Installation of the External Power Receptacle

TASK 24-41-51-400-001-A
Installation of the External Power Receptacle

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: 120
FIN: 20XG

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 1M (3 FT)-ADJUSTABLE
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
120	AVIONICS COMPARTMENT
121AL, 811

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
13	SEAL	AIPC 24-41-01-01-040
13	SEAL	AIPC 24-41-81-01-090

D. 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)
ESPM 2045930
External Power Receptacle

3. Job Set-up
Subtask 24-41-51-860-050-A

A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at access door 811.
(2) Make sure that access door 811 is open.
(3) Make sure that ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position at access door 121AL.
(4) Make sure that access door 121AL is open.
(5) Make sure that the external power connector is not connected to the aircraft receptacle.
(6) Make sure that a WARNING NOTICE(S) is in position on access door 121AL to tell persons not to use the external power receptacle.
(7) In the cockpit, on overhead ELEC panel 35VU, make sure that these pushbutton switches are released:

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

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

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

(9) In the cockpit, on the APU section of overhead panel 25VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the APU.

4. Procedure
Subtask 24-41-51-420-050-A

A. Installation of the External Power Receptacle

CAUTION: REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU CONNECT THE ELECTRICAL WIRES. INCORRECT CONNECTION OF THE WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(1) Put a new AIPC 24-41-01-01-040 SEAL (13) or AIPC 24-41-81-01-090 SEAL (13) on its support (12).
(2) Put the external power receptacle (14) in position.
(3) Install the four washers (15) and studs (16) on the external power receptacle (14), then tighten the studs (16) ESPM 2045930.
(4) Install the three washers (11) and screws (10) and then tighten the screws (10) ESPM 2045930.
(5) Install the two electrical wires (9).
(6) Install the two washers (8), lock washers (7) and nuts (6) and then tighten the nuts (6) ESPM 2045930.
(7) Install the four electrical wires (5).
(8) Install the four washers (4), lock washers (3) and nuts (2) and then tighten the nuts (2) ESPM 2045930.
(9) Install the protective cover (1).
(10) Install the four washers (17), lock washers (19) and nuts (18) and then tighten the nuts (18) ESPM 2045930.

Subtask 24-41-51-710-050-A

B. Test of the External Power Supply
(1) Make sure that the aircraft electrical circuits are correctly energized with the external power supply (Ref. AMM TASK 24-41-00-861-002).

5. Close-up
Subtask 24-41-51-862-050-A

A. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 24-41-51-410-050-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(3) Close access door 811.
(4) Close access door 121AL.
(5) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:24:25 UTC