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 4. Fault Isolation
_______________
 A. If the test gives the maintenance message ADIRU3 (1FP3) IR BUS2:
 - replace the ADIRU-3 (1FP3) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001).
 (1) If the fault continues:
 - do a check and repair the wiring of the INERTIAL REFERENCE OUTPUT BUS 2 bus from the ADIRU 3 (1FP3) to the first terminal block (Ref. ASM 34-14/01).
 B. Do the test given in Para. 3.

 Loss of the IR3 BUS3 Output
 1. Possible Causes
_______________
 - ADIRU-3 (1FP3)

 - wiring of the INERTIAL REFERENCE OUTPUT BUS 3 bus from the ADIRU 3 (1FP3) to the first terminal block

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 34-12-34-000-001 Removal of the ADIRU (1FP1, 1FP2, 1FP3)
 AMM 34-12-34-400-001 Installation of the ADIRU (1FP1, 1FP2, 1FP3)
 AMM 34-14-00-740-001 Interface Test of the IR
 ASM 34-14/01

 3. Fault Confirmation
__________________
 A. Test Do the Interface test of the IR (system 3) (Ref. AMM TASK 34-14-00-740-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message ADIRU3 (1FP3) IR BUS3:
 - replace the ADIRU-3 (1FP3) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001).
 (1) If the fault continues:
 - do a check and repair the wiring of the INERTIAL REFERENCE OUTPUT BUS 3 bus from the ADIRU 3 (1FP3) to the first terminal block (Ref. ASM 34-14/01).
 B. Do the test given in Para. 3.

 Loss of the IR1 BUS Outputs
 1. Possible Causes
_______________
 - ADIRU-1 (1FP1)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 34-12-34-000-001 Removal of the ADIRU (1FP1, 1FP2, 1FP3) AMM 34-12-34-400-001 Installation of the ADIRU (1FP1, 1FP2, 1FP3) AMM 34-14-00-740-001 Interface Test of the IR
 3. Fault Confirmation
__________________
 A. Test Do the Interface test of the IR (system 1) (Ref. AMM TASK 34-14-00-740-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance messages ADIRU1 (1FP1) IR BUS1, ADIRU1 (1FP1) IR BUS2 and ADIRU1 (1FP1) IR BUS3:
 - replace the ADIRU-1 (1FP1) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001).
 B. Do the test given in Para. 3.

 Loss of the IR2 BUS Outputs
 1. Possible Causes
_______________
 - ADIRU-2 (1FP2)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 34-12-34-000-001 Removal of the ADIRU (1FP1, 1FP2, 1FP3) AMM 34-12-34-400-001 Installation of the ADIRU (1FP1, 1FP2, 1FP3) AMM 34-14-00-740-001 Interface Test of the IR
 3. Fault Confirmation
__________________
 A. Test Do the Interface test of the IR (system 2) (Ref. AMM TASK 34-14-00-740-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance messages ADIRU2 (1FP2) IR BUS1, ADIRU2 (1FP2) IR BUS2 and ADIRU2 (1FP2) IR BUS3:
 - replace the ADIRU-2 (1FP2) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001).
 B. Do the test given in Para. 3.

 Loss of the IR3 BUS Outputs
 1. Possible Causes
_______________
 - ADIRU-3 (1FP3)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 34-12-34-000-001 Removal of the ADIRU (1FP1, 1FP2, 1FP3) AMM 34-12-34-400-001 Installation of the ADIRU (1FP1, 1FP2, 1FP3) AMM 34-14-00-740-001 Interface Test of the IR
 3. Fault Confirmation
__________________
 A. Test Do the Interface test of the IR (system 3) (Ref. AMM TASK 34-14-00-740-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance messages ADIRU3 (1FP3) IR BUS1, ADIRU3 (1FP3) IR BUS2 and ADIRU3 (1FP3) IR BUS3:
　
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