Loss of the MMR1 data on the ADIRU3

TASK 34-36-00-810-878-A
Loss of the MMR1 data on the ADIRU3

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-12-34-000-001	Removal of the ADIRU
AMM 34-12-34-400-001	Installation of the ADIRU
AMM 34-14-00-740-001	Interface Test of the IR
ASM 343602
AMM 34-36-31-000-001	Removal of the ILS Receiver
AMM 34-36-31-400-001	Installation of the ILS Receiver

3. Fault Confirmation
Subtask 34-36-00-740-168-A

A. Test
(1) Do the Interface test of the IR (system 3) AMM 34-14-00-740-001.

4. Fault Isolation
Subtask 34-36-00-810-147-B

A. If the test gives the maintenance message MMR1-GPSSU1(40RT1-1SN1)/ ADIRU3(1FP3):

NOTE: In this case the GPSSU1 message is for the GPS part of the MMR1.

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring from the MMR1 to the ADIRU3 :
pins AB/9E, 9F to pins AB/14D, 15D for the GNSS INPUT 3 DATA bus and pins AB/7E, 7F to pins AB/14J, 15J for the GNSS INPUT 3 TIME MARK bus ASM 343602.

Subtask 34-36-00-740-169-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:03 UTC