DOC AIRBUS | TSM A320FElevated Oil Consumption on Engine 2
1. Possible Causes
CAUTION: FAST OIL LOSS CAN CAUSE OIL IGNITION INCIDENTS AND/OR LARGE DAMAGE TO THE
ENGINE. IF THE CAUSE OF THE ELEVATED OIL CONSUMPTION CANNOT BE CORRECTED,
REMOVE THE ENGINE FROM SERVICE.
· ENGINE-2 ( 1000EM2 )
· De-oiler housing
· De-oiler seal
· De-oiler breather tube
· Blind cap seal
· Air-cooled oil cooler
· Chip detector seals
· No 4 scavenge tube gasket
· Oil scavenge pump
· Fuel cooled oil cooler
· Gearbox seal drains
· No.5 bearing compartment seal
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 71-00-00-710-012 Test No.3 : Idle Leak Check
Ref. AMM 71-00-20-000-040 Removal of the Power Plant
Ref. AMM 71-00-20-400-040 Installation of the Power Plant
Ref. AMM 72-00-00-200-016 Inspection of the HP Compressor
Ref. AMM 72-38-11-000-010 Removal of the Inlet Cone
Ref. AMM 72-50-00-200-010 Inspection of the Turbine Exhaust Case
Ref. AMM 72-50-50-100-010 Cleaning of N°5 Bearing Oil Service Lines, Filter and Oil Jet
Ref. AMM 72-51-41-000-010 Removal of the No.5 Bearing Compartment Cover (PRE SBE 72-0063)
Ref. AMM 72-51-41-000-011 Removal of the No.5 Bearing Compartment Cover (POST SBE
72-0063)
Ref. AMM 72-51-41-000-012 Removal of the Low Pressure (LP) Turbine Shaft Blind Cap
Ref. AMM 72-51-41-400-010 Installation of the No.5 Bearing Compartment Cover
Ref. AMM 72-51-41-400-012 Installation of the Low Pressure (LP) Turbine Shaft Blind Cap
Ref. AMM 72-60-31-000-010 Removal of the Seal Assembly
Ref. AMM 72-60-31-400-010 Installation of the Seal Assembly
Ref. AMM 72-61-49-000-010 Removal of the Gearbox Breather Outlet Duct (GBOD)
REFERENCE DESIGNATION
Ref. AMM 72-61-49-400-010 Installation of the Gearbox Breather Outlet Duct (GBOD)
Ref. AMM 79-00-00-200-011 Inspection of the Magnetic Chip Detectors for Debris
Ref. AMM 79-00-00-200-012 Inspection of the Oil Filters
Ref. AMM 79-20-00-200-010 General Visual Inspection of the Oil Distribution System Components,
Tubes and Joints
Ref. AMM 79-21-42-000-010 Removal of the Air Cooled Oil Cooler
Ref. AMM 79-21-42-400-010 Installation of the Air Cooled Oil Cooler
Ref. AMM 79-21-43-000-010 Removal of the Fuel Cooled Oil Cooler
Ref. AMM 79-21-43-200-010 Inspection of the Fuel Cooled Oil Cooler for Internal Leakage
Ref. AMM 79-21-43-400-010 Installation of the Fuel Cooled Oil Cooler
Ref. AMM 79-22-41-000-010 Removal of the Scavenge Oil Pump
Ref. AMM 79-22-41-400-010 Installation of the Scavenge Oil Pump
Ref. AMM 79-22-45-000-010 Removal of the Magnetic Chip Detector
Ref. AMM 79-22-45-400-010 Installation of the Magnetic Chip Detector
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
Elevated Oil Consumption on Engine 1(2)
Figure 79(IAE)-00-00-991-00100-A / SHEET 1/3 - Elevated Oil Consumption on Engine 1(2) not
printed, as per printing preferences
Figure 79(IAE)-00-00-991-00100-A / SHEET 2/3 - Elevated Oil Consumption on Engine 1(2) not
printed, as per printing preferences
Figure 79(IAE)-00-00-991-00100-A / SHEET 3/3 - Elevated Oil Consumption on Engine 1(2) not
printed, as per printing preferences
3. Fault Confirmation
Subtask 79-00-00-710-120-A
A. Test
(1) Not applicable.
