Detailed Inspection of Seat Attachments, Seat Structure, Seat Belts, Buckles and Baggage Bar

TASK 25-21-00-210-001-A
Detailed Inspection of Seat Attachments, Seat Structure, Seat Belts, Buckles and Baggage Bar

ZONE: 200

1. Reason for the Job
Refer to the MPD TASK: 252100-01
DETAILED INSPECTION OF SEAT ATTACHMENTS, SEAT STRUCTURE, SEAT BELTS, BUCKLES AND BAGGAGE BAR.
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE

B. Referenced Information

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

3. Job Set-up
Subtask 25-21-00-861-050-A

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001)

4. Procedure
Subtask 25-21-00-210-055-A

A. Detailed Inspection of Seat Structure, Baggage Bar and Seat Attachments
(1) Remove the seat cushion and the backrest cushion from the seat.
(2) Make sure that the seat structure is not damaged or cracked.

NOTE: Legs, beams, seat pan, backrest, headrest, armrest and baggage restraint bar are parts of the seat structure.

(3) Make sure that the parts of the seat structure have no corrosion or deformation.
(4) Make sure that the parts of the seat structure are not loose or missing.
(5) Make sure that the baggage restraint bar is attached to the seat legs.
(6) Make sure that all the seat attachments are correctly installed:
(a) If necessary, remove the seat rail cover.
(b) Make sure that there is no damage or cracks in the seat attachments.
(c) Make sure that the seat attachments have no corrosion or deformation.
(d) Make sure that you can see the torque marks on the heads of the screws.
(e) Make sure that the seat attachments are not loose or missing.
(f) If the seat rail cover is removed, install it.
(7) Install the seat cushion and the backrest cushion of the seat.

Subtask 25-21-00-210-057-A

B. Detailed Inspection/Check of the Seat Belts
(1) Make sure that the seat belt is correctly attached.
(2) Make sure that the seat belt webbing and the belt seams have no signs of damage:
(a) Do a check of the webbing for:

Cut or worn edges
Damaged stitching
Broken fabric threads
Tears
Chafing
Too much deterioration
Too much fusing
Felting (felting is when the webbing became more flexible, softer and thicker)
Frayed webbing (frayed webbing shows when the fiber in the webbing is broken).

NOTE: Light wear of the webbing is permitted.

(b) Replace the seat belt, if:

The thickness of the lap belt webbing increases to more than 1.9 mm (0.075 in.).
The edges are cut or worn.
The quantity of frayed webbing is more than 10% of the web width.
The quantity of frayed webbing is more than 203.2 mm (8.0000 in.) of the web length.
There are more than 15 broken threads in other locations than the edges.
More than 15 stitches in the stitch pattern are broken.

(3) Make sure that the seat belt attachments have no signs of cracks, dents, corrosion, burrs or scratches.
(4) Make sure that the buckles and tips have no signs of cracks, dents, corrosion, burrs or scratches.
(5) Make sure that the seat belt buckle locks/unlocks correctly.

5. Close-up
Subtask 25-21-00-210-051-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.

Subtask 25-21-00-862-050-A

B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001)

[Rev.10 from 2021] 2026.03.31 23:30:18 UTC