Inspection of the Magnetic Chip Collectors for Oil Contamination [PW11]

TASK 79-00-00-281-802-A
Inspection of the Magnetic Chip Collectors for Oil Contamination

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: WAIT FIVE MINUTES MINIMUM TO MAKE SURE THAT THE OIL SYSTEM IS NOT PRESSURIZED BEFORE YOU DO THIS PROCEDURE. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 400

1. Reason for the Job
Use this procedure to do an inspection of the six magnetic chip collectors. Five of the chip collectors are located on the lubrication and scavenge pump attached to the front of the Main Gearbox (MGB). The sixth chip collector is located on the No. 4 bearing compartment scavenge line.
The lubrication and scavenge pump has bearing compartment designations to identify which chip collector is for which bearing compartment as follows:

MGB Main Gearbox
AGB Angle Gearbox
FBC Forward Bearing Compartment (No. 1, 1.5 and 2 Bearing Compartments) and Fan Drive Gear System (FDGS)
BC3 Bearing Compartment No. 3
BC4 Bearing Compartment No. 4 - Chip collector located on the scavenge line
BC5 Bearing Compartment (No. 5 and 6).

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	BOTTLE - SQUEEZE
No specific	1	CONTAINER 20L (5 USGAL)
No specific	1	MAGNIFYING GLASS POWER 20X
No specific	1	MICROSCOPE-BINOCULAR

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P03-001)	lubricant, aircraft turbine engine
(Material No.P05-005)	lint-free cotton cloth
(Material No.P05-126)	Brush, short bristle nylon
(Material No.P05-181)	Filter, paper
(Material No.P11-014)	isopropyl alcohol
(Material No.P11-027)	Petroleum Solvent

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	PACKING	EIPC 79-22-01-01-020

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
TASK 79-00-00-210-811-A	Laboratory Analysis of the Engine Oil for Contamination
TASK 79-21-06-960-801-A	Replace the Oil Filter Element
TASK 79-22-01-000-801-A	Removal and Inspection of the Magnetic Chip Collector Assemblies
TASK 79-22-01-400-801-A	Installation of the Magnetic Chip Collector Assemblies
TASK 79-22-01-720-801-A	Functional Test of the Magnetic Chip Collectors
TASK 80-11-00-200-801-A	Inspection of the Starter Magnetic Drain Plug for Oil Contamination
Inspection of the Magnetic Chip Collectors for Oil Contamination
Inspection of the Magnetic Chip Collectors for Oil Contamination - (Chips, Flakes and Fines Troubleshooting)

3. Job Set-up
Subtask 79-00-00-941-084-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 79-00-00-010-089-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 79-00-00-040-059-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for Ground Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 79-00-00-010-090-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 79-00-00-281-058-A ** ON A/C NOT FOR ALL

A. Oil Analysis
(1)

Inspection of the Magnetic Chip Collectors for Oil Contamination ** ON A/C NOT FOR ALL

(2)

Inspection of the Magnetic Chip Collectors for Oil Contamination ** ON A/C NOT FOR ALL

(3) Do the inspection of each chip collector (2) one at a time so that you know what the bearing compartment each collector (2) belongs to. The lubrication and scavenge pump is marked with the bearing compartment number next to each chip collector.

CAUTION: WHEN YOU REMOVE CHIP COLLECTORS, DO NOT LET THEM TOUCH EACH OTHER. IF YOU DO, THE CHIP COLLECTORS CAN BECOME DEMAGNETIZED.

(4) Make sure the magnetic chip collectors (2) do not touch each other.
(5) Keep accurate records of all contamination on each chip collector (2).
(6) If the engine or the MGB cannot continue in service, you must send the contamination and/or the analysis of the contamination with the engine or the MGB to the repair facility.
(7) Push in and turn the chip collector (2) counterclockwise to disengage it from the valve.
(8) If any of the chip collector valves leak oil continuously after the removal of the chip collector (2), replace the applicable magnetic-chip collector assembly as follows:

NOTE: A few drops of oil may appear immediately after the chip collector (2) is removed. Wipe these drops away. If no additional drops appear the chip collector assembly does not need to be replaced.

