DOC AIRBUS | AMM A320FAdjustment of the Servo Mechanism
TASK 25-52-00-820-001-A
Adjustment of the Servo Mechanism
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 25-52-00-010-050-A ** ON A/C NOT FOR ALL
Subtask 25-52-00-820-050-A ** ON A/C NOT FOR ALL
Subtask 25-52-00-865-100-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.03.31 23:37:48 UTC
Adjustment of the Servo Mechanism
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) |
| No specific | 1 | PIN DIA 4 MM (0.157 IN) - RIGGING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | 1 | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 130 | FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX |
| 150 | AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT |
| 134AR, 154AR |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 12 | COTTER PIN | AIPC 25-52-02-11-140 |
| 12 | COTTER PIN | AIPC 25-52-02-11-190 |
| 12 | COTTER PIN | AIPC 25-52-02-11-240 |
| 12 | COTTER PIN | AIPC 25-52-02-13-150 |
| 12 | COTTER PIN | AIPC 25-52-82-11-040 |
| 12 | COTTER PIN | AIPC 25-52-82-11-090 |
| 12 | COTTER PIN | AIPC 25-52-82-11-170 |
| 12 | COTTER PIN | AIPC 25-52-82-13-050 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 25-52-00-710-004-A | Operational Test of the Door Sill Latches in the Forward Cargo Compartment and in the Aft Cargo Compartment |
| TASK 25-52-22-000-001-A | Removal of the Ball Mats and the Ball Strips |
| TASK 25-52-22-400-001-A | Installation of the Ball Mats and the Ball Strips |
| TASK 25-52-51-000-001-A | Removal of the Servo Mechanism and Actuator |
| TASK 25-52-51-400-001-A | Installation of the Servo Mechanism and Actuator |
| TASK 52-30-00-080-001-A | Removal of the Safety Support Equipment |
| TASK 52-30-00-480-001-A | Installation of the Safety Support Equipment |
| TASK 52-30-00-860-001-A | Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| TASK 52-30-00-860-002-A | Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
Servo Mechanism and DrawbarsSubtask 25-52-00-010-050-A ** ON A/C NOT FOR ALL
A. Get Access
(1) Open the forward and/or aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at the opening of the forward and/or aft cargo-compartment door(s).
(3) Put the WARNING NOTICE(S) on the control panel of the related cargo loading system to tell persons not to use it.
Subtask 25-52-00-865-098-A ** ON A/C NOT FOR ALL (1) Open the forward and/or aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at the opening of the forward and/or aft cargo-compartment door(s).
(3) Put the WARNING NOTICE(S) on the control panel of the related cargo loading system to tell persons not to use it.
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 25-52-00-010-051-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 2000VU | SEMI AUTO CLS-FWD | 3MY | E08 |
| 2000VU | SEMI AUTO CLS-FWD | 2MY | E06 |
| 2001VU | SEMI AUTO CLS-AFT | 103MY | D08 |
| 2001VU | SEMI AUTO CLS-AFT | 102MY | D06 |
C. Get Access
(1) Remove the ball strips and the ball mat to get access to the servo mechanism and actuator (Ref. AMM TASK 25-52-22-000-001).
(2) Remove the protective cover of the manual mechanism (Ref. AMM TASK 25-52-51-000-001).
4. Procedure(1) Remove the ball strips and the ball mat to get access to the servo mechanism and actuator (Ref. AMM TASK 25-52-22-000-001).
(2) Remove the protective cover of the manual mechanism (Ref. AMM TASK 25-52-51-000-001).
Subtask 25-52-00-820-050-A ** ON A/C NOT FOR ALL
A. Adjustment of the Drawbars
(2) Turn the actuation lever (10), this causes the adjustment pin (9) to engage with the shaft (11). At the same time the manual lever (2) of the door sill latches moves to the "A" position.
(3) Put a PIN DIA 4 MM (0.157 IN) - RIGGING into the rigging hole (6) of each door sill latch.
(4) Make sure the actuator (7) is in its extended position.
(5) Remove and discard the cotter pins (12) from the drawbar(s) which you adjust.
(6) Put the drawbar(s) and/or drawbar assembly in position and if necessary:
Subtask 25-52-00-010-052-A ** ON A/C NOT FOR ALL NOTE: Always adjust the drawbar(s) after the installation of:
(1) Adjust the drawbar(s) as necessary. Turn the forkend to adjust the drawbar. - The door sill latch(es)
- The servo mechanism and/or actuator
- The drawbar(s).
(2) Turn the actuation lever (10), this causes the adjustment pin (9) to engage with the shaft (11). At the same time the manual lever (2) of the door sill latches moves to the "A" position.
(3) Put a PIN DIA 4 MM (0.157 IN) - RIGGING into the rigging hole (6) of each door sill latch.
