DOC AIRBUS | TSM A320FFLP FPPU or SFCC Interface Fault
TASK 27-51-00-810-804-A
FLP FPPU or SFCC Interface Fault
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 27-51-00-865-062-A
Subtask 27-51-00-810-053-A
Subtask 27-51-00-942-053-A
[Rev.8 from Aug 2018]
2026.04.04 04:27:36 UTC
FLP FPPU or SFCC Interface Fault
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 27-50-00-866-008 | Extension of the Flaps on the Ground |
| AMM 27-50-00-866-009 | Retraction of the Flaps on the Ground |
| ASM 275106 | |
| ASM 275107 | |
| AMM 27-51-19-000-001 | Removal of the Feed Back Position Pick-Off Unit |
| AMM 27-51-19-400-001 | Installation of the Feed Back Position Pick-Off Unit |
| AMM 27-51-34-000-001 | Removal of the SFCC |
| AMM 27-51-34-400-001 | Installation of the SFCC |
| AMM 27-54-00-710-001 | Operational Test of the Flap System |
Subtask 27-51-00-865-062-A
A. Table of the circuit breakers used in this procedure:
Subtask 27-51-00-710-053-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B07 |
| 121VU | FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2 | 8CV | Q21 |
B. Reset and Initialization
(1) At the circuit breakers:
(a) Open the circuit breakers.
(b) Wait for 3 seconds and close the circuit breakers.
(c) Wait for 60 seconds.
(2) Move the flaps AMM 27-50-00-866-008 AMM 27-50-00-866-009.
(a) Examine the UPPER ECAM and the SD FLT/CTL page for the fault warnings and System status.
(b) Access the FLP ON GROUND FAULTS log and do a check of the ground log.
(c) If an UPPER ECAM warning, SD FLT/CTL status and a ground log fault message, is displayed do the Fault Isolation.
(d) If the UPPER ECAM, SD FLT/CTL status and the FLP ON GROUND FAULTS log are clear. No further maintenance actions are required.
4. Fault Isolation(1) At the circuit breakers:
(a) Open the circuit breakers.
(b) Wait for 3 seconds and close the circuit breakers.
(c) Wait for 60 seconds.
(2) Move the flaps AMM 27-50-00-866-008 AMM 27-50-00-866-009.
(a) Examine the UPPER ECAM and the SD FLT/CTL page for the fault warnings and System status.
(b) Access the FLP ON GROUND FAULTS log and do a check of the ground log.
(c) If an UPPER ECAM warning, SD FLT/CTL status and a ground log fault message, is displayed do the Fault Isolation.
(d) If the UPPER ECAM, SD FLT/CTL status and the FLP ON GROUND FAULTS log are clear. No further maintenance actions are required.
Subtask 27-51-00-810-053-A
A. Procedure
(1) Interchange SFCC1 and SFCC2
AMM 27-51-34-000-001 and AMM 27-51-34-400-001.
(a) If the fault moves to the other SFCC position:
1 Install the serviceable SFCC in its initial position.
2 Replace the defective SLAT/FLAP CONTR.COMP. [21CV] ( SLAT/FLAP CONTR.COMP. [22CV] ).
(b) If the fault does not move to the other SFCC position:
(a) Open, safety and tag these circuit breakers:
(c) Remove the safety clips and the tags and close the two circuit breakers.
(d) Wait 60 seconds for SFCC initialization.
(e) Get access to the FLP ON GROUND FAULTS page and do a check of the ground log.
(f) If the fault moves to the other SFCC:
1 Open, safety and tag the two circuit breakers.
2 Replace the FPPU-FLAP [27CV] ,
AMM 27-51-19-000-001 AMM 27-51-19-400-001.
(g) Make sure that the related electrical connectors are correctly installed.
(h) If the fault remains in the same circuit:
1 Install the related electrical connectors in their initial positions.
2 Do a check and repair the aircraft wiring between the FPPU and the applicable SFCC
ASM 275106 ASM 275107.
3 Remove the safety clips and the tags and close the two circuit breakers.
4 Wait 60 seconds for SFCC initialization.
5 Get access to the FLP ON GROUND FAULTS page and do a check of the ground log.
6 Make sure that there are no fault messages.
(3) After the replacement or the repair of the wiring:
5. Close-up(1) Interchange SFCC1 and SFCC2
AMM 27-51-34-000-001 and AMM 27-51-34-400-001.
(a) If the fault moves to the other SFCC position:
1 Install the serviceable SFCC in its initial position.
2 Replace the defective SLAT/FLAP CONTR.COMP. [21CV] ( SLAT/FLAP CONTR.COMP. [22CV] ).
(b) If the fault does not move to the other SFCC position:
- Install the SFCCs in their initial positions.
- Do step (2).
(a) Open, safety and tag these circuit breakers:
- 6CV and
- 8CV.
(c) Remove the safety clips and the tags and close the two circuit breakers.
(d) Wait 60 seconds for SFCC initialization.
(e) Get access to the FLP ON GROUND FAULTS page and do a check of the ground log.
(f) If the fault moves to the other SFCC:
1 Open, safety and tag the two circuit breakers.
2 Replace the FPPU-FLAP [27CV] ,
AMM 27-51-19-000-001 AMM 27-51-19-400-001.
(g) Make sure that the related electrical connectors are correctly installed.
(h) If the fault remains in the same circuit:
1 Install the related electrical connectors in their initial positions.
2 Do a check and repair the aircraft wiring between the FPPU and the applicable SFCC
ASM 275106 ASM 275107.
3 Remove the safety clips and the tags and close the two circuit breakers.
4 Wait 60 seconds for SFCC initialization.
5 Get access to the FLP ON GROUND FAULTS page and do a check of the ground log.
6 Make sure that there are no fault messages.
(3) After the replacement or the repair of the wiring:
- Do the operational test of the flap system AMM 27-54-00-710-001.
Subtask 27-51-00-942-053-A
A. Remove the ground support and maintenance equipment, the special and standard tools and all other items.
Subtask 27-51-00-860-053-A B. Put the aircraft back to its initial configuration.