W DOC AIRBUS | AMM A320F

Removal of the Start Contactors

TASK 49-42-55-000-001-A
Removal of the Start Contactors

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.
FIN: 10KA
FIN: 5KA
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific
AR
CAP - BLANKING
No specific
1
SOCKET DIA 13 MM (0,51 IN)
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
121AL
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 25-11-41-000-001-A
Removal of the Third Occupant Seat
F Start Contactors
3. Job Set-up
Subtask 49-42-55-010-050-A
A. Get Access
F Start Contactors
   (1) Remove the third occupant seat (Ref. AMM TASK 25-11-41-000-001)
   (2) In the cockpit, on the left lower side of the panel 120VU:
  • open the access door (1).
   (3) Put the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE at the access door 121AL.
   (4) Open the access door 121AL.
Subtask 49-42-55-860-050-A
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 NOTICE(S) to tell persons not to operate the pushbutton switches on these overhead panels:
  • 21VU (EMER ELEC PWR),
  • 25VU (APU),
  • 35VU (ELEC).
4. Procedure
Subtask 49-42-55-020-050-A
A. Removal of the Start Contactor(s)
   (1) Disconnect the electrical connector(s) (2).
   (2) Put CAP - BLANKING on the disconnected electrical connector(s) (2).
   (3) Use a SOCKET DIA 13 MM (0,51 IN) to loosen the captive screws (3) and remove the contactor(s) (4) from the DC Bus 1 Contactor Module (13PN).
NOTE: Do not remove the captive screws (3) and the crinkle washers from the contactor(s) (4).
[Rev.10 from 2021] 2026.04.01 01:30:42 UTC
"Aviabrain" 2025