3. System Description__________________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
(Ref. Fig. 001)
R **ON A/C 401-499,
R (Ref. Fig. 001A)
R **ON A/C ALL
The DC ground/flight network comprises the following 28 VDC service busses: - 601PP, - 602PP. These sub-busbars are supplied directly from the ground power unit through the contactor 14XX via the TR2. The contactor 14XX is controlled by the MAINT BUS control switch 5XX located on panel 2000VU.
4. Operation/Control and Indicating________________________________ The operation is described in ATA Ref. 24-42-00.
NOTE : In case of TR2 overheat, the supply of the ground service network is____ cut off.
R 1EFF : ALL 1 24-43-00Page 2 1 1 Aug 01/05 1 1 1CES 1
Ground Service Network-General
Figure 001
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 24-43-00Page 3/4 1201-299, 301-399, 1Aug 01/05 1 1 1CES R Ground Service Network-General R Figure 001A
R 1EFF : 401-499, 1 24-43-00Page 5/6 1 1 Aug 01/05 1 1 1CES
DC Ground Service Bus Control-Component Location
Figure 002
DC Ground Service Bus Control - Component Location
Figure 002A
CONTACTOR (3PX) - REMOVAL/INSTALLATION
______________________________________
TASK 24-43-55-000-001
Removal of the DC Service Bus Ground Supply Contactor (3PX)
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 circuit breaker(s) safety clip(s)
No specific warning notice(s)
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 **ON A/C 001-049, 051-062, 101-105, 151-152, 201-205,
24-43-55-991-001 Fig. 401 R **ON A/C 063-099, 106-149, 153-199, 206-299, 301-399, 401-499,
24-43-55-991-001-A Fig. 401A
**ON A/C ALL
3. Job Set-up__________
Subtask 24-43-55-010-050
A. Get Access
R (1) Remove the Third Occupant seat (Ref. TASK 25-11-41-000-001).
R R (2) In the cockpit, remove the front panel on the bottom right side of the panel 120VU.
R (3) Put the access platform in position at the access door 121AL.
(4) Open the access door 121AL.
Subtask 24-43-55-860-050
B. Safety Precautions
R (1) Make sure that the external power connector is not connected to the aircraft EXT PWR receptacle.
R R R (2) Put warning notice(s) in position on the access door 121AL to tell persons not to connect the external power connector to the EXT PWR receptacle.
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