W DOC AIRBUS | TSM A320F

Air Data Portion of the ADIRU1 Unserviceable

TASK 34-11-00-810-889-A
Air Data Portion of the ADIRU1 Unserviceable

1. Possible Causes
  • ADIRU-1 [1FP1]
  • ADM-L TOTAL PRESSURE [19FP1]
  • ADM-R STATIC PRESSURE [19FP4]
  • ADM-L STATIC PRESSURE [19FP5]
  • wiring between the ADIRU1 and the connector receptacle of the L total pressure ADM (19FP1)
  • wiring between the connector receptacle of the R static pressure ADM (19FP4) and the first terminal block
  • wiring between the connector receptacle of the L static pressure ADM (19FP5) and the first terminal block
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
ASM 341303
AMM 34-14-00-740-001
Interface Test of the IR
3. Fault Confirmation
Subtask 34-11-00-740-134-A
A. Do the interface test of the IR (system 1) AMM 34-14-00-740-001.
4. Fault Isolation
Subtask 34-11-00-810-206-B
A. If the test gives the maintenance message ADIRU1 (1FP1) ADR BUS 1:
   (1) If the fault stops:
  • replace the ADIRU that you installed on side 2.
   (2) If the fault continues:
  • get access to the ADM-L TOTAL PRESSURE [19FP1] , ADM-R STATIC PRESSURE [19FP4] and ADM-L STATIC PRESSURE [19FP5] AMM 34-11-17-000-001 (Para. 2.A.)
  • disconnect the electrical connector of the L total pressure ADM (19FP1) and make sure that there is +13.5V between pins A/C, A and -13.5V between pins A/C, E of the connector receptacle ASM 341303.
     (a) If the voltages are not OK:
  • do a check and repair the wiring between the ADIRU1 and the connector receptacle of the L total pressure ADM (19FP1): for pins AA/6G, 6H and 6J of the ADIRU1 and pins A/A, C and E of the connector receptacle
  • connect the electrical connector of the L total pressure ADM (19FP1).
     (b) If the voltages are OK:
  • disconnect the electrical connector of the R static pressure ADM (19FP4) and make sure that there is +13.5V between pins A/C, A and -13.5V between pins A/C, E of the connector receptacle ASM 341303.
       1 If the voltages are not OK:
  • do a check and repair the wiring between the connector receptacle of the R static pressure ADM (19FP4) and the first terminal block: for pins A/A, C and E of the connector receptacle
  • connect the electrical connectors of the L total pressure ADM (19FP1) and the R static pressure ADM (19FP4).
       2 If the voltages are OK:
  • disconnect the electrical connector of the L static pressure ADM (19FP5) and make sure that there is +13.5V between pins A/C, A and -13.5V between pins A/C, E of the connector receptacle ASM 341303.
         a If the voltages are not OK:
  • do a check and repair the wiring between the connector receptacle of the L static pressure ADM (19FP5) and the first terminal block: for pins A/A, C and E of the connector receptacle
  • connect the electrical connectors of the L total pressure ADM (19FP1) and the R static pressure ADM (19FP4) and the L static pressure ADM (19FP5).
         b If the voltages are OK and if the fault continues:
* If the fault continues:
replace the ADM-L STATIC PRESSURE [19FP5] .
Subtask 34-11-00-740-135-A
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:32:18 UTC
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