W DOC AIRBUS | AMM A320F

Oil Debris Reset (Menu Mode) [CFML]

TASK 79-36-00-740-801-A
Oil Debris Reset (Menu Mode)

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
ZONE: 400
1. Reason for the Job
PRE CFM SB 73-0021
This option will be used to clear the count of the number of metallic chips that have been detected by the oil debris monitoring system during the last flight and the cumulative count during all flights. This function will only be available on channel B.
END OF PRE CFM SB 73-0021
POST CFM SB 73-0021
This option will be used to set the number of metallic chips that have been detected by the oil debris monitoring system for the cumulative count during all flights. This value should be set to zero when you clean and do an inspection of the ODMS chips or set to previous chip count if you reprogram or replace EEC channel B and not clean and do an inspection of the ODMS chips. This function will only be available on channel B.
END OF POST CFM SB 73-0021
2. Job Set-up Information
 A. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
 B. 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
F FUNCTION TERMINATED page
F ENGINE MAIN MENU Page
F SPECIAL FUNCTIONS Page - PRE CFM SB 73-0021
F OIL DEBRIS RESET Page
F OIL DEBRIS RESET Page (with CONFIRM RESET Indication)
F OIL DEBRIS RESET Page (NVM Store Failed)
F SPECIAL FUNCTIONS Page - POST CFM SB 73-0021
F Oil Debris Chip Count Entry Input Screen - POST CFM SB 73-0021
F DMS Chip Count Entry Confirmation Screen - POST CFM SB 73-0021
F DMS Chip Count Invalid Entry Screen - POST CFM SB 73-0021
3. Job Set-up
Subtask 79-36-00-861-050-A
A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 79-36-00-865-050-A
B. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
49VUENGINE/1/FADEC A/AND EIU 12KS1A04
121VUENGINE/ENG1/FADEC B/AND EIU 14KS1R40
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
49VUENGINE/2/FADEC A/AND EIU 22KS2A05
121VUENGINE/ENG2/FADEC B/AND EIU24KS2R41
Subtask 79-36-00-866-050-A
C. Aircraft Maintenance Configuration
   (1) On ENG panel 115VU:
     (a) Make sure that the ENG MASTER switch 1(2) is set to OFF.
     (b) Make sure that the ENG/MODE rotary selector switch is set to NORM.
   (2) On the ENG section of maintenance panel 50VU:
     (a) Release the FADEC GND PWR1(2) pushbutton switch. The ON legend of this pushbutton switch 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 the left or right MCDU, get the SYSTEM REPORT/TEST/ENG page (Ref. AMM TASK 31-32-00-860-012).
4. Procedure
Subtask 79-36-00-740-050-A
A. Oil Debris Reset
NOTE: The EEC will not enter the menu mode (interactive mode) after an enquire command from the Centralized Fault Display System (CFDS) when any of the following conditions are set:
  • N2 more than ten percent or invalid
  • Engine not off or engine initializing
  • Engine not in default start state
  • Throttle Lever Angle (TLA) not at idle or invalid
  • Aircraft in the air
  • MASTER lever on or invalid
  • BITE command code input label invalid.
NOTE: The EEC will abort the oil debris function and display the FUNCTION TERMINATED page when any of the following conditions becomes set:
  • N2 more than ten percent or invalid
  • Engine not in default start state
  • Throttle Lever Angle (TLA) not at idle or invalid
  • MASTER lever on or invalid
  • You enter in the interactive mode of the other channel
  • RETURN key is selected on the MCDU during a running test or a special function.
    Refer to the figure.
    F FUNCTION TERMINATED page
NOTE: If one of the following conditions occurs while the menu mode is active, Menu Mode session will be exited directly, without displaying a specific screen:
  • RETURN key selected on main menu screen
  • Channel in Menu Mode is not the active channel
  • Invalid BITE command or invalid equipment code received by the EEC
  • A LOGOFF condition received by the EEC
  • Engine start detected whereas function requiring idle speed (as idle test, vibration ground run) is not active
  • Selected Mach is more than 0.12 or invalid
  • Aircraft indicates in air.
PRE CFM SB 73-0021
NOTE: During the test, obey the instructions shown on the MCDU.
ACTION
RESULT
1.Initialize Menu Mode on the applicable engine and EEC, by selecting FADEC XY (X = engine position, Y = channel number). For this test, Y shall be set to B because this function is only available on channel B.

