DOC AIRBUS | AMM A320FInstallation of the Diagonal Support Struts at FR77
TASK 53-53-11-400-002-A
Installation of the Diagonal Support Struts at FR77
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 53-53-11-860-051-A
Subtask 53-53-11-916-050-A
Subtask 53-53-11-865-055-A
[Rev.10 from 2021]
2026.04.01 12:49:06 UTC
Installation of the Diagonal Support Struts at FR77
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.
NOTE: The installation for one support strut is given. The procedure is the same for the other support struts.
1. Reason for the JobSelf Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.03HBD9) | Synthetic Ester base Grease-General Purpose Low Temp - |
| (Material No.12ACC1) | Corrosion Preventive Compound-Heavy Duty Soft Film - |
| (Material No.14QFB1) | Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 312AR, 314AR |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 4 | COTTER PINS | AIPC 53-53-04-02-060 |
| 4 | COTTER PINS | AIPC 53-53-84-02-060 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| 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 51-75-13-916-002-A | Repair to a layer of Corrosion Preventive Compound |
| TASK 52-41-23-010-801-A | Opening of Access Door 314AR |
| TASK 52-41-23-410-801-A | Closing of Access Door 314AR |
| TASK 53-55-13-400-001-A | Installation of the Fairings at the THS Fittings. |
| TASK 55-15-11-400-001-A | Installation of the Apron 333AT/333AB/343AT/343AB |
Diagonal Support StrutsSubtask 53-53-11-860-051-A
A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft is in the same configuration as for the removal task.
(2) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to move the flight controls.
(3) Make sure that the access platforms are in position.
(4) Make sure that access door 312AR is open.
(5) Make sure that access door 314AR is open (Ref. AMM TASK 52-41-23-010-801).
Subtask 53-53-11-864-051-A (1) Make sure that the aircraft is in the same configuration as for the removal task.
(2) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to move the flight controls.
(3) Make sure that the access platforms are in position.
(4) Make sure that access door 312AR is open.
(5) Make sure that access door 314AR is open (Ref. AMM TASK 52-41-23-010-801).
B. 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), (Ref. AMM TASK 29-10-00-864-003).
Subtask 53-53-11-865-054-A C. 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 | 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 |
Subtask 53-53-11-916-050-A
A. Preparation for Installation
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Apply Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the bolts (1).
Subtask 53-53-11-420-053-A (1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Apply Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the bolts (1).
B. Installation of the Diagonal Support Struts at FR77
(1) Put the support strut (5) in position and install the bolts (1).
(2) Install the washers (2) and the nuts (3). Do not tighten the nuts (3) at this time.
(3) Make sure that the clearance 'X' is 14.5 +2.5 mm or -2.5 mm (0.5709 +0.0984 in. or -0.0984 in.) between the THS attach support and the inner attach fitting.
(4) Do a check of the clearance 'Y' at the left and the right attach fittings:
(a) The value of the clearance 'Y' must be equal at the left and the right fittings. A tolerance of +/- 0.2 mm (0.0079 in.) is permitted.
(5) Make sure that the dimension 'Z' between the bolt and the sleeve is a minimum of 0.5 mm (0.0197 in.).
(6) If the clearances 'X', 'Y' and 'Z' are correct, do the steps that follow:
(a) TORQUE the tubes of the support struts (5) in the correct direction as follows:
.
(c) Safety the locknuts (11) with the lockwire14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(d) TORQUE the nuts (3) to between 1.35 and 1.20 m.daN (119.47 and 106.19 lbf.in ).
(e) Safety the nuts (3) with the new AIPC 53-53-04-02-060 COTTER PINS (4) or AIPC 53-53-84-02-060 COTTER PINS (4).
(f) Install the bonding straps (8) and (10) with the screws (6), washers (7) and nuts (9) (Ref. AMM TASK 20-28-00-912-802).
(g) Apply the Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) to the area (Ref. AMM TASK 51-75-13-916-002).
(7) If one or more of the clearances 'X', 'Y' and 'Z' is(are) not correct, do the adjustment of the THS (Refer to Para. 4.C.).
Subtask 53-53-11-820-051-A (1) Put the support strut (5) in position and install the bolts (1).
(2) Install the washers (2) and the nuts (3). Do not tighten the nuts (3) at this time.
(3) Make sure that the clearance 'X' is 14.5 +2.5 mm or -2.5 mm (0.5709 +0.0984 in. or -0.0984 in.) between the THS attach support and the inner attach fitting.
(4) Do a check of the clearance 'Y' at the left and the right attach fittings:
(a) The value of the clearance 'Y' must be equal at the left and the right fittings. A tolerance of +/- 0.2 mm (0.0079 in.) is permitted.
(5) Make sure that the dimension 'Z' between the bolt and the sleeve is a minimum of 0.5 mm (0.0197 in.).
