W DOC AIRBUS | TSM A320F

Different Left Static Pressure on the ADIRU 1 and the ADIRU 2

TASK 34-11-00-810-837-A
Different Left Static Pressure on the ADIRU 1 and the ADIRU 2

1. Possible Causes
  • PROBE-L STATIC, 1 [7DA1]
  • PROBE-L STATIC, 2 [7DA2]
  • ADM-L STATIC PRESSURE [19FP5]
  • ADM-L STATIC PRESSURE [19FP7]
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
ARINC READER
 B. Referenced Information
REFERENCE
DESIGNATION
AMM 34-10-00-170-002
Flushing of the Principal Static Pressure Lines
AMM 34-10-00-860-002
ADIRS Start Procedure
AMM 34-11-16-000-001
Removal of the Static Probe
AMM 34-11-16-400-002
Installation of the Static Probe
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 34-13-00-790-002
Leak Test of the Principal Static and Total Air Data System
ASM 341301
3. Fault Confirmation
Subtask 34-11-00-710-053-A
A. Test
Not applicable, you cannot confirm this fault on the ground.
4. Fault Isolation
Subtask 34-11-00-810-086-B
A. If the POST FLIGHT REPORT gives the maintenance message ADM5 (19FP5)/ ADM7 (19FP7):
  • do a visual check of the PROBE-L STATIC, 1 [7DA1] and PROBE-L STATIC, 2 [7DA2] .
   (1) If the L static probe 1 or L static probe 2 is damaged:
   (2) If the static probes are not damaged:
  • do the ADIRS start procedure AMM 34-10-00-860-002
  • connect the ARINC READER to the test connector 198VC on the panel 188VU and to the test connector 199VC on the panel 187VU ASM 341301
  • compare the static ADM pressure read on these labels:
    ADIRU 1 199VC ! 19FP5 LABEL 176
    pins GG, HH !
    !
    ADIRU 2 198VC ! 19FP7 LABEL 176
    pins GG, HH !

     (a) If a value is different:
     (b) If the values are the same:
Subtask 34-11-00-810-087-A
B. After the subsequent flight, if the fault continues:
Subtask 34-11-00-810-088-A
C. After the subsequent flight, if the fault continues:
[Rev.8 from Aug 2018] 2026.04.04 04:32:15 UTC
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