DOC AIRBUS | TSM A320FFailure of the CSAS Detected by the IGGS
TASK 21-58-00-810-807-A
Failure of the CSAS Detected by the IGGS
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 21-58-00-710-062-A ** ON A/C NOT FOR ALL
Subtask 21-58-00-810-056-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:24:50 UTC
Failure of the CSAS Detected by the IGGS
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ASM 215301 | |
| AMM 21-58-00-710-001 | Operational Test of the Conditioned Service Air System without Bleed Air |
| AMM 21-58-34-000-001 | Removal of the CSAS Control Unit |
| AMM 21-58-34-400-001 | Installation of the CSAS Control Unit |
| AMM 47-31-34-000-001 | Removal of the IGGS Controller Unit |
| AMM 47-31-34-400-001 | Installation of the IGGS Controller Unit |
Subtask 21-58-00-710-062-A ** ON A/C NOT FOR ALL
A. Do the operational test of the conditioned service air system without bleed air AMM 21-58-00-710-001.
4. Fault IsolationSubtask 21-58-00-810-056-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message CSAS CTL UNIT (100HW)/IGGS CTL UNIT (1YA):
Subtask 21-58-00-710-063-A ** ON A/C NOT FOR ALL - replace the CSAS CONTROL UNIT [100HW] AMM 21-58-34-000-001 and AMM 21-58-34-400-001.
- replace the IGGS CTL UNIT [1YA] AMM 47-31-34-000-001 and AMM 47-31-34-400-001.
- do a check and repair the wiring from:
- the CSAS CONTROL UNIT (100HW) to the IGGS CONTROL UNIT (1YA) ASM 215301.
B. Do the test as given in the Para. 3.A.