27303000001 | 1 | LOAD,APPLICATION TOOL-ELEVATOR, AILERON, RUDDER |
| REFERENCE | DESIGNATION |
|---|---|
| No specific | lockwire - corrosion resistant steel dia. 0.8 mm (0.03 in.) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 325 | VERTICAL STABILIZER TRAILING EDGE |
| 197CB, 197EB, 198CB, 325CL, 325CR, 325DL, 822 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 11-00-00-960-001-A | Replacement of the Tail Cone Reference Triangle |
| 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 27-21-00-820-003-A | Adjustment of the Rudder Mechanical Control |
| TASK 27-24-00-710-001-A | Operational Test of the Rudder Hydraulic Actuation |
| TASK 27-25-00-820-001-A | Adjustment of the Rudder Position Indicating |
| 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 55-33-13-010-002-A | Opening/Removal of the Trailing Edge Access-Panels of the Vertical Stabilizer |
| TASK 55-33-13-410-002-A | Closing/Installation of the Trailing Edge Access-Panels of the Vertical Stabilizer |
Rudder ControlSubtask 27-24-00-861-054-A ** ON A/C NOT FOR ALL Subtask 27-24-00-010-055-A ** ON A/C NOT FOR ALL
B. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 822.
(2) Open the access door 822.
(3) At the battery power center 105VU:
Subtask 27-24-00-865-050-A ** ON A/C NOT FOR ALL (1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 822.
(2) Open the access door 822.
(3) At the battery power center 105VU:
- loosen the two screws and remove the protective cover.
C. Make sure that this(these) circuit breaker(s) is(are) closed:
Subtask 27-24-00-860-059-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B08 |
| 49VU | AUTO FLT/FAC1/28VDC | 5CC1 | B04 |
| 49VU | AUTO FLT/FAC1/26VAC | 14CC1 | B03 |
| 105VU | FLIGHT CONTROLS/ELAC2/STBY SPLY | 16CE2 | A02 |
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 121VU | AUTO FLT/RUDDER/TRIM/IND | 15CC | M20 |
| 121VU | AUTO FLT/FAC2/28VDC | 5CC2 | M19 |
| 121VU | AUTO FLT/FAC2/26VAC | 14CC2 | M18 |
| 121VU | FLIGHT CONTROLS/SEC3/SPLY | 21CE3 | Q19 |
| 121VU | FLIGHT CONTROLS/SEC2/SPLY | 21CE2 | Q18 |
| 121VU | FLIGHT CONTROLS/ELAC2/NORM/SPLY | 15CE2 | R20 |
D. Aircraft Maintenance Configuration
(1) Pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-24-00-863-001) (Ref. AMM TASK 29-23-00-863-001) (Ref. AMM TASK 29-10-00-863-003).
(2) On the overhead panel 23VU, make sure that:
(5) Put the WARNING NOTICE(S) in the cockpit to tell persons not to operate the flight controls.
(6) Depressurize the aircraft hydraulic systems
(Ref. AMM TASK 29-10-00-864-003) (Ref. AMM TASK 29-23-00-864-001) (Ref. AMM TASK 29-24-00-864-001).
Subtask 27-24-00-010-054-E ** ON A/C NOT FOR ALL (1) Pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-24-00-863-001) (Ref. AMM TASK 29-23-00-863-001) (Ref. AMM TASK 29-10-00-863-003).
(2) On the overhead panel 23VU, make sure that:
- the FLT CTL/FAC1, FLT CTL/ELAC1 and FLT CTL/SEC1 pushbutton switches are pushed (on these pushbutton switches, the FAULT and OFF legends are off).
- the FLT CTL/FAC2, FLT CTL/ELAC2, FLT CTL/SEC2 and FLT CTL/SEC3 pushbutton switches are pushed (on these pushbutton switches, the FAULT and OFF legends are off).
(5) Put the WARNING NOTICE(S) in the cockpit to tell persons not to operate the flight controls.
