DOC AIRBUS | AMM A320FInstallation of the Yaw Damper Position Transducer Unit
TASK 27-26-17-400-001-A
Installation of the Yaw Damper Position Transducer Unit
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 27-26-17-860-052-B
Subtask 27-26-17-910-050-A
Subtask 27-26-17-410-050-B
[Rev.10 from 2021]
2026.03.31 23:49:45 UTC
Installation of the Yaw Damper Position Transducer Unit
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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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 10M (33 FT) - ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| 98D27207548000 | 1 | PIN-RIGGING |
| 98D27207549000 | 1 | PIN-RIGGING |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.03GBD1) | Synthetic Oil base Grease-General Purpose Lithium Thickened - |
| (Material No.03HBD9) | Synthetic Ester base Grease-General Purpose Low Temp - |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.12AGC2) | Corrosion Preventive Compound-- Soft Film System |
| No specific | lockwire corrosion-resistant steel 0.8 mm (0.032 in.) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 325 | VERTICAL STABILIZER TRAILING EDGE |
| 325BL, 325BR |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 14 | COTTER PINS | AIPC 27-26-04-01-050 |
| 9 | COTTER PIN | AIPC 27-26-04-01-050 |
| 14 | COTTER PINS | AIPC 27-26-84-01-010 |
| 9 | COTTER PIN | AIPC 27-26-84-01-010 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 22-63-00-710-001-A | Operational Test of the Yaw Damper Function |
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 51-75-13-916-002-A | Repair to a layer of Corrosion Preventive Compound |
| 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 |
Position Transducer UnitSubtask 27-26-17-860-052-B
A. Aircraft Maintenance Configuration
(1) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(2) Make sure that the WARNING NOTICE(S) are in position.
(3) Make sure that the rudder pedals are in the neutral position.
(4) Make sure that the RUD TRIM indicator on the panel 110VU of the center pedestal shows zero.
(5) Make sure that the FLT CTL/FAC 1 pushbutton switch on the overhead panel 23VU is released and the OFF legend is on.
(6) Make sure that the FLT CTL/FAC 2 pushbutton switch on the overhead panel 24VU is released and the OFF legend is on.
(7) Make sure that the ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE is in position at zone 325.
(8) Make sure that the access panels 325BR 325BL are open (Ref. AMM TASK 55-33-13-010-002).
(9) Make sure that the PIN - RIGGING (5) 98D27207549000 PIN-RIGGING is in the bellcrank of the yaw damper
(10) Make sure that the PIN - RIGGING (4) 98D27207548000 PIN-RIGGING is in the mixer of the artificial feel unit.
Subtask 27-26-17-865-052-A (1) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(2) Make sure that the WARNING NOTICE(S) are in position.
(3) Make sure that the rudder pedals are in the neutral position.
(4) Make sure that the RUD TRIM indicator on the panel 110VU of the center pedestal shows zero.
(5) Make sure that the FLT CTL/FAC 1 pushbutton switch on the overhead panel 23VU is released and the OFF legend is on.
(6) Make sure that the FLT CTL/FAC 2 pushbutton switch on the overhead panel 24VU is released and the OFF legend is on.
(7) Make sure that the ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE is in position at zone 325.
(8) Make sure that the access panels 325BR 325BL are open (Ref. AMM TASK 55-33-13-010-002).
(9) Make sure that the PIN - RIGGING (5) 98D27207549000 PIN-RIGGING is in the bellcrank of the yaw damper
(10) Make sure that the PIN - RIGGING (4) 98D27207548000 PIN-RIGGING is in the mixer of the artificial feel unit.
B. 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 | AUTO FLT/FAC1/28VDC | 5CC1 | B04 |
| 49VU | AUTO FLT/FAC1/26VAC | 14CC1 | B03 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AUTO FLT/FAC1/28VDC | 5CC1 | H10 |
| 49VU | AUTO FLT/FAC1/26VAC | 14CC1 | H09 |
| ** ON A/C ALL | |||
| 121VU | AUTO FLT/FAC2/28VDC | 5CC2 | M19 |
| 121VU | AUTO FLT/FAC2/26VAC | 14CC2 | M18 |
Subtask 27-26-17-910-050-A
A. Preparation for the Installation
(1) Make sure that the paintwork and the structure of the vertical stabilizer (1) and the rudder (2) are in the correct condition.
(2) Clean the interface of the support bracket (8) with Non Aqueous Cleaner-General - - (Material No.08BAA9) and let it dry.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Make sure that the bonding jumpers (17) are in the correct condition.
(5) Make sure that all the electrical connections are clean and in the correct condition.
(6) Apply Synthetic Oil base Grease-General Purpose Lithium Thickened - (Material No.03GBD1) or Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the bush (21) and the threads of the bolts (6),(7) and (22).
(7) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the shafts of the bolts (6),(7) and (22).
(8) Apply a thin layer of Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the interface of the support bracket (8) and the the replacement transducer unit (3) (Ref. AMM TASK 51-75-13-916-002).
Subtask 27-26-17-420-050-A (1) Make sure that the paintwork and the structure of the vertical stabilizer (1) and the rudder (2) are in the correct condition.
(2) Clean the interface of the support bracket (8) with Non Aqueous Cleaner-General - - (Material No.08BAA9) and let it dry.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Make sure that the bonding jumpers (17) are in the correct condition.
(5) Make sure that all the electrical connections are clean and in the correct condition.
