Loss of the Signal of the Right Yellow Elevator-Servocontrol Position- Transducer by the ELAC 2

TASK 27-93-00-810-877-A
Loss of the Signal of the Right Yellow Elevator-Servocontrol Position- Transducer by the ELAC 2

1. Possible Causes

ELAC-2 [2CE2]
wiring of the POS XDCR COM (ANI 2-2) signal from the ELAC 2 (2CE2) to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 27-90-00-810-814-A	Loss of the ACS1 Signal of the ELAC2 COM Side
TSM TASK 27-90-00-810-815-A	Loss of the ACS1 Signal of the ELAC2 MON Side
TSM TASK 27-90-00-810-816-A	Loss of the ACS1 of the ELAC2 COM and MON Sides
ASM 279308
AMM 27-93-34-000-001	Removal of the ELAC
AMM 27-93-34-400-001	Installation of the ELAC
AMM 27-96-00-710-020	Operational Test of the Side Stick Assembly (Activation for the BITE Test)
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-93-00-700-136-A

A. Test
(1) Do the operational test of the side stick assembly (activation for the BITE test) AMM 27-96-00-710-020.
(2) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.
(a) If the ground scanning gives the maintenance message:
ELAC2 OR WIRING FROM R Y ELEV POS XDCR 34CE2

refer to Para. Fault Isolation.

(b) If the ground scanning gives at least two maintenance messages of the two lists below:
First list:

ELAC2 COM OR INPUT OF THS ACTR XDCR1 9CE
ELAC2 OR WIRING FROM L G ELEV POS XDCR 34CE1
ELAC2 OR WIRING FROM R Y ELEV POS XDCR 34CE2
Second list:
ELAC2 MON OR INPUT OF THS ACTR XDCR1 9CE
ELAC2 OR WIRING FROM L ELEV POS MON XDCR
ELAC2 OR WIRING FROM R ELEV POS MON XDCR
ELAC2 OR WIRING FROM L B ELEV MODE XDCR 34CE3
ELAC2 OR WIRING FROM R Y ELEV MODE XDCR 34CE4

1 First case:
Combination of maintenance messages of the first list, do this trouble shooting procedure (Ref. TSM TASK 27-90-00-810-814).
2 Second case:
Combination of maintenance messages of the second list, do this trouble shooting procedure (Ref. TSM TASK 27-90-00-810-815).
3 Third case:
Combination of maintenance messages of the first and second lists, do this trouble shooting procedure (Ref. TSM TASK 27-90-00-810-816).

4. Fault Isolation
Subtask 27-93-00-810-123-A

A. If the test gives the maintenance message:
ELAC2 OR WIRING FROM R Y ELEV POS XDCR 34CE2

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

(1) If the fault continues:

Do a check and repair the wiring of the POS XDCR COM (ANI 2-2) signal from the ELAC 2 (2CE2) to the first terminal block ASM 279308.

Subtask 27-93-00-700-137-A

B. Do the tests given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:00 UTC