No. 4 Bearing Scavenge Valve Position Indicator Stuck Open on Engine 2

---

1. Possible Causes
· INDICATOR-POS, NO.4 SCAVENGE VALVE ( 4006EN )
· EIU-2 ( 1KS2 )
· wiring from the EIU2 (1KS2) to the No. 4 bearing scavenge valve position indicator (4006EN)
· oil tubes from the No. 4 bearing compartment to the No. 4 bearing scavenge valve position indicator
(4006EN)
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External
Power
Ref. AMM 31-60-00-860-002 EIS Stop Procedure
Ref. AMM 71-00-00-710-013 Test No.11 : High Power Assurance Test
Ref. AMM 71-13-00-410-010 Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
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 79-22-49-200-010 Inspection of the Scavenge Oil Tubes
Ref. AMM 79-23-51-000-010 Removal of the No. 4 Bearing Compartment Scavenge Valve
Ref. AMM 79-23-51-400-010 Installation of the No. 4 Bearing Compartment Scavenge Valve
Ref. ASM 79-36-01
3. Fault Confirmation
Subtask 79-20-00-710-080-A
A. Test
(1) Do the test No. 11: High Power Assurance Test Ref. AMM 71-00-00-710-013 .
4. Fault Isolation
Subtask 79-20-00-810-065-A
A. If the test gives the maintenance message PIPES AND HARNESS OR SCAV VLV STUCK OPEN 2:
· replace the INDICATOR-POS, NO.4 SCAVENGE VALVE ( 4006EN ) Ref. AMM 79-23-51-000-010
and Ref. AMM 79-23-51-400-010 .
(1) If the fault continues:
· replace the EIU-2 ( 1KS2 ) 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 EIU2 (1KS2) to the No. 4 bearing scavenge valve
position indicator (4006EN)
· pins AA/7C to pins A/3 Ref. ASM 79-36-01.
(3) If the fault continues:
· examine and repair as necessary the oil tubes from the No. 4 bearing compartment to the No. 4
bearing scavenge valve position indicator (4006EN) Ref. AMM 79-22-49-200-010 .
Subtask 79-20-00-710-081-A
B. Do the test given in Para. 3.
5. Close-up
Subtask 79-20-00-860-077-A
A. Put the aircraft back to its initial 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) On the panel 50VU, push the ENG FADEC GND PWR 2 pushbutton switch.
(3) De-energize the aircraft electrical circuits Ref. AMM 24-41-00-862-002 .
(4) Make sure that the fan cowls 447AL and 448AR are closed Ref. AMM 71-13-00-410-010 .
Figure 79(IAE)-20-00-991-00100-13-A- / SHEET 1/1 - ACOC Modulating Valve
Figure 79(IAE)-20-00-991-00200-13-A- / SHEET 1/1 - IDG Oil-Temperature Thermocouple on Engine 1 (2)
Figure 79(IAE)-20-00-991-00400-13-A- / SHEET 1/1 - IDG Oil-Temperature Thermocouple on Engine 1 (2)
79-30 - (IAE) - INDICATING
79-30-00 - (IAE) - INDICATING
79-30-00 PB 201 CONF 13 - INDICATING - FAULT ISOLATION PROCEDURES [Rev.6 from Feb 2017] 2026.04.04 04:38:27 UTC