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 TASK 73-25-00-810-870

 Failure of the T/R Inhibition System on Engine 2
 1. Possible Causes
_______________
 - EIU-2 (1KS2)

 - RELAY-THRUST REV INHIBITION, ENG2 (14KS2)

 - wiring from the EIU-2 (1KS2) to the engine 2 thrust reverser inhibition relay (14KS2)

 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 73-25/16
 ASM 73-25/16

 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 14KS2 RELAY CIRCUIT OR EIU 2:
 - replace the RELAY-THRUST REV INHIBITION, ENG2 (14KS2) (Ref. ASM 73-25/16) and (Ref. ASM 73-25/16).
 (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 engine 2 thrust reverser inhibition relay (14KS2) pin AB/10A to pin X of the relay (Ref. ASM 73-25/16) and (Ref. ASM 73-25/16).
 B. Do the test given in Para. 3.A.
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 TASK 73-25-00-810-871
 Disagree between Data Received from the LGCIU 1
 1. Possible Causes
_______________
 - EIU-1 (1KS1)

 - LGCIU-1 (5GA1)

 - wiring from the pins AA/5D, 5E of the EIU-1 (1KS1) to the pins AB/3G, 3K of the LGCIU 1 (5GA1)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
 AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
 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) ASM 73-25/16
 3. Fault Confirmation
__________________
 A. Not applicable.
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CHECK LGCIU 1 L/G COMP SIGNALS (DISAGREE):
 - replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
 (1) If the fault continues:

 - replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).

 (2) If the fault continues:

 - do a check and repair the wiring from the pins AA/5D, 5E of the EIU-1 (1KS1) to the pins AB/3G, 3K of the LGCIU 1 (5GA1) (Ref. ASM 73-25/16).
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 B. Test
 (1) During the subsequent engine start make sure that:

 - no ECAM warning or/and amber crosses do not come into view on the ECAM

 - the engine idle must not be high

 (2) After a subsequent flight make sure that the maintenance message is no more present.

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