Slat Position Indication Disagree

TASK 27-81-00-810-827-A
Slat Position Indication Disagree

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 27-54-51-000-001	Removal of the Power Control Unit of the Flap System
AMM 27-54-51-400-001	Installation of the Power Control Unit of the Flap System
ASM 278501
AMM 27-85-11-000-001	Removal of the Instrumentation Position Pick-Off Unit
AMM 27-85-11-400-001	Installation of the Instrumentation Position Pick-Off Unit
AMM 31-53-34-000-001	Removal of the Flight Warning Computer (FWC)
AMM 31-53-34-400-001	Installation of the Flight Warning Computer (FWC)

3. Fault Confirmation
Subtask 27-81-00-710-060-A

A. Make sure of the apparently incorrect Slat/Flap position indications on the ECAM display.

4. Fault Isolation
Subtask 27-81-00-810-076-A

A. If the apparently incorrect Slat/Flap position indications show on the ECAM display.

(1) If the fault does not continue:

(a) If the fault continues:

1 If the fault does not continue:

2 If the fault continues:

a If the voltage is correct:

Do a check and repair the aircraft wiring from IPPU (4CN) A/C,D,E to the FWC 1 1 (1WW1) AA/13G,13H,13J
Do a check and repair the aircraft wiring from IPPU (4CN) B/C,D,E to the FWC 2 (1WW2) AD/13A,13B,13C ASM 278501.

b If the voltage is not correct:

Do a check and repair the aircraft wiring from IPPU (4CN) A/A,B to the circuit breaker (1CN) and the ground
Do a check and repair the aircraft wiring from IPPU (4CN) B/A,B to the circuit breaker (2CN) and the ground ASM 278501.

(2) If the fault continues:

(a) If the fault does not continue:

Replace the FWC-1 [1WW1] and FWC-2 [1WW2] AMM 31-53-34-000-001 and AMM 31-53-34-400-001.
Reset the circuit breaker of FWC 1 (1CN) and FWC 2 (2CN).

1 If the fault continues:

(b) If the fault continues:

[Rev.8 from Aug 2018] 2026.04.04 04:27:49 UTC