DOC AIRBUS | AMM A320FGeneral Visual Inspection of the Oil Distribution System Components, Tubes and Joints [IAE]
TASK 79-20-00-200-010-A
General Visual Inspection of the Oil Distribution System Components, Tubes and Joints
This task gives the procedure for a general visual inspection of the engine oil distribution system components, tubes and joints.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 79-20-00-941-050-A ** ON A/C NOT FOR ALL
Subtask 79-20-00-210-050-A ** ON A/C NOT FOR ALL
Subtask 79-20-00-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:00:45 UTC
General Visual Inspection of the Oil Distribution System Components, Tubes and Joints
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
WARNING:
DO NOT LET ENGINE OIL STAY ON YOUR SKIN FOR A LONG TIME. FLUSH THE OIL FROM YOUR SKIN WITH WATER. THE OIL IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY.
1. Reason for the JobThis task gives the procedure for a general visual inspection of the engine oil distribution system components, tubes and joints.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | LIGHT SOURCE - INSPECTION |
| No specific | AR | MIRROR - INSPECTION |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-52-11-918-010-A | Specified Types of Damage |
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-00-410-010-A | Closing of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 78-30-00-040-012-A | Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance |
| TASK 78-30-00-440-012-A | Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance |
| TASK 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
| TASK 78-32-00-410-010-A | Closing of the Thrust Reverser Halves |
| TASK 79-21-42-000-010-A | Removal of the Air Cooled Oil Cooler (ACOC) |
| TASK 79-21-42-400-010-A | Installation of the Air Cooled Oil Cooler (ACOC) |
| TASK 79-21-43-000-010-B | Removal of the Fuel Cooled Oil Cooler |
| TASK 79-21-43-400-010-B | Installation of the Fuel Cooled Oil Cooler |
| TASK 79-21-48-200-010-A | Inspection of the Pressure Oil Tubes on the External Gearbox |
| TASK 79-21-49-200-010-A | Inspection of the Pressure Oil Tubes |
| TASK 79-22-48-200-010-A | Inspection of the Scavenge Oil Tubes on the External Gearbox |
| TASK 79-22-49-200-010-A | Inspection of the Scavenge Oil Tubes |
| TASK 79-21-41-000-010-A | Removal of the Oil Pressure Pump and Filter Assembly (for corrective action) |
| TASK 79-21-41-400-010-A | Installation of the Oil Pressure Pump and Filter Assembly (for corrective action) |
| TASK 79-21-42-000-010-A | Removal of the Air Cooled Oil Cooler (ACOC) (for corrective action) |
| TASK 79-21-42-400-010-A | Installation of the Air Cooled Oil Cooler (ACOC) (for corrective action) |
| TASK 79-21-43-000-010-B | Removal of the Fuel Cooled Oil Cooler (for corrective action) |
| TASK 79-21-43-400-010-B | Installation of the Fuel Cooled Oil Cooler (for corrective action) |
| TASK 79-22-41-000-010-A | Removal of the Scavenge Oil Pump (for corrective action) |
| TASK 79-22-41-400-010-A | Installation of the Scavenge Oil Pump (for corrective action) |
| TASK 79-22-43-000-010-A | Removal of the Scavenge Oil Filter Assembly (for corrective action) |
| TASK 79-22-43-400-010-A | Installation of the Scavenge Oil Filter Assembly (for corrective action) |
| TASK 79-22-44-000-010-A | Removal of the Scavenge Oil Filter Element (for corrective action) |
| TASK 79-22-44-400-010-A | Installation of the Scavenge Oil Filter Element (for corrective action) |
| TASK 79-22-45-000-010-A | Removal of the Magnetic Chip Detector (for corrective action) |
| TASK 79-22-45-000-011-A | Removal of the Magnetic Chip Detector Housing (for corrective action) |
| TASK 79-22-45-400-010-A | Installation of the Magnetic Chip Detector (for corrective action) |
| TASK 79-22-45-400-011-A | Installation of the Magnetic Chip Detector Housing (for corrective action) |
| TASK 79-23-51-000-010-A | Removal of the No. 4 Bearing Compartment Scavenge Valve (for corrective action) |
| TASK 79-23-51-400-010-A | Installation of the No. 4 Bearing Compartment Scavenge Valve (for corrective action) |
Subtask 79-20-00-941-050-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 79-20-00-010-050-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
B. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(3) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 79-20-00-040-050-A ** ON A/C NOT FOR ALL Subtask 79-20-00-010-051-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(3) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 79-20-00-210-050-A ** ON A/C NOT FOR ALL
A. Examination of the oil on the external gearbox:
(1) Examine the oil pressure tubes on the external gearbox (Ref. AMM TASK 79-21-48-200-010).