(6) Apply Synthetic Oil base Grease-General Purpose Lithium Thickened - (Material No.03GBD1) or Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the bush (21) and the threads of the bolts (6),(7) and (22).
(7) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the shafts of the bolts (6),(7) and (22).
(8) Apply a thin layer of Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the interface of the support bracket (8) and the the replacement transducer unit (3) (Ref. AMM TASK 51-75-13-916-002).
B. Installation of the Yaw Damper Position Transducer Unit 2CC
(1) Install the transducer unit (3) at the support bracket (8) as follows:
(a) Put the flange (20) in position at the support bracket (8) and attach it with the bolts (6) and (7), the washers (16) and the nuts (15).
(b) Tighten the nuts (15) and safety them with the new AIPC 27-26-04-01-050 COTTER PINS (14) or AIPC 27-26-84-01-010 COTTER PINS (14).
(2) Connect the push-rod (13) to the transducer unit (3) as follows:
(a) Install the bush (21) in the transducer lever (12).
(b) Put the push-rod (13) in position in the transducer lever (12) and attach it wit the bolt (22), the washer (11) and the nut (10).
(c) Tighten the nut (10) and safety it with a new AIPC 27-26-04-01-050 COTTER PIN (9) or AIPC 27-26-84-01-010 COTTER PIN (9).
(3) Remove the CAP-BLANKING from each electrical connector and receptacle.
(4) Make sure that all the electrical connections are clean and in the correct condition.
(5) Connect the electrical connectors (18) to the plugs (19).
Subtask 27-26-17-820-050-A (1) Install the transducer unit (3) at the support bracket (8) as follows:
(a) Put the flange (20) in position at the support bracket (8) and attach it with the bolts (6) and (7), the washers (16) and the nuts (15).
(b) Tighten the nuts (15) and safety them with the new AIPC 27-26-04-01-050 COTTER PINS (14) or AIPC 27-26-84-01-010 COTTER PINS (14).
(2) Connect the push-rod (13) to the transducer unit (3) as follows:
(a) Install the bush (21) in the transducer lever (12).
(b) Put the push-rod (13) in position in the transducer lever (12) and attach it wit the bolt (22), the washer (11) and the nut (10).
(c) Tighten the nut (10) and safety it with a new AIPC 27-26-04-01-050 COTTER PIN (9) or AIPC 27-26-84-01-010 COTTER PIN (9).
(3) Remove the CAP-BLANKING from each electrical connector and receptacle.
(4) Make sure that all the electrical connections are clean and in the correct condition.
(5) Connect the electrical connectors (18) to the plugs (19).
NOTE: Make sure that the cables of the electrical connectors (18) do not rub on the spar box of the vertical stabilizer (1).
C. Adjustment Procedure
(1) Make sure that the rigging pin (23) of the transducer (3) can be installed and removed easily.
(a) Cut and remove the lockwire from the nuts (24).
(b) Loosen the nuts (24).
(c) Turn the rod body as required until you can install and remove the rigging pin (23) easily.
(d) Tighten the nuts (24) and safety them with lockwire corrosion-resistant steel 0.8 mm (0.032 in.).
(e) Make sure that the rigging pin (23) can be installed and removed easily.
(f) Make sure that the rigging pin (23) is clear of the housing.
Subtask 27-26-17-080-050-A (1) Make sure that the rigging pin (23) of the transducer (3) can be installed and removed easily.
NOTE: The rigging pin (23) is part of the transducer.
(2) If you can not install the rigging pin (23) easily, adjust the length of the push rod (13) as follows: (a) Cut and remove the lockwire from the nuts (24).
(b) Loosen the nuts (24).
(c) Turn the rod body as required until you can install and remove the rigging pin (23) easily.
(d) Tighten the nuts (24) and safety them with lockwire corrosion-resistant steel 0.8 mm (0.032 in.).
(e) Make sure that the rigging pin (23) can be installed and removed easily.
(f) Make sure that the rigging pin (23) is clear of the housing.
D. Removal of the Rigging Pins
(1) Remove the rigging pin (4) 98D27207548000 PIN-RIGGING from the mixer of the artificial feel unit.
(2) Remove the rigging pin (5) 98D27207549000 PIN-RIGGING from the bellcrank of the yaw damper.
Subtask 27-26-17-865-051-A (1) Remove the rigging pin (4) 98D27207548000 PIN-RIGGING from the mixer of the artificial feel unit.
(2) Remove the rigging pin (5) 98D27207549000 PIN-RIGGING from the bellcrank of the yaw damper.
E. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 27-26-17-710-050-A 5. Close-up| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AUTO FLT/FAC1/28VDC | 5CC1 | B04 |
| 49VU | AUTO FLT/FAC1/26VAC | 14CC1 | B03 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AUTO FLT/FAC1/28VDC | 5CC1 | H10 |
| 49VU | AUTO FLT/FAC1/26VAC | 14CC1 | H09 |
| ** ON A/C ALL | |||
| 121VU | AUTO FLT/FAC2/28VDC | 5CC2 | M19 |
| 121VU | AUTO FLT/FAC2/26VAC | 14CC2 | M18 |
Subtask 27-26-17-410-050-B
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access panels 325BL 325BR at the trailing edge of the vertical stabilizer (Ref. AMM TASK 55-33-13-410-002).
(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 panels 325BL 325BR at the trailing edge of the vertical stabilizer (Ref. AMM TASK 55-33-13-410-002).
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).