Removal of the Battery Line Contactor

TASK 24-38-55-000-001-A
Removal of the Battery Line Contactor

WARNING: MAKE SURE THAT NO AC OR DC POWER IS CONNECTED TO THE AIRCRAFT ELECTRICAL CIRCUITS. THERE IS A RISK OF ELECTROCUTION IF THE AC OR DC POWER STAYS CONNECTED.

ZONE: 126
ZONE: 212
FIN: 6PB1
FIN: 6PB2

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	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
126	LATERAL AVIONIC COMPARTMENT
212	COCKPIT
121AL, 812, 822

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-38-51-000-001-A	Removal of the Battery
Contactors

3. Job Set-up
Subtask 24-38-55-010-050-B

A. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the avionics compartment doors 812 and 822.
(2) Open the avionics compartment doors 812 and 822.
(3) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position at access door 121AL.
(4) Open access door 121AL.

Subtask 24-38-55-941-050-A

B. Safety Precautions
(1) Make sure that the external power connector is not connected to the aircraft receptacle.
(2) Put WARNING NOTICE(S) on access door 121AL to tell the persons not to use the external power receptacle.
(3) In the cockpit, on the overhead ELEC panel 35VU, release these pushbutton switches:

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

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

21VU (EMER ELEC PWR)
35VU (ELEC).

(5) In the cockpit, on the APU section of the overhead panel 25VU, put WARNING NOTICE(S) in position to tell persons not to start the APU.
(6) Disconnect the electrical connectors of the two batteries, refer to (Ref. AMM TASK 24-38-51-000-001)

4. Procedure

CAUTION: REMOVE THE CONTACTOR ONLY AND NOT THE BASE OR THE MODULE WHERE THE WIRES ARE CONNECTED.

Subtask 24-38-55-020-051-A

A. Removal of the Contactor
(1) Disconnect the connector (4).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Loosen the two captive screws (2).

NOTE: Do not remove the captive screws (2) and the spring washers from the contactor (3).

(4) Disengage the contactor (3) from the base (5) and remove the contactor.

[Rev.10 from 2021] 2026.03.31 23:24:00 UTC