DOC AIRBUS | AMM A320FCleaning of the Aft Sump Oil Scavenge Tube [CFMB]
TASK 72-56-00-100-005-A
Cleaning of the Aft Sump Oil Scavenge Tube
Use this procedure to clean the aft sump oil scavenge tube where it goes through the No. 7 turbine frame strut, when you suspect signs of coking in this oil scavenge tube, after an air flow check of the aft sump oil scavenge circuit.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 72-56-00-941-063-A ** ON A/C NOT FOR ALL
Subtask 72-56-00-020-065-A ** ON A/C NOT FOR ALL
Subtask 72-56-00-410-071-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:43:31 UTC
Cleaning of the Aft Sump Oil Scavenge Tube
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobUse this procedure to clean the aft sump oil scavenge tube where it goes through the No. 7 turbine frame strut, when you suspect signs of coking in this oil scavenge tube, after an air flow check of the aft sump oil scavenge circuit.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 6 and 5 m.daN (44.25 and 36.87 lbf.ft )  | |
| No specific | Torque wrench: range to between 12.5 and 10 m.daN (92.18 and 73.75 lbf.ft ) | |
| 856A3492G03 | 2 | WRENCH-COUNTERTORQUE NO 5 BEARING NIPPLE LINE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1041) | isopropyl alcohol |
| (Material No.CP1065) | kerosene |
| (Material No.CP2104) | molykote G rapid |
| (Material No.CP2442) | engine oil |
| (Material No.CP2554) | WD-40 |
| (Material No.CP8001) | lockwire 0.032 in. (0.8 mm) dia. |
| (Material No.CP8006) | safety cable 0.032 in. (0.8 mm) dia. |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 72-56-00-000-002-A | Removal of the Oil Inlet Cover Assembly |
| TASK 72-56-00-400-002-A | Installation of the Oil Inlet Cover Assembly |
Oil Scavenge Tube NutSubtask 72-56-00-941-063-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 72-56-00-010-069-A ** ON A/C NOT FOR ALL 4. Procedure(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 72-56-00-020-065-A ** ON A/C NOT FOR ALL
A. Disconnect the oil scavenge tube
(a) Cut and remove the safetywire between the nipple, at the 6 o'clock position of the No. 5 bearing support nipple, and the coupling nut of the oil scavenge tube.
(b) Install the 856A3492G03 WRENCH-COUNTERTORQUE NO 5 BEARING NIPPLE LINE on the TRF flange:
1 Loosen the four counter wrench bolts.
2 Install the counter wrench on the No. 5 bearing support nipple.
3 Tighten the two support bolts on the turbine rear frame.
4 Do a clockwise rotation on the counter wrench to take up and tighten the four counter wrench bolts.
(c) Disconnect the oil scavenge tube from the nipple of the No. 5 bearing support with the oil scavenge tube nut wrench.
(d) Remove the counter wrench from the TRF flange.
(e) Disengage the guide bushing of the oil scavenge tube from the 5 o'clock boss of the TRF outer case to get access to the oil scavenge tube upper end.
Subtask 72-56-00-290-050-A ** ON A/C NOT FOR ALL CAUTION:
USE TWO WRENCHES TO LOOSEN THE TUBE COUPLING NUTS. USE ONE WRENCH TO HOLD THE NIPPLE FITTING. USE THE OTHER WRENCH TO LOOSEN THE COUPLING NUT. IF THE NIPPLE FITTING TURNS, DAMAGE CAN OCCUR.
(1) Disconnect the aft sump oil scavenge tube from the oil scavenge tube, at the No. 7 TRF strut. CAUTION:
USE THE COUNTER WRENCH TO LOOSEN THE TUBE COUPLING NUTS. OTHER WRENCHES CAN CAUSE DAMAGE TO THE HARDWARE.
