DOC AIRBUS | TSM A320FOutflow Valve Feedback Assembly Fault (CPC 1)
TASK 21-31-00-810-805-A
Outflow Valve Feedback Assembly Fault (CPC 1)
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 21-31-00-710-054-A
Subtask 21-31-00-810-196-A
[Rev.8 from Aug 2018]
2026.04.04 04:38:51 UTC
Outflow Valve Feedback Assembly Fault (CPC 1)
1. Possible Causes
VALVE-OUTFLOW (10HL), FEEDBACK ASSEMBLY VALVE-OUTFLOW (10HL), ELECTRONIC MODULE 1 - wiring
- 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 21-31-51-000-001 | Removal of the Outflow Valve (From Inside) |
| AMM 21-31-51-000-002 | Removal of the Outflow Valve (10HL) - Electronics Module 10HL-1 (10HL-2) |
| AMM 21-31-51-000-005 | Removal of the Outflow Valve - Feedback Assembly 10HL-6 |
| AMM 21-31-51-400-001 | Installation of the Outflow Valve (From Inside) |
| AMM 21-31-51-400-002 | Installation of the Outflow Valve (10HL) - Electronics Module 10HL-1 (10HL-2) |
| AMM 21-31-51-400-005 | Installation of the Outflow Valve - Feedback Assembly 10HL-6 |
Subtask 21-31-00-710-054-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.
NOTE: Before you do the fault isolation procedure you must make a note of:
- the part number of the OFV which is installed in the aircraft.
Subtask 21-31-00-810-196-A
A. Test Results
Subtask 21-31-00-810-199-A NOTE: This procedure is only applicable for:
(1) If one or both of the reports, LAST LEG REPORT, PREVIOUS LEG REPORT and/or the test gives the maintenance message, - Outflow Valve Part Numbers 9023-15703-81 and previous.
- OUTFL.V FEEDB ASSY 1 (78):
- replace the
VALVE-OUTFLOW (10HL), FEEDBACK ASSEMBLY (referred to as OFV (10HL)) AMM 21-31-51-000-005 and AMM 21-31-51-400-005.
- replace the
VALVE-OUTFLOW (10HL), ELECTRONIC MODULE 1 AMM 21-31-51-000-002 and AMM 21-31-51-400-002.
NOTE: The electronic module 1 is connected to the electrical connector 10HL-A.
(3) If the fault continues:- do a check and repair the wiring between the:
- OFV connector (10HL-D) pins A, B, C, D and E and the OFV connector (10HL-A) pins A, B, C, E and F,
- OFV connector (10HL-D) pin J and GND ASM 213101 and ASM 213103.
B. Test Results
Subtask 21-31-00-710-062-A NOTE: This procedure is only applicable for:
(1) If one or both of the reports, LAST LEG REPORT, PREVIOUS LEG REPORT and/or the test gives the maintenance message, - Outflow Valve Part Number 20790-01AA and onwards.
- OUTFL.V FEEDB ASSY 1 (78):
- replace the OUTFLOW VALVE [10HL] AMM 21-31-51-000-001 and AMM 21-31-51-400-001.
- do a check and repair the wiring between the:
- OFV connector (10HL-D) pins A, B, C, D and E and the OFV connector (10HL-A) pins A, B, C, E and F,
- OFV connector (10HL-D) pin J and GND ASM 213101 and ASM 213103.
C. Do the test as given in the Para. 3.A.