4. Fault Isolation
_______________
A. If the OFF legend of the ADR 3 pushbutton switch does not come on:
- on the panel 25VU, set the INT LT/ANN LT switch to TEST and make sure that the OFF legend comes on.
(1) If the OFF legend comes on:
- replace the ADIRU-3 (1FP3) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001).
(a) If the OFF legend stays off when the ADR 3 pushbutton switch is pushed:
- replace the BOARD-ANN LT TEST & INTFC (4LP) (Ref. AMM TASK 33-14-33-000-001) and (Ref. AMM TASK 33-14-33-400-001).
1 If the fault continues:
_
- do a check of the wiring of the ADR OFF discrete from the ADIRU3 (1FP3) to the annunciator light test and interface board (4LP) (Ref. ASM 34-13/02).
a If there is no continuity:
_ - repair the above wiring.
b If there is continuity:
_
- replace the CDU-ADIRS (2FP) (Ref. AMM TASK 34-12-12-000-001) and (Ref. AMM TASK 34-12-12-400-001).
. If the fault continues:
- do a check and repair the wiring of the ADR OFF CMD discrete from the ADIRU3 (1FP3) to the ADIRS CDU (2FP) (Ref. ASM 34-13/02).
(2) If the OFF legend does not come on:
- replace the BOARD-ANN LT TEST & INTFC (4LP) (Ref. AMM TASK 33-14-33-000-001) and (Ref. AMM TASK 33-14-33-400-001).
(a) If the fault continues:
- replace the CDU-ADIRS (2FP) (Ref. AMM TASK 34-12-12-000-001) and (Ref. AMM TASK 34-12-12-400-001).
1 If the fault continues:
_
- do a check and repair the wiring of the annunciator light test and interface board (4LP): . from pin A/13 to ADIRS CDU (2FP) pin C/21 . from pin A/15 to pin A/11 . from pin A/12 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 A244
Feb 01/05 CES 5. Close-up
________
A. Put the aircraft back to its initial configuration.
(1) On the panel 25VU, set the ANN LT switch to BRT.
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
TASK 34-13-00-810-921 Loss of the FCU Data Input Bus on the ADIRU1
1. Possible Causes
_______________
- ADIRU-1 (1FP1)
- wiring of the DIGITAL BARO CORRECTION A bus from the ADIRU1 (1FP1) 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 34-13-00-740-002 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).
4. Fault Isolation
_______________
A. If the test gives the maintenance message FCU (3CA)/ADIRU1 (1FP1):
- replace the ADIRU-1 (1FP1) (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 DIGITAL BARO CORRECTION A bus from the ADIRU1 (1FP1) 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 A246
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