(2) Disconnect the oil scavenge tube from the nipple of the No. 5 bearing support. (a) Cut and remove the safetywire between the nipple, at the 6 o'clock position of the No. 5 bearing support nipple, and the coupling nut of the oil scavenge tube.
(b) Install the 856A3492G03 WRENCH-COUNTERTORQUE NO 5 BEARING NIPPLE LINE on the TRF flange:
1 Loosen the four counter wrench bolts.
2 Install the counter wrench on the No. 5 bearing support nipple.
3 Tighten the two support bolts on the turbine rear frame.
4 Do a clockwise rotation on the counter wrench to take up and tighten the four counter wrench bolts.
(c) Disconnect the oil scavenge tube from the nipple of the No. 5 bearing support with the oil scavenge tube nut wrench.
(d) Remove the counter wrench from the TRF flange.
(e) Disengage the guide bushing of the oil scavenge tube from the 5 o'clock boss of the TRF outer case to get access to the oil scavenge tube upper end.
B. Do a visual inspection of the oil scavenge tube with a flexible borescope tool of 2.5 mm (0.0984 in.) to 4 mm (0.1575 in.) dia and a light source.
(1) Make sure that it is free of any particles/contamination. If you find any signs of oil coking, remove the oil scavenge tube to do a chemical cleaning.
Subtask 72-56-00-110-054-A ** ON A/C NOT FOR ALL (1) Make sure that it is free of any particles/contamination. If you find any signs of oil coking, remove the oil scavenge tube to do a chemical cleaning.
C. If the borescope check of the oil scavenge tube shows coking contamination, degrease and clean the tube as follows:
(1) Attach the steel tubing and the pump to the removed oil scavenge tube.
SPM 702117 .
(3) Do a visual inspection of the cleaned oil scavenge tube with a flexible borescope tool of 2.5 mm (0.0984 in.) to 4 mm (0.1575 in.) dia and a light source after cleaning to make sure that it is free of any particles/contamination before re-installation.
(a) No oil coked particles/contamination are permitted.
(b) Repeat the cleaning task until the tube is free of particles/contamination.
(4) Disconnect the cleaned tube from the steel tubing and the pump.
Subtask 72-56-00-110-055-A ** ON A/C NOT FOR ALL (1) Attach the steel tubing and the pump to the removed oil scavenge tube.
NOTE: You must use steel tubing and an acceptable pump to do this procedure.
(2) Clean the internal oil tubes (3) Do a visual inspection of the cleaned oil scavenge tube with a flexible borescope tool of 2.5 mm (0.0984 in.) to 4 mm (0.1575 in.) dia and a light source after cleaning to make sure that it is free of any particles/contamination before re-installation.
(a) No oil coked particles/contamination are permitted.
(b) Repeat the cleaning task until the tube is free of particles/contamination.
(4) Disconnect the cleaned tube from the steel tubing and the pump.
D. Degrease and mechanically clean the oil scavenge tube (not removable) as follows:
(3) Put a cap for the oil scavenge tube on the outer case side.
(4) Put a sufficient quantity of WD-40 (Material No.CP2554) to fill the tube and keep it for a sufficient time to affect the coking in the concerned area.
(5) Put a container under the tube to collect the penetrant corrosion inhibitor.
(6) Remove the cap from the tube and collect the penetrant corrosion inhibitor.
(7) Turn the tube in its position to get access to the ends of the tube.
(8) Introduce a cylinder-brush tool through the tube ends and move the tool to the coked area.
(10) Do an alternative movement of rotation on the tool to break the coking contamination.
(11) Extract the tool and use lint-free cloths to collect the coked particle.
(14) Dry the tube with a clean compressed air source or nitrogen source.
(15) Do a visual inspection of the cleaned tube with a flexible borescope tool of 2.5 mm (0.0984 in.) to 4 mm (0.1575 in.) dia and a light source after cleaning to make sure that it is free of any particles/contamination before you use it again.