4. Fault Isolation
(Ref. Fig. Elevated Oil Consumption on Engine 1(2))
Subtask 79-00-00-810-103-A
A. Do a check for oil consumption of more than 0.3 US Qts/hr (0.6 pt/hr).
· If oil consumption is not more than 0.3 US Qts/hr (0.6 pt/hr):
continue in service.
· If the oil consumption is more than 0.3 US Qts/hr (0.6 pt/hr):
(1) Do a check of the magnetic chip detectors Ref. AMM 79-00-00-200-011 for contamination:
(a) If there is no contamination of the magnetic chip detector, continue to step (2).
(b) If there is contamination of the magnetic chip detectors:
· Make an analysis of the debris Ref. AMM 79-00-00-200-011 (Examine the debris on the MCD
with a magnifying glass power 05x).
1 If debris are in the limits, continue to step (2).
2 If debris are not in the limits, remove the ENGINE-2 ( 1000EM2 ) from service Ref.
AMM 71-00-20-000-040 Ref. AMM 71-00-20-400-040 .
(2) Do a check of the oil filters Ref. AMM 79-00-00-200-012 for contamination.
(a) If there is no contamination of the oil filters, continue to step (3) Ref. AMM 79-00-00-200-012 .
(Examine the debris from the filters).
1 If debris are in the limits, continue to step (3).
2 If debris are not in the limits, remove the ENGINE-2 ( 1000EM2 ) from service Ref.
AMM 71-00-20-000-040 and Ref. AMM 71-00-20-400-040 .
(3) Do an inspection of the Turbine Exhaust Case (TEC) for signs of leakage from the weep hole Ref.
AMM 72-50-00-200-010 .
(a) If there are signs of oil leakage from the weep hole:
· Remove the ENGINE-2 ( 1000EM2 ) from service Ref. AMM 71-00-20-000-040 and Ref.
AMM 71-00-20-400-040 .
(b) If there are no signs of oil leakage from the weep hole, continue to step (4).
(4) Do a check of the oil system externals for signs of leakage to include gearbox seal drains and engine
cowl at breather exit for wetness Ref. AMM 79-20-00-200-010 .
(a) If there are signs of oil:
· Repair leaks on common sources:
. De-oiler housing Ref. AMM 72-60-31-000-010 and Ref.
AMM 72-60-31-400-010
. De-oiler seal Ref. AMM 72-60-31-000-010 and Ref.
AMM 72-60-31-400-010
. De-oiler breather tube Ref. AMM 72-61-49-000-010 and Ref.
AMM 72-61-49-400-010
. Blind cap seal Ref. AMM 72-51-41-000-012 and Ref.
AMM 72-51-41-400-012
. Air-cooled oil cooler Ref. AMM 79-21-42-000-010 and Ref.
AMM 79-21-42-400-010
. Chip detector seals Ref. AMM 79-22-45-000-010 and Ref.
AMM 79-22-45-400-010
. Loose connections at bifurcation panel
. No 4 scavenge tube gasket Ref. AMM 79-23-51-000-010 and Ref.
AMM 79-23-51-400-010
. Oil scavenge pump Ref. AMM 79-22-41-000-010 and Ref.
AMM 79-22-41-400-010 and SBE 79-0056
. Fuel cooled oil cooler Ref. AMM 79-21-43-000-010 and Ref.
AMM 79-21-43-400-010
. Gearbox seal drains .
· Continue to step (9).
(b) If there is no sign of oil, continue to step (5).
(5) Do a borescope inspection (BSI) for oil in compressor gas path, 2.5 bleed exit, fan exit case or fan
splitter Ref. AMM 72-00-00-200-016 .
(a) If there is oil:
· Remove the ENGINE-2 ( 1000EM2 ) from service Ref. AMM 71-00-20-000-040 and Ref.
AMM 71-00-20-400-040 .
(b) If there is no oil, continue to step (6).
(6) Do an internal check of the LP shaft for signs of oil leakage by removing inlet cone Ref.
AMM 72-38-11-000-010 .
(a) If there is oil leakage
· Replace the LP shaft blind cap seal at No.5 bearing compartment Ref.
AMM 72-51-41-000-012 and Ref. AMM 72-51-41-400-012 .
· Clean No.5 compartment, if necessary Ref. AMM 72-50-50-100-010 .
(b) If there is no oil leakage, continue to step (7).
(7) Do a check of the No.5 bearing compartment.
(a) If the Turbine Exhaust Case (TEC) cover is not externally dry and clean Ref.
