W DOC AIRBUS | TSM A320F

Loss of the ADC 3 Output Bus by the DMC 3

TASK 31-63-00-810-837-A
Loss of the ADC 3 Output Bus by the DMC 3

1. Possible Causes
  • DMC-3 [1WT3]
  • ADIRU-3 [1FP3]
  • wiring from the ADIRU 3 (1FP3) to the DMC 3 (1WT3)
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 31-60-00-740-002
Perform Electronic Instrument System (EIS) Input Test
AMM 31-60-00-740-007
GROUND SCANNING Test of the DMC
ASM 316201
AMM 31-63-34-000-001
Removal of the DMC
AMM 31-63-34-400-001
Installation of the DMC
AMM 34-12-34-000-001
Removal of the ADIRU
AMM 34-12-34-400-001
Installation of the ADIRU
3. Fault Confirmation
Subtask 31-63-00-865-069-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUNAV PROBES/ADIRU3/PWR/SWTG8FPF09
** ON A/C NOT FOR ALL
49VUNAV PROBES/ADIRU3/PWR/SWTG8FPF08
** ON A/C ALL
121VUADIRS/ADIRU/3PWR/SWTG9FPN09
121VUADIRS/ADIRU/3/26VAC AND AOA5FP3N07
121VUADIRS/ADIRU/3/115VAC4FP3N05
121VUADIRS/ADIRU/3/28VDC6FP3N03
Subtask 31-63-00-740-084-A ** ON A/C NOT FOR ALL
B. Test
Do the EIS input test AMM 31-60-00-740-002.
Subtask 31-63-00-740-084-B ** ON A/C NOT FOR ALL
B. Test
Do the Ground Scanning Test of the DMC AMM 31-60-00-740-007.
4. Fault Isolation
Subtask 31-63-00-810-085-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message DMC 3 : NO ADC 3 DATA:
   (1) If the fault continues:
   (2) If the fault continues:
  • do a check and repair the wiring from the ADIRU 3 (1FP3) to the DMC 3 (1WT3) ASM 316201.
Subtask 31-63-00-810-085-B ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ADIRU3(1FP3) BUS1 ADR/DMC3(1WT3)
   (1) If the fault continues:
  • do a check and repair the wiring from the ADIRU3 (1FP3) pins AA-3A/3B to the DMC3 (1WT3) pins AA-3E/3F ASM 316201.
   (2) If the fault continues:
Subtask 31-63-00-740-085-A
B. Do the test given in Para. 3.B.
[Rev.8 from Aug 2018] 2026.04.04 04:30:39 UTC
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