(2) Examine the oil scavenge tubes on the external gearbox (Ref. AMM TASK 79-22-48-200-010).
Subtask 79-20-00-210-051-A ** ON A/C NOT FOR ALL (1) Examine the oil pressure tubes on the external gearbox (Ref. AMM TASK 79-21-48-200-010).
(2) Examine the oil scavenge tubes on the external gearbox (Ref. AMM TASK 79-22-48-200-010).
B. Examination of the oil on the engine:
(1) Examine the oil pressure tubes on the engine (Ref. AMM TASK 79-21-49-200-010).
(2) Examine the oil scavenge tubes on the engine (Ref. AMM TASK 79-22-49-200-010).
Subtask 79-20-00-210-052-A ** ON A/C NOT FOR ALL (1) Examine the oil pressure tubes on the engine (Ref. AMM TASK 79-21-49-200-010).
(2) Examine the oil scavenge tubes on the engine (Ref. AMM TASK 79-22-49-200-010).
C. Examine the Air Cooled Oil Cooler (ACOC). Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION, if necessary
(1) Examine the ACOC for security of attachment.
(2) If loose attachment is found, replace the ACOC attachment bolts as necessary (Ref. AMM TASK 79-21-42-000-010) and (Ref. AMM TASK 79-21-42-400-010).
(3) Examine the ACOC tube connections for leaks.
(4) If leaks are found, replace the tube connection packings or the ACOC as necessary (Ref. AMM TASK 79-21-42-000-010) and (Ref. AMM TASK 79-21-42-400-010).
(5) Examine the ACOC for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the ACOC (Ref. AMM TASK 79-21-42-000-010) and (Ref. AMM TASK 79-21-42-400-010).
(7) Examine the ACOC for signs of wetting or leakage.
(8) If oil is only wetting (characterized by a moist surface without drip formation) the surface of the ACOC, the unit can continue to operate for 10 cycles before it must be replaced (Ref. AMM TASK 79-21-42-000-010) and (Ref. AMM TASK 79-21-42-400-010).
(9) If the oil is leaking (characterized by the formation of a drop or expectancy of a drop that will detach during engine operation), replace the unit (Ref. AMM TASK 79-21-42-000-010) and (Ref. AMM TASK 79-21-42-400-010).
Subtask 79-20-00-210-053-B ** ON A/C NOT FOR ALL (1) Examine the ACOC for security of attachment.
(2) If loose attachment is found, replace the ACOC attachment bolts as necessary (Ref. AMM TASK 79-21-42-000-010) and (Ref. AMM TASK 79-21-42-400-010).
(3) Examine the ACOC tube connections for leaks.
(4) If leaks are found, replace the tube connection packings or the ACOC as necessary (Ref. AMM TASK 79-21-42-000-010) and (Ref. AMM TASK 79-21-42-400-010).
(5) Examine the ACOC for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the ACOC (Ref. AMM TASK 79-21-42-000-010) and (Ref. AMM TASK 79-21-42-400-010).
(7) Examine the ACOC for signs of wetting or leakage.
(8) If oil is only wetting (characterized by a moist surface without drip formation) the surface of the ACOC, the unit can continue to operate for 10 cycles before it must be replaced (Ref. AMM TASK 79-21-42-000-010) and (Ref. AMM TASK 79-21-42-400-010).
(9) If the oil is leaking (characterized by the formation of a drop or expectancy of a drop that will detach during engine operation), replace the unit (Ref. AMM TASK 79-21-42-000-010) and (Ref. AMM TASK 79-21-42-400-010).
D. Examine the Fuel Cooled Oil Cooler (FCOC). Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION, if necessary
General Visual Inspection of the Oil Distribution System Components, Tubes and Joints ** ON A/C NOT FOR ALL
(1) Examine the FCOC for security of attachment.