(16) Do a mechanical cleaning of the nipple of the No. 5 bearing support at the 6 o'clock position to remove any signs of oil coking.
(17) Dry and clean the nipple with a compressed air source or nitrogen source.
(18) Do a visual inspection of the cleaned tube with a flexible borescope tool of 2.5 mm (0.0984 in.) to 4 mm (0.1575 in.) dia and a light source after cleaning to make sure that it is free of any particles/contamination before the installation of the oil scavenge tube.
(a) Repeat the cleaning until the nipple is free of particles/contamination.
Subtask 72-56-00-420-063-A ** ON A/C NOT FOR ALL NOTE: This is a mechanical cleaning because the tube is non-removable.
(1) Put protection on the No. 5 bearing to prevent any contamination by the material. NOTE: Be careful to put protection equipment on the No. 5 bearing before you start a mechanical cleaning of the oil scavenge line.
(2) Put protection on all the cavities and tube ends to prevent any contamination by the material. (3) Put a cap for the oil scavenge tube on the outer case side.
(4) Put a sufficient quantity of WD-40 (Material No.CP2554) to fill the tube and keep it for a sufficient time to affect the coking in the concerned area.
(5) Put a container under the tube to collect the penetrant corrosion inhibitor.
(6) Remove the cap from the tube and collect the penetrant corrosion inhibitor.
(7) Turn the tube in its position to get access to the ends of the tube.
(8) Introduce a cylinder-brush tool through the tube ends and move the tool to the coked area.
WARNING:
BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES.
IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER.
IF NECESSARY, GET MEDICAL HELP.
AIRCRAFT FUEL IS POISONOUS.
(9) Put a small quantity of kerosene (Material No.CP1065) with a filler tool in the tube. (10) Do an alternative movement of rotation on the tool to break the coking contamination.
(11) Extract the tool and use lint-free cloths to collect the coked particle.
WARNING:
BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES.
IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER.
IF NECESSARY, GET MEDICAL HELP.
AIRCRAFT FUEL IS POISONOUS.
(12) Clean the cylinder-brush tool with kerosene (Material No.CP1065) . WARNING:
BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES.
IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER.
IF NECESSARY, GET MEDICAL HELP.
AIRCRAFT FUEL IS POISONOUS.
CAUTION:
DO NOT INTRODUCE ANY PARTICULES/CONTAMINATION TO THE INTERNAL SIDE OF THE BEARING SUPPORT TO PREVENT BEARING CONTAMINATION. YOU CAN CAUSE DAMAGE TO THE ENGINE.
(a) Repeat the cleaning until tube is free of particles/contamination. NOTE: No oil coked particles/contamination is permitted.
(13) Do a flushing of the tube with kerosene (Material No.CP1065) or isopropyl alcohol (Material No.CP1041) . (14) Dry the tube with a clean compressed air source or nitrogen source.
(15) Do a visual inspection of the cleaned tube with a flexible borescope tool of 2.5 mm (0.0984 in.) to 4 mm (0.1575 in.) dia and a light source after cleaning to make sure that it is free of any particles/contamination before you use it again.
(16) Do a mechanical cleaning of the nipple of the No. 5 bearing support at the 6 o'clock position to remove any signs of oil coking.
(17) Dry and clean the nipple with a compressed air source or nitrogen source.
(18) Do a visual inspection of the cleaned tube with a flexible borescope tool of 2.5 mm (0.0984 in.) to 4 mm (0.1575 in.) dia and a light source after cleaning to make sure that it is free of any particles/contamination before the installation of the oil scavenge tube.
(a) Repeat the cleaning until the nipple is free of particles/contamination.
NOTE: No oil coked particles/contamination are permitted.
E. Reconnection of the oil scavenge line
(1) Reconnect the oil scavenge line as follows:
(a) Remove the protection from the No. 5 bearing cavity and oil scavenge tube ends.
