5. Close-up
________ Subtask 24-61-55-410-050
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the front panel on the bottom right side of the panel 120VU.
(3)
Install the Third Occupant seat (Ref. TASK 25-11-41-400-001).
(4)
Remove the warning notice(s).
(5)
Close the access door 121AL.
(6)
Remove the access platform(s).
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DC ESSENTIAL DISTRIBUTION - DESCRIPTION AND OPERATION
_____________________________________________________
1.
General
_______ (Ref. Fig. 001) The essential 28 VDC distribution network corresponds to busbars 4PP, 8PP and associated sub-busbars.
2.
Component Location
__________________
(Ref. Fig. 002)
-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF. -------------------------------------------------------------------------------8PH CNTOR-DC SHED ESS BUS 106VU 125 812 24-62-55
-------------------------------------------------------------------------------FIN I FUNCTIONAL DESIGNATION I PANELIZONEIACCESS I ATA I I I I DOOR I REF.
-------------------------------------------------------------------------------6PH HOLDER-FUSE 105VU 126 24-62-00 6PH1 FUSE 105VU 126 24-62-00
3. Operation
_________
R **ON A/C 001-049, 051-061, 101-105, 201-203,
The essential 28 VDC distribution network can be supplied:
-either by busbar 3PP (in fact by TR1) in normal configuration,
-by Essential TR in case of loss of one main TR, loss of both main TRs or
in emergency configuration. Part of this network (busbar 8PP) can be shed in emergency configuration during RAT extension and when CSM/G is switched off after landing (case of battery supply). In case of loss of supply, a warning is triggered on the ECAM system, (Ref. Fig. 003) In case of loss of busbars 4PP or 8PP, the ELEC page is automatically displayed on the ECAM lower display unit: (Ref. Fig. 004, 005)
R **ON A/C 062-099, 106-149, 204-299,
The essential 28 VDC distribution network can be supplied:
-either by busbar 3PP (in fact by TR1) in normal configuration,
-by Essential TR in case of loss of one main TR, loss of both main TRs or
in emergency configuration. Part of this network (busbar 8PP) can be shed in emergency configuration during RAT extension and as soon as the landing gear is extended (case of battery supply). In case of loss of supply, a warning is triggered on the ECAM system, (Ref. Fig. 003) In case of loss of busbars 4PP or 8PP, the ELEC page is automatically displayed on the ECAM lower display unit: (Ref. Fig. 004, 005)
R **ON A/C 151-199, 301-399, 401-499,
The essential 28VDC distribution network can be supplied :
-either by busbar 3PP (in fact by TR1) in normal configuration
-by Essential TR in case of loss of one main TR, loss of both main TRs or
emergency configuration. Part of this network (busbar 8PP) can be shed in emergency configuration for low aircraft speed. In case of supply loss, a warning is triggered on the ECAM system (Ref. Fig. 003) In case of loss of busbars 4PP or 8PP, ELEC page is automatically displayed on ECAM lower display unit. (Ref. Fig. 004, 005)
**ON A/C ALL
It must be noted that due to segregation rules between DC channels, the TR2 cannot supply the DC ESS busbar.
DC Essential Distribution - General
Figure 001
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DC Essential Distribution - Component Location
Figure 002
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DC Essential Distribution - ECAM Warnings
Figure 003
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INTENTIONALLY BLANK
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DC ESS BUS FAULT - Upper and Lower ECAM Display Unit Figure 004 (SHEET 1)
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DC ESS BUS FAULT - Upper and Lower ECAM Display Unit Figure 004 (SHEET 2)
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