(6) Depressurize the aircraft hydraulic systems
(Ref. AMM TASK 29-10-00-864-003) (Ref. AMM TASK 29-23-00-864-001) (Ref. AMM TASK 29-24-00-864-001).
E. Get Access
(1) Put an ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE in position at zone 325.
(2) Open the access panels 325CL 325CR 325DL (Ref. AMM TASK 55-33-13-010-002).
Subtask 27-24-00-860-053-A ** ON A/C NOT FOR ALL (1) Put an ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE in position at zone 325.
(2) Open the access panels 325CL 325CR 325DL (Ref. AMM TASK 55-33-13-010-002).
F. Aircraft Maintenance Configuration
(1) Install the 98D27207546000 PIN-RIGGING98D27207516000 PIN-RIGGING,SET (7) on the output bellcrank of the lower servocontrol (4).
(a) If you cannot put the rigging pin in position easily, do the adjustment of the rudder mechanical control (Ref. AMM TASK 27-21-00-820-003).
(2) Install the pointer of the 98D27303000001 LOAD,APPLICATION TOOL-ELEVATOR, AILERON, RUDDER on the trailing edge of the rudder.
(3) Pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-24-00-863-001) (Ref. AMM TASK 29-23-00-863-001) (Ref. AMM TASK 29-10-00-863-003).
4. Procedure(1) Install the 98D27207546000 PIN-RIGGING98D27207516000 PIN-RIGGING,SET (7) on the output bellcrank of the lower servocontrol (4).
(a) If you cannot put the rigging pin in position easily, do the adjustment of the rudder mechanical control (Ref. AMM TASK 27-21-00-820-003).
(2) Install the pointer of the 98D27303000001 LOAD,APPLICATION TOOL-ELEVATOR, AILERON, RUDDER on the trailing edge of the rudder.
(3) Pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-24-00-863-001) (Ref. AMM TASK 29-23-00-863-001) (Ref. AMM TASK 29-10-00-863-003).
Subtask 27-24-00-420-050-A ** ON A/C NOT FOR ALL
A. Installation of the Reference Triangle for the Rudder Neutral Position
(a) Pressurize one of the two servocontrols adjusted correctly.
1 On the maintenance panel 50VU:
Make sure that the HYD/LEAK MEASUREMENT VALVES/ applicable pushbutton switch is pushed (on this pushbutton switch the OFF legend is off):
(b) Make a mark on the tail cone structure to show the position of the rudder lower trailing edge.
(c) Pressurize the other servocontrol adjusted correctly and depressurize the first one:
1 On the maintenance panel 50VU:
Push the HYD/LEAK MEASUREMENT VALVES/ applicable pushbutton switch (on this pushbutton switch the OFF legend goes off):
(d) Make sure that the rudder neutral position for this servocontrol is the same as the rudder neutral position for the other servocontrol. The rudder lower trailing-edge must be in line with the mark on the tail cone.
(a) Depressurize the aircraft hydraulic systems (Ref. AMM TASK 29-10-00-864-003) (Ref. AMM TASK 29-23-00-864-001) (Ref. AMM TASK 29-24-00-864-001).
(b) Put the WARNING NOTICE(S) to tell persons not to pressurize the aircraft hydraulic systems:
(c) On the LH side of the rudder, put the 98D27203001000 TOOL-RUDDER NEUTRAL ADJUSTMENT in position.
(d) Use the tool to make the reference mark on the tail cone. If necessary, remove all the other marks on the tail cone.
(3) Install the new reference triangle (8) on the tail cone, put its center on the mark (Ref. AMM TASK 11-00-00-960-001).
(4) Remove the 98D27203001000 TOOL-RUDDER NEUTRAL ADJUSTMENT (if applicable).
(5) If necessary, remove the warning notices which tell persons not to pressurize the aircraft hydraulic systems.
(6) If necessary, pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-24-00-863-001) (Ref. AMM TASK 29-23-00-863-001).
Subtask 27-24-00-820-050-A ** ON A/C NOT FOR ALL NOTE: Do this installation only if the reference triangle on the tail cone is not in position.
