NO GPS 1 (GPS 2) data on MCDU GPS MONITOR page (dashes shown)

TASK 34-58-00-810-831-A
NO GPS 1 (GPS 2) data on MCDU GPS MONITOR page (dashes shown)

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-36-00-710-008	Operational Test of the GPS

3. Fault Confirmation
Subtask 34-58-00-740-106-B ** ON A/C NOT FOR ALL

A. Do the operational test of the GPS AMM 34-36-00-710-008.

4. Fault Isolation
Subtask 34-58-00-865-051-A ** ON A/C NOT FOR ALL

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	NAV/MMR/1	42RT1	G12
** ON A/C NOT FOR ALL
121VU	COM NAV/MMR/2	42RT2	K09
** ON A/C NOT FOR ALL
121VU	COM NAV/MMR/2	42RT2	L07

Subtask 34-58-00-810-084-B ** ON A/C NOT FOR ALL

B. If the test shows that there are no GPS 1 (GPS 2) data on the MCDU GPS MONITOR Page and that dashes are shown:
(1) Do a check for a maintenance message related to the GPSSU 1 (GPSSU2) or MMR 1 (MMR 2) on the POST FLIGHT REPORT (PFR):
(a) If there is no maintenance message:

Do a reset of the MMR 1 (MMR 2) or GPSSU 1 (GPSSU2) circuit breaker 42RT1 (42RT2).

(b) If there is a maintenance message:

Refer to the related trouble shooting procedure.

Subtask 34-58-00-740-107-B ** ON A/C NOT FOR ALL

C. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:33:34 UTC