____________________________________________
1. General
_______
**ON A/C 001-049, 051-099, 101-105, 201-203,
(Ref. Fig. 001) R **ON A/C 106-149, 151-199, 201-299, 301-399, 401-499, Post SB 31-1133 For A/C 201-203, (Ref. Fig. 001A) **ON A/C ALL
Universal Coordinated Time (UTC) is provided by a fully independent electrical clock with built-in time base, located on the R center instrument panel 400VU. Moreover, the clock provides UTC in the form of an ARINC 429 format bus for the centralized fault display interface unit (CFDIU), the flight data interface unit (FDIU) and the two flight management and guidance computers (FMGC). The clock is powered by two electrical circuits with one circuit directly connected to the aircraft battery. This enables time to be counted in memory throughout the period that aircraft is parked.
2. Component Location
__________________
**ON A/C 001-049, 051-099, 101-105, 201-203,
(Ref. Fig. 002) R **ON A/C 106-149, 151-199, 201-299, 301-399, 401-499, Post SB 31-1133 For A/C 201-203, (Ref. Fig. 002A)
1EFF : ALL 1 31-21-00Page 1 1 1 Aug 01/05 1 1 1CES 1
Clock - Block Diagram
Figure 001
R 1EFF : 001-049, 051-099, 101-105, 201-203, 1 31-21-00Page 2 1 1 May 01/05 1 1 1CES 1
Clock - Block Diagram
Figure 001A
R 1EFF : 106-149, 151-199, 201-299, 301-399, 1 31-21-00Page 3 1401-499, 1Aug 01/05 1 1 1CES 1
Clock - Component Location
Figure 002
R 1EFF : 001-049, 051-099, 101-105, 201-203, 1 31-21-00Page 4 1 1 May 01/05 1 1 1CES 1
Clock - Component Location
Figure 002A
R 1EFF : 106-149, 151-199, 201-299, 301-399, 1 31-21-00Page 5 1401-499, 1Aug 01/05 1 1 1CES 1R **ON A/C ALL
-------------------------------------------------------------------------------FIN I FUNCTIONAL DESIGNATION I PANELIZONEIACCESS I ATA I I I I DOOR I REF. -------------------------------------------------------------------------------2FS CLOCK 400VU 212 31-21-21 33LP SW-INT LT/ANN LT 25VU 210
1EFF : ALL 1 31-21-00Page 6 1 1 Feb 01/00 1 1 1CES 1
3. System Description
__________________
**ON A/C 001-049, 051-099, 101-105, 201-203,
A. Presentation and Operation This self-contained clock with built-in time base is contained in a 3 ATI case. It features the controls and the information related to each of the following functions :
-time (UTC) : display in hours and minutes on a digital counter
-elapsed time (ET) : display in hours and minutes on a digital counter
-chronometer (CHR) : display in seconds and minutes by means of a sweep hand and a digital counter respectively
-date : display in lieu and place of UTC display by action on a pushbutton switch.
R **ON A/C 106-149, 151-199, 201-299, 301-399, 401-499,
Post SB 31-1133 For A/C 201-203,
A. Presentation and Operation This self-contained clock with built-in time base is contained in a 3 ATI case. It features the controls and the information related to each of the following functions :
-time (UTC) : display in hours and minutes on a digital counter
-elapsed time (ET) : display in hours and minutes on a digital counter
-chronometer (CHR) : display in seconds and minutes on a digital counter
-date : display in lieu and place of UTC display by action on a pushbutton switch.
**ON A/C ALL
(1) UTC
**ON A/C 001-049, 051-099, 101-105, 201-203,
(Ref. Fig. 003)
R **ON A/C 106-149, 151-199, 201-299, 301-399, 401-499,
Post SB 31-1133 For A/C 201-203,
(Ref. Fig. 003A)
1EFF : ALL 1 31-21-00Page 7 1 1 Aug 01/05 1 1 1CES 1
Clock - UTC/Elapsed Time Display
Figure 003
R 1EFF : 001-049, 051-099, 101-105, 201-203, 1 31-21-00Page 8 1 1 May 01/05 1 1 1CES 1
Clock - UTC/Elapsed Time Display
Figure 003A
R 1EFF : 106-149, 151-199, 201-299, 301-399, 1 31-21-00Page 9 1401-499, 1Aug 01/05 1 1 1CES 1R **ON A/C 001-049, 051-099, 101-105, 201-203,
UTC is displayed in digital form in the UTC window :
-two digits for the hours (item 1)
-
the two next digits for the minutes (item 2)
-
the next single digit for the tenths of minutes (item 4). A four-position selector switch identified UTC (item 5), located in the R lower corner on the face of the clock, provides the four following functions:
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