DOC AIRBUS | AMM A320FInstallation of the Restraint System
TASK 25-22-42-400-003-A
Installation of the Restraint System
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. Referenced Information
3. Job Set-up
Subtask 25-22-42-860-052-A ** ON A/C NOT FOR ALL
Subtask 25-22-42-210-054-A ** ON A/C NOT FOR ALL
Subtask 25-22-42-410-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.03.31 23:30:51 UTC
Installation of the Restraint System
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
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 200 | UPPER HALF FUSELAGE |
| 260 | AFT CABIN UTILITY AREA |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
| TASK 24-42-00-862-001-A | De-energize the Ground Service Network Supplied from the External Power |
Restraint SystemSubtask 25-22-42-860-052-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
4. Procedure(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
Subtask 25-22-42-210-054-A ** ON A/C NOT FOR ALL
A. Preparation for Installation
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Do an inspection of the component interfaces and the adjacent area.
Subtask 25-22-42-420-055-A ** ON A/C NOT FOR ALL (1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Do an inspection of the component interfaces and the adjacent area.
B. Installation of the Restraint System
(1) Install the shoulder harness (7):
(a) Put the inertia reels (8) in position and install the screws (9).
(b) TORQUE the screws (9) to between 100 and 60 lbf.in (1.13 and 0.68 m.daN )
.
(c) Pull the shoulder harness (7) up and put it in position on the seat structure.
(e) Put the strap guide (6) in position and install the screws (5).
(f) Push the headrest (1) down until you hear a click.
(g) Install the backrest cushions (2) and (3).
(a) Put the spacer (12) and the belt assembly (10) in position.
(b) Make sure that the belt assembly (10) is not twisted.
(c) Make sure that the labels on the belt assembly (10) (that give the part number information) point to the backrest of the seat.
(d) Install the bolts (11).
(e) TORQUE the bolts (11) to between 158 and 105 lbf.in (1.79 and 1.19 m.daN ).
(3) Remove the weight from the seat pan (4) and put it in the closed position.
Subtask 25-22-42-420-055-B ** ON A/C NOT FOR ALL (1) Install the shoulder harness (7):
(a) Put the inertia reels (8) in position and install the screws (9).
(b) TORQUE the screws (9) to between 100 and 60 lbf.in (1.13 and 0.68 m.daN )
. (c) Pull the shoulder harness (7) up and put it in position on the seat structure.
NOTE: You can use a cord to pull the shoulder harness (7) up.
(d) Make sure that the shoulder harness (7) is not twisted.(e) Put the strap guide (6) in position and install the screws (5).
(f) Push the headrest (1) down until you hear a click.
(g) Install the backrest cushions (2) and (3).
NOTE: The backrest cushions (2) and (3) are attached to the seat structure with burr strips.
(2) Install the belt assembly (10): (a) Put the spacer (12) and the belt assembly (10) in position.
(b) Make sure that the belt assembly (10) is not twisted.
(c) Make sure that the labels on the belt assembly (10) (that give the part number information) point to the backrest of the seat.
(d) Install the bolts (11).
(e) TORQUE the bolts (11) to between 158 and 105 lbf.in (1.79 and 1.19 m.daN )
. (3) Remove the weight from the seat pan (4) and put it in the closed position.
B. Installation of the Restraint System
(1) Install the restraint system assembly (8), the washers (10) and the bolts (9).
(2) TORQUE the bolts (9) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ).
(3) Install the inertia reel(s) (7), the washers (6) and the screws (5).
(4) TORQUE the screws (5) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ).
(5) Install the cover (3) and the screws (4).
(6) Install the backrest cushions (1).
Subtask 25-22-42-710-052-A ** ON A/C NOT FOR ALL (1) Install the restraint system assembly (8), the washers (10) and the bolts (9).
(2) TORQUE the bolts (9) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
. (3) Install the inertia reel(s) (7), the washers (6) and the screws (5).
(4) TORQUE the screws (5) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
. (5) Install the cover (3) and the screws (4).
(6) Install the backrest cushions (1).
NOTE: The burrstrips attach the cushions to the seat structure.
(7) Remove the weight from the seatpan (2) and put it in the close position. C. Do the Test of the Restraint System.
(1) Make sure that the buckle locks/unlocks correctly.
(2) Make sure that you can adjust the length of the belt assy correctly.
(3) Make sure that you can pull out the shoulder harness smoothly and that it goes back into its inertia reel automatically.
(4) Make sure that the shoulder harness locks when you pull hard and that it unlocks when you release the tension.
5. Close-up(1) Make sure that the buckle locks/unlocks correctly.
(2) Make sure that you can adjust the length of the belt assy correctly.
(3) Make sure that you can pull out the shoulder harness smoothly and that it goes back into its inertia reel automatically.
(4) Make sure that the shoulder harness locks when you pull hard and that it unlocks when you release the tension.
Subtask 25-22-42-410-053-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
Subtask 25-22-42-862-052-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.