Removal of the External Power Receptacle

TASK 24-41-51-000-001-A
Removal 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. Referenced Information

REFERENCE	DESIGNATION
External Power Receptacle

3. Job Set-up
Subtask 24-41-51-010-050-A

A. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE at the access door 811.
(2) Open the access door 811.
(3) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE at the access door 121AL.
(4) Open the access door 121AL.

Subtask 24-41-51-941-050-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 the access door 121AL to tell 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) 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) to tell persons not to start the APU.

4. Procedure
Subtask 24-41-51-020-050-A

A. Removal of the External Power Receptacle

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

(1) Loosen the four nuts (18).
(2) Remove the four nuts (18), lock-washers (19) and washers (17).
(3) Remove the protective cover (1).
(4) Loosen the four nuts (2).
(5) Remove the four nuts (2), lock-washers (3) and washers (4).
(6) Remove the four electrical wires (5).
(7) Loosen the two nuts (6).
(8) Remove the two nuts (6), lock-washers (7) and washers (8).
(9) Remove the two electrical wires (9).
(10) Loosen the three screws (10).
(11) Remove the three screws (10) and washers (11).
(12) Loosen the four studs (16).
(13) Remove the four studs (16) and washers (15).
(14) Remove the external power receptacle (14).
(15) Remove and discard the seal (13).

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