Disagree between the Emergency Power Supply Discretes on the ELAC1 or ELAC2 or SEC1

TASK 27-93-00-810-920-A
Disagree between the Emergency Power Supply Discretes on the ELAC1 or ELAC2 or SEC1

1. Possible Causes

ELAC-1 [2CE1]
wiring of the LOSS OF NORMAL SPLY ON 2PP (DSI53) signal
SEC-1 [1CE1]
wiring of the SEC1 IN EMERGENCY PWR SPLY (DSI3) signal
ELAC-2 [2CE2]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 27-96-00-810-801-A	Result of the Operational Test of the Logics that Activates the ELAC 1&2 and SEC 1 STBY PWR SPLY not Satisfactory
ASM 279202
AMM 27-93-34-000-001	Removal of the ELAC
AMM 27-93-34-400-001	Installation of the ELAC
AMM 27-94-34-000-001	Removal of the SEC
AMM 27-94-34-400-001	Installation of the SEC
AMM 27-96-00-710-018	Operational Test of Logics Activating ELAC 1&2, & SEC 1 STBY PWR SPLY & Ability of SEC 1&2 to Achieve Pitch CTL & Ability of Sidestick Priority Function
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)
AMM 29-24-00-863-001	Pressurize the Yellow Hydraulic System with the Electric Pump
AMM 29-24-00-864-001	Depressurize the Yellow Hydraulic System

3. Fault Confirmation
Subtask 27-93-00-860-078-A

A. Job Set-up
(1) Pressurize the Yellow hydraulic system AMM 29-24-00-863-001.

Subtask 27-93-00-865-050-A

B. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	FLIGHT CONTROLS/THS ACTR/MOT1	19CE1	Q16
121VU	FLIGHT CONTROLS/ELAC2/NORM/SPLY	15CE2	R20

Subtask 27-93-00-700-160-A

C. Test
(1) Open the circuit breakers FLT CTL/ELAC2/NORM/SPLY (15CE2) and FLT CTL/THS ACTR/MOT1 (19CE1).
(2) Do the BITE test of the EFCS (Ground Scanning) AMM 27-96-00-740-001.
(a) If the test confirms the fault:

Go to Para. 4. Fault Isolation.

(b) If the test does not confirm the fault:
1 Do the operational test AMM 27-96-00-710-018.
2 If the test gives a fault, do the trouble shooting procedure (Ref. TSM TASK 27-96-00-810-801).

4. Fault Isolation
Subtask 27-93-00-810-173-A

A. If the BITE test gives the maintenance message EMER DISCRETE DISAGREE:

Do the test given in Para. 3. with the ELAC1 engaged only.

(1) If the test gives the above maintenance message again:
(a) Replace the ELAC-1 [2CE1] AMM 27-93-34-000-001 and AMM 27-93-34-400-001.
(b) If the fault continues:

Do a check and repair the wiring of the LOSS OF NORMAL SPLY ON 2PP (DSI53) signal from the ELAC1 (2CE1) COM part and MON part to the first terminal block ASM 279202.

(2) If the test does not give a maintenance message:

Do the test given in Para. 3. with the SEC1 engaged only.

(a) If the test gives the above maintenance message again :
1 Replace the SEC-1 [1CE1] AMM 27-94-34-000-001 and AMM 27-94-34-400-001.
2 If the fault continues:

Do a check and repair the wiring of the SEC1 IN EMERGENCY PWR SPLY (DSI3) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279202.

(b) If the test does not give a maintenance message:

Do the test given in Para. 3. with the ELAC2 engaged only.

1 If the test gives the above maintenance message again :
a Replace the ELAC-2 [2CE2] AMM 27-93-34-000-001 and AMM 27-93-34-400-001.
b If the fault continues:

Do a check and repair the wiring of the LOSS OF NORMAL SPLY ON 2PP (DSI53) signal from the ELAC2 (2CE2) COM part and MON part to the first terminal block ASM 279202.

2 If the test does not give a maintenance message:
a Do the operational test AMM 27-96-00-710-018.
b If the test gives a fault, do the trouble shooting procedure (Ref. TSM TASK 27-96-00-810-801).

Subtask 27-93-00-700-161-A

B. Do the test given in Para. 3.

5. Close-up
Subtask 27-93-00-860-079-A

A. Put the aircraft back to its initial configuration.
(1) Depressurize the Yellow hydraulic system AMM 29-24-00-864-001.
(2) Close the circuit breakers FLT CTL/ELAC2/NORM/SPLY (15CE2) and FLT CTL/THS ACTR/MOT1 (19CE1).

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