DOC AIRBUS | AMM A320FCheck of the Lubrication Unit Magnetic Plugs and Scavenge Screens [CFMI]
TASK 79-21-10-210-002-A
Check of the Lubrication Unit Magnetic Plugs and Scavenge Screens
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 79-21-10-941-054-A ** ON A/C NOT FOR ALL
Subtask 79-21-10-020-054-A ** ON A/C NOT FOR ALL
Subtask 79-21-10-410-054-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:38:07 UTC
Check of the Lubrication Unit Magnetic Plugs and Scavenge Screens
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | MAGNET |
| No specific | 1 | MAGNET - BAR, SMALL |
| No specific | 1 | MAGNIFYING GLASS POWER 10X |
| No specific | AR | WARNING NOTICE(S) |
| 856A2683G01 | AR | CFMI SOFTWARE FOR MCD IDENTIFICATION |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1039) | acetone |
| (Material No.CP2010) | white spirit |
| (Material No.CP2011) | stoddard solvent |
| (Material No.CP2559) | ardrox 552 |
| (Material No.CP2560) | turco ind 79 |
| (Material No.CP2566) | mag-chem teksol |
| (Material No.CP2584) | degreasol 99 R |
| (Material No.CP2656) | mag-chem skysol |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-000-040-A | Removal of the Power Plant |
| TASK 71-00-00-000-040-A-01 | Removal of the Power Plant with the Engine Positioner TWW 75E |
| TASK 71-00-00-000-040-A-03 | Removal of the Power Plant with Jacxson Tool |
| TASK 71-00-00-400-040-A | Installation of the Power Plant |
| TASK 71-00-00-400-040-A-01 | Installation of the Power Plant with the Engine Positioner TWW 75E |
| TASK 71-00-00-400-040-A-03 | Installation of the Power Plant with Jacxson Tool |
| TASK 71-13-00-010-040-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-A | Closing of the Fan Cowl Doors |
| TASK 72-62-00-000-001-A | Removal of the Transfer Gearbox Module |
| TASK 72-62-00-400-001-A | Installation of the Transfer Gearbox Module |
| TASK 72-63-00-000-001-A | Removal of the Accessory Gearbox Module |
| TASK 72-63-00-400-001-A | Installation of the Accessory Gearbox Module |
| TASK 79-21-10-000-002-A | Removal of the Magnetic Plug Assembly |
| TASK 79-21-10-400-002-A | Installation of the Magnetic Plug Assembly |
Subtask 79-21-10-941-054-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 79-21-10-010-054-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 cowl doors (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 79-21-10-020-054-A ** ON A/C NOT FOR ALL
A. Removal and Examination of the Magnetic Plug Assemblies:
(2) Remove the scavenge screen from the magnetic plug. Use a nylon or fiber rod pusher to depress the spring-loaded pin that attaches the scavenge screen to the magnetic plug.
Scavenge Filter from/on the Magnetic Plug with Installed O-Ring and Solosele G-Seal ** ON A/C NOT FOR ALL
Subtask 79-21-10-210-053-A ** ON A/C NOT FOR ALL CAUTION:
REMOVE AND EXAMINE THE MAGNETIC PLUG ASSEMBLIES ONE AT A TIME TO PREVENT ERRORS IN THE IDENTIFICATION OF FAULTY SOURCES. AN ERROR IN THE SUMP INVOLVED CAN CAUSE A DIAGNOSIS ERROR.
(1) Remove and examine the magnetic plug assemblies one at a time (Ref. AMM TASK 79-21-10-000-002). Take care not to displace any retained particles. (2) Remove the scavenge screen from the magnetic plug. Use a nylon or fiber rod pusher to depress the spring-loaded pin that attaches the scavenge screen to the magnetic plug.
Scavenge Filter from/on the Magnetic Plug with Installed O-Ring and Solosele G-Seal ** ON A/C NOT FOR ALL B. Inspection of the Magnetic Plugs and Scavenge Screens
(1) Removal of the particles from the magnet of the magnetic plugs:
(b) Keep the particles from each sump separated and put them on separate thin sheets of paper.
(2) Removal of the particles from the scavenge screens:
(a) Carefully remove the particles from the scavenge screens and keep them on thin sheets of paper.
(b) Keep the material collected from each scavenge screen separate.
(3) Use a MAGNET to separate the magnetic particles from the non-magnetic particles.
(4) Remove the oil from the collected particles with stoddard solvent (Material No.CP2011) or acetone (Material No.CP1039) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) or white spirit (Material No.CP2010) .
(5) Make sure that the scavenge screens are free of all particles.
(6) Clean the scavenge screens with stoddard solvent (Material No.CP2011) .
(7) Examine the particles from the magnetic plug and scavenge screen to identify the physical properties of the material (shape, size, quantity, magnetic properties, color) to be used in the following analysis.
(a) Any quantity of material that is less than or equal to 0.004 in. (0.10 mm) in all dimensions is a serviceable condition.
