Loss of the Oil Temperature Indication on Engine 1

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1. Possible Causes
· THERMOCOUPLE SCAVENGE-OIL TEMPERATURE ( 4004EN )
· EIU-1 ( 1KS1 )
· wiring from the EIU 1 (1KS1) to the thermocouple (4004EN)
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 71-00-00-710-012 Test No.3 : Idle Leak Check
Ref. AMM 73-25-34-000-041 Removal of the Engine Interface Unit (EIU)
Ref. AMM 73-25-34-400-041 Installation of the Engine Interface Unit (EIU)
Ref. AMM 73-25-34-710-042 Operational Test of the EIU with the CFDS
Ref. AMM 79-32-16-000-010 Removal of the Scavenge Oil Temperature Thermocouple
Ref. AMM 79-32-16-400-010 Installation of the Scavenge Oil Temperature Thermocouple
Ref. ASM 79-36-01
3. Fault Confirmation
Subtask 79-32-00-710-058-A
A. Do the operational test of the EIU 1 with the CFDS Ref. AMM 73-25-34-710-042 .
4. Fault Isolation
Subtask 79-32-00-810-055-A
A. If the test gives no maintenance message:
· replace the THERMOCOUPLE SCAVENGE-OIL TEMPERATURE ( 4004EN ) Ref.
AMM 79-32-16-000-010 and Ref. AMM 79-32-16-400-010 .
(1) If the fault continues:
· replace the EIU-1 ( 1KS1 ) Ref. AMM 73-25-34-000-041 and Ref. AMM 73-25-34-400-041 .
(2) If the fault continues:
· do a check and repair the wiring from the EIU 1 (1KS1) to the thermocouple (4004EN) pin AA/10F
to pin A/1 Ref. ASM 79-36-01
Subtask 79-32-00-710-059-A
B. Test
(1) Do the idle leak check Ref. AMM 71-00-00-710-012 .
(2) Make sure that the temperature indication is shown for engine 1 (no amber XX). [Rev.6 from Feb 2017] 2026.04.04 04:38:28 UTC