DOC AIRBUS | AMM A320FTest No.7 - EEC Operation Test (Self Test) [PW11]
TASK 73-21-00-710-806-A
Test No.7 - EEC Operation Test (Self Test)
Use this procedure to check for satisfactory operation of the Full Authority Digital Engine Controls (FADEC) system before you start the engine.
Use this procedure to verify the presence of existing faults and to confirm that a corrective action has eliminated the fault.
The Engine Electronic Control (EEC) system interactive test electrically verifies EEC and Prognostics and Health Management Unit (PHMU) input and output circuits.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 73-21-00-860-068-A ** ON A/C NOT FOR ALL
Subtask 73-21-00-710-053-A ** ON A/C NOT FOR ALL
Subtask 73-21-00-860-070-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:02:31 UTC
Test No.7 - EEC Operation Test (Self Test)
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobUse this procedure to check for satisfactory operation of the Full Authority Digital Engine Controls (FADEC) system before you start the engine.
Use this procedure to verify the presence of existing faults and to confirm that a corrective action has eliminated the fault.
The Engine Electronic Control (EEC) system interactive test electrically verifies EEC and Prognostics and Health Management Unit (PHMU) input and output circuits.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | COVER - PROTECTION |
| No specific | AR | WARNING NOTICE(S) |
| 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 |
MCDU PagesSubtask 73-21-00-860-068-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 73-21-00-865-056-A ** ON A/C NOT FOR ALL (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
B. Make sure that this(these) circuit breaker(s) is(are) closed:
Subtask 73-21-00-860-069-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | ENGINE/1 AND 2/IGN/SYS A | 1JH | A03 |
| FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1) | |||
| 49VU | ENGINE/1/FADEC A/AND EIU 1 | 2KS1 | A04 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG1/FADEC B/AND EIU 1 | 4KS1 | R41 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/IGN/ENG1/SYS B | 3JH1 | P41 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG1/FADEC B/AND EIU 1 | 4KS1 | R40 |
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2) | |||
| 49VU | ENGINE/2/FADEC A/AND EIU 2 | 2KS2 | A05 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG2/FADEC B/AND EIU2 | 4KS2 | Q40 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/IGN/ENG2/SYS B | 3JH2 | P42 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG2/FADEC B/AND EIU2 | 4KS2 | R41 |
C. Preparation for the Test
(1) 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 was in the OFF position not less than five minutes before you do the test.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(2) On the ENG section of maintenance panel 50VU:
(a) Release the FADEC GND PWR/1(2) pushbutton switch (the ON legend comes on).
(a) Make sure that the APU BLEED pushbutton switch is released (ON legend off).
(b) Put a WARNING NOTICE(S) in position to tell the persons not to use it.
(4) Put a WARNING NOTICE(S) in position on the High Pressure (HP) ground connector to tell persons not to pressurize the pneumatic system.
(5) On the left or right MCDU, get the SYSTEM REPORT/TEST/ENG page (Ref. AMM TASK 31-32-00-860-012).
4. Procedure(1) 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 was in the OFF position not less than five minutes before you do the test.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(2) 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 stops the EEC self-test and this can cause spurious faults.
(3) On AIR COND panel 30VU: (a) Make sure that the APU BLEED pushbutton switch is released (ON legend off).
(b) Put a WARNING NOTICE(S) in position to tell the persons not to use it.
(4) Put a WARNING NOTICE(S) in position on the High Pressure (HP) ground connector to tell persons not to pressurize the pneumatic system.
(5) On the left or right MCDU, get the SYSTEM REPORT/TEST/ENG page (Ref. AMM TASK 31-32-00-860-012).
Subtask 73-21-00-710-053-A ** ON A/C NOT FOR ALL
A. Test
(1) Make sure that you remove and install protection covers as necessary to prevent damage to the engine.
(a) Make sure that you wipe clean all parts and tools as necessary to remove debris and prevent damage to the engine.
(2) On the panel 115VU:
(a) Set the ENG/MASTER switch (ENG 1) or (ENG 2) to the OFF position.
(b) Set the ENG/MODE rotary selector switch to NORM.
(3) On the panel 50VU:
(a) Set the ENG FADEC GWD PWR switch (1) or (2) to the ON positions.
