Loss of the GPSSU2 Input on the ADIRU1

TASK 34-58-00-810-802-A
Loss of the GPSSU2 Input on the ADIRU1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-14-00-740-001	Interface Test of the IR
AMM 34-36-31-000-001	Removal of the ILS Receiver
AMM 34-36-31-400-001	Installation of the ILS Receiver
AMM 34-58-31-000-001	Removal of the GPSSU
AMM 34-58-31-400-001	Installation of the GPSSU

3. Fault Confirmation
Subtask 34-58-00-740-052-A

A. Test
(1) Do the Interface test of the IR (system 1) AMM 34-14-00-740-001.

4. Fault Isolation
Subtask 34-58-00-810-051-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message GPSSU2 (1SN2):

read the POST FLIGHT REPORT for other GPSSU2 (1SN2) maintenance messages (ATA 34-58-31 source IR2, IR3).

(1) If there is a minimum of one maintenance message:

Subtask 34-58-00-810-051-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message GPSSU2 (1SN2):

read the POST FLIGHT REPORT for other GPSSU2 (1SN2) maintenance messages (ATA 34-58-31 source IR2, IR3).

NOTE: In this case the GPSSU2 message is for the GPS part of the MMR2.

(1) If there is a minimum of one maintenance message:

Subtask 34-58-00-740-053-A

B. Do the test given in Para. 3.

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