W DOC AIRBUS | TSM A320F

FAULT Light of the BLUE ELEC PUMP P/BSW is ON at the same Time as the FAULT Light of the ENG1 PUMP P/BSW

TASK 29-12-00-810-815-A
FAULT Light of the BLUE ELEC PUMP P/BSW is ON at the same Time as the FAULT Light of the ENG1 PUMP P/BSW

1. Possible Causes
  • EIU-1 [1KS1]
  • RELAY-OIL LOW PRESS AND GROUND, ENG 1 [10KS1]
  • wiring
  • RELAY-OIL LOW PRESS AND GROUND, ENG 1 [11KS1]
  • SW-LOW OIL PRESS [4000EN]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 24-41-00-861-002
Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002
De-energize the Aircraft Electrical Circuits Supplied from the External Power
ASM 732508
ASM 732509
AMM 73-25-34-000-040
Removal of the Engine Interface Unit (EIU)
AMM 73-25-34-400-040
Installation of the Engine Interface Unit (EIU)
AMM 73-25-34-710-040
Operational Test of the Engine Interface Unit
AMM 73-25-34-710-043
Operational Test of the Engine Interface Unit
AMM 79-34-15-000-040
Removal of the Low Oil Pressure Switch
AMM 79-34-15-000-041
Removal of the Low Oil Pressure Switch
AMM 79-34-15-400-040
Installation of the Low Oil Pressure Switch
AMM 79-34-15-400-041
Installation of the Low Oil Pressure Switch
3. Fault Confirmation
Subtask 29-12-00-865-061-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUHYD/HYD PWR/B WARN/& CTL2702GJC12
121VUHYDRAULIC/G HYD/PUMP ENG1/MONG1702GKR34
Subtask 29-12-00-860-067-A
B. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
   (2) On the overhead panel 40VU, look for the FAULT lights of the BLUE ELEC PUMP P/BSW (2704GJ) and the GREEN/ENG 1 PUMP P/BSW (1705GK).
4. Fault Isolation
Subtask 29-12-00-810-069-A ** ON A/C NOT FOR ALL
A. If the Fault Confirmation gives:

  • The FAULT light of the BLUE ELEC PUMP P/BSW (Panel 40VU) is ON at the same time with the FAULT light of the GREEN ENG 1 PUMP P/BSW (Panel 40VU):

   (1) Do a check for continuity between the:
EIU-1 [1KS1] connector AB/9D and the RELAY-OIL LOW PRESS AND GROUND, ENG 1 [10KS1] connector A/X ASM 732509.
     (a) If there is no continuity:
  • Do a check and repair the wiring between the:
    EIU-1 [1KS1] connector AB/9D and the RELAY-OIL LOW PRESS AND GROUND, ENG 1 [10KS1] connector A/X ASM 732509.
   (2) If the fault continues:
     (a) Do a check for continuity between the:
EIU-1 [1KS1] connector AB/9D and the RELAY-OIL LOW PRESS AND GROUND, ENG 1 [11KS1] connector A/X ASM 732509.
     (b) If there is no continuity:
  • Do a check and repair the wiring between the:
    EIU-1 [1KS1] connector AB/9D and the RELAY-OIL LOW PRESS AND GROUND, ENG 1 [11KS1] connector A/X ASM 732509.
   (3) If the fault continues:
     (a) Do the operational test of the EIU-1 [1KS1] AMM 73-25-34-710-040.
     (b) If necessary, replace the EIU-1 [1KS1] AMM 73-25-34-000-040 and AMM 73-25-34-400-040.
   (4) If the fault continues:
     (a) Do a check for continuity between the:
SW-LOW OIL PRESS [4000EN] connector A/3 and the EIU-1 [1KS1] connector AA/7A ASM 732508.
     (b) If there is no continuity:
  • Do a check and repair the wiring between the:
    SW-LOW OIL PRESS [4000EN] connector A/3 and the EIU-1 [1KS1] connector AA/7A ASM 732508.
   (5) If the fault continues:
     (a) Do a check for continuity between the:
SW-LOW OIL PRESS [4000EN] connector A/2 and the connector A/3 ASM 732508.
     (b) If there is no continuity:
Subtask 29-12-00-810-069-B ** ON A/C NOT FOR ALL
A. If the Fault Confirmation gives:

  • The FAULT light of the BLUE ELEC PUMP P/BSW (Panel 40VU) is ON at the same time with the FAULT light of the GREEN ENG 1 PUMP P/BSW (Panel 40VU):

   (1) Do a check for continuity between the:
EIU-1 [1KS1] connector AB/9D and the RELAY-OIL LOW PRESS AND GROUND, ENG 1 [10KS1] connector A/X ASM 732509.
     (a) If there is no continuity:
  • Do a check and repair the wiring between the:
    EIU-1 [1KS1] connector AB/9D and the RELAY-OIL LOW PRESS AND GROUND, ENG 1 [10KS1] connector A/X ASM 732509.
   (2) If the fault continues:
     (a) Do a check for continuity between the:
EIU-1 [1KS1] connector AB/9D and the RELAY-OIL LOW PRESS AND GROUND, ENG 1 [11KS1] connector A/X ASM 732509.
     (b) If there is no continuity:
  • Do a check and repair the wiring between the:
    EIU-1 [1KS1] connector AB/9D and the RELAY-OIL LOW PRESS AND GROUND, ENG 1 [11KS1] connector A/X ASM 732509.
   (3) If the fault continues:
     (a) Do the operational test of the EIU-1 [1KS1] AMM 73-25-34-710-043.
     (b) If necessary, replace the EIU-1 [1KS1] AMM 73-25-34-000-040 and AMM 73-25-34-400-040.
   (4) If the fault continues:
     (a) Do a check for continuity between the:
SW-LOW OIL PRESS [4000EN] connector A/3 and the EIU-1 [1KS1] connector AA/7A ASM 732508.
     (b) If there is no continuity:
  • Do a check and repair the wiring between the:
    SW-LOW OIL PRESS [4000EN] connector A/3 and the EIU-1 [1KS1] connector AA/7A ASM 732508.
   (5) If the fault continues:
     (a) Do a check for continuity between the:
SW-LOW OIL PRESS [4000EN] connector A/2 and the connector A/3 ASM 732508.
     (b) If there is no continuity:
Subtask 29-12-00-710-068-A
B. Do the procedure as given in Para. 3. B. to make sure that the operation of the system is correct (No FAULT lights ON).
5. Close-up
Subtask 29-12-00-860-068-A
A. De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.
[Rev.8 from Aug 2018] 2026.04.04 04:29:23 UTC
"WTRUIB" 2025