DOC AIRBUS | TSM A320FLoss of the Video on the lower ECAM DU from CDSS Controller
TASK 31-63-82-810-870-A
Loss of the Video on the lower ECAM DU from CDSS Controller
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 31-63-82-720-056-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 31-63-82-810-166-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:31:18 UTC
Loss of the Video on the lower ECAM DU from CDSS Controller
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ESPM 235323 | |
| ASM 237201 | |
| AMM 23-72-31-000-001 | Removal of the System Controller |
| AMM 23-72-31-400-001 | Installation of the System Controller |
| AMM 31-60-00-720-002 | Operational Test of the DMC/DU data bus |
| AMM 31-63-22-000-001 | Removal of the Display Unit |
| AMM 31-63-22-400-001 | Installation of the Display Unit |
Subtask 31-63-82-720-056-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 31-63-82-810-166-A ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
(1) Replace the CONTROLLER - COCKPIT DOOR SURVEILLANCE SYSTEM [9RA] AMM 23-72-31-000-001 and AMM 23-72-31-400-001.
(2) If the fault continues:
(a) Replace the DU-ECAM, LOWER [4WT2] AMM 31-63-22-000-001 and AMM 31-63-22-400-001.
(b) If the fault continues:
1 Check and repair the coaxial cable from:
Subtask 31-63-82-720-057-A ** ON A/C NOT FOR ALL (1) Replace the CONTROLLER - COCKPIT DOOR SURVEILLANCE SYSTEM [9RA] AMM 23-72-31-000-001 and AMM 23-72-31-400-001.
(2) If the fault continues:
(a) Replace the DU-ECAM, LOWER [4WT2] AMM 31-63-22-000-001 and AMM 31-63-22-400-001.
(b) If the fault continues:
1 Check and repair the coaxial cable from:
- The CDSS controller (9RA) pin AA/2T to lower ECAM DU (4WT2) AA/3.
ASM 237201 ESPM 235323.
B. Do the test given in Para. 3.