FDIMU Receives No Data from the FCDC 1 or FCDC 2 A320
1. Possible Causes:
-FCDC-1 (3CE1)
-FCDC-2 (3CE2)
-DMU/FDIU (FDIMU) (10TV)
-wiring
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
| Ref. AMM 27-96-00-710-001 | Operational Test of the FCDC |
| Ref. AMM 31-36-00-740-012 | Test of the Flight Data Interface and Management Unit (FDIMU) |
| Ref. AMM 31-36-34-000-002 | Removal of the FDIU/DMU (FDIMU) |
| Ref. AMM 31-36-34-400-002 | Installation of the FDIU/DMU (FDIMU) |
3. Fault Confirmation
SUBTASK 31-36-00-740-182-A
A. Do the FDIMU (10TV) fault monitoring test (AIDS-part) Ref. AMM 31-36-00-740-012.
NOTE: Make sure that the circuit breakers 5TV, 20CE2 on the panel 121VU and 20CE1 on the panel 49VU are closed during the test.
4. Fault Isolation
SUBTASK 31-36-00-810-119-A
A. If the test gives the maintenance message:
— FCDC1 (3CE1) / FDIMU (10TV) or
— FCDC2 (3CE2) / FDIMU (10TV)
(1) Do the operational test of the FCDC Ref. AMM 27-96-00-710-001.
(a) If the test gives a different maintenance message, you can find the related trouble shooting procedure in the applicable Page Block 02.
(2) If the fault continues:
— Do a check and if necessary repair the wiring between the FCDC-1 (3CE1) or FCDC-2 (3CE2) and the DMU/FDIU (FDIMU) (10TV) Ref. ASM 27-95-02 for FCDC 1 and Ref. ASM 27-95-03 for FCDC 2:
FCDC 1 Connector AA/5E to FDIMU Connector AA/3C
FCDC 1 Connector AA/5F to FDIMU Connector AA/3D
or
FCDC 2 Connector AB/5E to FDIMU Connector AB/3C
FCDC 2 Connector AB/5F to FDIMU Connector AB/3D
(3) If the fault continues:
— Replace the FDIMU (10TV) Ref. AMM 31-36-34-000-002 and Ref. AMM 31-36-34-400-002.
SUBTASK 31-36-00-740-183-A
B. Do the test given in Para. 3.
