DOC AIRBUS | TSM A320FLoss of All Oil Indications on Engine 1
1. Possible Causes
· EIU-1 ( 1KS1 )
· wiring from the EIU 1 (1KS1) pins AB/5H, 5K to the first terminal block
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power
Ref. AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External
Power
Ref. AMM 31-60-00-860-001 EIS Start Procedure
Ref. AMM 31-60-00-860-002 EIS Stop Procedure
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. ASM 79-36-01
3. Fault Confirmation
Subtask 79-30-00-865-050-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANEL DESIGNATION FIN LOCATION
49VU ENGINE/1/FADEC A/AND EIU 1 2KS1 A04
121VU ENGINE/ENG1/OIL/PRESS/AND REV
SNSR/CHAN A
2EN1 N40
121VU ENGINE/ENG1/OIL/QTY 1EN1 N39
121VU ENGINE/ENG1/FADEC B/AND EIU 1 4KS1 R41
Subtask 79-30-00-710-050-A
B. Do the operational test of the EIU 1 with the CFDS Ref. AMM 73-25-34-710-042 .
4. Fault Isolation
Subtask 79-30-00-810-051-A
A. If the test gives no maintenance message:
· replace the EIU-1 ( 1KS1 ) Ref. AMM 73-25-34-000-041 and Ref. AMM 73-25-34-400-041 .
(1) If the fault continues:
· do a check and repair the wiring from the EIU 1 (1KS1) pins AB/5H, 5K to the first terminal block
Ref. ASM 79-36-01.
Subtask 79-30-00-710-051-A
B. Test.
(1) Energize the aircraft electrical circuits
Ref. AMM 24-41-00-861-002 .
(2) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
Ref. AMM 31-60-00-860-001 .
(3) On the ECAM control panel, push the ENG key to get the ENGINE page.
(4) On the ENGINE page, the oil indications are shown for engine 1 (no amber XX).
5. Close-up
Subtask 79-30-00-860-050-A
A. Aircraft Maintenance Configuration.
(1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF
Ref. AMM 31-60-00-860-002 .
(2) De-energize the aircraft electrical circuits
Ref. AMM 24-41-00-862-002 . [Rev.6 from Feb 2017] 2026.04.04 04:38:27 UTC