1. Possible Causes
_______________
 - ADIRU-2 (1FP2)

 - FCU (2CA)

 - wiring of the DIGITAL BARO CORRECTION A bus from the ADIRU2 (1FP2) to the first terminal block

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 22-81-12-000-001 Removal of the FCU (2CA)
 AMM 22-81-12-400-001 Installation of the FCU (2CA)
 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 34-13-00-740-002 INTERFACE TEST of the ADR
 ASM 34-13/02

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the Interface test of the ADR (system 2) (Ref. AMM TASK 34-13-00-740-002).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message FCU (3CA)/ADIRU2 (1FP2):
 - replace the ADIRU-2 (1FP2) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001).
 (1) If the fault continues:

 - replace the FCU (2CA) (Ref. AMM TASK 22-81-12-000-001) and (Ref. AMM TASK 22-81-12-400-001).

 (2) If the fault continues:

 - do a check and repair the wiring of the DIGITAL BARO CORRECTION A bus from the ADIRU2 (1FP2) to the first terminal block (Ref. ASM 34-13/02).
 B. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-13-00∞∞∞∞∞∞∞∞∞∞Page A247
 Feb 01/05R CES

 Loss of the FCU Data Input Bus on the ADIRU3
 1. Possible Causes
_______________
 - ADIRU-3 (1FP3)

 - FCU (2CA)

 - wiring of the DIGITAL BARO CORRECTION A bus from the ADIRU3 (1FP3) to the first terminal block

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 22-81-12-000-001 Removal of the FCU (2CA)
 AMM 22-81-12-400-001 Installation of the FCU (2CA)
 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 34-13-00-740-002 INTERFACE TEST of the ADR
 ASM 34-13/02

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the Interface test of the ADR (system 3) (Ref. AMM TASK 34-13-00-740-002).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message FCU (3CA)/ ADIRU3 (1FP3):
 - 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:

 - replace the FCU (2CA) (Ref. AMM TASK 22-81-12-000-001) and (Ref. AMM TASK 22-81-12-400-001).

 (2) If the fault continues:

 - do a check and repair the wiring of the DIGITAL BARO CORRECTION A bus from the ADIRU3 (1FP3) to the first terminal block (Ref. ASM 34-13/02).
 B. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : ALL ∞∞34-13-00∞∞∞∞∞∞∞∞∞∞Page A248
 Feb 01/05 CES Altitude Discrepancy Warning on the Upper ECAM Display Unit

 1. Possible Causes
_______________
 - DMC-1 (1WT1)

 - ADIRU-1 (1FP1)

 - DMC-2 (1WT2)

 - ADIRU-2 (1FP2)

 - wiring of the AIR DATA OUTPUT BUS1 bus from the ADIRU1 (1FP1) to the DMC1 (1WT1)

 - wiring of the AIR DATA OUTPUT BUS1 bus from the ADIRU2 (1FP2) to the DMC2 (1WT2)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 31-63-34-000-001 Removal of the DMC (1WT1,1WT2,1WT3)
 AMM 31-63-34-400-001 Installation of the DMC (1WT1,1WT2,1WT3)
 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)
　
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