Removal of the In-Seat Power-Supply Unit

TASK 25-21-42-000-001-A
Removal of the In-Seat Power-Supply Unit

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 - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
ISPS Unit

3. Job Set-up
Subtask 25-21-42-861-050-A ** ON A/C NOT FOR ALL

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

Subtask 25-21-42-865-071-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	PED	50HP	B01
2000VU	PES MUSIC FWD - RH	24MK	D03
2000VU	PES-MUSIC-CABIN-LH	23MK	D02
2000VU	PES MUSIC CTL	21MK	D01

4. Procedure
Subtask 25-21-42-020-050-C ** ON A/C NOT FOR ALL

A. Removal of the ISPS Unit

ISPS Unit ** ON A/C NOT FOR ALL

(1) At the related passenger seat:
(a) Disengage the quick-release studs (1) and open the cover (2).
(b) Disconnect the electrical connectors (5), (6), (7), (8) and (9).

CAUTION: MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU DISCONNECT THEM. INCORRECT CONNECTION OF WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

1 Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

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

(c) Remove the nuts (10), the washers (11) and the electrical bonding straps (12).
(d) Pull the studs (3) and carefully remove the ISPS unit (4).

[Rev.9 from 2019] 2026.03.31 23:30:36 UTC