DOC AIRBUS | TSM A320FAir Separation Module (ASM) 1YM Performance Degraded Fault
TASK 47-11-00-810-806-A
Air Separation Module (ASM) 1YM Performance Degraded Fault
1. Possible Causes
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Fault Confirmation
Subtask 47-11-00-740-060-B ** ON A/C NOT FOR ALL
Subtask 47-11-00-810-055-B ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:34:22 UTC
Air Separation Module (ASM) 1YM Performance Degraded Fault
1. Possible Causes
- ASM [1YM]
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | BRUSH - BRISTLED, SMALL |
| REFERENCE | DESIGNATION |
|---|---|
| AMM 47-10-43-920-001 | Air Separator Module Replacement |
| AMM 47-31-34-740-001 | BITE Test of the IGGS with Bleed Air |
| AMM 47-41-15-000-001 | Removal of the Oxygen Sensor |
| AMM 47-41-15-400-002 | Installation of the Oxygen Sensor |
Subtask 47-11-00-740-060-B ** ON A/C NOT FOR ALL
A. Not applicable, you cannot confirm this fault on the ground.
4. Fault IsolationSubtask 47-11-00-810-055-B ** ON A/C NOT FOR ALL
A. Procedure
(2) Examine all the ducts and connections between the ASM and the oxygen sensor for signs of air leakage.
(3) If there are no leaks:
(a) Remove the O2 sensor duct AMM 47-41-15-000-001 and examine its inner surface for signs of contamination.
(b) If there is contamination:
(4) If there are leaks:
(a) Replace the defective connections, refer to the CMM 471141 (V92003).
(c) Examine the 02 sensor duct and its connections for signs of air leakage.
(d) If there are leaks do again the previous step (2).
Subtask 47-11-00-740-061-B ** ON A/C NOT FOR ALL NOTE: Do the two subsequent steps at the same time. Two persons are necessary to do these steps.
(1) Do the BITE test of the IGGS with bleed air AMM 47-31-34-740-001. (2) Examine all the ducts and connections between the ASM and the oxygen sensor for signs of air leakage.
(3) If there are no leaks:
(a) Remove the O2 sensor duct AMM 47-41-15-000-001 and examine its inner surface for signs of contamination.
(b) If there is contamination:
- Clean the contamination with a BRUSH - BRISTLED, SMALL or similar.
- Replace the ASM [1YM] AMM 47-10-43-920-001.
(4) If there are leaks:
(a) Replace the defective connections, refer to the CMM 471141 (V92003).
NOTE: Before installation, clean the inner surface of the O2 sensor duct with a BRUSH - BRISTLED, SMALL or similar.
NOTE: Do the two subsequent steps at the same time. Two persons are necessary to do these steps.
(b) Do the BITE test of the IGGS with bleed air AMM 47-31-34-740-001. (c) Examine the 02 sensor duct and its connections for signs of air leakage.
(d) If there are leaks do again the previous step (2).
B. Do the BITE test of the IGGS with bleed air AMM 47-31-34-740-001.
NOTE: After the subsequent flight make sure that the fault does not continue.