Loss of the Pitch Change Over Signal by the ELAC 2

TASK 27-93-00-810-930-A
Loss of the Pitch Change Over Signal by the ELAC 2

1. Possible Causes

ELAC-2 [2CE2]
wiring of the PITCH AXIS OK (DSO 01) signal from the ELAC 2 COM part to the MON part (DSI 29)
wiring of the PITCH AXIS OK (DSO 09) signal from the ELAC 2 COM part to the MON part (DSI 12)
wiring of the PITCH AXIS OK (DSO 01) signal from the ELAC 2 MON part to the COM part (DSI 29)
wiring of the PITCH AXIS OK (DSO 09) signal from the ELAC 2 MON part to the COM part (DSI 12)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 31-32-00-810-932-A	Failure of the Discrete Links
ASM 279232
AMM 27-93-34-000-001	Removal of the ELAC
AMM 27-93-34-400-001	Installation of the ELAC
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-93-00-740-184-A

A. Test
(1) Check the PN of the FCDCs fitted on the aircraft:
(a) If the PN of the FCDCs is 115370-0105, you cannot confirm the fault, do the fault isolation.
(b) If the PN of the FCDCs is different from 115370-0105, do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.

4. Fault Isolation
Subtask 27-93-00-810-179-A

A. If you cannot confirm the fault (FCDC PN 115370-0105) or if the BITE test gives the maintenance message CHECK PITCH CHANGE OVER WIRING OF ELAC2:

replace the ELAC-2 [2CE2] AMM 27-93-34-000-001 and AMM 27-93-34-400-001.

(1) If the fault continues:
(a) Do the trouble shooting procedure (Ref. TSM TASK 31-32-00-810-932) related to the:

PITCH AXIS OK (DSO 01) signal ELAC 2 COM part ASM 279232
PITCH AXIS OK (DSO 09) signal ELAC 2 COM part ASM 279232
PITCH AXIS OK (DSO 01) signal ELAC 2 MON part ASM 279232
PITCH AXIS OK (DSO 09) signal ELAC 2 MON part ASM 279232

(2) If the fault continues:
(a) Do a check of the wiring of the PITCH AXIS OK (DSO 01) signal from the ELAC 2 COM part to the MON part (DSI 29) ASM 279232.

if there is continuity, see Para. (b)
if there is no continuity, repair the above wiring.

(b) Do a check of the wiring of the PITCH AXIS OK (DSO 09) signal from the ELAC 2 COM part to the MON part (DSI 12) ASM 279232.

if there is continuity, see Para. (c)
if there is no continuity, repair the above wiring.

(c) Do a check of the wiring of the PITCH AXIS OK (DSO 01) signal from the ELAC 2 MON part to the COM part (DSI 29) ASM 279232.

if there is continuity, see Para. (d)
if there is no continuity, repair the above wiring.

(d) Do a check and repair the wiring of the PITCH AXIS OK (DSO 09) signal from the ELAC 2 MON part to the COM part (DSI 12) ASM 279232.

Subtask 27-93-00-740-185-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:07 UTC