4. Procedure
_________
 (Ref. Fig. 401/TASK 24-41-51-991-001)
 Subtask 24-41-51-020-050
 A. Removal of the External Power Receptacle CAUTION : MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU
_______ R DISCONNECT THEM. INCORRECT CONNECTION OF WIRES WILL CAUSE R DAMAGE TO EQUIPMENT.
 (1)
 Loosen the 4 nuts (14).

 (2)
 Remove the 4 nuts (14) and the washers (15, 13).

 (3)
 Remove the protective cover (1).

 (4)
 Loosen the 6 nuts (3).

 (5)
 Remove the nuts (3) and the washers (4).

 (6)
 Remove the electrical wires (5).

 (7)
 Loosen the 3 screws (2).

 (8)
 Remove the screws (2) and the washers (6).

 (9)
 Remove the 4 studs (12) and the 4 washers (11).

 External Power Receptacle
 Figure 401/TASK 24-41-51-991-001
 1EFF :  ALL  1  24-41-51 Page 403 
1  1  Feb 01/98
 1  1
 1CES  1

 (10)
 Remove the external power receptacle (10).

 (11)
 Remove and discard the seal (9).

 TASK 24-41-51-400-001

 Installation of the External Power Receptacle (20XG)
 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.

 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice
 No specific warning notices
 No specific access platform 0.5 m (1 ft. 8 in.)
 No specific access platform 1.6 m (5 ft. 3 in.)

 B. Expendable Parts
 -------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
9 seal 24-41-01 01 -040
 C. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R 20-21-15-912-001 Tightening Torques for Electrical Component Fasteners 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 24-41-51-991-001 Fig. 401

 3. Job Set-up
__________
 Subtask 24-41-51-860-050
 A. Aircraft Maintenance Configuration
 (1)
 Make sure that the access platform is in position at the access door

 811.

 (2)
 Make sure that the access door 811 is open.

 (3)
 Make sure that the access platform is in position at the access door 121AL.

 (4)
 Make sure that the 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 is in position on the access door 121AL to tell persons not to use the external power receptacle.

 (7)
 In the cockpit, on the 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 notices 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 the overhead panel 25VU, make sure that a warning notice is in position to tell persons not to start the APU.

 4. Procedure_________
 (Ref. Fig. 401/TASK 24-41-51-991-001)
 Subtask 24-41-51-420-050
 A. Installation of the External Power Receptacle
R R  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 seal (9) on its support (7).
 (2) Put the external power receptacle (10) in position.
　
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