(b) Refer to CFM NDTM Part 10 "CFMI-TP.NT.11" or 856A2683G01 CFMI SOFTWARE FOR MCD IDENTIFICATION to identify the possible source.
(c) Examine the magnetic particles.
1 Use a MAGNIFYING GLASS POWER 10X and a MAGNET - BAR, SMALL to examine the magnetic particles for the material which is larger than 0.004 in. (0.10 mm) in any dimension.
2 Compare the magnetic particles found with the descriptions in the figures
to identify the particles, their potential source from within the engine and the recommendations. To identify the particles, take into consideration the sump from which the particles were found, their size and the physical descriptions in the tables. Following the recommendations of the tables, do these tasks:
4 If magnetic particles cannot be identified, for further action refer to the figure.
If a ground run is necessary, operate the engine at a minimum of 70 percent N1 for ten minutes and do a check of the magnetic plug.
(d) Examine the non-magnetic particles.
1 Use a MAGNIFYING GLASS POWER 10X to examine the non-magnetic particles for material which is larger than 0.004 in. (0.10 mm) in any dimension:
2 Compare the non-magnetic particles found with the descriptions in the figure
to identify the particles, their potential source from within the engine and the recommendations. To identify the particles, take into consideration the sumpfrom which the particles were found, their size and the physical descriptions in the tables.
Following the recommendations of the tables, do these tasks:
Subtask 79-21-10-420-053-A ** ON A/C NOT FOR ALL 5. Close-up(1) Removal of the particles from the magnet of the magnetic plugs:
CAUTION:
DO NOT USE A MAGNET TO REMOVE PARTICLES. THE USE OF MAGNET ON THE MCD CAN DECREASE MAGNETIC PERFORMANCE OF MAGNETIC PLUGS.
(a) Carefully remove the particles from the magnets with a Textile-Lint free Cotton - (Material No.14SBA1) (lintless, cotton, process cleaning absorbent wiper such as cheese cloth or gauze) or PAPER THIN. (b) Keep the particles from each sump separated and put them on separate thin sheets of paper.
(2) Removal of the particles from the scavenge screens:
(a) Carefully remove the particles from the scavenge screens and keep them on thin sheets of paper.
(b) Keep the material collected from each scavenge screen separate.
(3) Use a MAGNET to separate the magnetic particles from the non-magnetic particles.
(4) Remove the oil from the collected particles with stoddard solvent (Material No.CP2011) or acetone (Material No.CP1039) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) or white spirit (Material No.CP2010) .
(5) Make sure that the scavenge screens are free of all particles.
(6) Clean the scavenge screens with stoddard solvent (Material No.CP2011) .
(7) Examine the particles from the magnetic plug and scavenge screen to identify the physical properties of the material (shape, size, quantity, magnetic properties, color) to be used in the following analysis.
(a) Any quantity of material that is less than or equal to 0.004 in. (0.10 mm) in all dimensions is a serviceable condition.
(b) Refer to CFM NDTM Part 10 "CFMI-TP.NT.11" or 856A2683G01 CFMI SOFTWARE FOR MCD IDENTIFICATION to identify the possible source.
(c) Examine the magnetic particles.
1 Use a MAGNIFYING GLASS POWER 10X and a MAGNET - BAR, SMALL to examine the magnetic particles for the material which is larger than 0.004 in. (0.10 mm) in any dimension.
2 Compare the magnetic particles found with the descriptions in the figures
to identify the particles, their potential source from within the engine and the recommendations. To identify the particles, take into consideration the sump from which the particles were found, their size and the physical descriptions in the tables. Following the recommendations of the tables, do these tasks:
- Replace the engine (Ref. AMM TASK 71-00-00-000-040) and (Ref. AMM TASK 71-00-00-400-040)
- Replace the TGB (Ref. AMM TASK 72-62-00-000-001) and (Ref. AMM TASK 72-62-00-400-001)
- Replace the AGB (Ref. AMM TASK 72-63-00-000-001) and (Ref. AMM TASK 72-63-00-400-001).
4 If magnetic particles cannot be identified, for further action refer to the figure.
If a ground run is necessary, operate the engine at a minimum of 70 percent N1 for ten minutes and do a check of the magnetic plug.
(d) Examine the non-magnetic particles.
1 Use a MAGNIFYING GLASS POWER 10X to examine the non-magnetic particles for material which is larger than 0.004 in. (0.10 mm) in any dimension:
2 Compare the non-magnetic particles found with the descriptions in the figure
to identify the particles, their potential source from within the engine and the recommendations. To identify the particles, take into consideration the sumpfrom which the particles were found, their size and the physical descriptions in the tables.
Following the recommendations of the tables, do these tasks:
- Replace the engine (Ref. AMM TASK 71-00-00-000-040) and (Ref. AMM TASK 71-00-00-400-040)
- Replace the AGB (Ref. AMM TASK 72-63-00-000-001) and (Ref. AMM TASK 72-63-00-400-001).
Subtask 79-21-10-410-054-A ** ON A/C NOT FOR ALL