Failure of the N2 Speed Condition Relay for Engine 2
 1. Possible Causes
_______________
 - EIU-2 (1KS2)

 - RELAY-N2 SPEED CONDTN (2709GJ)

 - wiring from the EIU-2 (1KS2) to the relay (2709GJ)

 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 2709GJ RELAY CIRCUIT OR EIU 2:
 - replace the RELAY-N2 SPEED CONDTN (2709GJ) (Ref. ASM 29-12/02).
 (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 relay (2709GJ) pin AB/9E to pin Z.
 B. Do the test given in Para. 3.A.
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 TASK 73-25-00-810-861
 Failure of the HP Fuel SOV Closed Discrete Output on the EIU 1
 1. Possible Causes
_______________
 - CONT-ZONE TEMPERATURE (8HK)

 - EIU-1 (1KS1)

 - wiring from the EIU-1 (1KS1) to the zone temperature controller (8HK)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 21-63-34-000-001 Removal of the Zone Controller (8HK)
 AMM 21-63-34-400-001 Installation of the Zone Controller (8HK)
 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. 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 ZONE CONT 8HK/EIU 1 CIRCUIT:
 - replace the CONT-ZONE TEMPERATURE (8HK) (Ref. AMM TASK 21-63-34-000-001) and (Ref. AMM TASK 21-63-34-400-001).
 (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 zone temperature controller (8HK) pin AB/1E to pin AB/1K (Ref. ASM 73-25/09).
 B. Do the test given in Para. 3.A.
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 TASK 73-25-00-810-862
 Failure of the HP Fuel SOV Closed Discrete Output on the EIU 2
 1. Possible Causes
_______________
 - CONT-ZONE TEMPERATURE (8HK)

 - EIU-2 (1KS2)

 - wiring from the EIU-2 (1KS2) to the zone temperature controller (8HK)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 21-63-34-000-001 Removal of the Zone Controller (8HK)
 AMM 21-63-34-400-001 Installation of the Zone Controller (8HK)
 AMM 73-25-34-000-040 Removal of the Engine Interface Unit (EIU)