DOC AIRBUS | TSM A320FACSC1 / Pack 1 Bypass Valve Fault
TASK 21-61-00-810-868-A
ACSC1 / Pack 1 Bypass Valve Fault
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 21-61-00-710-157-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 21-61-00-810-205-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:24:56 UTC
ACSC1 / Pack 1 Bypass Valve Fault
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 21-61-00-710-001 | Operational Test of the Pack Temperature-Control System |
| ASM 216101 | |
| AMM 21-61-34-000-002 | Removal of the Air-Conditioning System Controller |
| AMM 21-61-34-400-002 | Installation of the Air-Conditioning System Controller |
| AMM 21-61-53-000-001 | Removal of the Turbine Bypass Valve |
| AMM 21-61-53-400-001 | Installation of the Turbine Bypass Valve |
Subtask 21-61-00-710-157-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 21-61-00-810-205-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ACSC1(47HH)/P1 BY PASS VALVE(10HH):
Subtask 21-61-00-720-057-A ** ON A/C NOT FOR ALL - swap the ACSC1 (47HH) and the ACSC2 (57HH) AMM 21-61-34-000-002 and AMM 21-61-34-400-002.
- swap back the ACSC2 (57HH) and replace the CONT-AIR COND SYSTEM 1 [47HH] (ACSC1 47HH).
- swap back the ACSC1 (47HH) and the ACSC2 (57HH).
- replace the VALVE-TURBINE BYPASS [10HH] AMM 21-61-53-000-001 and AMM 21-61-53-400-001.
- do a check and repair the wiring ASM 216101 from:
- the VALVE (10HH) to the ACSC1 (47HH) and,
- the VALVE (10HH) to ground.
B. Put the aircraft back to its initial configuration.