2.On the MCDU ENGINE MAIN MENU page:
SPECIAL FUNCTIONS pages will be shown.
F SPECIAL FUNCTIONS Page - PRE CFM SB 73-0021
3.On the SPECIAL FUNCTIONS main page:
  • Select: OIL DEBRIS RESET (3L).
The page display the chip count from the last flight and cumulative count.
F OIL DEBRIS RESET Page
4.On the MCDU OIL DEBRIS RESET page:
  • Select: RESET CHIP COUNT (5R).
Confirm reset will be shown.
F OIL DEBRIS RESET Page (with CONFIRM RESET Indication)
Wait a minimum of four seconds.

The EEC must perform the following:
  • If the NVM store is successful, the cumulative count is reset at 0.
NOTE: The last flight count is unchanged and can be reset only through EEC depowering.
5.On the MCDU OIL DEBRIS RESET page:
  • Select RETURN.
The SPECIAL FUNCTIONS main page will be shown.
6.On the SPECIAL FUNCTIONS main page:
  • Select RETURN.
The MCDU Home page comes into view.

END OF PRE CFM SB 73-0021

POST CFM SB 73-0021
NOTE: During the test, obey the instructions shown on the MCDU.
ACTION
RESULT
1.Initialize Menu Mode on the applicable engine and EEC, by selecting FADEC XY (X = engine position, Y = channel number). For this test, Y shall be set to B because this function is only available on channel B.

2.On the MCDU ENGINE MAIN MENU page:
SPECIAL FUNCTIONS page will be shown.
F SPECIAL FUNCTIONS Page - POST CFM SB 73-0021
3.On the SPECIAL FUNCTIONS main page:
  • Select: OIL DEBRIS RESET (3L).
The page display the chip count from the last flight and cumulative count.
F OIL DEBRIS RESET Page
4.On the MCDU OIL DEBRIS RESET page:
  • Select: RESET CHIP COUNT (5R).
Oil Debris Chip Count Entry Input screen will be shown.
F Oil Debris Chip Count Entry Input Screen - POST CFM SB 73-0021
5.On the MCDU Oil Debris Count Entry Input screen:
  • Enter the cumulative chip count.
The SPECIAL FUNCTIONS main page will be shown.
NOTE: The input value must consist of two characters (0-9 for each character). The cumulative chip count entered must be between 00-19.
NOTE: An input of zero should be entered if the oil debris monitoring sensor has been cleaned and inspected. If you reprogram or replace EEC channel B, enter the previous cumulative chip count.
6.On the MCDU Oil Debris Count Entry Input screen:
  • Select NEXT (5R).
If the input value is correct (two characters with a value between 00-19), the DMS Chip Count Entry Confirmation screen is shown.
F DMS Chip Count Entry Confirmation Screen - POST CFM SB 73-0021

If the input is not correct, the DMS Chip Count Invalid Entry screen is shown.
F DMS Chip Count Invalid Entry Screen - POST CFM SB 73-0021
Select RETURN (5R) and the SPECIAL FUNCTIONS main screen is shown.
7.On the MCDU DMS Chip Count Entry Confirmation screen, verify that the entered chip count is correct.
  • If correct, select: CONFIRM (5R).
  • If not correct, select: UPDATE (5L).
If CONFIRM (5R) was selected and the NVM store was successful, the OIL DEBRIS RESET page (with CONFIRM RESET indication) is shown. Wait a minimum of four seconds.
F OIL DEBRIS RESET Page (with CONFIRM RESET Indication)

If the NVM store failed, the OIL DEBRIS RESET page (NVM Store Failed) is shown.
F OIL DEBRIS RESET Page (NVM Store Failed)

If UPDATE (5L) was selected, the OIL Debris Count Entry Input screen is shown.
F Oil Debris Chip Count Entry Input Screen - POST CFM SB 73-0021
Apply the previous steps from step 5 again.
8.On the MCDU OIL DEBRIS RESET page:
  • Select RETURN.
The SPECIAL FUNCTIONS main page will be shown.
9.On the SPECIAL FUNCTIONS main page:
  • Select RETURN.
The MCDU Home page comes into view.
END OF POST CFM SB 73-0021
5. Close-up
Subtask 79-36-00-862-050-A
A. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
Subtask 79-36-00-860-050-A
B. Put the aircraft back to its initial configuration.
   (1) Make sure that the work area is clean and clear of tools and other items.
[Rev.10 from 2021] 2026.04.01 13:07:12 UTC
"Aviabrain" 2025