W DOC AIRBUS | TSM A320F

Failure of the ADM Power Supply of the ADIRU1

TASK 34-11-00-810-883-A
Failure of the ADM Power Supply of the ADIRU1

1. Possible Causes
  • ADIRU-1 [1FP1]
  • ADM-L TOTAL PRESSURE [19FP1]
  • ADM-R STATIC PRESSURE [19FP4]
  • ADM-L STATIC PRESSURE [19FP5]
  • aircraft wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 34-11-17-000-001
Removal of the Air Data Module
AMM 34-11-17-400-001
Installation of the Air Data Module
AMM 34-12-34-000-001
Removal of the ADIRU
AMM 34-12-34-400-001
Installation of the ADIRU
AMM 34-13-00-740-002
INTERFACE TEST of the ADR
ASM 341303
3. Fault Confirmation
Subtask 34-11-00-740-122-A ** ON A/C NOT FOR ALL
A. Test
Do the Interface test of the ADR (system 1) AMM 34-13-00-740-002.
4. Fault Isolation
Subtask 34-11-00-810-195-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ADM1 (19FP1)/ ADM4 (19FP4)/ ADM5 (19FP5):
  • remove the ADIRU-1 [1FP1] AMM 34-12-34-000-001
  • make sure that there is no continuity between pins AA/6G, 6H, between pins AA/6H, 6J and between pins AA/6G, 6J of the rack connector.
   (1) If there is no continuity:
   (2) If there is continuity:
  • get access to the ADM-L TOTAL PRESSURE [19FP1] AMM 34-11-17-000-001 (Para. 2.B.)
  • disconnect the electrical connector of the ADM1 and make sure that there is no continuity between pins A/A, C, between pins A/C, E and between pins A/A, E of the ADM1.
     (a) If there is continuity:
     (b) If there is no continuity:
  • get access to the ADM-R STATIC PRESSURE [19FP4] and the ADM-L STATIC PRESSURE [19FP5] AMM 34-11-17-000-001 (Para. 2.B.)
  • disconnect the electrical connector of the ADM4 and make sure that there is no continuity between pins A/A, C, between pins A/C, E and between pins A/A, E of the ADM4.
       1 If there is continuity:
       2 If there is no continuity:
  • disconnect the electrical connector of the ADM5 and make sure that there is no continuity between pins A/A, C, between pins A/C, E and between pins A/A, E of the ADM5.
         a If there is continuity:
  • replace the ADM5
  • connect the electrical connector of the ADM1 and 4
  • install the ADIRU1.
         b If there is no continuity:
  • do a check and repair the aircraft wiring between ADIRU1 pins AA/6G, 6H, 6J and the related LRU ASM 341303
  • connect the electrical connector of the ADM
  • install the ADIRU1.
Subtask 34-11-00-740-123-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:32:18 UTC
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