Check the Engine Interface Unit (EIU) Internal Memory [CFML]

TASK 73-25-34-860-813-A
Check the Engine Interface Unit (EIU) Internal Memory

1. Reason for the Job
EIU internal memory needs to be checked to know if the configuration considered by EIU is the configuration of the aircraft.
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 31-36-00-740-008-A	Access to the Parameter Call-Up Menus

3. Job Set-up
Subtask 73-25-34-941-055-A

A. Aircraft Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch is in the OFF position.

Subtask 73-25-34-865-123-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
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/ENG2/FADEC B/AND EIU2	4KS2	R41

4. Procedure
Subtask 73-25-34-869-050-A

A. Check of the configuration memorized in EIU internal memory.
(1) If you have to do a check of the EIU 1 internal configuration, do as follows:

NOTE: The actions and results of this procedure occur on Multipurpose Control & Display Unit (MCDU) you use.

(a) On EIU 1 output bus, check:

ACTION	DEFINITION	RESULT	CONFIGURATION
1. On the center pedestal, on the SWITCHING panel 8VU, make sure that the Electronic Instrument System (EIS) Display Management Computer (DMC) selector-switch is set to NORM.
2. Get access to the parameter call-up menus refer to (Ref. AMM TASK 31-36-00-740-008) and enter the following parameter label call-up command:		On MCDU:
07B/1/032/01	HPP ENG1	Make sure that the 7th bit starting from the right is at 1	1 = Engine 1 selected 0 = Engine 1 not selected
07B/1/032/01	HPP ENG2	Make sure that the 8th bit starting from the right is at 0	1 = Engine 2 selected 0 = Engine 2 not selected
07B/1/032/01	HPP CFM	Make sure that the 9th bit starting from the right is at 1	1 = CFM engines selected 0 = CFM engines not selected
07B/1/032/01	HPP PW	Make sure that the 18th bit starting from the right is at 0	1 = PW engines selected 0 = PW engines not selected

(b) If one of the previous check is not passed, perform a ground scanning of EIU and do the troubleshooting of the failures reported.
(2) If you have to do a check of the EIU 2 internal configuration, do as follows:

NOTE: The actions and results of this procedure occur on MCDU you use.

(a) On EIU 2 output bus, check:

ACTION	DEFINITION	RESULT	CONFIGURATION
1. On the center pedestal, on the SWITCHING panel 8VU, make sure that the EIS DMC selector-switch is set to NORM
2. Get access to the parameter call-up menus refer to (Ref. AMM TASK 31-36-00-740-008) and enter the following parameter label call-up command:		On MCDU:
07B/2/032/10	HPP ENG1	Make sure that the 7th bit starting from the right is at 0	1 = Engine 1 selected 0 = Engine 1 not selected
07B/2/032/10	HPP ENG2	Make sure that the 8th bit starting from the right is at 1	1 = Engine 2 selected 0 = Engine 2 not selected
07B/2/032/10	HPP CFM	Make sure that the 9th bit starting from the right is at 1	1 = CFM engines selected 0 = CFM engines not selected
07B/2/032/10	HPP PW	Make sure that the 18th bit starting from the right is at 0	1 = PW engines selected 0 = PW engines not selected

(b) If one of the previous check is not passed, perform a ground scanning of EIU and do the troubleshooting of the failures reported.

5. Close-up
Subtask 73-25-34-942-060-A

A. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 13:07:29 UTC