Loss of the Blue Hydraulic Pressure Transducer Signal for the ELAC 1

TASK 27-93-00-810-821-A
Loss of the Blue Hydraulic Pressure Transducer Signal for the ELAC 1

1. Possible Causes

ELAC-1 [2CE1]
wiring of the ANI 4-3 signal from the ELAC 1 (2CE1) COM and MON parts to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 279228
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)
AMM 29-10-00-863-003	Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
AMM 29-10-00-864-003	Depressurize the Blue Hydraulic System

3. Fault Confirmation
Subtask 27-93-00-860-054-A

A. Job Set-Up
(1) Pressurize the Blue hydraulic system with the electric pump AMM 29-10-00-863-003.

Subtask 27-93-00-740-062-A

B. Test
(1) Do the BITE test of the EFCS (Ground Scanning) AMM 27-96-00-740-001.
(a) If the test gives a maintenance message, do the step 4. Fault Isolation.
(b) If there is no maintenance message:
1 No other maintenance action is necessary.
2 If the fault history report shows that the same failure occurred more than three times, replace the ELAC-1 [2CE1] .

4. Fault Isolation
Subtask 27-93-00-810-070-B

A. If the BITE test gives the maintenance message:
ELAC1 OR WIRING FROM B HYD PRESS XMTR 2065GN

replace the ELAC-1 [2CE1] , 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 ANI 4-3 signal from the ELAC 1 (2CE1) COM and MON parts to the first terminal block, ASM 279228.

Subtask 27-93-00-740-063-A

B. Do the test given in Para. 3.

5. Close-up
Subtask 27-93-00-860-055-A

A. Depressurize the Blue hydraulic system AMM 29-10-00-864-003.

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