3. Fault Confirmation
__________________
 NOTE : Before you do this procedure, make sure that the two baro displays on
____ the FCU are on the same scale (BARO, STD) and show the same indication. If there is a differential altitude between CAPT PFD and F/O PFD > 300ft:
 - the CHECK ALT message is shown on the two PFDs with related NAV ALTI DISCREPANCY warning when the two baro displays are QNH or QFE,

 - the NAV BARO REF DISCREPANCY message is shown one the two PFDs when one baro display is in QNH and the other one in QFE.

 A. Test
 (1) Not applicable, the fault is evident.

 4. Fault Isolation
_______________

 A. If the NAV ALTI DISCREPANCY message comes into view on the upper ECAM DU:
 - make sure that the CHECK ALT message is in view on the CAPT PFD or on the F/O PFD.
 (1) If the CHECK ALT message is in view on the CAPT PFD:
 - on the center pedestal, on the SWITCHING panel 8VU, set the EIS DMC selector switch to CAPT/3.
 (a) If the messages go out of view:
 - replace the DMC-1 (1WT1) (Ref. AMM TASK 31-63-34-000-001) and (Ref. AMM TASK 31-63-34-400-001):
 1 If the fault continues:
_
 - do a check of the wiring of the AIR DATA OUTPUT BUS1 bus from the ADIRU1 (1FP1) to the DMC1 (1WT1) (Ref. ASM 34-13/01).
 a If there is no continuity:
_ - repair the above wiring.
 b If there is continuity:
_
 - replace the ADIRU-1 (1FP1) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001).
 (b) If the messages stay in view:
 - replace the ADIRU-1 (1FP1) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001).
 (2) If the CHECK ALT message is in view on the F/O PFD:
 - on the center pedestal, on the SWITCHING panel 8VU, set the EIS DMC selector switch to F/O/3.
 (a) If the messages go out of view:
 - replace the DMC-2 (1WT2) (Ref. AMM TASK 31-63-34-000-001) and (Ref. AMM TASK 31-63-34-400-001).
 1 If the fault continues:
_
 - do a check of the wiring of the AIR DATA OUTPUT BUS1 bus from the ADIRU2 (1FP2) to the DMC2 (1WT2) (Ref. ASM 34-13/01).
 a If there is no continuity:
_ - repair the above wiring.
 b If there is continuity:
_
 - replace the ADIRU-2 (1FP2) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001).
 「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 A250
 Feb 01/05 CES (b) If the messages stay in view:

 - replace the ADIRU-2 (1FP2) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001).
 5. Close-up
________
 A. Put the aircraft back to its initial configuration.
 (1) On the center pedestal, on the SWITCHING panel 8VU, set the EIS DMC selector switch to NORM.

R **ON A/C 051-099, 106-149, 204-299, 301-399, 401-499,

 TASK 34-13-00-810-925
 Loss of the ADIRU1 Input A Signal from the SFCC
 1. Possible Causes
_______________
 - SFCC-1 (21CV)

 - SFCC-2 (22CV)

 - ADIRU-1 (1FP1)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 27-51-34-000-001 Removal of the SFCC (21CV,22CV)
 AMM 27-51-34-400-001 Installation of the SFCC (21CV,22CV)
 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 1) (Ref. AMM TASK 34-13-00-740-002).

 (2) Extend the flaps to full extension.

 4. Fault Isolation
_______________
 A. If the test gives the maintenance message SFCC1/2 (21CV/22CV)/ ADIRU1 (1FP1) AOA INPUT A:
 - replace the SFCC-1 (21CV) (Ref. AMM TASK 27-51-34-000-001) and (Ref. AMM TASK 27-51-34-400-001).
 (1) If the fault continues:

 - replace the SFCC-2 (22CV) (Ref. AMM TASK 27-51-34-000-001) and (Ref. AMM TASK 27-51-34-400-001).

 (2) If the fault continues:

 - do a check and repair the wiring from ADIRU1 (1FP1) pins AA/2J, AA/2H and AA/11F to the first terminal block (Ref. ASM 34-13/02).
　
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