(4) Perform the EEC SYSTEM TEST as follows:
(5) Make a record of the fault messages that you see on the MCDU screen.
Table 1 - Nuisance Fault - Interactive Mode
(6) Use the record of fault messages to do the maintenance that is necessary.
(7) Examine the assembly for foreign objects, damage, and correct assembly.
(8) Make sure that you install COVER - PROTECTION as necessary to prevent damage to the engine.
5. Close-up(1) Make sure that you remove and install protection covers as necessary to prevent damage to the engine.
(a) Make sure that you wipe clean all parts and tools as necessary to remove debris and prevent damage to the engine.
(2) On the panel 115VU:
(a) Set the ENG/MASTER switch (ENG 1) or (ENG 2) to the OFF position.
(b) Set the ENG/MODE rotary selector switch to NORM.
(3) On the panel 50VU:
(a) Set the ENG FADEC GWD PWR switch (1) or (2) to the ON positions.
(4) Perform the EEC SYSTEM TEST as follows:
| ACTION | RESULT |
|---|---|
| On the MCDU: | |
| 1.Push FADEC indication key Push the EEC 1(2) channel A key. Push the system test key. Select EEC system self test. | The EEC 1 (2) Channel A page comes into view. The system test page comes into view. |
| 2.Push the start test key. |
|
| 3.Make a record of the fault messages. | |
| 4.Push the return key. | |
5.Do this procedure again for the channel B of the FADEC system.
|
|
| 6.Push the start test key. |
|
| 7.Make a record of the fault messages. | |
| 8.Push the Return key. | |
NOTE: The table below shows maintenance and ECAM messages which may be occasionally set for reasons which are not necessary for the normal corrective action. The recommended actions for these messages must be done to prevent delays because of corrective actions that are incorrect or not necessary.
Table 1 - Nuisance Fault - Interactive Mode
| Software Effectivity | Maintenance Message | ECAM Message | Nuisance Cause | Recommended Action |
|---|---|---|---|---|
| All software versions: | 00000 Failure Detected | - | This message is set when no faults are present during interactive tests. | No action required. Ignore this message. |
| All software versions: | (None Displayed) | ENGX FUEL FILTER DEGRAD | This message is set during interactive mode engine tests when it is not supposed to be set. | No action required. Ignore this message in interactive mode. A run to idle is necessary to correctly set this fault message. |
| All software versions: | (None Displayed) | ENGX OIL FILTER DEGRAD | This message is set during interactive mode engine tests when it is not supposed to be set. | No action required. Ignore this message in interactive mode. A run to idle is necessary to correctly set this fault message. |
| All software versions: | (None Displayed) | - | If ENGXD-0627-AOP SNSR ELEC FAIL is set, the EEC System test can fail in Channel A with no displayed maintenance message when it should not. | Do the EEC System Test in Channel B to confirm ENGXD-0627-AOP SNSR ELEC FAIL comes on. If YES troubleshoot this message. If NOT, no action is required. |
| All software versions: | ENGXD-0695-EEC INTERNAL FAIL SHORT TIME DISPATCH | - | Reports for this fault message may incorrectly correlate to class 1 instead of class 2. This fault message should always display class 2. | Consider this message class 2, not class 1. Fault class 2 can be confirmed using an EEC power on and Ground Scanning Report check. Dispatch engine as class 2 fault. |
(7) Examine the assembly for foreign objects, damage, and correct assembly.
(8) Make sure that you install COVER - PROTECTION as necessary to prevent damage to the engine.
Subtask 73-21-00-860-070-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) On overhead panel 20VU, make sure that the selector switches of ADIRU 1 and 2 are in the OFF position.
(2) On the ENG section of maintenance panel 50VU:
(a) Push the FADEC GND PWR/1(2) pushbutton switch (the ON legend goes off).
(3) Make sure that the work area is clean and clear of tools and other items.
(4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(1) On overhead panel 20VU, make sure that the selector switches of ADIRU 1 and 2 are in the OFF position.
(2) On the ENG section of maintenance panel 50VU:
(a) Push the FADEC GND PWR/1(2) pushbutton switch (the ON legend goes off).
(3) Make sure that the work area is clean and clear of tools and other items.
(4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).