(a) If necessary, remove the magnetic-chip collector assemblies (Ref. AMM TASK 79-22-01-000-801).
(b) If necessary, install the magnetic-chip collector assemblies (Ref. AMM TASK 79-22-01-400-801).
(9) Do a visual inspection of each chip collector (2) for the contamination as follows:

Inspection of the Magnetic Chip Collectors for Oil Contamination ** ON A/C NOT FOR ALL

(a) Examine the chip collectors (2) with the MAGNIFYING GLASS POWER 20X.

NOTE: You can use the MAGNIFYING GLASS POWER 20X however it is recommended you use the MICROSCOPE-BINOCULAR.

(b) This procedure gives instructions on how to interpret the debris contamination that is on the magnetic chip collectors (2). For information on the methods of quantitative analysis and on the composition of the contamination (Ref. AMM TASK 79-00-00-210-811).

NOTE: If there is a question about the type of contamination you see, obey the action that follows the stricter interpretation.

Build debris collects during the early stages of engine operation after assembly of the engine. Build debris can look like strands of curly steel wool, shaving or burrs.

2 Fines:

These are very small steel particles which show as a black sludge on the MCD. When the oil is removed they show as dull hair like slivers. Fines come from permitted engine wear. Bearing skid can also make fines, but the increased quantity will show during the analysis of the MCD samples. Fines are usually found on the engines that have operated for only a short time since new, repair or overhaul.

3 Chip:

These are very thick flakes or pieces of metal which usually have one smooth machined surface and the opposite surface is rough and irregular.

4 Flakes:

Flakes have irregular shapes, but are usually flat and shiny on both sides. You must do an analysis of them to know their source.

(d) Examine the chip collector (2) with suitable magnification. If there is debris contamination, make a record of the quantity and type of debris contamination found and the pump location of the collector (2):
1

Inspection of the Magnetic Chip Collectors for Oil Contamination ** ON A/C NOT FOR ALL

NOTE: Condition C shows the collector tip with oil on it. This condition is usually caused by small metallic particles that hold the oil near the collector (2). Step 4.A.(9)(d)1_ is done when this condition is found.

2 If the chip collector (2) is clean with no contamination, it can be cleaned and reinstalled. Refer to steps in this task.
3

Inspection of the Magnetic Chip Collectors for Oil Contamination - (Chips, Flakes and Fines Troubleshooting) ** ON A/C NOT FOR ALL

4 Build debris contamination:

Inspection of the Magnetic Chip Collectors for Oil Contamination ** ON A/C NOT FOR ALL

a Action:

The engine can continue in service.
Operation is decreased to ten flight hours or five flight cycles, the lesser of the two, until the source of the debris contamination material can be identified. Do a spectroscopic analysis of the chips and flakes per Section G of the oil system oil analysis procedure (Ref. AMM TASK 79-00-00-210-811).
If the debris is from the bearing, gear or carbon seal carrier material, remove the engine from service and disassemble the engine enough to find the source of the material.
If the debris is not from the bearing, gear or carbon seal material, return the engine to service.
If the debris on FBC MCC is identified as AISI 52100 (AMS 6440), remove the engine in 50 flight hours unless the other debris results warrant more restrictive action.

5 Magnetic fines:

Inspection of the Magnetic Chip Collectors for Oil Contamination ** ON A/C NOT FOR ALL

NOTE: Fines are usually from the low time engines. Small quantities are serviceable.

a If there are fines on the chip collector (2) do the evaluation of the quantity, area and type of material:

Inspection of the Magnetic Chip Collectors for Oil Contamination - (Chips, Flakes and Fines Troubleshooting) ** ON A/C NOT FOR ALL

If fines are found on the MGB chip collector probe surface, examine the starter-magnetic drain plug (Ref. AMM TASK 80-11-00-200-801).

b If the fines are on 100 percent of the probe surface then remove the engine from service:

If the fines are on 100 percent of the no. 3 bearing compartment probe surface, remove the engine in ten hours or five flight cycles, whichever is less.

NOTE: If the no. 3 bearing compartment probe surface shows 100 percent coverage, it is not unusual to find equivalent unwanted fine coverage on the AGB probe and some coverage of the MGB probe. The ten hour or five flight cycle limit is also applicable to these conditions.

c If the quantity of fines is more than 25 percent of the collector (2) tip perimeter but less than 100 percent of the probe surface, do a visual inspection of the main oil filter element for contamination as follows:

If the MGB probe fines are greater than 25 percent of the probe tip perimeter bus less than 100 percent of the probe surface, do the steps that follow:

1. If replacement of the starter was necessary by (Ref. AMM TASK 80-11-00-200-801), clean the MGB probe, drain the MGB oil, replace the oil filter and continue in service.

