DOC AIRBUS | TSM A320FDMU receives no Data from the CPC 1
TASK 21-31-00-810-818-A
DMU receives no Data from the CPC 1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 21-31-00-710-084-A
Subtask 21-31-00-810-111-A
Subtask 21-31-00-860-067-A
[Rev.8 from Aug 2018]
2026.04.04 04:24:42 UTC
DMU receives no Data from the CPC 1
1. Possible Causes
- DMU [1TV]
- wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 21-31-00-710-002 | Operational Test of the Pressure Control and Monitoring |
| ASM 213103 | |
| AMM 31-36-00-710-001 | Test of the DMU |
| AMM 31-36-34-000-001 | Removal of the Data Management Unit (DMU) |
| AMM 31-36-34-400-001 | Installation of the Data Management Unit (DMU) |
Subtask 21-31-00-710-084-A
A. Do the Test of the DMU AMM 31-36-00-710-001.
4. Fault IsolationNOTE: Make sure that the circuit breakers 1HL, 2HL and 3HL are closed during the test.
Subtask 21-31-00-810-111-A
A. If the test gives the maintenance message NO PRESS CONTROL 1 DATA:
Subtask 21-31-00-710-085-A - do the operational test of the pressure control and monitoring system AMM 21-31-00-710-002.
- replace the DMU [1TV] AMM 31-36-34-000-001 and AMM 31-36-34-400-001.
- do a check and repair the wiring of the signal ARINC 429 OUT (BUS 1.1) from the CPC 1 (11HL) to the DMU (1TV) ASM 213103 and ASM 213103.
B. Do the test given in Para. 3.
5. Close-upSubtask 21-31-00-860-067-A
A. Put the aircraft back to its initial configuration.