Slats - Slats Locked at Aircraft Power-Up

TASK 27-81-00-810-834-A
Slats - Slats Locked at Aircraft Power-Up

1. Possible Causes

SLAT/FLAP CONTR.COMP. [21CV]
SLAT/FLAP CONTR.COMP. [22CV]

2. Job Set-up Information
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 27-80-00-869-004	Reset of the Wing Tip Brake (WTB) of the Slat System on the Ground
AMM 27-81-00-740-002	BITE Test of the Slat and Flap Control Computers (Slat System)

3. Fault Confirmation
Subtask 27-81-00-710-065-A ** ON A/C NOT FOR ALL

A. Not Applicable

4. Fault Isolation
Subtask 27-81-00-810-083-A ** ON A/C NOT FOR ALL

A. Procedure
(1) Do a reset of the WTBs of the Slat System AMM 27-80-00-869-004.
(2) If you start the APU with the batteries it is possible that the ECAM warning "F/CTL SLATS LOCKED" is shown.

NOTE: The ECAM warning "F/CTL FLAPS LOCKED" can also show.

(a) Refer to the TFU 27-51-34-026 and do a check of the SFCC part numbers and serial numbers.
(b) If applicable, replace the related SFCC SLAT/FLAP CONTR.COMP. [21CV] or SLAT/FLAP CONTR.COMP. [22CV] ,
AMM 27-51-34-000-001 and AMM 27-51-34-400-001.
(3) If step (2) is not applicable, do a BITE test of SFCC 1 and 2 AMM 27-81-00-740-002:
(a) If you get a 'NO RESPONSE' message when you select the SFCC menu or if the menu cannot load, replace the related SFCC.

Do a check of the part number for the removed SFCC.
If the part number is 49-170-11, write the applicable information on the repair tag: NO RESPONSE via MCDU or SFCC MENU CANNOT LOAD.

NOTE: This information is important for the repair shop to do the repair (as given in BAE System vSIL 067).

(b) If the test gives a fault message, do the trouble shooting procedure related to this message.

[Rev.8 from Aug 2018] 2026.04.04 04:27:50 UTC