DOC AIRBUS | TSM A320FCSU Sensor Out of Adjustment (Sensor out of valid region) No WTB Set
TASK 27-51-00-810-811-A
CSU Sensor Out of Adjustment (Sensor out of valid region) No WTB Set
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 27-51-00-710-058-A
Subtask 27-51-00-810-058-A
Subtask 27-51-00-942-060-A
[Rev.8 from Aug 2018]
2026.04.04 04:27:37 UTC
CSU Sensor Out of Adjustment (Sensor out of valid region) No WTB Set
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 275102 | |
| AMM 27-51-17-000-001 | Removal of the Command Sensor Unit |
| AMM 27-51-17-400-001 | Installation of the Command Sensor 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 27-51-00-710-058-A
A. SFCC System Operational Test
(1) Move the slats and flaps control lever from and back to the initial position.
(a) Examine the UPPER ECAM and the SD FLT/CTL page to see if the ECAM WARNING goes out of view.
(b) If the ECAM WARNING goes out of view, get access to the FLP ON GROUND FAULTS page and do a check of the ground log.
(2) Do the operational test of the flaps. AMM 27-54-00-710-001
(a) If the ECAM warning FLAPS FAULT and/or
(b) If the FLP ON GROUND FAULTS fault message SLT/FLP CSU 51CV show(s):
4. Fault Isolation(1) Move the slats and flaps control lever from and back to the initial position.
(a) Examine the UPPER ECAM and the SD FLT/CTL page to see if the ECAM WARNING goes out of view.
(b) If the ECAM WARNING goes out of view, get access to the FLP ON GROUND FAULTS page and do a check of the ground log.
(2) Do the operational test of the flaps. AMM 27-54-00-710-001
(a) If the ECAM warning FLAPS FAULT and/or
(b) If the FLP ON GROUND FAULTS fault message SLT/FLP CSU 51CV show(s):
- Do the fault isolation.
Subtask 27-51-00-810-058-A
A. Procedure
(1) Set MENU MODE and go to the sub-MENU, SYSTEM DATA FLAPS.
(a) Push the line key 3L, (DICRETE INPUTS).
(b) The named SFCC trasmits the DISCRETE INPUTS page (this page is transmitted every 5 seconds).
(c) Set the flap/slat control lever (CSU LEVER) to each flap/slat position.
(d) Compare the CSU switch banks A and B:
(e) If a difference is found, (reference table 1 page block 301).
(f) Replace the defective CSU [51CV] AMM 27-51-17-000-001 and AMM 27-51-17-400-001.
(g) If no difference is found, do the next step.
(2) Swap SFCC 1 with SFCC 2
AMM 27-51-34-000-001 and AMM 27-51-34-400-001.
(a) If the fault moves to the other SFCC:
1 Swap back the serviceable SFCC.
2 Replace SLAT/FLAP CONTR.COMP. [21CV] or SLAT/FLAP CONTR.COMP. [22CV] that shows the fault.
(b) If the fault does not move to the other SFCC:
(a) Examine the ECAM EWD and the SD FLT/CTL page and make sure that the ECAM WARNING goes out of view.
(b) If the ECAM WARNING goes out of view, get access to the FLP ON GROUND FAULTS page and do a check of the ground log.
(4) If the fault continues, do a check of the aircraft wiring between the SFCC 1(2) and the CSU ASM 275102.
(a) If there is a circuit/interface fault, do the repair.
(b) Move the flaps AMM 27-50-00-866-008 and AMM 27-50-00-866-009.
(c) Get access to the FLP ON GROUND FAULTS page and make sure the fault does not continue.
5. Close-up(1) Set MENU MODE and go to the sub-MENU, SYSTEM DATA FLAPS.
(a) Push the line key 3L, (DICRETE INPUTS).
(b) The named SFCC trasmits the DISCRETE INPUTS page (this page is transmitted every 5 seconds).
(c) Set the flap/slat control lever (CSU LEVER) to each flap/slat position.
(d) Compare the CSU switch banks A and B:
(e) If a difference is found, (reference table 1 page block 301).
(f) Replace the defective CSU [51CV] AMM 27-51-17-000-001 and AMM 27-51-17-400-001.
(g) If no difference is found, do the next step.
(2) Swap SFCC 1 with SFCC 2
AMM 27-51-34-000-001 and AMM 27-51-34-400-001.
(a) If the fault moves to the other SFCC:
1 Swap back the serviceable SFCC.
2 Replace SLAT/FLAP CONTR.COMP. [21CV] or SLAT/FLAP CONTR.COMP. [22CV] that shows the fault.
(b) If the fault does not move to the other SFCC:
- Swap back the SFCCs.
(a) Examine the ECAM EWD and the SD FLT/CTL page and make sure that the ECAM WARNING goes out of view.
(b) If the ECAM WARNING goes out of view, get access to the FLP ON GROUND FAULTS page and do a check of the ground log.
(4) If the fault continues, do a check of the aircraft wiring between the SFCC 1(2) and the CSU ASM 275102.
(a) If there is a circuit/interface fault, do the repair.
(b) Move the flaps AMM 27-50-00-866-008 and AMM 27-50-00-866-009.
(c) Get access to the FLP ON GROUND FAULTS page and make sure the fault does not continue.
Subtask 27-51-00-942-060-A
A. Remove the ground support and maintenance equipment, the special and standard tools and all other items.
Subtask 27-51-00-860-061-A B. Put the aircraft back to its initial configuration.