DOC AIRBUS | AMM A320FOperational Test of the Cockpit-Seats Safety Harness Assembly
TASK 25-11-00-200-002-A
Operational Test of the Cockpit-Seats Safety Harness Assembly
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels
B. Referenced Information
3. Job Set-up
Subtask 25-11-00-860-053-A 4. Procedure
Subtask 25-11-00-210-051-A
Subtask 25-11-00-860-052-A
[Rev.10 from 2021]
2026.04.01 06:01:47 UTC
Operational Test of the Cockpit-Seats Safety Harness Assembly
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 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 |
Cockpit-Seats Safety Harness AssemblySubtask 25-11-00-860-053-A 4. Procedure
Subtask 25-11-00-210-051-A
A. Operational Check of the Cockpit-Seats Safety Harness Assembly
Do the operational check of the shoulder harness (2) of the CAPT, the F/O and the third occupant seats as follows:
(a) FOR [14MM] (SEAT-THIRD OCCUPANT)
Pull the headrest (4) up and the seat pan (5) down.
(b) Connect all the connectors from belt to the buckle assembly (6).
(c) Turn the buckle control (6) clockwise to release the connectors of shoulder harnesses (2) and belt (3) from the buckle assembly (6).
Make sure that only one connector stays engaged and all the others are released. The buckle control moves back to the CLOSED position.
(d) Do step (b) again. Then, turn the buckle control counterclockwise to release the connectors from the buckle assembly (6).
Make sure that only one connector stays engaged and all the others are released. The buckle control (6) moves back to the CLOSED position.
(e) Make sure that the related safety-harness locking lever (1) is in the UNLOCK position.
(f) Gradually pull the shoulder harness (2).
(g) Make sure that shoulder harness (2) does not become locked until it is fully extended.
The shoulder straps extend, make sure that the shoulder straps do not have too much web fray or cuts.
(h) Release the shoulder harness (2).
(i) Pull the shoulder harness (2) with a sudden movement at different positions along its full length.
(j) Make sure that the automatic inertial-reels stop the movement of the shoulder harness (2).
(k) Release the shoulder harness (2).
(l) Push the related safety-harness locking lever (1) to the LOCK position.
(m) Pull the related shoulder harness (2).
(n) Make sure that the related shoulder harness (2) is locked.
(o) Pull the related safety-harness locking lever (1) to the UNLOCK position.
(2) FOR [13MM] (SEAT-FOURTH OCCUPANT)
Do the operational check of the shoulder harness (2) of the fourth occupant seat as follows:
(a) Pull the seat pan (5) down.
(b) Connect all the connectors from belt to the buckle assembly (6).
(c) Turn the buckle control (6) clockwise to release the connectors of shoulder harnesses (2) and belt (3) from the buckle assembly (6).
Make sure that only one connector stays engaged and all the others are released. The buckle control moves back to the CLOSED position.
(d) Do step (b) again. Then, turn the buckle control counterclockwise to release the connectors from the buckle assembly (6).
Make sure that only one connector stays engaged and all the others are released. The buckle control (6) moves back to the CLOSED position.
(e) Gradually pull the shoulder harness (2).
(f) Make sure that the shoulder harness (2) does not become locked until it is fully extended.
The shoulder straps extend, make sure that the shoulder straps do not have too much web fray or cuts.
(g) Release the shoulder harness (2).
(h) Pull the shoulder harness (2) with a sudden movement at different positions along its full length.
(i) Make sure that the automatic inertial-reels stop the movement of the shoulder harness (2).
(j) Release the shoulder harness (2).
(3) FOR [3MS] (SEAT-CAPTAIN), [4MS] (SEAT-F/O)
Make sure that the lap buckle is installed on the outboard side of the seat to prevent damage to the center pedestal.
Subtask 25-11-00-210-052-A NOTE: The cockpit-seats shoulder harness is referred to in this procedure as the shoulder harness.
(1) FOR [3MS] (SEAT-CAPTAIN), [4MS] (SEAT-F/O), [14MM] (SEAT-THIRD OCCUPANT)Do the operational check of the shoulder harness (2) of the CAPT, the F/O and the third occupant seats as follows:
(a) FOR [14MM] (SEAT-THIRD OCCUPANT)
Pull the headrest (4) up and the seat pan (5) down.
