- replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).

 (2) If the fault continues:

 - do a check and repair the wiring from the EIU-1 (1KS1) to the board (8LP) pin AB/9A to pin AA/21 (Ref. ASM 73-25/09).
 B. Do the test given in Para. 3.A.
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 TASK 73-25-00-810-858
 Failure of the Annunciator Light Test and Interface Board for Engine 2
 1. Possible Causes
_______________
 - BOARD-ANN LT TEST & INTFC (19LP)

 - EIU-2 (1KS2)

 - wiring from the EIU-2 (1KS2) to the 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 73-25-34-000-040 Removal of the Engine Interface Unit (EIU) (1KS1,1KS2) AMM 73-25-34-400-040 Installation of the Engine Interface Unit (EIU)
 (1KS1,1KS2)
 AMM 73-25-34-710-043 Operational Test of the Engine Interface Unit
 ASM 73-25/09

 3. Fault Confirmation
__________________
 A. Test Do the operational test of the engine interface unit through the CFDS (Ref. AMM TASK 73-25-34-710-043).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CHECK 19LP RELAY CIRCUIT OR EIU
 2:

 - 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:

 - replace the EIU-2 (1KS2) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).

 (2) If the fault continues:

 - do a check and repair the wiring from the EIU-2 (1KS2) to the board (19LP). pin AB/9A to pin AA/3 (Ref. ASM 73-25/09).
 B. Do the test given in Para. 3.A.
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 TASK 73-25-00-810-859

 Failure of the N1 Speed Condition Relay for Engine 1
 1. Possible Causes
_______________
 - EIU-1 (1KS1)

 - RELAY-N1 SPEED CONDTN (2708GJ)

 - wiring from the EIU-1 (1KS1) to the relay (2708GJ)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 73-25-34-000-040 Removal of the Engine Interface Unit (EIU)
 (1KS1,1KS2)
 AMM 73-25-34-400-040 Installation of the Engine Interface Unit (EIU)

 (1KS1,1KS2)
 AMM 73-25-34-710-043 Operational Test of the Engine Interface Unit
 ASM 29-12/02

 3. Fault Confirmation
__________________
 A. Do the operational test of the engine interface unit through the CFDS (Ref. AMM TASK 73-25-34-710-043).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CHECK 2708GJ RELAY CIRCUIT OR EIU 1:
 - replace the RELAY-N1 SPEED CONDTN (2708GJ) (Ref. ASM 29-12/02).
 (1) If the fault continues:

 - replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).

 (2) If the fault continues:

 - do a check and repair the wiring from the EIU-1 (1KS1) to the relay (2708GJ) pin AB/9E to pin Z.
 B. Do the test given in Para. 3.A.
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