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

 - BOARD-ANN LT TEST & INTFC (19LP)

 - CDU-ADIRS (2FP)

 - wiring of the ADR OFF discrete from the ADIRU2 (1FP2) to the annunciator light test and interface board (19LP)

 - wiring of the ADR OFF CMD discrete from the ADIRU2 (1FP2) to the ADIRS CDU (2FP

 - wiring of the annunciator light test and interface board (19LP)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 33-14-33-000-001 Removal of the Annunciator-Light Test and Interface-Board (1LP, 2LP, 3LP, 4LP, 5LP, 6LP, 7LP, R 8LP, 9LP, 10LP, 11LP, 12LP, 18LP, 19LP, 20LP) AMM 33-14-33-400-001 Installation of the Annunciator-Light Test and Interface-Board (1LP, 2LP, 3LP, 4LP, 5LP, 6LP, 7LP,
R 8LP, 9LP, 10LP, 11LP, 12LP, 18LP, 19LP, 20LP) AMM 34-10-00-860-002 ADIRS Start Procedure AMM 34-10-00-860-005 ADIRS Stop Procedure AMM 34-12-12-000-001 Removal of the ADIRS CDU (2FP) AMM 34-12-12-400-001 Installation of the ADIRS CDU (2FP) 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) ASM 34-13/02
 3. Fault Confirmation
__________________
 A. Job Set-Up
 (1) Do the ADIRS start procedure (Ref. AMM TASK 34-10-00-860-002).
 B. Test
 (1) On the ADIRS CDU, push the ADR 2 pushbutton switch and make sure that the OFF legend comes on.

 4. Fault Isolation
_______________

 A. If the OFF legend of the ADR 2 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-2 (1FP2) (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 2 pushbutton switch is pushed:
 - replace the BOARD-ANN LT TEST & INTFC (19LP) (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 ADIRU2 (1FP2) to the annunciator light test and interface board (19LP) (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 ADIRU2 (1FP2) 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 (19LP) (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 (19LP): . from pin A/13 to ADIRS CDU (2FP) pin B/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.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-13-00∞∞∞∞∞∞∞∞∞∞Page A241
 Feb 01/05R 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).

 The OFF Legend of the ADR3 Pushbutton Switch does not come on
 1. Possible Causes
_______________
 - ADIRU-3 (1FP3)

 - BOARD-ANN LT TEST & INTFC (4LP)

 - CDU-ADIRS (2FP)

 - wiring of the ADR OFF discrete from the ADIRU3 (1FP3) to the annunciator light test and interface board (4LP)

 - wiring of the ADR OFF CMD discrete from the ADIRU3 (1FP3) to the ADIRS CDU (2FP)

 - wiring of the annunciator light test and interface board (4LP)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
　
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