W DOC AIRBUS | TSM A320F

Failure of the CFDIU Detected by the ADF 2

TASK 31-32-00-810-874-A
Failure of the CFDIU Detected by the ADF 2

1. Possible Causes
  • CFDIU [1TW]
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
ASM 313203
AMM 31-32-34-000-001
Removal of the CFDIU
AMM 31-32-34-400-001
Installation of the CFDIU
AMM 34-53-00-740-003
BITE Test of the ADF
3. Fault Confirmation
Subtask 31-32-00-865-122-A ** ON A/C NOT FOR ALL
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUCOM NAV/ADF/21RP2K02
Subtask 31-32-00-740-192-A ** ON A/C NOT FOR ALL
B. Test
Do the BITE test of the ADF (system 2) AMM 34-53-00-740-003.
Subtask 31-32-00-740-192-B ** ON A/C NOT FOR ALL
B. Test
Do the BITE test of the ADF (system 2) AMM 34-53-00-740-003.
4. Fault Isolation
Subtask 31-32-00-810-123-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ADF2 NO DATA FROM CFDIU:
   (1) If the fault continues:
  • do a check and repair the wiring from the CFDIU (1TW) pins AB/2H, 2J to the first terminal block , ASM 313203.
Subtask 31-32-00-740-193-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.
Subtask 31-32-00-810-123-C ** ON A/C NOT FOR ALL
C. If the test gives the maintenance message CFDIU (1TW)/ADF2 (2RP2):
   (1) If the fault continues:
  • do a check and repair the wiring : from the CFDIU (1TW) pins AB/2H, 2J to the first terminal block , ASM 313203.
Subtask 31-32-00-740-193-B ** ON A/C NOT FOR ALL
D. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:29:53 UTC
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