Loss of Signal on the Left Pedals for the ELAC 2

TASK 27-93-00-810-813-A
Loss of Signal on the Left Pedals for the ELAC 2

1. Possible Causes

ELAC-2 [2CE2]
XDCR UNIT-PEDAL POS, L [25CE1]
wiring from the ELAC 2 (2CE2) to the transducer unit (25CE1)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 27-24-00-710-001	Operational Test of the Rudder Hydraulic Actuation
AMM 27-92-15-000-001	Removal of the Pedal Position Transducer Unit
AMM 27-92-15-400-001	Installation of the Pedal Position Transducer Unit
ASM 279223
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 27-93-00-700-074-A

A. Test
(1) Do the operational test of the rudder hydraulic actuation AMM 27-24-00-710-001.
(2) Do the BITE test of the EFCS (Ground Scanning) AMM 27-96-00-740-001.

4. Fault Isolation
Subtask 27-93-00-810-062-A

A. If the BITE test gives the maintenance message:
ELAC2 OR INPUT OF L PEDALS XDCR UNIT 25CE1

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

(1) If the fault continues:

replace the XDCR UNIT-PEDAL POS, L [25CE1] , AMM 27-92-15-000-001 and AMM 27-92-15-400-001.

(2) If the fault continues:

do a check and repair the wiring from the ELAC 2 (2CE2) to the transducer unit (25CE1), ASM 279223.

Subtask 27-93-00-700-075-A

B. Do the operational test and the BITE test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:56 UTC