Loss ot the MMR1 data on the ADIRU1

TASK 34-36-00-810-874-A
Loss ot the MMR1 data on the ADIRU1

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 34-36-00-740-162-A

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

4. Fault Isolation
Subtask 34-36-00-810-144-B

A. If the test gives the maintenance message MMR1-GPSSU1(40RT1-1SN1)/ ADIRU1(1FP1):

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 ADIRU1 :
pins AB/2C, 2D to pins AB/14D, 15D for the GNSS INPUT 1 DATA bus and pins AB/2A, 2B to pins AB/14J, 15J for the GNSS INPUT 1 TIME MARK bus ASM 343602.

Subtask 34-36-00-740-163-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:02 UTC