DOC AIRBUS | TSM A320FLoss of the Bus from the CFDIU to the BMC1
TASK 36-11-00-810-857-A
Loss of the Bus from the CFDIU to the BMC1
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 36-11-00-710-158-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 36-11-00-810-105-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:33:45 UTC
Loss of the Bus from the CFDIU to the BMC1
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ASM 313204 | |
| AMM 31-32-34-000-001 | Removal of the CFDIU |
| AMM 31-32-34-400-001 | Installation of the CFDIU |
| AMM 36-11-00-740-001 | BITE Test of the BMC 1(2) |
| AMM 36-11-34-000-001 | Removal of the BMC |
| AMM 36-11-34-400-001 | Installation of the BMC |
Subtask 36-11-00-710-158-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 36-11-00-810-105-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message:
NO DATA FROM CFDIU
Subtask 36-11-00-710-159-A ** ON A/C NOT FOR ALL NO DATA FROM CFDIU
- replace the BMC-1 [1HA1] AMM 36-11-34-000-001 and AMM 36-11-34-400-001.
- do a check and repair the wiring of the ARINC 429 signal from the CFDIU (1TW) to the BMC1 (1HA1), pins AA/11F and AA/11G to pins AA/4C and AA/5C ASM 313204.
- replace the CFDIU [1TW] AMM 31-32-34-000-001 and AMM 31-32-34-400-001.
B. Do the test given in Para. 3.