(4)
 Remove the access platform(s).

 (5)
 Remove the warning notice(s). Subtask 49-42-52-865-055

 B.
 Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.

 Subtask 49-42-52-860-052
 C. Aircraft Maintenance Configuration
 (1) De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

 CONTACTOR - START (5KA,10KA) - REMOVAL/INSTALLATION
___________________________________________________
 TASK 49-42-55-000-001 Removal of the Start Contactors (5KA,10KA) 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 blanking caps No specific warning notices No specific access platform 0.5 m (1 ft. 8 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
25-11-41-000-001 Removal of the Third Occupant Seat 49-42-55-991-001 Fig. 401
 3. Job Set-up
__________ Subtask 49-42-55-010-050
 A. Get Access
 (Ref. Fig. 401/TASK 49-42-55-991-001)

 (1)
 Remove the third occupant seat (Ref. TASK 25-11-41-000-001)

 (2)
 In the cockpit, on the left lower side of the panel 120VU: - open the access door (1).

 EFF : ALL

49-42-55Page 401

 Start Contactors
 Figure 401/TASK 49-42-55-991-001
 EFF :  ALL  49-42-55 Page 402 
Feb 01/98
 CES 

 (3) Put the access platform at the access door 121AL.
 (4)
 Open the access door 121AL. Subtask 49-42-55-860-050

 B.
 Safety Precautions

 (1)
 Make sure that the external power connector is not connected to the aircraft EXT PWR receptacle.

 (2)
 Put a warning notice on the access door 121AL to tell persons not to connect the external power connector.

 (3)
 In the cockpit, on the overhead panel 35VU, make sure these pushbutton switches are released:

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

 (4)
 In the cockpit, put warning notices to tell persons not to operate the pushbutton switches on these overhead panels:

 -21VU (EMER ELEC PWR),
 -25VU (APU),
 -35VU (ELEC).
 4. Procedure
_________
 (Ref. Fig. 401/TASK 49-42-55-991-001) Subtask 49-42-55-020-050
 A. Removal of the Contactors
 (1)
 Disconnect the electrical connector (4).

 (2)
 Put blanking caps on the disconnected electrical connectors.

 (3)
 Loosen the captive screws (5) and remove the contactor (3) from the contactor base (2).

 NOTE : Do not remove the captive screws (5) and the crinkle washers
____
 from the contactor (3).

 EFF : ALL

49-42-55Page 403

 TASK 49-42-55-400-001
 Installation of the Start Contactors (5KA,10KA)
 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.) R No specific Torque Wrench : range 0.00 to 1.20 m.daN R (0.00 to 9.00 lbf.ft)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320飛機維護手冊 AMM 機載輔助動力 AIRBORNE AUXILIARY POWER4(118)