W DOC AIRBUS | AMM A320F

Read the CLASS 3 REPORT [CFMI]

TASK 73-21-60-740-001-A
Read the CLASS 3 REPORT

1. Reason for the Job
Self explanatory
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 31-32-00-860-012-A
Procedure to Get Access to the SYSTEM REPORT/TEST/ENG Page
F CLASS 3 REPORT - MCDU Screens ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 73-21-60-861-072-B ** ON A/C NOT FOR ALL
A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
Subtask 73-21-60-869-074-B ** ON A/C NOT FOR ALL
B. Preparation for test
   (1) On the overhead maintenance panel 50VU, push then release the ENG/FADEC GND PWR/1(2) pushbutton switch. The ON legend comes on.
   (2) On the left or right MCDU get the SYSTEM REPORT/TEST ENG page (Ref. AMM TASK 31-32-00-860-012).
4. Procedure
Subtask 73-21-60-740-071-B ** ON A/C NOT FOR ALL
A. Do this procedure for the ECU 1(2) channel A.
F CLASS 3 REPORT - MCDU Screens ** ON A/C NOT FOR ALL
NOTE: This test is for the system 1. For the other system(s), use the indications between the parentheses.
ACTION
RESULT
1.On the MCDU:

  • Push the line key adjacent to the FADEC 1A (2A) indication.
  • The ENGINE 1(2) MAIN MENU page comes into view.
2.Push the line key adjacent to the CLASS 3 REPORT indication.
  • The CLASS 3 REPORT ENGINE 1(2) CHANNEL A menu comes into view.
  • If no faults are shown, NO FAULTS RECORDED indication comes into view.
  • If there are faults, they will be shown. If a ">" symbol comes into view at the top right hand corner of the MCDU screen, use the PAGE DOWN key to get more pages of fault data. To find the fault messages, refer to the Trouble Shooting Manual.
  • If there is a NVM failure, the NVM FAULT: DATA NOT RETRIEVABLE indication comes into view.


   (1) Do this procedure for the ECU 1(2) channel B.
   (2) On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
   (3) Stop the MCDU.
5. Close-up
Subtask 73-21-60-860-077-B ** ON A/C NOT FOR ALL
A. On the overhead maintenance panel 50VU:
  • Push the ENG/FADEC GND PWR 1(2) pushbutton switch. The ON legend goes off.
[Rev.10 from 2021] 2026.04.01 02:56:53 UTC
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