Loss of the Oil Pressure Indication on Engine 2

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1. Possible Causes
· XMTR-OIL PRESS ( 4003EN )
· pressure pump/filter
· wiring from the oil pressure transmitter (4003EN) to the EIU 2 (1KS2)
· wiring from the circuit breaker 2EN2 to the oil pressure transmitter (4003EN) pin A/1
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 71-00-00-710-046 Test No.2 : Wet Motor Leak Check
Ref. AMM 73-25-34-710-042 Operational Test of the EIU with the CFDS
Ref. AMM 79-20-00-200-010 General Visual Inspection of the Oil Distribution System Components,
Tubes and Joints
Ref. AMM 79-21-41-000-010 Removal of the Oil Pressure Pump and Filter Assembly
Ref. AMM 79-21-41-400-010 Installation of the Oil Pressure Pump and Filter Assembly
Ref. AMM 79-33-15-000-010 Removal of the Oil Pressure Transmitter
Ref. AMM 79-33-15-400-010 Installation of the Oil Pressure Transmitter
Ref. ASM 79-36-01
3. Fault Confirmation
Subtask 79-33-00-865-055-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANEL DESIGNATION FIN LOCATION
121VU ENGINE/ENG2/OIL/PRESS/AND REV
SNSR/CHAN A
2EN2 N42
Subtask 79-33-00-710-080-A
B. Do the operational test of the EIU 2 with the CFDS Ref. AMM 73-25-34-710-042 .
4. Fault Isolation
Subtask 79-33-00-810-067-A
A. If the test gives no maintenance message:
· do the general visual inspection of the oil distribution system components, tubes and joints Ref.
AMM 79-20-00-200-010 .
(1) If the fault continues:
· replace the XMTR-OIL PRESS ( 4003EN ) Ref. AMM 79-33-15-000-010 and Ref.
AMM 79-33-15-400-010 .
(2) If the fault continues:
· replace the pressure pump/filter Ref. AMM 79-21-41-000-010 and Ref. AMM 79-21-41-400-010 .
(3) If the fault continues:
· do a check and repair the:
. wiring from the oil pressure transmitter (4003EN) to the EIU 2 (1KS2) pins A/4, 3
to pins AA/8D, 8B
. wiring from the circuit breaker 2EN2 to the oil pressure transmitter (4003EN) pin
A/1 Ref. ASM 79-36-01.
Subtask 79-33-00-710-081-A
B. Test
(1) Do the wet motor leak check Ref. AMM 71-00-00-710-046 .
(2) Make sure that the oil pressure indication is shown (no amber XX). [Rev.6 from Feb 2017] 2026.04.04 04:38:30 UTC