NOTE: If the initial adjustment of two servocontrols at least is not changed, you can find the rudder neutral position without a tool.
If two or three servocontrols are not adjusted correctly, you must use the 98D27203001000 TOOL-RUDDER NEUTRAL ADJUSTMENT to find the rudder neutral position.
(1) Find the rudder neutral position with two servocontrols adjusted correctly. If two or three servocontrols are not adjusted correctly, you must use the 98D27203001000 TOOL-RUDDER NEUTRAL ADJUSTMENT to find the rudder neutral position.
(a) Pressurize one of the two servocontrols adjusted correctly.
1 On the maintenance panel 50VU:
Make sure that the HYD/LEAK MEASUREMENT VALVES/ applicable pushbutton switch is pushed (on this pushbutton switch the OFF legend is off):
- for the lower servocontrol (4): G pushbutton switch
- for the middle servocontrol (3): Y pushbutton switch
- for the upper servocontrol (2): B pushbutton switch.
(b) Make a mark on the tail cone structure to show the position of the rudder lower trailing edge.
(c) Pressurize the other servocontrol adjusted correctly and depressurize the first one:
1 On the maintenance panel 50VU:
Push the HYD/LEAK MEASUREMENT VALVES/ applicable pushbutton switch (on this pushbutton switch the OFF legend goes off):
- for the lower servocontrol (4): G pushbutton switch
- for the middle servocontrol (3): Y pushbutton switch
- for the upper servocontrol (2): B pushbutton switch.
(d) Make sure that the rudder neutral position for this servocontrol is the same as the rudder neutral position for the other servocontrol. The rudder lower trailing-edge must be in line with the mark on the tail cone.
NOTE: If the rudder neutral position is the same for the two servocontrols, it is not necessary to use the 98D27203001000 TOOL-RUDDER NEUTRAL ADJUSTMENT.
If the rudder neutral position is not the same for the two servocontrols, you must use the 98D27203001000 TOOL-RUDDER NEUTRAL ADJUSTMENT.
(2) Find the rudder neutral position with the 98D27203001000 TOOL-RUDDER NEUTRAL ADJUSTMENT: If the rudder neutral position is not the same for the two servocontrols, you must use the 98D27203001000 TOOL-RUDDER NEUTRAL ADJUSTMENT.
(a) Depressurize the aircraft hydraulic systems (Ref. AMM TASK 29-10-00-864-003) (Ref. AMM TASK 29-23-00-864-001) (Ref. AMM TASK 29-24-00-864-001).
(b) Put the WARNING NOTICE(S) to tell persons not to pressurize the aircraft hydraulic systems:
(c) On the LH side of the rudder, put the 98D27203001000 TOOL-RUDDER NEUTRAL ADJUSTMENT in position.
(d) Use the tool to make the reference mark on the tail cone. If necessary, remove all the other marks on the tail cone.
(3) Install the new reference triangle (8) on the tail cone, put its center on the mark (Ref. AMM TASK 11-00-00-960-001).
(4) Remove the 98D27203001000 TOOL-RUDDER NEUTRAL ADJUSTMENT (if applicable).
(5) If necessary, remove the warning notices which tell persons not to pressurize the aircraft hydraulic systems.
(6) If necessary, pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-24-00-863-001) (Ref. AMM TASK 29-23-00-863-001).
B. Adjustment of the Rudder Neutral Position with the reference triangle (8).
(1) On the maintenance panel 50VU:
(a) Release the HYD/LEAK MEASUREMENT VALVES/B and HYD/LEAK MEASUREMENT VALVES/Y pushbutton switches (on these pushbutton switches, the OFF legends come on).
(b) Make sure that the HYD/LEAK MEASUREMENT VALVES/G pushbutton switch is pushed (on this pushbutton switch the OFF legend is off).
(2) On the tail cone structure, make sure that the rudder lower trailing-edge is in line with the center of gravity of the reference triangle (8) or in the limits.
If not, do these operations:
(a) Cut and remove the lockwire from the nuts of the spring rod (5).
