Installation of the In-Seat Power Supply Unit (ISPSU)

TASK 25-21-38-400-001-A
Installation of the In-Seat Power Supply Unit (ISPSU)

ZONE: 200

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CAP - PROTECTION

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE

C. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
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 25-21-00-710-002-A	Operational Test of the In-Seat Power-Supply System (PED Power Supply)
In-Seat Power-Supply Unit ** ON A/C NOT FOR ALL
In-Seat Power-Supply Unit ** ON A/C NOT FOR ALL
Seat Power-Supply Unit ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 25-21-38-860-050-A ** ON A/C NOT FOR ALL

A. Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).

Subtask 25-21-38-865-056-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	IFE/SEAT-POWER-PAX SYS	20MK	D08
** ON A/C NOT FOR ALL
2000VU	INSEAT POWER-MCU 2	59HP	B08
2000VU	INSEAT POWER-MCU 1	58HP	B05
** ON A/C NOT FOR ALL
2000VU	SEAT POWER-MCU 2	59HP	B08
2000VU	SEAT POWER-MCU 1	58HP	B05

4. Procedure
Subtask 25-21-38-210-050-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.

Subtask 25-21-38-420-050-A ** ON A/C NOT FOR ALL

B. Installation of the In-Seat Power Supply Unit (ISPSU)

In-Seat Power-Supply Unit ** ON A/C NOT FOR ALL

(1) Put the ISPSU (5) in position and lock the fasteners (6).
(2) Connect the electrical connectors:

CAUTION: MAKE SURE THAT THE BONDING STRAP(S) IS(ARE) CONNECTED BEFORE YOU CONNECT THE ELECTRICAL CONNECTOR(S).

CAUTION: MAKE SURE THAT THE SPRING LATCHES CORRECTLY HOLD THE CONNECTOR IN THE FULLY ENGAGED POSITION. THE SPRING LATCHES PREVENT UNWANTED MOVEMENT OF THE CONNECTOR, AND THUS THE RISK OF ARCING, WHICH CAN CAUSE DAMAGE TO THE UNIT.

(a) Install the bonding straps (10) with the washers (9) and the nuts (8) (Ref. AMM TASK 20-28-00-912-802).
(b) Remove the CAP-BLANKING from each electrical connector and receptacle.
(c) Make sure that all the electrical connections are clean and in the correct condition.
(d) Connect the electrical connectors (4) and (7) to the ISPSU (5).
(e) Lock the electrical connectors (4) with the latches (3).
(f) Make sure that all connectors that are not used have a CAP - PROTECTION.
(3) Put the cover (2) in position and lock the fasteners (1).

Subtask 25-21-38-420-050-Q ** ON A/C NOT FOR ALL

B. Installation of the In-Seat Power Supply Unit (ISPSU)

In-Seat Power-Supply Unit ** ON A/C NOT FOR ALL

(1) Put the ISPSU (11) in position and lock the fasteners (8).
(2) Connect the electrical connectors:

CAUTION: MAKE SURE THAT THE BONDING STRAP(S) IS(ARE) CONNECTED BEFORE YOU CONNECT THE ELECTRICAL CONNECTOR(S).

(a) Install the bonding straps (15) with the washers (14) and the nuts (13) (Ref. AMM TASK 20-28-00-912-802).
(b) Remove the CAP-BLANKING from each electrical connector and receptacle.
(c) Make sure that all the electrical connections are clean and in the correct condition.
(d) Connect the electrical connectors (9) and (12) to the ISPSU (11).
(e) Lock the electrical connectors (9) with the spring latches (10).
(3) Put the seat pan (2) in position.
(4) Install the spacers (5), the washers (6), the screws (7), the washers (4) and the nuts (3).
(5) Install the seat cushions (1).
(6) Make sure that the work area is clean and clear of tools and other items.

Subtask 25-21-38-420-050-RZ ** ON A/C NOT FOR ALL

B. Installation of the ISPSU

Seat Power-Supply Unit ** ON A/C NOT FOR ALL

(1) Hold the ISPSU (10) in position and engage the fasteners (7).
(2) Connect the electrical connectors:
(a) Connect the bonding strap (12) and install the washer (13) and the nut (14) (Ref. AMM TASK 20-28-00-912-802).
(b) Remove the CAP-BLANKING from each electrical connector and receptacle.
(c) Make sure that all the electrical connections are clean and in the correct condition.

CAUTION: MAKE SURE THAT THE BONDING STRAP(S) IS(ARE) CONNECTED BEFORE YOU CONNECT THE ELECTRICAL CONNECTOR(S).

(d) Connect the electrical connectors (8) and (11) to the ISPSU (10).

(e) Engage the spring latches (9).
(f) Make sure that all not used connectors have a CAP - PROTECTION.
(3) Put the cover (6) in position and engage the fasteners (5) on the tourist class seat.
(4) For the Business Class (B/C) seat:
(a) Put the cover (4) in position and engage the fasteners (5).
(b) Put the cover (3) in position and install the washer (2) and the screw (1).
(c) Tighten the screw (1).
(5) Make sure that the work area is clean and clear of tools and other items.

Subtask 25-21-38-865-052-A ** ON A/C NOT FOR ALL

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	IFE/SEAT-POWER-PAX SYS	20MK	D08
** ON A/C NOT FOR ALL
2000VU	INSEAT POWER-MCU 2	59HP	B08
2000VU	INSEAT POWER-MCU 1	58HP	B05
** ON A/C NOT FOR ALL
2000VU	SEAT POWER-MCU 2	59HP	B08
2000VU	SEAT POWER-MCU 1	58HP	B05

Subtask 25-21-38-710-050-A ** ON A/C NOT FOR ALL

D. Do the operational test of the in-seat power-supply system (Ref. AMM TASK 25-21-00-710-002).

5. Close-up
Subtask 25-21-38-862-050-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.03.31 23:30:29 UTC