Loss of the ADIRU3 Data on the MMR1 and/or MMR2

TASK 34-36-00-810-856-A
Loss of the ADIRU3 Data on the MMR1 and/or MMR2

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 34-36-00-740-003	BITE Test of the MMR
ASM 343602
AMM 34-36-31-000-001	Removal of the ILS Receiver
AMM 34-36-31-000-002
AMM 34-36-31-400-001	Installation of the ILS Receiver
AMM 34-36-31-400-002

3. Fault Confirmation
Subtask 34-36-00-740-128-A

A. Test
Do the BITE test of the MMR (system 1 and 2) AMM 34-36-00-740-003.

4. Fault Isolation
Subtask 34-36-00-810-120-A

A. If the tests give the maintenance messages
ADIRU3(1FP3)/MMR1(40RT1) and ADIRU3(1FP3)/MMR2(40RT2):

(1) If the fault continues:

do a check and repair the wiring between the ADIRU3 and the first terminal block for pins AB/10C, 11C of the ADIRU3 ASM 343602.

Subtask 34-36-00-810-124-A

B. If the test of the MMR1 gives the maintenance message ADIRU3(1FP3)/MMR1(40RT1):

swap the MMR-1 [40RT1] and the MMR-2 (40RT2) AMM 34-36-31-000-001 and AMM 34-36-31-400-001.

(1) If the test of the MMR2 gives the maintenance message ADIRU3(1FP3)/MMR2(40RT2):

(2) If the fault continues:

do a check and repair the wiring between the MMR1 and the first terminal block: for pins AB/8G, 8H of the MMR1 ASM 343602.

Subtask 34-36-00-810-125-A

C. If the test of the MMR2 gives the maintenance message ADIRU3(1FP3)/MMR2(40RT2):

swap the MMR-2 [40RT2] and the MMR-1 (40RT1) AMM 34-36-31-000-002 and AMM 34-36-31-400-002.

(1) If the test of the MMR1 gives the maintenance message ADIRU3(1FP3)/MMR1(40RT1):

(2) If the fault continues:

do a check and repair the wiring between the MMR2 and the first terminal block: for pins AB/8G, 8H of the MMR2 ASM 343602.

Subtask 34-36-00-740-129-A

D. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:01 UTC