TASK 73-25-00-810-864
 Failure of the N2 Higher than the Minimum TO Discrete Output on the EIU 2
 1. Possible Causes
_______________
 - CONTROLLER-PACK 2 TEMP (27HH)

 - EIU-2 (1KS2)

 - CONT-AIR COND SYSTEM 2 (57HH)

 - wiring from the EIU-2 (1KS2) to the pack 2 temperature controller (27HH)

 - wiring from the EIU-2 (1KS2) to the pack 2 temperature controller (57HH)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 21-61-34-000-001 Removal of the Pack Controller (7HH, 27HH)
 AMM 21-61-34-000-002 Removal of the Air-Conditioning System Controller
 (47HH, 57HH)
 AMM 21-61-34-400-001 Installation of the Pack Controller (7HH, 27HH)
 AMM 21-61-34-400-002 Installation of the Air-Conditioning System

 Controller (47HH, 57HH)
 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
_______________
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302,
 A. If the test gives the maintenance message CHECK PACK CONT 7HH EIU 2 CIRCUIT:
 - replace the CONTROLLER-PACK 2 TEMP (27HH) (Ref. AMM TASK 21-61-34-000-001) and (Ref. AMM TASK 21-61-34-400-001).
 (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).
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 (2) If the fault continues:

 - do a check and repair the wiring from the EIU-2 (1KS2) to the pack2 temperature controller (27HH) pin AB/1G to pin AA/10B (Ref. ASM 73-25/09).
R **ON A/C 106-149, 303-399, 401-499,
 A. If the test gives the maintenance message CHECK PACK CONT 7HH EIU 2 CIRCUIT:
 NOTE : CONT-PACK (7HH) has been replaced by AIR COND SYS 2 (57HH) due to
____
 a modification of the Air Conditioning System.

 - replace the CONT-AIR COND SYSTEM 2 (57HH) (Ref. AMM TASK 21-61-34-000-002) and (Ref. AMM TASK 21-61-34-400-002).
 (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 pack2 temperature controller (57HH) pin AB/1G to pin AB/3C (Ref. ASM 73-25/09).
 **ON A/C ALL
 B. Do the test given in Para. 3.A.
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 TASK 73-25-00-810-865
 Failure of the Pack Valve Output for Engine 1
 1. Possible Causes
_______________
 - EIU-1 (1KS1)

 - RELAY-ENGINE START (17HB)

 - wiring from the EIU-1 (1KS1) to the engine start relay (17HB)

 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 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 17HB RELAY CIRCUIT OR EIU
　
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