DOC AIRBUS | TSM A320FLoss of the MMR1 BUS GPS from the FMGC1
TASK 34-36-00-810-862-A
Loss of the MMR1 BUS GPS from the FMGC1
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 34-36-00-740-142-A 4. Fault Isolation
Subtask 34-36-00-810-129-A
[Rev.8 from Aug 2018]
2026.04.04 04:33:02 UTC
Loss of the MMR1 BUS GPS from the FMGC1
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 22-83-34-000-001 | Removal of the FMGC |
| AMM 22-83-34-400-001 | Installation of the FMGC |
| 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 34-36-31-400-001 | Installation of the ILS Receiver |
Subtask 34-36-00-740-142-A 4. Fault Isolation
Subtask 34-36-00-810-129-A
A. If the test gives the maintenance message
FMGC1(1CA1) BUS GPS/MMR1(40RT1):
FMGC2(1CA2) BUS GPS/MMR2(40RT2):
Subtask 34-36-00-740-143-A FMGC1(1CA1) BUS GPS/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.
- do the BITE test of the MMR2 AMM 34-36-00-740-003.
FMGC2(1CA2) BUS GPS/MMR2(40RT2):
- replace the MMR that you installed on the side 2.
- replace the FMGC-1 [1CA1] AMM 22-83-34-000-001 and AMM 22-83-34-400-001.
- do a check and repair the wiring from the FMGC1 to the MMR1 from pins AB/11A, 11B to pins AB/8C, 8D ASM 343602.
B. Do the test given in Para. 3.