DOC AIRBUS | TSM A320FFlaps - SFCC 1 (2) Gives PCU Valveblock 23CV (24CV) Valve Sensor Message
TASK 27-51-00-810-852-A
Flaps - SFCC 1 (2) Gives PCU Valveblock 23CV (24CV) Valve Sensor Message
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 27-51-00-710-079-A
Subtask 27-51-00-810-104-A
[Rev.8 from Aug 2018]
2026.04.04 04:27:40 UTC
Flaps - SFCC 1 (2) Gives PCU Valveblock 23CV (24CV) Valve Sensor Message
1. Possible Causes
- SLAT/FLAP CONTR.COMP. [21CV]
- SLAT/FLAP CONTR.COMP. [22CV]
- VALVE BLOCK-FLAP 1 [23CV]
- VALVE BLOCK-FLAP 2 [24CV]
- valve sensor
- aircraft wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ASM 275102 | |
| ASM 275103 | |
| AMM 27-51-34-000-001 | Removal of the SFCC |
| AMM 27-51-34-400-001 | Installation of the SFCC |
| AMM 27-54-53-000-001 | Removal of the Valve Blocks of the Power Control Unit (Flap) |
| AMM 27-54-53-400-001 | Installation of the Valve Blocks of the Power Control Unit (Flap) |
| AMM 31-32-00-860-006 | Procedure to Get Access to the SYSTEM REPORT/TEST F/CTL Page |
Subtask 27-51-00-710-079-A
A. Test
(1) At the MCDU, access the SYSTEM REPORT / TEST page and select F/CTL> AMM 31-32-00-860-006.
(2) Select <SFCCX (where X is the No. of the applicable SFCC).
(3) Select <SFCC/TEST, to do the SFCC BITE test:
(a) Set the MCDU to the MAIN MENU of the related SFCC and get access to the TROUBLESHOOTING DATA page AMM 31-32-00-860-006.
(b) If the fault message FLP 1(2) PCU VALVEBLOCK 23CV(24CV) VALVE SENSOR 27-54-53 shows with the
fault code 005 (for a BAE SFCC) or fault code 005 or 020 (for a Diehl SFCC):
4. Fault Isolation(1) At the MCDU, access the SYSTEM REPORT / TEST page and select F/CTL> AMM 31-32-00-860-006.
(2) Select <SFCCX (where X is the No. of the applicable SFCC).
(3) Select <SFCC/TEST, to do the SFCC BITE test:
- if the fault message FLP 1(2) PCU VALVEBLOCK 23CV(24CV) VALVE SENSOR 27-54-53 shows, do the Fault Isolation Procedure given in Para. 4.
(a) Set the MCDU to the MAIN MENU of the related SFCC and get access to the TROUBLESHOOTING DATA page AMM 31-32-00-860-006.
(b) If the fault message FLP 1(2) PCU VALVEBLOCK 23CV(24CV) VALVE SENSOR 27-54-53 shows with the
fault code 005 (for a BAE SFCC) or fault code 005 or 020 (for a Diehl SFCC):
- Replace the applicable valveblock as a first step (refer to the Fault Isolation Procedure).
NOTE: You can also refer to the In-Service Information (ISI) 27.51.00025 to receive more information of this intermittent fault.
Subtask 27-51-00-810-104-A
A. Procedure
(a) Do the test given in Para. 3.A:
(b) If the fault moves to the other SFCC position:
1 Put the serviceable SFCC back in its initial position.
2 Replace the initial SLAT/FLAP CONTR.COMP. [21CV] or SLAT/FLAP CONTR.COMP. [22CV] that has the fault.
(c) If the fault does not move to the other SFCC:
(a) Do a check of the aircraft wiring and repair as necessary ASM 275102 or ASM 275103.
(b) Do the test given in Para. 3.A.
NOTE: If you cannot confirm this fault on the ground and you get the related TROUBLESHOOTING DATA (see above), replace the applicable valveblock as a first step.
(1) Interchange the SFCCs AMM 27-51-34-000-001 and AMM 27-51-34-400-001. (a) Do the test given in Para. 3.A:
(b) If the fault moves to the other SFCC position:
1 Put the serviceable SFCC back in its initial position.
2 Replace the initial SLAT/FLAP CONTR.COMP. [21CV] or SLAT/FLAP CONTR.COMP. [22CV] that has the fault.
(c) If the fault does not move to the other SFCC:
- Install the SFCCs in their initial positions.
- Replace the applicable VALVE BLOCK-FLAP 1 [23CV] or VALVE BLOCK-FLAP 2 [24CV] , AMM 27-54-53-000-001 and AMM 27-54-53-400-001.
NOTE: The valve sensor is not a Line Replaceable Unit (LRU) and it is necessary to replace the valve block.
(3) If the fault continues: (a) Do a check of the aircraft wiring and repair as necessary ASM 275102 or ASM 275103.
(b) Do the test given in Para. 3.A.