Operational Test of the Engine Interface Unit (with CFDS) [CFML]

TASK 73-25-34-710-805-A
Operational Test of the Engine Interface Unit (with CFDS)

1. Reason for the Job
Use this test to do a check of the Engine Interface Unit (EIU) operation.
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-32-00-860-012-A	Procedure to Get Access to the SYSTEM REPORT/TEST/ENG Page

3. Job Set-up
Subtask 73-25-34-861-066-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 73-25-34-865-093-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R40
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	R41

Subtask 73-25-34-860-108-A

C. Aircraft Maintenance Configuration
(1) On the ENG section of maintenance panel 50VU:
(a) Release the FADEC GND PWR 1(2) pushbutton switch (the ON legend comes on).

NOTE: After the FADEC is energized, wait ten seconds before you start the test. If you do not wait ten seconds, the interactive mode will stop the EEC self-test and this can cause a spurious fault.

4. Procedure
Subtask 73-25-34-710-067-A

A. Operational Test of the EIU
(1) Do this test.

NOTE: This test is for system 1. For system 2, use the indication between parentheses.

(2) On the left or right MCDU, get the SYSTEM REPORT/TEST ENG page (Ref. AMM TASK 31-32-00-860-012).

ACTION	RESULT
1.Push the line key adjacent to the EIU1(EIU2) indication.	The EIU1(EIU2) menu comes into view.
2.Push the line key adjacent to the TESTS indication.	On the MENU page, the TEST menu comes into view.
3.Push the line key adjacent to the SYSTEM TEST indication.	The TEST IN PROGRESS page comes into view. After five seconds: If there is no failure, the TEST OK page comes into view. If there are failures, the first page of test failures comes into view.
4.Push the line key adjacent to the RETURN indication until the CFDS menu comes into view.	The CFDS menu comes into view.
5.Stop the MCDU.

5. Close-up
Subtask 73-25-34-860-109-A

A. Put the aircraft back to its initial configuration.
(1) On the ENG section of maintenance panel 50VU:
(a) Push the FADEC GND PWR 1(2) pushbutton switch (the ON legend goes off).

Subtask 73-25-34-862-064-A

B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 12:58:12 UTC