AMM 72-50-00-200-010 :
· Replace the No.5 bearing compartment seal Ref. AMM 72-51-41-000-010 Ref.
AMM 72-51-41-000-011 Ref. AMM 72-51-41-000-010 and Ref. AMM 72-51-41-400-010 .
· Examine the No.5 compartment and oil service tubes for coke (SBE 72-0461).
· Clean No.5 bearing compartment, if necessary Ref. AMM 72-50-50-100-010 .
(b) If the TEC cover is externally dry and clean, continue to step (8).
(8) Do an inspection of the fuel cooled oil cooler (FCOC) for internal leakage Ref.
AMM 79-21-43-200-010 .
(9) Do an engine idle leak check Ref. AMM 71-00-00-710-012 , Test No.3 for 10 minutes and do a check
of the oil system, gearbox seal drains and turbine exhaust case Ref. AMM 72-50-00-200-010 for
signs of leakage.
(a) If source of external oil leak is repaired, return the engine to service and monitor oil consumption
on subsequent flights.
1 If oil consumption is in the limits, return the engine to normal service.
2 If oil consumption is not in the limits, remove ENGINE-2 ( 1000EM2 ) from service Ref.
AMM 71-00-20-000-040 and Ref. AMM 71-00-20-400-040 .
(b) If source of external oil leak is not identified, remove the ENGINE-2 ( 1000EM2 ) from service
Ref. AMM 79-21-43-000-010 Ref. AMM 79-21-43-400-010 .
Subtask 79-00-00-710-122-A
B. After the subsequent flight, make sure that the fault does not continue.
Figure 79(IAE)-00-00-991-00200-13-A- / SHEET 1/7 - Smoke from Inlet or Exhaust of Engine 1
Figure 79(IAE)-00-00-991-00200-13-A- / SHEET 2/7 - Smoke from Inlet or Exhaust of Engine 1
Figure 79(IAE)-00-00-991-00200-13-A- / SHEET 3/7 - Smoke from Inlet or Exhaust of Engine 1
Figure 79(IAE)-00-00-991-00200-13-A- / SHEET 4/7 - Smoke from Inlet or Exhaust of Engine 1
Figure 79(IAE)-00-00-991-00200-13-A- / SHEET 5/7 - Smoke from Inlet or Exhaust of Engine 1
Figure 79(IAE)-00-00-991-00200-13-A- / SHEET 6/7 - Smoke from Inlet or Exhaust of Engine 1
Figure 79(IAE)-00-00-991-00200-13-A- / SHEET 7/7 - Smoke from Inlet or Exhaust of Engine 1
Figure 79(IAE)-00-00-991-00300-13-A- / SHEET 1/7 - Smoke from Inlet or Exhaust of Engine 2
Figure 79(IAE)-00-00-991-00300-13-A- / SHEET 2/7 - Smoke from Inlet or Exhaust of Engine 2
Figure 79(IAE)-00-00-991-00300-13-A- / SHEET 3/7 - Smoke from Inlet or Exhaust of Engine 2
Figure 79(IAE)-00-00-991-00300-13-A- / SHEET 4/7 - Smoke from Inlet or Exhaust of Engine 2
Figure 79(IAE)-00-00-991-00300-13-A- / SHEET 5/7 - Smoke from Inlet or Exhaust of Engine 2
Figure 79(IAE)-00-00-991-00300-13-A- / SHEET 6/7 - Smoke from Inlet or Exhaust of Engine 2
Figure 79(IAE)-00-00-991-00300-13-A- / SHEET 7/7 - Smoke from Inlet or Exhaust of Engine 2
Figure 79(IAE)-00-00-991-00100-13-A- / SHEET 1/3 - Elevated Oil Consumption on Engine 1(2)
Figure 79(IAE)-00-00-991-00100-13-A- / SHEET 2/3 - Elevated Oil Consumption on Engine 1(2)
Figure 79(IAE)-00-00-991-00100-13-A- / SHEET 3/3 - Elevated Oil Consumption on Engine 1(2)
79-20 - (IAE) - DISTRIBUTION
79-20-00 - (IAE) - DISTRIBUTION
79-20-00 PB 201 CONF 13 - DISTRIBUTION - FAULT ISOLATION PROCEDURES [Rev.6 from Feb 2017] 2026.04.04 04:38:25 UTC