Loss of the link GPS/CLOCK

TASK 31-21-00-810-807-A
Loss of the link GPS/CLOCK

1. Possible Causes

wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 312101
AMM 34-36-00-740-003	BITE Test of the MMR

3. Fault Confirmation
Subtask 31-21-00-710-053-B ** ON A/C NOT FOR ALL

A. Not applicable, the fault is evident.

4. Fault Isolation
Subtask 31-21-00-810-056-B ** ON A/C NOT FOR ALL

A. If the fault symptom is identified by the crew observation Clock not counting:

Do the test of the MMR AMM 34-36-00-740-003.
(1) If the result to the test is NO

Proceed to the MMR trouble shooting

(2) If the result to the test is YES

Do a check and repair the wiring from the MMR (40RT1) pin AB/9E, 9F to the CLOCK (2FS) pin A/E, F ASM 312101.

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