Operational Test of the Captain and First Officer Seats

TASK 25-11-00-710-001-A
Operational Test of the Captain and First Officer Seats

WARNING: DO NOT PUT YOUR FINGERS BELOW THE SEAT BOTTOM WHEN YOU OPERATE THE V (VERTICAL) CONTROL LEVER. SUDDEN MOVEMENT OF THE SEAT IN THE DOWN DIRECTION CAN CATCH YOUR FINGERS BETWEEN THE SEAT BOTTOM AND THE SEAT BASE. THIS CAN CAUSE YOU INJURY.

ZONE: 211
ZONE: 212

1. Reason for the Job
To make sure that the Captain and/or the First Officer seat(s) operate(s) correctly.
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 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)

3. Job Set-up
Subtask 25-11-00-860-050-A

A. Aircraft Maintenance configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002)

Subtask 25-11-00-865-050-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	COCKPIT SEATS/SEAT CTL/F/O	1MS2	U14
122VU	COCKPIT SEATS/SEAT CTL/CAPT	1MS1	U11

4. Procedure
Subtask 25-11-00-710-050-C

A. Operational test of the manual controls.

ACTION	RESULT
1.Test of the horizontal movement
A.With the seat in the stowed position:
Operate the H control lever and put the seat in the maximum forward position.	The seat moves slowly and smoothly.
Release the H control lever.	The seat stays locked in this position.
Operate the H control lever and put the seat in the maximum rearward position.	The seat must move by 8.99 -0.078 in. or +0.078 in. (228.346 -1.981 mm or +1.981 mm).
Operate the H control lever and put the seat in the stowed position. Release the H control lever.	The seat stays locked in the stowed position.
2.Test of the vertical movement
A.With the seat in the down position:
Operate the V control lever. Let the seat move up.	The seat moves freely by 6.50 -0.078 in. or +0.078 in. (165.100 -1.981 mm or +1.981 mm) to the maximum up position.
Release the V control lever.	The seat stays locked in this position.
Operate the V control lever and push the seat to move it down.	The seat moves back to the maximum down position.
3.Test of the backrest reclining adjustment
Operate the R control lever and slowly put the backrest at an angle.	The maximum angle is 34 deg.C from the vertical.
Release the R control lever.	The backrest stays locked in its position.
Operate the R control lever.	The backrest goes back automatically to 7 deg.C from the vertical.

Subtask 25-11-00-710-051-A

B. Operational test of the electrical controls

ACTION	RESULT
1.Test of the horizontal movement A.Seat movement
Set the control switch S2 to forward.	The seat moves forward.
Release the control switch S2.	The seat stays locked in this position.
Set the control switch S2 to rearward.	The seat moves rearward.
Release the control switch.	The seat stays locked in this position.
B.Test of the maximum forward and rearward positions
Set the control switch S2 to the forward position until the seat is in the maximum forward position.	Make sure that the motor stops when the seat gets to the maximum forward position.
Set the control switch S2 to the rearward position until the seat gets to the maximum rearward position.	Make sure that the motor stops when the seat gets to the maximum rearward position.
2.Test of the vertical movement
A.Seat movement
Set the control switch S1 to up.	The seat moves up.
Release the control switch.	The seat stays locked in this position.
Set the control switch S1 to down.	The seat moves down.
Release the control switch.	The seat stays locked in this position.
B.Test of the maximum up and down positions
Set the control switch S1 to up until the seat is in the maximum up position.	Make sure that the motor stops when the seat gets to the maximum up position.
Set the control switch S1 to down until the seat gets to the maximum down position.	Make sure that the motor stops when the seat gets to the maximum down position.

5. Close-up
Subtask 25-11-00-860-051-A

A. Aircraft Maintenance Configuration
(1) Put the seat in the stowed position.
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.03.31 23:27:52 UTC