Loss of the Side Stick Priority Signal for One ELAC

TASK 27-93-00-810-919-A
Loss of the Side Stick Priority Signal for One ELAC

1. Possible Causes

ELAC-1 [2CE1]
wiring of the STICK PRIORITY CAPT (DSI35) and STICK PRIORITY F/O (DSI36) signals
ELAC-2 [2CE2]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 27-92-00-810-830-A	Loss of the Side Stick Priority Signal
ASM 279217
AMM 27-93-34-000-001	Removal of the ELAC
AMM 27-93-34-400-001	Installation of the ELAC
AMM 27-96-00-710-003	Operational Test of the Side Stick Priority
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-93-00-700-156-A

A. Test
(1) Do a check of the Post Flight Report (PFR):
(a) If the F/CTL maintenance status is shown with the ECAM warning message F/CTL SIDE STICK PRIORITY, refer to the trouble shooting procedure "Loss of the Side Stick Priority Signal" (Ref. TSM TASK 27-92-00-810-830).
(b) If the ECAM warning message F/CTL SIDE STICK PRIORITY only is shown:
1. Do the operational test of the side stick priority AMM 27-96-00-710-003.
2. Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.

NOTE: If the ECAM warning message F/CTL ELAC 1 FAULT or F/CTL ELAC 2 FAULT is shown on the PFR after the ECAM warning message F/CTL SIDE STICK PRIORITY, ignore the ECAM warning message F/CTL ELAC 1 FAULT or F/CTL ELAC 2 FAULT. It was generated by the reset of ELAC 1 or ELAC 2 computer done during an operational procedure (FCOM) related to the ECAM warning message F/CTL SIDE STICK PRIORITY.

4. Fault Isolation
Subtask 27-93-00-810-167-A

A. If the tests give the maintenance message CHECK PRIORITY WIRING:

do the tests given in Para. 3. with only the ELAC1 engaged for the operational test of the side stick priority.

(1) If the tests give the above maintenance message again:

replace the ELAC-1 [2CE1] AMM 27-93-34-000-001 and AMM 27-93-34-400-001.

(a) If the fault continues:

do a check and repair the wiring of the STICK PRIORITY CAPT (DSI35) and STICK PRIORITY F/O (DSI36) signals from the ELAC1 (2CE1) COM part and MON part to the first terminal block ASM 279217.

(2) If the tests do not give a maintenance message:

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

(a) If the fault continues:

do a check and repair the wiring of the STICK PRIORITY CAPT (DSI35) and STICK PRIORITY F/O (DSI36) signals from the ELAC2 (2CE2) COM part and MON part to the first terminal block ASM 279217.

Subtask 27-93-00-700-157-A

B. Do the tests given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:06 UTC