DOC AIRBUS | TSM A320FSFCC 1 No LGCIU 1 Data or SFCC 2 No LGCIU 2 Data
TASK 27-51-00-810-831-A
SFCC 1 No LGCIU 1 Data or SFCC 2 No LGCIU 2 Data
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 27-51-00-740-063-A
Subtask 27-51-00-810-082-A
Subtask 27-51-00-860-073-A
[Rev.8 from Aug 2018]
2026.04.04 04:39:14 UTC
SFCC 1 No LGCIU 1 Data or SFCC 2 No LGCIU 2 Data
1. Possible Causes
- LGCIU-1 [5GA1]
- LGCIU-2 [5GA2]
- SLAT/FLAP CONTR.COMP. [21CV]
- SLAT/FLAP CONTR.COMP. [22CV]
aircraft wiring between the LGCIU 1 ARINC connector and the SFCC 1 (2) ARINC electrical connecter.
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 27-51-34-000-001 | Removal of the SFCC |
| AMM 27-51-34-400-001 | Installation of the SFCC |
| AMM 32-31-71-000-001 | Removal of the LGCIU |
| AMM 32-31-71-400-001 | Installation of the LGCIU |
| AWM 326105 | |
| AWM 326106 |
Subtask 27-51-00-740-063-A
A. Message Analysis.
(1) Access the submenu page "SYSTEM DATA FLAP" and press the line key "2L".
(a) The page shown is the "ARINC 429 INPUT STATUS" and is refreshed every 5 seconds.
(2) If the ARINC INPUT STATUS page shows LGCIU 1 (2) OK.
(a) Do the SFCC 1 (2) Reset and Initialization.
Subtask 27-51-00-865-073-A (1) Access the submenu page "SYSTEM DATA FLAP" and press the line key "2L".
(a) The page shown is the "ARINC 429 INPUT STATUS" and is refreshed every 5 seconds.
NOTE: Refer to page block 301 for example of FLAP ARINC INPUT STATUS page.
(b) If the ARINC INPUT STATUS page shows LGCIU LABEL *** NO DATA, do the fault isolation. (2) If the ARINC INPUT STATUS page shows LGCIU 1 (2) OK.
(a) Do the SFCC 1 (2) Reset and Initialization.
B. Table of the circuit breakers used in this procedure:
4. Fault Isolation| 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 |
Subtask 27-51-00-810-082-A
A. SFCC 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
(d) Check the UPPER ECAM and the SD FLT/CTL page for the fault warnings.
(e) If the ECAM warning clears, access the FLP ON GROUND FAULTS page and make sure that the ground log is clear.
(f) If the checks at Para.4.A.(1)(e) are satisfactory there is no further maintenance action.
Subtask 27-51-00-810-080-A (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
(d) Check the UPPER ECAM and the SD FLT/CTL page for the fault warnings.
(e) If the ECAM warning clears, access the FLP ON GROUND FAULTS page and make sure that the ground log is clear.
(f) If the checks at Para.4.A.(1)(e) are satisfactory there is no further maintenance action.
B. Procedure
(1) Swap the LGCIU 1 with LGCIU 2 AMM 32-31-71-000-001 AMM 32-31-71-400-001.
(2) Access the submenu page "SYSTEM DATA FLAP" and press the line key "2L".
(a) The page shown is the "ARINC 429 INPUT STATUS" and is refreshed every 5 seconds.
(b) If the ARINC INPUT STATUS page shows "LGCIU 1 (2) OK",then the initial LGCIU 1 (2) is at fault.
(3) Install the LGCIU 1 and 2 in their initial locations and replace the unserviceable LGCIU-1 [5GA1] LGCIU-2 [5GA2] . Refer to Para. 4.B.(1).
(4) Go to the submenu page "SYSTEM DATA FLAP" and access the "ARINC 429 INPUT STATUS"page.
(a) If the fault remains in the SFCC 1 (2) the fault is in the SFCC 1 (2) interface/circuit.
(5) Swap the SFCC 1 (2) with SFCC 2 (1) AMM 27-51-34-000-001 AMM 27-51-34-400-001.
(6) Go to the submenu page "SYSTEM DATA FLAP" and access the "ARINC 429 INPUT STATUS"page, SFCC 1 and then SFCC 2.
(a) If the fault moves with the SFCC 1 (2) to the SFCC 2 (1) position, the fault is in the SFCC 1 (2) input interface.
(7) Instal the SFCC 1 and 2 in their initial locations and replace the unserviceable SLAT/FLAP CONTR.COMP. [21CV] SLAT/FLAP CONTR.COMP. [22CV] Refer to Para. 4.A.(3).
(a) Do Para. 4.A.(6). If the fault remains in the SFCC 1 (2) interface/circuit.
(8) Do a check of theaircraft wiring between the LGCIU 1 ARINC connector and the SFCC 1 (2) ARINC electrical connecter. AWM 326105 AWM 326106.
(9) If there is a fault repair the wiring/interface.
(10) Do the BITE test as in Para. 3.A.(2) and Para. 3.A.(4).
(a) Set the MCDU to MENU MODE and access the FLAP ON GROUND FAULTS page and make sure that the ground log is clear.
5. Close-up(1) Swap the LGCIU 1 with LGCIU 2 AMM 32-31-71-000-001 AMM 32-31-71-400-001.
(2) Access the submenu page "SYSTEM DATA FLAP" and press the line key "2L".
(a) The page shown is the "ARINC 429 INPUT STATUS" and is refreshed every 5 seconds.
(b) If the ARINC INPUT STATUS page shows "LGCIU 1 (2) OK",then the initial LGCIU 1 (2) is at fault.
(3) Install the LGCIU 1 and 2 in their initial locations and replace the unserviceable LGCIU-1 [5GA1] LGCIU-2 [5GA2] . Refer to Para. 4.B.(1).
(4) Go to the submenu page "SYSTEM DATA FLAP" and access the "ARINC 429 INPUT STATUS"page.
(a) If the fault remains in the SFCC 1 (2) the fault is in the SFCC 1 (2) interface/circuit.
(5) Swap the SFCC 1 (2) with SFCC 2 (1) AMM 27-51-34-000-001 AMM 27-51-34-400-001.
(6) Go to the submenu page "SYSTEM DATA FLAP" and access the "ARINC 429 INPUT STATUS"page, SFCC 1 and then SFCC 2.
(a) If the fault moves with the SFCC 1 (2) to the SFCC 2 (1) position, the fault is in the SFCC 1 (2) input interface.
(7) Instal the SFCC 1 and 2 in their initial locations and replace the unserviceable SLAT/FLAP CONTR.COMP. [21CV] SLAT/FLAP CONTR.COMP. [22CV] Refer to Para. 4.A.(3).
(a) Do Para. 4.A.(6). If the fault remains in the SFCC 1 (2) interface/circuit.
(8) Do a check of the
(9) If there is a fault repair the wiring/interface.
(10) Do the BITE test as in Para. 3.A.(2) and Para. 3.A.(4).
(a) Set the MCDU to MENU MODE and access the FLAP ON GROUND FAULTS page and make sure that the ground log is clear.
Subtask 27-51-00-860-073-A
A. Put the aircraft back to its initial configuration.