DOC AIRBUS | TSM A320FOutlow Valve Mistakenly Reported Not Open On Ground
TASK 21-31-00-810-843-A
Outlow Valve Mistakenly Reported Not Open On Ground
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 21-31-00-710-134-A
Subtask 21-31-00-810-203-A
[Rev.8 from Aug 2018]
2026.04.04 04:24:44 UTC
Outlow Valve Mistakenly Reported Not Open On Ground
1. Possible Causes
- SDAC-1 [1WV1]
- SDAC-2 [1WV2]
- Outflow Valve Feedback-Assembly 10HL6
- wiring
- PRESS CONT 1 [11HL]
- OUTFLOW VALVE [10HL]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 21-31-00-710-002 | Operational Test of the Pressure Control and Monitoring |
| ASM 213101 | |
| ASM 213103 | |
| AMM 21-31-34-000-001 | Removal of the Cabin Pressure Controller |
| AMM 21-31-34-400-001 | Installation of the Cabin Pressure Controller |
| AMM 21-31-51-000-001 | Removal of the Outflow Valve (From Inside) |
| AMM 21-31-51-000-005 | Removal of the Outflow Valve - Feedback Assembly 10HL-6 |
| AMM 21-31-51-000-006 | Removal of the Outflow Valve (From Outside) |
| AMM 21-31-51-400-001 | Installation of the Outflow Valve (From Inside) |
| AMM 21-31-51-400-005 | Installation of the Outflow Valve - Feedback Assembly 10HL-6 |
| AMM 21-31-51-400-006 | Installation of the Outflow Valve (From Outside) |
| AMM 31-55-34-000-001 | Removal of the SDAC |
| AMM 31-55-34-400-001 | Installation of the SDAC |
Subtask 21-31-00-710-134-A
A. Test
(1) Do the operational test of the pressure control and monitoring system AMM 21-31-00-710-002.
4. Fault Isolation(1) Do the operational test of the pressure control and monitoring system AMM 21-31-00-710-002.
Subtask 21-31-00-810-203-A
A. Test Results
Subtask 21-31-00-810-204-A NOTE: This procedure is only applicable for:
(1) If the POST FLIGHT REPORT gives the maintenance message: - Outflow Valve Part Numbers 9023-15705-81 and previous.
- CAB PR OUTFLOW VALVE NOT OPEN and a visual inspection of the outflow valve shows that it is open, then:
- replace the SDAC-1 [1WV1] AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
- replace the SDAC-2 [1WV2] AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
- replace the Outflow Valve Feedback-Assembly 10HL6 AMM 21-31-51-000-005 and AMM 21-31-51-400-005.
- do a check and repair the wiring between the:
- OFV connector (10HL-D) pin F and the CPC connector (11HL-AB) pin 1D.
- OFV connector (10HL-D) pin G and the CPC connector (11HL-AB) pin 2D.
- OFV connector (10HL-D) pin H and the CPC connector (11HL-AB) pin 3D ASM 213101 ASM 213103.
- replace the PRESS CONT 1 [11HL] AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
B. Test Results
Subtask 21-31-00-710-135-A NOTE: This procedure is only applicable for:
(1) If the POST FLIGHT REPORT gives the maintenance message: - Outflow Valve Part Number 20790-01AA and onwards.
- CAB PR OUTFLOW VALVE NOT OPEN and a visual inspection of the outflow valve shows that it is open, then:
- replace the SDAC-1 [1WV1] AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
- replace the SDAC-2 [1WV2] AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
- do a check and repair the wiring between the:
- OFV connector (10HL-D) pin F and the CPC connector (11HL-AB) pin 1D.
- OFV connector (10HL-D) pin G and the CPC connector (11HL-AB) pin 2D.
- OFV connector (10HL-D) pin H and the CPC connector (11HL-AB) pin 3D ASM 213101 ASM 213103.
- replace the OUTFLOW VALVE [10HL] AMM 21-31-51-000-001 and AMM 21-31-51-400-001 or or AMM 21-31-51-000-006 and AMM 21-31-51-400-006.
- replace the PRESS CONT 1 [11HL] AMM 21-31-34-000-001 and AMM 21-31-34-400-001.
C. Do the test as given in the Para. 3.A.