(6) If the clearances 'X', 'Y' and 'Z' are correct, do the steps that follow:
(a) TORQUE the tubes of the support struts (5) in the correct direction as follows:
- The top tubes to between 3.59 and 3.25 m.daN (26.47 and 23.97 lbf.ft )
- The bottom tubes to between 3.08 and 2.78 m.daN (22.71 and 20.50 lbf.ft ) .
. (c) Safety the locknuts (11) with the lockwire
(d) TORQUE the nuts (3) to between 1.35 and 1.20 m.daN (119.47 and 106.19 lbf.in )
. (e) Safety the nuts (3) with the new AIPC 53-53-04-02-060 COTTER PINS (4) or AIPC 53-53-84-02-060 COTTER PINS (4).
(f) Install the bonding straps (8) and (10) with the screws (6), washers (7) and nuts (9) (Ref. AMM TASK 20-28-00-912-802).
(g) Apply the Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) to the area (Ref. AMM TASK 51-75-13-916-002).
(7) If one or more of the clearances 'X', 'Y' and 'Z' is(are) not correct, do the adjustment of the THS (Refer to Para. 4.C.).
C. Adjustment of the THS
(1) Remove and discard the lockwire.
(2) Loosen the locknuts (11).
(3) Remove the two support struts at the side where the clearance 'Y' has the highest value.
(4) Adjust the two remaining support struts until the value of the clearance 'Y' is equal at the left and the right fittings. A tolerance of +/- 0.2 mm (0.0079 in.) is permitted.
(5) Make sure that the clearance 'X' is 14.5 +2.5 mm or -2.5 mm (0.5709 +0.0984 in. or -0.0984 in.) between the THS attach support and the inner fitting.
(6) Make sure that the dimension 'Z' between the bolt and the sleeve is a minimum of 0.5 mm (0.0197 in.).
(7) Install the support struts (Refer to Para. 4.D.).
Subtask 53-53-11-420-054-A (1) Remove and discard the lockwire.
(2) Loosen the locknuts (11).
(3) Remove the two support struts at the side where the clearance 'Y' has the highest value.
(4) Adjust the two remaining support struts until the value of the clearance 'Y' is equal at the left and the right fittings. A tolerance of +/- 0.2 mm (0.0079 in.) is permitted.
(5) Make sure that the clearance 'X' is 14.5 +2.5 mm or -2.5 mm (0.5709 +0.0984 in. or -0.0984 in.) between the THS attach support and the inner fitting.
(6) Make sure that the dimension 'Z' between the bolt and the sleeve is a minimum of 0.5 mm (0.0197 in.).
(7) Install the support struts (Refer to Para. 4.D.).
D. Installation after Adjustment of the THS
(1) TORQUE the tubes of the support struts (5) in the correct direction, as follows:
.
(3) Safety the locknuts (11) with the lockwire14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(4) TORQUE the nuts (3) to between 1.35 and 1.20 m.daN (119.47 and 106.19 lbf.in ).
(5) Safety the nuts (3) with the new AIPC 53-53-04-02-060 COTTER PINS (4) or AIPC 53-53-84-02-060 COTTER PINS (4).
(6) Install the bonding straps (8) and (10) with the screws (6), washers (7) and nuts (9) (Ref. AMM TASK 20-28-00-912-802).
(7) Apply the Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) to the area (Ref. AMM TASK 51-75-13-916-002).
5. Close-up(1) TORQUE the tubes of the support struts (5) in the correct direction, as follows:
- The top tubes to between 3.59 and 3.25 m.daN (26.47 and 23.97 lbf.ft ) .
- The bottom tubes to between 3.08 and 2.78 m.daN (22.71 and 20.50 lbf.ft ) .
. (3) Safety the locknuts (11) with the lockwire
(4) TORQUE the nuts (3) to between 1.35 and 1.20 m.daN (119.47 and 106.19 lbf.in )
. (5) Safety the nuts (3) with the new AIPC 53-53-04-02-060 COTTER PINS (4) or AIPC 53-53-84-02-060 COTTER PINS (4).
(6) Install the bonding straps (8) and (10) with the screws (6), washers (7) and nuts (9) (Ref. AMM TASK 20-28-00-912-802).
(7) Apply the Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) to the area (Ref. AMM TASK 51-75-13-916-002).
Subtask 53-53-11-865-055-A
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 53-53-11-410-051-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 |
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the THS fairings (Ref. AMM TASK 53-55-13-400-001).
(3) Install the THS aprons (Ref. AMM TASK 55-15-11-400-001).
(4) Close access door 314AR (Ref. AMM TASK 52-41-23-410-801).
(5) Close access door 312AR.
(6) Remove the WARNING NOTICE(S).
(7) Remove the access platform(s).
(8) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the THS fairings (Ref. AMM TASK 53-55-13-400-001).
(3) Install the THS aprons (Ref. AMM TASK 55-15-11-400-001).
(4) Close access door 314AR (Ref. AMM TASK 52-41-23-410-801).
(5) Close access door 312AR.
(6) Remove the WARNING NOTICE(S).
(7) Remove the access platform(s).
(8) Remove the ground support and maintenance equipment, the special and standard tools and all other items.