(b) Loosen the nuts.
(c) Release the lockwashers.
(d) Adjust the length of the spring rod (5).
(e) Engage the lockwashers.
(f) Tighten the nuts.
(g) Make sure that the adjustment is correct after you have tightened the nuts.
(h) Safety the nuts with lockwire - corrosion resistant steel dia. 0.8 mm (0.03 in.).
(3) On the maintenance panel 50VU:
(a) Push the HYD/LEAK MEASUREMENT VALVES/Y pushbutton switch (on this pushbutton switch the OFF legend goes off).
(b) Release the HYD/LEAK MEASUREMENT VALVES/G pushbutton switch (on this pushbutton switch the OFF legend comes on).
(4) On the tail cone structure make sure that the rudder lower trailing-edge is in line with the center of gravity of the reference triangle (8) or in the limits.
If not, do these operations:
(a) Cut and remove the lockwire from the nuts of the spring rod (6).
(b) Loosen the nuts.
(c) Release the lockwashers.
(d) Adjust the length of the spring rod (6).
(f) Tighten the nuts.
(g) Make sure that the adjustment is correct after you have tightened the nuts.
(h) Safety the nuts with lockwire - corrosion resistant steel dia. 0.8 mm (0.03 in.).
(5) On the maintenance panel 50VU:
(a) Push the HYD/LEAK MEASUREMENT VALVES/B pushbutton switch (on this pushbutton switch the OFF legend goes off).
(b) Release the HYD/LEAK MEASUREMENT VALVES/Y pushbutton switch (on this pushbutton switch the OFF legend comes on).
(6) On the tail cone structure make sure that the rudder lower trailing-edge is in line with the center of gravity of the reference triangle (8) or in the limits.
If not, do these operations:
(a) Cut and remove the lockwire from the nuts of the spring rod (1).
(b) Loosen the nuts.
(c) Release the lockwashers.
(d) Adjust the length of the spring rod (1).
(f) Tighten the nuts.
(g) Make sure that the adjustment is correct after you have tightened the nuts.
(h) Safety the nuts with lockwire - corrosion resistant steel dia. 0.8 mm (0.03 in.).
(7) On the maintenance panel 50VU:
If not, do the adjustment of the spring rods (1), (6) and (5) of the three servocontrols (2), (3) and (4).
(9) Make sure that you can engage and disengage freely the rigging pin in the rudder position transducer unit.
5. Close-up(1) On the maintenance panel 50VU:
(a) Release the HYD/LEAK MEASUREMENT VALVES/B and HYD/LEAK MEASUREMENT VALVES/Y pushbutton switches (on these pushbutton switches, the OFF legends come on).
(b) Make sure that the HYD/LEAK MEASUREMENT VALVES/G pushbutton switch is pushed (on this pushbutton switch the OFF legend is off).
(2) On the tail cone structure, make sure that the rudder lower trailing-edge is in line with the center of gravity of the reference triangle (8) or in the limits.
If not, do these operations:
(a) Cut and remove the lockwire from the nuts of the spring rod (5).
(b) Loosen the nuts.
(c) Release the lockwashers.
(d) Adjust the length of the spring rod (5).
(e) Engage the lockwashers.
(f) Tighten the nuts.
(g) Make sure that the adjustment is correct after you have tightened the nuts.
(h) Safety the nuts with lockwire - corrosion resistant steel dia. 0.8 mm (0.03 in.).
(3) On the maintenance panel 50VU:
(a) Push the HYD/LEAK MEASUREMENT VALVES/Y pushbutton switch (on this pushbutton switch the OFF legend goes off).
(b) Release the HYD/LEAK MEASUREMENT VALVES/G pushbutton switch (on this pushbutton switch the OFF legend comes on).
(4) On the tail cone structure make sure that the rudder lower trailing-edge is in line with the center of gravity of the reference triangle (8) or in the limits.
If not, do these operations:
(a) Cut and remove the lockwire from the nuts of the spring rod (6).
