4.
 Setting the years figure Press the SET knob once

5.
 Increase (or decrease) the figure for the year by turning the SET knob clockwise (or counterclockwise).

 6.
 Setting the month's figure Press the SET knob once

Increase (or decrease) the figurez for the month by turning the SET knob clockwise (or counterclockwise).

 7.
 Setting the day's figure Press the SET knob once

The two digits for the minutes start
flashing.
 (Ref. Fig. 501A/TASK 31-21-00-991-001-A)
(item 2).

The two digits for the minutes increase
(or decrease).

The two left digits for the hours start
flashing
 (Ref. Fig. 501A/TASK 31-21-00-991-001-A)
 (item 1).

The two left digits for the hours
increase (or decrease).

The two smaller digits at the right of
the time window start flashing.

The two smaller right digits for the
year increase (or decrease).

The two left digits for the month start
flashing.

The two left digits for the month
increase (or decrease).

The two digits for the days start
flashing.

R 1EFF : 106-149, 151-199, 201-299, 301-399, 1 31-21-00Page 507 1401-499, 1Aug 01/05 1 1 1CES 1

 -------------------------------------------------------------------------------
ACTION  RESULT
 -------------------------------------------------------------------------------Increase (or decrease) the figure The two digits for the days increase for the days by turning the SET (or decrease). knob clockwise (or counterclockwise).
 8. When all the needed figures are  The two right digits for the seconds correct the time display start are reset (they display 00) and start running at any time by turning counting. the GPS/INT/SET switch to the INT position.
 If the figure for the seconds are The clock internal time base is set.
 known move the selector switch to
 the INT position only when they
 have to change from 59 to 00.

 **ON A/C ALL
 Subtask 31-21-00-750-053
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 2TW, 8TW The time displayed on the lower ECAM display unit should be in accordance with the clock.
 5. Close-up
________
 Subtask 31-21-00-860-051
 A. Put the aircraft back to its initial configuration.
 (1)
 De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

 (2)
 Make sure that the work area is clean and clear of tool(s) and other items.

 1EFF : ALL 1 31-21-00Page 508 1 1 Feb 01/05R 1 1 1CES 1

 TASK 31-21-00-710-002 Operational Test of the Clock WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE
_______ YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT.
 1.
 Reason for the Job

__________________
 To make sure that the clock and the standby power supply operate correctly.

 2.
 Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002  Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 31-21-00-750-002 Procedure to set the Clock
 3. Job Set-up
__________ Subtask 31-21-00-861-051
 A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002)
 1EFF : ALL 1 31-21-00Page 509 1 1 Feb 01/00 1 1 1CES 1 Subtask 31-21-00-865-051

 B. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU CLOCK/NORM/SPLY 6FS F11
 **ON A/C 001-049, 051-061, 101-105, 201-203,
 121VU CLOCK/STBY/SPLY 4FS N03 R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
 121VU CLOCK/STBY/SPLY 4FS N02 **ON A/C ALL
 4. Procedure
_________
 **ON A/C 001-049, 051-099, 101-105, 201-203,

 Subtask 31-21-00-710-050
 A. Test
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the overhead panel, on the  On the R center instrument panel 400VU, panel 25VU: on the clock:
　
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