-21VU (EMER ELEC PWR section),
 -25VU (APU section),
 -35VU (ELEC).
 1EFF : ALL 1 24-51-55Page 402 1 1 May 01/04R 1 1 1CES 1

 Subtask 24-51-55-865-050
 C. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
122VU ELEC/AC PWR/SVCE/CTL 3XX V29
 4. Procedure
_________
 **ON A/C 001-049, 051-062, 101-105, 151-152, 201-205,

 (Ref. Fig. 401/TASK 24-51-55-991-001) R **ON A/C 063-099, 106-149, 153-199, 206-299, 301-399, 401-499,
 (Ref. Fig. 401A/TASK 24-51-55-991-001-A)
 **ON A/C ALL

 Subtask 24-51-55-020-050
 A. Removal of the Contactor CAUTION : REMOVE THE CONTACTOR ONLY AND NOT THE BASE OR THE MODULE WHERE
_______
 THE WIRES ARE CONNECTED.

 (1)
 Disconnect the electrical connector (1).

 (2)
 Put blanking caps on the disconnected electrical connector (1) and electrical receptacle (7).

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

 (4)
 Remove the contactor (3).

____
 from the contactor (3).

 Contactor
 Figure 401/TASK 24-51-55-991-001

R 1EFF : 001-049, 051-062, 101-105, 151-152, 1 24-51-55Page 404 1201-205, 1May 01/05 1 1 1CES 1

 Contactor Figure 401A/TASK 24-51-55-991-001-A
R 1EFF : 063-099, 106-149, 153-199, 206-299, 1 24-51-55Page 405 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1 TASK 24-51-55-400-001

 Installation of the AC Service Bus Normal Supply Contactor (12XN)
 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 access platform 0.5 m (1 ft. 8 in.)
 No specific Torque Wrench : range 1.084 to 1.299 lbf.ft

 (0.14 to 0.17 m.daN)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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
 25-11-41-000-001 Removal of the Third Occupant Seat
 25-11-41-400-001 Installation of the Third Occupant Seat

R **ON A/C 001-049, 051-062, 101-105, 151-152, 201-205,
 24-51-55-991-001 Fig. 401 -------------------------------------------------------------------------------

REFERENCE DESIGNATION
 -------------------------------------------------------------------------------

R **ON A/C 063-099, 106-149, 153-199, 206-299, 301-399, 401-499,
 24-51-55-991-001-A Fig. 401A
 **ON A/C ALL
 3. Job Set-up
__________
 Subtask 24-51-55-860-051
 A. Aircraft Maintenance Configuration
 (1)
 Make sure that the access platform is in position at the access door 121AL.

 (2)
 Make sure that the access door 121AL is open.

 (3)
 Make sure that the external power connector is not connected to the aircraft receptacle.

 (4)
 Make sure that, on the access door 121AL, there is a warning notice to tell persons not to connect the external power connector.

 (5)
 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.

 (6)
 Make sure that there is a warning notice in the cockpit to tell persons not to operate the pushbutton switches on these overhead panels:

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

 (7)
 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.

 (8)
 In the cockpit, make sure that the third occupant seat is removed (Ref. TASK 25-11-41-000-001).
　
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