Replacement of the Fuse 5XB1

TASK 24-28-00-960-801-A
Replacement of the Fuse 5XB1

ZONE: 121
ZONE: 122

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
121	AVIONICS COMPARTMENT
122	AVIONICS COMPARTMENT
822

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	FUSE	AIPC 24-28-08-02-090
2	FUSE	AIPC 24-38-88-01-080

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-38-51-000-001-A	Removal of the Battery
TASK 24-38-51-400-001-A	Installation of the Battery
ESPM 2046200
Fuse 5XB1
FOR [2PB1] (BAT-1)
TASK 31-21-00-750-002-A	Procedure to Set the Clock

3. Job Set-up
Subtask 24-28-00-010-052-A

A. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at access door 822.
(2) Open access door 822.
(3) In the avionics compartment, open the access door of panel 105VU.

Subtask 24-28-00-860-054-A

B. Aircraft Maintenance Configuration
(1) Make sure that the external power connector is not connected to the aircraft EXT PWR receptacle.
(2) Make sure that the WARNING NOTICE(S) are in position on access door 121AL to tell persons not to connect the external power connector to the aircraft EXT PWR receptacle.
(3) In the cockpit, on the ELEC control panel 35VU, make sure that these pushbutton switches are released:

BAT 1, BAT 2
APU GEN
GEN 1, GEN 2
EXT PWR.

(4) In the cockpit, make sure that the WARNING NOTICE(S) are in position to tell persons not to operate the pushbutton switches on these overhead panels:

21VU (EMER ELEC PWR section)
25VU (APU section)
35VU (ELEC).

Subtask 24-28-00-020-050-A

C. Disconnection of the Two Batteries
(1) Disconnect the connectors from the batteries, refer to (Ref. AMM TASK 24-38-51-000-001).

4. Procedure
Subtask 24-28-00-960-050-A

A. Replacement of the Fuse

Fuse 5XB1

(1) Loosen the nut (3) and remove and discard the fuse (2).
(2) Install the new AIPC 24-28-08-02-090 FUSE (2) or AIPC 24-38-88-01-080 FUSE (2) to the terminals of the mount (1) as shown on the View B and C.
(3) Tighten the nut (3) ESPM 2046200.

Subtask 24-28-00-420-050-A

B. Connection of the Two Batteries
(1) Connect the electrical connectors to the batteries, refer to (Ref. AMM TASK 24-38-51-400-001).

Subtask 24-28-00-750-050-B

C. Adjustment of the Clock
(1) FOR [2PB1] (BAT-1)
Adjust the clock (Ref. AMM TASK 31-21-00-750-002).

5. Close-up
Subtask 24-28-00-410-052-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door of panel 105VU.
(3) Close access door 822.
(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.03.31 23:22:59 UTC