Loss of Synchronization between the Clock and the CFDIU

TASK 31-21-00-810-808-A
Loss of Synchronization between the Clock and the CFDIU

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-21-00-750-002	Procedure to set the Clock

3. Fault Confirmation
Subtask 31-21-00-700-050-A

A. Test

(1) Do a print-out of a post flight report:

ACTION	RESULT
On the MCDU:	On the MCDU:
1.Turn the BRT knob.	The MCDU comes on.
2.Push the MCDU MENU mode key.	The MCDU MENU page comes into view.
3.Push the line key adjacent to the CMS indication.	The MAINTENANCE MENU page comes into view.
4.Push the line key 1R adjacent to the PRINT indication.	The printer gives the post-flight report print-out.

(2) Do a check of the time and the date:

In the post-flight report header, and
On the clock (2FS).

4. Fault Isolation
Subtask 31-21-00-810-058-A

A. If the time and/or the date in the post-flight report header are different from the time and/or the date shown on the clock:

Do the procedure to set the clock AMM 31-21-00-750-002.

Subtask 31-21-00-740-057-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:29:48 UTC