(b) Loosen the nuts.
(c) Release the lockwashers.
(d) Adjust the length of the spring rod (6).
NOTE: To adjust the clearance, turn the spring rod (6) in the same direction as the spring rod (5).
(e) Engage the lockwashers. (f) Tighten the nuts.
(g) Make sure that the adjustment is correct after you have tightened the nuts.
(h) Safety the nuts with lockwire - corrosion resistant steel dia. 0.8 mm (0.03 in.).
(5) On the maintenance panel 50VU:
(a) Push the HYD/LEAK MEASUREMENT VALVES/B pushbutton switch (on this pushbutton switch the OFF legend goes off).
(b) Release the HYD/LEAK MEASUREMENT VALVES/Y pushbutton switch (on this pushbutton switch the OFF legend comes on).
(6) On the tail cone structure make sure that the rudder lower trailing-edge is in line with the center of gravity of the reference triangle (8) or in the limits.
If not, do these operations:
(a) Cut and remove the lockwire from the nuts of the spring rod (1).
(b) Loosen the nuts.
(c) Release the lockwashers.
(d) Adjust the length of the spring rod (1).
NOTE: To adjust the clearance, turn the spring rod (1) in the same direction as the spring rod (6).
(e) Engage the lockwashers. (f) Tighten the nuts.
(g) Make sure that the adjustment is correct after you have tightened the nuts.
(h) Safety the nuts with lockwire - corrosion resistant steel dia. 0.8 mm (0.03 in.).
(7) On the maintenance panel 50VU:
- push the HYD/LEAK MEASUREMENT VALVES/Y and HYD/LEAK MEASUREMENT VALVES/G pushbutton switches (on these pushbutton switches, the OFF legends go off).
If not, do the adjustment of the spring rods (1), (6) and (5) of the three servocontrols (2), (3) and (4).
(9) Make sure that you can engage and disengage freely the rigging pin in the rudder position transducer unit.
- If you cannot do this, do the adjustment of the rudder position indicating (Ref. AMM TASK 27-25-00-820-001).
Subtask 27-24-00-860-054-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Depressurize the aircraft hydraulic systems (Ref. AMM TASK 29-10-00-864-003) (Ref. AMM TASK 29-23-00-864-001) (Ref. AMM TASK 29-24-00-864-001).
(2) Remove the pointer of the 98D27303000001 LOAD,APPLICATION TOOL-ELEVATOR, AILERON, RUDDER from the trailing edge of the rudder.
(3) Remove the 98D27207546000 PIN-RIGGING98D27207516000 PIN-RIGGING,SET (7) from the output bellcrank of the lower servocontrol (4).
Subtask 27-24-00-410-053-E ** ON A/C NOT FOR ALL (1) Depressurize the aircraft hydraulic systems (Ref. AMM TASK 29-10-00-864-003) (Ref. AMM TASK 29-23-00-864-001) (Ref. AMM TASK 29-24-00-864-001).
(2) Remove the pointer of the 98D27303000001 LOAD,APPLICATION TOOL-ELEVATOR, AILERON, RUDDER from the trailing edge of the rudder.
(3) Remove the 98D27207546000 PIN-RIGGING98D27207516000 PIN-RIGGING,SET (7) from the output bellcrank of the lower servocontrol (4).
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access panels 325CL 325CR 325DL (Ref. AMM TASK 55-33-13-410-002).
(3) Install the protective cover on the battery power center 105VU.
(4) Tighten the two screws.
(5) Close the access door 822.
(6) Remove the access platform(s).
(7) Remove the WARNING NOTICE(S).
Subtask 27-24-00-710-052-A ** ON A/C NOT FOR ALL Subtask 27-24-00-862-053-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access panels 325CL 325CR 325DL (Ref. AMM TASK 55-33-13-410-002).
(3) Install the protective cover on the battery power center 105VU.
(4) Tighten the two screws.
(5) Close the access door 822.
(6) Remove the access platform(s).
(7) Remove the WARNING NOTICE(S).