(b) Apply a thin layer of molykote G rapid (Material No.CP2104) with a spray gun on the guide bushing of the oil scavenge tube.
(c) Engage the guide bushing of the oil scavenge tube into the boss of the TRF at the 5 o'clock position.
(d) Connect the coupling nut of oil scavenge tube to the 6 o'clock nipple on the No. 5 bearing support. Tighten the coupling nut by hand.
(a) Loosen the four counter wrench bolts.
(b) Install the counter wrench on the No. 5 bearing support nipple.
(c) Tighten the two support bolts on the turbine rear frame.
(d) Do a clockwise rotation on the counter wrench to take up and tighten the four counter wrench bolts.
(3) TORQUE the coupling nut of the oil scavenge tube to between 6 and 5 m.daN (44.25 and 36.87 lbf.ft ) with the oil scavenge tube nut wrench.
(a) Attach withCP8001 lockwire 0.032 in. (0.8 mm) dia. CP8006 safety cable 0.032 in. (0.8 mm) dia.
(4) Remove the counter wrench from the TRF flange.
(5) Reconnect the rear sump oil scavenge tube to the oil scavenge tube.
.
(c) Safety the coupling nut to the nipple withCP8001 lockwire 0.032 in. (0.8 mm) dia. CP8006 safety cable 0.032 in. (0.8 mm) dia.
5. Close-up(1) Reconnect the oil scavenge line as follows:
(a) Remove the protection from the No. 5 bearing cavity and oil scavenge tube ends.
(b) Apply a thin layer of molykote G rapid (Material No.CP2104) with a spray gun on the guide bushing of the oil scavenge tube.
(c) Engage the guide bushing of the oil scavenge tube into the boss of the TRF at the 5 o'clock position.
(d) Connect the coupling nut of oil scavenge tube to the 6 o'clock nipple on the No. 5 bearing support. Tighten the coupling nut by hand.
CAUTION:
ALWAYS INSTALL THE COUNTER WRENCH ON THE NIPPLE OF THE NUMBER-5 BEARING SUPPORT. THEN LOOSEN OR TIGHTEN THE COUPLING NUT OF THE OIL SCAVENGE TUBE. THIS WILL HELP TO PREVENT DAMAGE TO THE NIPPLE.
(2) Install the 856A3492G03 WRENCH-COUNTERTORQUE NO 5 BEARING NIPPLE LINE on the TRF flange. (a) Loosen the four counter wrench bolts.
(b) Install the counter wrench on the No. 5 bearing support nipple.
(c) Tighten the two support bolts on the turbine rear frame.
(d) Do a clockwise rotation on the counter wrench to take up and tighten the four counter wrench bolts.
(3) TORQUE the coupling nut of the oil scavenge tube to between 6 and 5 m.daN (44.25 and 36.87 lbf.ft )
with the oil scavenge tube nut wrench. (a) Attach with
(4) Remove the counter wrench from the TRF flange.
(5) Reconnect the rear sump oil scavenge tube to the oil scavenge tube.
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.
(a) Apply a layer of engine oil (Material No.CP2442) on the threads of the rear sump oil scavenge tube. CAUTION:
USE TWO WRENCHES TO TIGHTEN THE TUBE COUPLING NUTS. USE ONE WRENCH TO HOLD THE NIPPLE FITTING. USE THE OTHER WRENCH TO TIGHTEN THE COUPLING NUT. IF THE NIPPLE FITTING TURNS, DAMAGE CAN OCCUR.
(b) TORQUE the coupling nuts to between 12.5 and 10 m.daN (92.18 and 73.75 lbf.ft ) . (c) Safety the coupling nut to the nipple with
Subtask 72-56-00-410-071-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) Install the oil inlet cover (Ref. AMM TASK 72-56-00-400-002).
(3) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the oil inlet cover (Ref. AMM TASK 72-56-00-400-002).
(3) Remove the WARNING NOTICE(S).