Installation of the Captain (First Officer) Seat Lumbar-Rest

TASK 25-11-67-400-001-A
Installation of the Captain (First Officer) Seat Lumbar-Rest

ZONE: 211
ZONE: 212
FIN: 3MS
FIN: 4MS

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
211	COCKPIT
212	COCKPIT

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
TASK 25-11-61-000-001-A	Removal of the Captain (First Officer) Seat Cushion
TASK 25-11-61-400-001-A	Installation of the Captain (First Officer) Seat Cushion
Captain (First Officer) Seat Lumbar-Rest

3. Job Set-up
Subtask 25-11-67-860-050-A

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the Captain (Firt Officer) seat cushion is removed (Ref. AMM TASK 25-11-61-000-001).

4. Procedure
Subtask 25-11-67-420-050-A

A. Installation of the Captain (First Officer) Seat Lumbar-Rest
(1) Clean the component interfaces and the adjacent area.
(2) Engage the lumbar rest (2) on the seat back structure (1).
(3) Engage the connectors (3) in the seat back structure (1).
(4) Push the two lumbar rest control-knobs (5) to install them.
(5) Install the two retainer rings (4).

5. Close-up
Subtask 25-11-67-410-050-A

A. Installation of the Seat Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the Captain (First Officer) seat cushion (Ref. AMM TASK 25-11-61-400-001).

Subtask 25-11-67-862-050-A

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

[Rev.10 from 2021] 2026.03.31 23:28:24 UTC