(2) If loose attachment is found, replace the FCOC attachment bolts as necessary (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(3) Examine the FCOC tube connections for leaks.
(4) If leaks are found, replace the tube connection packings or the FCOC as necessary (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(5) Examine the FCOC for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the FCOC (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(7) Examine the FCOC atmospheric vent hole for signs of oil or fuel wetting or leaking.
(9) If the fluid is leaking (characterized by the formation of a drop or expectancy of a drop that will detach during engine operation), replace the unit (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
Subtask 79-20-00-210-054-A ** ON A/C NOT FOR ALL General Visual Inspection of the Oil Distribution System Components, Tubes and Joints ** ON A/C NOT FOR ALL (2) If loose attachment is found, replace the FCOC attachment bolts as necessary (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(3) Examine the FCOC tube connections for leaks.
(4) If leaks are found, replace the tube connection packings or the FCOC as necessary (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(5) Examine the FCOC for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the FCOC (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(7) Examine the FCOC atmospheric vent hole for signs of oil or fuel wetting or leaking.
NOTE: Oil or fuel in this location is indicative of either internal cracking between the fuel and oil seals or degradation of the seals.
(8) If the fluid is only wetting (characterized by a moist surface without drip formation) the surface of the FCOC, the unit can continue operation for 10 cycles before replacement (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010). (9) If the fluid is leaking (characterized by the formation of a drop or expectancy of a drop that will detach during engine operation), replace the unit (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
E. Examine the oil pressure pump and filter assembly. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION if necessary
(1) Examine the pump and filter assembly for security of attachment.
(2) If loose attachment is found, replace the pump attachment nuts as necessary (Ref. AMM TASK 79-21-41-000-010) and (Ref. AMM TASK 79-21-41-400-010).
(3) Examine the pump mounting flange and the tube connection for leaks.
(4) If leaks are found, replace the packings as necessary (Ref. AMM TASK 79-21-41-000-010) and (Ref. AMM TASK 79-21-41-400-010).
(5) Examine the pump and filter assembly for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the pump and filter assembly (Ref. AMM TASK 79-21-41-000-010) and (Ref. AMM TASK 79-21-41-400-010).
Subtask 79-20-00-210-055-A ** ON A/C NOT FOR ALL (1) Examine the pump and filter assembly for security of attachment.
(2) If loose attachment is found, replace the pump attachment nuts as necessary (Ref. AMM TASK 79-21-41-000-010) and (Ref. AMM TASK 79-21-41-400-010).
(3) Examine the pump mounting flange and the tube connection for leaks.
(4) If leaks are found, replace the packings as necessary (Ref. AMM TASK 79-21-41-000-010) and (Ref. AMM TASK 79-21-41-400-010).
(5) Examine the pump and filter assembly for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the pump and filter assembly (Ref. AMM TASK 79-21-41-000-010) and (Ref. AMM TASK 79-21-41-400-010).
F. Examine the No.4 bearing compartment scavenge valve. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION, if necessary
(1) Examine scavenge valve for security of attachment.
(2) If loose attachment is found, replace the scavenge valve attachment bolts (Ref. AMM TASK 79-23-51-000-010) and (Ref. AMM TASK 79-23-51-400-010).
(3) Examine the scavenge valve and the vent tube connection for leaks.
(4) If leaks are found, replace the packing or do a check on the tube connection for loss of torque, as necessary (Ref. AMM TASK 79-23-51-000-010) and (Ref. AMM TASK 79-23-51-400-010).
(5) Examine the scavenge valve for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the scavenge valve (Ref. AMM TASK 79-23-51-000-010) and (Ref. AMM TASK 79-23-51-400-010).
Subtask 79-20-00-210-056-A ** ON A/C NOT FOR ALL (1) Examine scavenge valve for security of attachment.
(2) If loose attachment is found, replace the scavenge valve attachment bolts (Ref. AMM TASK 79-23-51-000-010) and (Ref. AMM TASK 79-23-51-400-010).
(3) Examine the scavenge valve and the vent tube connection for leaks.
(4) If leaks are found, replace the packing or do a check on the tube connection for loss of torque, as necessary (Ref. AMM TASK 79-23-51-000-010) and (Ref. AMM TASK 79-23-51-400-010).