(4) Make sure the actuator (7) is in its extended position.
(5) Remove and discard the cotter pins (12) from the drawbar(s) which you adjust.
(6) Put the drawbar(s) and/or drawbar assembly in position and if necessary:
- Adjust the drawbar (1) and safety it with the new AIPC 25-52-02-11-140 COTTER PIN (12) or AIPC 25-52-82-11-170 COTTER PIN (12).
- Adjust the drawbar (3) and safety it with the new AIPC 25-52-02-11-190 COTTER PIN (12) or AIPC 25-52-82-11-090 COTTER PIN (12).
- Adjust the drawbar (4) so that the limit switch (5) operates between 2 mm (0.0787 in.) and 5 mm (0.1969 in.).
- Safety the drawbar (4) with the new AIPC 25-52-02-11-240 COTTER PIN (12) or AIPC 25-52-82-11-040 COTTER PIN (12).
- Adjust the drawbar assembly (8) so that there is no play and safety it with a new AIPC 25-52-02-13-150 COTTER PIN (12) or AIPC 25-52-82-13-050 COTTER PIN (12).
B. Get access to the Control Panel
(1) Open the access panels 134AR and 154AR to get access to the control panel for the selector of the cargo-compartment door.
Subtask 25-52-00-860-051-A ** ON A/C NOT FOR ALL (1) Open the access panels 134AR and 154AR to get access to the control panel for the selector of the cargo-compartment door.
C. Preparation for the Test
(1) Remove the pin 4 mm (0.1575 in.) out of the rigging hole of each door sill latch.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the actuator safety locks from the forward and/or aft cargo-compartment door (Ref. AMM TASK 52-30-00-080-001).
(4) Remove the WARNING NOTICE(S).
Subtask 25-52-00-865-099-A ** ON A/C NOT FOR ALL (1) Remove the pin 4 mm (0.1575 in.) out of the rigging hole of each door sill latch.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the actuator safety locks from the forward and/or aft cargo-compartment door (Ref. AMM TASK 52-30-00-080-001).
(4) Remove the WARNING NOTICE(S).
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 25-52-00-710-050-A ** ON A/C NOT FOR ALL 5. Close-up| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 2000VU | SEMI AUTO CLS-FWD | 3MY | E08 |
| 2000VU | SEMI AUTO CLS-FWD | 2MY | E06 |
| 2001VU | SEMI AUTO CLS-AFT | 103MY | D08 |
| 2001VU | SEMI AUTO CLS-AFT | 102MY | D06 |
Subtask 25-52-00-865-100-A ** ON A/C NOT FOR ALL
A. Open, safety and tag this(these) circuit breaker(s):
Subtask 25-52-00-860-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 2000VU | SEMI AUTO CLS-FWD | 3MY | E08 |
| 2000VU | SEMI AUTO CLS-FWD | 2MY | E06 |
| 2001VU | SEMI AUTO CLS-AFT | 103MY | D08 |
| 2001VU | SEMI AUTO CLS-AFT | 102MY | D06 |
B. Put the aircraft back to the serviceable condition.
(1) Install the actuator safety locks on the forward and/or aft cargo compartment door (Ref. AMM TASK 52-30-00-480-001).
(2) Put the WARNING NOTICE(S) on the control panel of the cargo loading system to tell persons not to use it.
(3) Install the ball mats and ball strips (Ref. AMM TASK 25-52-22-400-001).
(4) Install the protective cover of the manual mechanism (Ref. AMM TASK 25-52-51-400-001) .
Subtask 25-52-00-865-101-A ** ON A/C NOT FOR ALL (1) Install the actuator safety locks on the forward and/or aft cargo compartment door (Ref. AMM TASK 52-30-00-480-001).
(2) Put the WARNING NOTICE(S) on the control panel of the cargo loading system to tell persons not to use it.
(3) Install the ball mats and ball strips (Ref. AMM TASK 25-52-22-400-001).
(4) Install the protective cover of the manual mechanism (Ref. AMM TASK 25-52-51-400-001) .
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 25-52-00-410-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 2000VU | SEMI AUTO CLS-FWD | 3MY | E08 |
| 2000VU | SEMI AUTO CLS-FWD | 2MY | E06 |
| 2001VU | SEMI AUTO CLS-AFT | 103MY | D08 |
| 2001VU | SEMI AUTO CLS-AFT | 102MY | D06 |
D. Close Access
(1) Remove the WARNING NOTICE(S).
(2) Close the forward and/or aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
(3) Close the access panels 134AR and 154AR.
(4) Remove the access platform(s).
(1) Remove the WARNING NOTICE(S).
(2) Close the forward and/or aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
(3) Close the access panels 134AR and 154AR.
(4) Remove the access platform(s).