W DOC AIRBUS | TSM A320F

Incorrect Oil Quantity Level on Engine 1

TASK 79-00-00-810-818-A
Incorrect Oil Quantity Level on Engine 1

1. Possible Causes
  • ENGINE-1 [1000EM1]
  • lubrication unit
  • XMTR-OIL QTY [4002EN]
  • wiring
  • wiring between the circuit breaker (1EN1) and the oil quantity transmitter (4002EN)
  • wiring from the oil quantity transmitter (4002EN) to the EIU1 (1KS1)
  • EIU-1 [1KS1]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 71-00-00-000-040
Removal of the Power Plant
AMM 71-00-00-000-042
Removal of the Power Plant
AMM 71-00-00-400-040
Installation of the Power Plant
AMM 71-00-00-400-042
Installation of the Power Plant
AMM 71-00-00-710-006
Minimum Idle Check
AMM 72-31-00-290-001
Inspection of the High Pressure Compressor Rotor Assembly
AMM 72-31-00-290-002
Inspection of the High Pressure Compressor Rotor Assembly
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 79-00-00-210-006
Visual Inspection of the Aft Sump Oil System
AMM 79-00-00-210-007
Visual Inspection of the Aft Sump Oil System
AMM 79-21-10-000-001
Removal of the Lubrication Unit
AMM 79-21-10-000-004
Removal of the Lubrication Unit
AMM 79-21-10-210-004
Check the Forward Sump Scavenge Magnetic Plug and Screen
AMM 79-21-10-400-001
Installation of the Lubrication Unit
AMM 79-21-10-400-004
Installation of the Lubrication Unit
AMM 79-31-15-000-040
Removal of the Oil Quantity Transmitter
AMM 79-31-15-000-041
Removal of the Oil Quantity Transmitter
AMM 79-31-15-400-040
Installation of the Oil Quantity Transmitter
AMM 79-31-15-400-041
Installation of the Oil Quantity Transmitter
ASM 793601
3. Fault Confirmation
Subtask 79-00-00-710-084-A ** ON A/C NOT FOR ALL
A. Test
   (1) Make sure that the oil tank level confirms the oil indication on the lower ECAM display unit.
4. Fault Isolation
Subtask 79-00-00-810-070-A ** ON A/C NOT FOR ALL
A. If the oil tank level confirms the oil indication:
NOTE: Refer to CFM SB 79-0001 covering HTS Oil coking issues. Trend instructions to monitor oil pressure trend and implement Inspection and Cleaning procedures if necessary.
   (1) Do a minimum idle check to make sure there are no leaks AMM 71-00-00-710-006.
   (2) Do a check of the magnetic chip detector for abnormal debris AMM 79-21-10-210-004.
   (3) Do a check of the oil tank, lubrication unit, external oil supply and scavenge lines, for cracks/leaks.
     (a) Do a check of the Aft Sump Oil System for leakage AMM 79-00-00-210-007.
   (4) Do a check for heavy oil discharge in the center vent tube.
     (a) If confirmed:
   (5) Do a check to see if the flame arrestor is clogged.
     (a) If confirmed:
  • Clean or replace it.
   (6) Remove TGB/AGB drain plug and do a check for abnormal oil quantity. If greater than one quart:
   (7) Do a borescope inspection of the high pressure compressor stage 1 and 2 to see if they are covered with oil AMM 72-31-00-290-001.
     (a) If there is oil:
   (8) Do an inspection of the fan blades and booster stage 1 at 6 o'clock to see if they are covered with oil.
     (a) If there is oil:
   (9) Do an inspection of the frame struts and aft side of stage 4 low pressure blades to see if they are covered with oil.
     (a) If there is oil:
Subtask 79-00-00-810-071-A ** ON A/C NOT FOR ALL
B. If the oil tank level does not confirm the oil quantity:
   (1) If the fault continues:
  • Do a check and repair the wiring from the oil quantity transmitter (4002EN) to the SDAC-1 (1WV1), SDAC-2 (1WV2) and EIU1 (1KS1).
Subtask 79-00-00-810-070-B ** ON A/C NOT FOR ALL
C. If the oil tank level confirms the oil indication:
NOTE: Refer to CFM SB 79-0001 covering HTS Oil coking issues. Trend instructions to monitor oil pressure trend and implement Inspection and Cleaning procedures if necessary.
   (1) Do a minimum idle check to make sure there are no leaks AMM 71-00-00-710-006.
   (2) Do a check of the magnetic chip detector for abnormal debris.
   (3) Do a check of the oil tank, lubrication unit, external oil supply and scavenge lines, for cracks/leaks.
     (a) Do a check of the Aft Sump Oil System for leakage AMM 79-00-00-210-006.
   (4) Do a check for heavy oil discharge in the center vent tube.
     (a) If confirmed:
   (5) Do a check to see if the flame arrestor is clogged.
     (a) If confirmed:
  • Clean or replace it.
   (6) Remove TGB/AGB drain plug and do a check for abnormal oil quantity. If greater than one quart:
   (7) Do a borescope inspection of the high pressure compressor stage 1 and 2 to see if they are covered with oil AMM 72-31-00-290-002.
     (a) If there is oil:
   (8) Do an inspection of the fan blades and booster stage 1 at 6 o'clock to see if they are covered with oil.
     (a) If there is oil:
   (9) Do an inspection of the frame struts and aft side of stage 4 low pressure blades to see if they are covered with oil.
     (a) If there is oil:
Subtask 79-00-00-810-071-B ** ON A/C NOT FOR ALL
D. If the oil tank level does not confirm the oil quantity:
   (1) If the fault continues:
  • Do a check and repair the wiring from the oil quantity transmitter (4002EN) to the SDAC-1 (1WV1), SDAC-2 (1WV2) and EIU1 (1KS1).
Subtask 79-00-00-810-072-A ** ON A/C NOT FOR ALL
E. If there are amber XX at the oil quantity indication location on the lower ECAM DU:
  • do a check for 28VDC at the oil quantity transmitter (4002EN).
   (1) If there is no 28VDC:
  • do a check of the wiring between the circuit breaker (1EN1) and the oil quantity transmitter (4002EN) ASM 793601.
   (2) If there is 28VDC:
  • do a check and repair the wiring from the oil quantity transmitter (4002EN) to the EIU1 (1KS1) pins AA/3, 4 to pins AA/8F, 8H ASM 793601.
     (a) If the fault continues:
Subtask 79-00-00-710-085-A ** ON A/C NOT FOR ALL
F. Do a minimum idle check AMM 71-00-00-710-006.
[Rev.8 from Aug 2018] 2026.04.04 04:38:21 UTC
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