(5) Examine the scavenge valve for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the scavenge valve (Ref. AMM TASK 79-23-51-000-010) and (Ref. AMM TASK 79-23-51-400-010).
G. Examine the scavenge oil pump. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION if necessary
(1) Examine the scavenge pump for security of attachment.
(2) If loose attachment is found, replace the pump attachment nuts as necessary (Ref. AMM TASK 79-22-41-000-010) and (Ref. AMM TASK 79-22-41-400-010).
(3) Examine the scavenge pump mounting flange and the tube connections for leaks.
(4) If leaks are found, replace the packings as necessary (Ref. AMM TASK 79-22-41-000-010) and (Ref. AMM TASK 79-22-41-400-010).
(5) Examine the scavenge pump for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the scavenge pump (Ref. AMM TASK 79-22-41-000-010) and (Ref. AMM TASK 79-22-41-400-010).
Subtask 79-20-00-210-057-A ** ON A/C NOT FOR ALL (1) Examine the scavenge pump for security of attachment.
(2) If loose attachment is found, replace the pump attachment nuts as necessary (Ref. AMM TASK 79-22-41-000-010) and (Ref. AMM TASK 79-22-41-400-010).
(3) Examine the scavenge pump mounting flange and the tube connections for leaks.
(4) If leaks are found, replace the packings as necessary (Ref. AMM TASK 79-22-41-000-010) and (Ref. AMM TASK 79-22-41-400-010).
(5) Examine the scavenge pump for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the scavenge pump (Ref. AMM TASK 79-22-41-000-010) and (Ref. AMM TASK 79-22-41-400-010).
H. Examine the scavenge oil filter assembly. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION, if necessary
(1) Examine the scavenge filter assembly for security of attachment.
(2) If loose attachment is found, replace the filter assembly attachment bolts as necessary (Ref. AMM TASK 79-22-43-000-010) and (Ref. AMM TASK 79-22-43-400-010).
(3) Examine the filter housing and the tube connections for leaks.
(4) If leaks are found, replace the packings as necessary (Ref. AMM TASK 79-22-43-000-010) (Ref. AMM TASK 79-22-43-400-010), (Ref. AMM TASK 79-22-44-000-010) and (Ref. AMM TASK 79-22-44-400-010).
(5) Examine the scavenge filter assembly for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the scavenge filter assembly (Ref. AMM TASK 79-22-43-000-010) and (Ref. AMM TASK 79-22-43-400-010).
Subtask 79-20-00-210-058-A ** ON A/C NOT FOR ALL (1) Examine the scavenge filter assembly for security of attachment.
(2) If loose attachment is found, replace the filter assembly attachment bolts as necessary (Ref. AMM TASK 79-22-43-000-010) and (Ref. AMM TASK 79-22-43-400-010).
(3) Examine the filter housing and the tube connections for leaks.
(4) If leaks are found, replace the packings as necessary (Ref. AMM TASK 79-22-43-000-010) (Ref. AMM TASK 79-22-43-400-010), (Ref. AMM TASK 79-22-44-000-010) and (Ref. AMM TASK 79-22-44-400-010).
(5) Examine the scavenge filter assembly for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found, replace the scavenge filter assembly (Ref. AMM TASK 79-22-43-000-010) and (Ref. AMM TASK 79-22-43-400-010).
I. Examine the Magnetic Chip Detectors (MCD) and MCD housings. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION, if necessary
(1) Examine the MCDs and the MCD housings for leaks.
(2) If leaks are found, replace the seal rings as necessary (Ref. AMM TASK 79-22-45-000-010) (Ref. AMM TASK 79-22-45-400-010), (Ref. AMM TASK 79-22-45-000-011) and (Ref. AMM TASK 79-22-45-400-011).
5. Close-up(1) Examine the MCDs and the MCD housings for leaks.
(2) If leaks are found, replace the seal rings as necessary (Ref. AMM TASK 79-22-45-000-010) (Ref. AMM TASK 79-22-45-400-010), (Ref. AMM TASK 79-22-45-000-011) and (Ref. AMM TASK 79-22-45-400-011).
Subtask 79-20-00-410-050-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 79-20-00-440-050-A ** ON A/C NOT FOR ALL Subtask 79-20-00-410-051-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.