(b) Connect all the connectors from belt to the buckle assembly (6).
(c) Turn the buckle control (6) clockwise to release the connectors of shoulder harnesses (2) and belt (3) from the buckle assembly (6).
Make sure that only one connector stays engaged and all the others are released. The buckle control moves back to the CLOSED position.
(d) Do step (b) again. Then, turn the buckle control counterclockwise to release the connectors from the buckle assembly (6).
Make sure that only one connector stays engaged and all the others are released. The buckle control (6) moves back to the CLOSED position.
(e) Make sure that the related safety-harness locking lever (1) is in the UNLOCK position.
(f) Gradually pull the shoulder harness (2).
(g) Make sure that shoulder harness (2) does not become locked until it is fully extended.
The shoulder straps extend, make sure that the shoulder straps do not have too much web fray or cuts.
(h) Release the shoulder harness (2).
(i) Pull the shoulder harness (2) with a sudden movement at different positions along its full length.
(j) Make sure that the automatic inertial-reels stop the movement of the shoulder harness (2).
(k) Release the shoulder harness (2).
(l) Push the related safety-harness locking lever (1) to the LOCK position.
(m) Pull the related shoulder harness (2).
(n) Make sure that the related shoulder harness (2) is locked.
(o) Pull the related safety-harness locking lever (1) to the UNLOCK position.
(2) FOR [13MM] (SEAT-FOURTH OCCUPANT)
Do the operational check of the shoulder harness (2) of the fourth occupant seat as follows:
(a) Pull the seat pan (5) down.
(b) Connect all the connectors from belt to the buckle assembly (6).
(c) Turn the buckle control (6) clockwise to release the connectors of shoulder harnesses (2) and belt (3) from the buckle assembly (6).
Make sure that only one connector stays engaged and all the others are released. The buckle control moves back to the CLOSED position.
(d) Do step (b) again. Then, turn the buckle control counterclockwise to release the connectors from the buckle assembly (6).
Make sure that only one connector stays engaged and all the others are released. The buckle control (6) moves back to the CLOSED position.
(e) Gradually pull the shoulder harness (2).
(f) Make sure that the shoulder harness (2) does not become locked until it is fully extended.
The shoulder straps extend, make sure that the shoulder straps do not have too much web fray or cuts.
(g) Release the shoulder harness (2).
(h) Pull the shoulder harness (2) with a sudden movement at different positions along its full length.
(i) Make sure that the automatic inertial-reels stop the movement of the shoulder harness (2).
(j) Release the shoulder harness (2).
(3) FOR [3MS] (SEAT-CAPTAIN), [4MS] (SEAT-F/O)
Make sure that the lap buckle is installed on the outboard side of the seat to prevent damage to the center pedestal.
B. Replacement Guidelines: Replace the belt if you find one of these conditions:
(1) Belts not the same color.
(2) Cuts or tears at the edge of the web.
(3) Fraying across more than 10% of the width of the webbing. Fraying is a type of wear which occurs when rubbing (abrasion) breaks the web fibers and causes the thickness of the web to increase.
(4) More than 15 broken yarns in locations other than the edge.
(5) Web frayed or distorted sufficiently to cause improper operation of any portion of the restraint system.
(6) More than 10 stitches in a stitch pattern. The stitch patterns are located at the belt ends near the buckles where there are two thicknesses of web.
5. Close-up(1) Belts not the same color.
(2) Cuts or tears at the edge of the web.
(3) Fraying across more than 10% of the width of the webbing. Fraying is a type of wear which occurs when rubbing (abrasion) breaks the web fibers and causes the thickness of the web to increase.
(4) More than 15 broken yarns in locations other than the edge.
(5) Web frayed or distorted sufficiently to cause improper operation of any portion of the restraint system.
(6) More than 10 stitches in a stitch pattern. The stitch patterns are located at the belt ends near the buckles where there are two thicknesses of web.
Subtask 25-11-00-860-052-A