2. If replacement of the starter was not necessary, do an analysis of the fines. If bearing or gear material is found, remove the engine from service.
Do a visual inspection of the main oil filter element for the contamination as follows:
Remove the oil filter (Ref. AMM TASK 79-21-06-960-801).
Hold the oil filter over the clean CONTAINER 20L (5 USGAL).
Use Petroleum Solvent (Material No.P11-027) with the P05-126Brush, short bristle nylon to remove any contamination from the outside screen area of the filter element. Petroleum Solvent (Material No.P11-027) may also be applied to the inside of the filter to back flush contamination to the outside screen area.
Allow the Petroleum Solvent (Material No.P11-027) and the contamination to fall into the CONTAINER 20L (5 USGAL).
Slowly put the Petroleum Solvent (Material No.P11-027) , which is caught in the CONTAINER 20L (5 USGAL), through a P05-181Filter, paper or equivalent to catch the contamination in the Petroleum Solvent (Material No.P11-027) .
Try to keep the contamination in one area of the P05-181Filter, paper within a 0.5 in. (12.7 mm) diameter circle.
Use the BOTTLE - SQUEEZE and more clean Petroleum Solvent (Material No.P11-027) to rinse all the contamination into the P05-181Filter, paper if necessary.
If the collected main oil filter element debris contamination is across an area greater than a 0.5 in. (12.7 mm) diameter circle then remove the engine from service.
If the debris contamination area on from the main oil filter element is less than a 0.5 in. (12.7 mm) diameter circle, do a spectroscopic analysis of the chips and flakes (Ref. AMM TASK 79-00-00-210-811).
Operation is decreased to ten flight hours or five flight cycles, the lesser of the two, until the source of the debris contamination material can be identified.
If the fines from the chip collector and the filter are the same bearing, gear or carbon-seal carrier material, remove the engine from service and disassemble the engine enough to find the source of the material.
If the fines from the chip collector and the filter are not the same bearing, gear or carbon-seal carrier material, install a new oil filter and return the engine to service.
1. Examine the chip collectors and filter again in 15 hours or less.
2. After the 15 hours or less inspection, you can install the filter again.
If the debris on FBC MCC is identified as AISI 52100 (AMS 6440), remove the engine in 50 flight hours unless the other debris results warrant more restrictive action.

6 Chips or flakes:

Inspection of the Magnetic Chip Collectors for Oil Contamination ** ON A/C NOT FOR ALL

a If there are chips or flakes on the chip collector (2) do the evaluation of the quantity, area and type:

Inspection of the Magnetic Chip Collectors for Oil Contamination - (Chips, Flakes and Fines Troubleshooting) ** ON A/C NOT FOR ALL

If five or less chips or flakes are found on the MGB chip collector probe surface, examine the starter magnetic drain plug (Ref. AMM TASK 80-11-00-200-801).

b If the main gearbox probe (2) has five or less chips or flakes on the chip collector, do the procedure that follows:

If replacement of the starter was necessary (Ref. AMM TASK 80-11-00-200-801), clean the MGB probe, drain the MGB oil, replace the oil filter and continue in service.
If replacement of the starter was not necessary, do an analysis of the chips and flakes. If bearing or gear material is found, remove the engine from service.

c If there are six or more chips or flakes then remove the engine from service.
d If the quantity of chips or flakes is less than six, do a visual inspection of the main oil filter element for debris or contamination by the procedure that follows:

Remove the oil filter (Ref. AMM TASK 79-21-06-960-801).
Hold the oil filter over the clean CONTAINER 20L (5 USGAL).
Use the Petroleum Solvent (Material No.P11-027) with the P05-126Brush, short bristle nylon to remove any contamination from the outside screen area of the filter element. Petroleum Solvent (Material No.P11-027) may also be applied to the inside of the filter to back flush contamination to the outside screen area.
Allow the Petroleum Solvent (Material No.P11-027) and contamination to fall into the CONTAINER 20L (5 USGAL).
Slowly put the Petroleum Solvent (Material No.P11-027) through a P05-181Filter, paper or equivalent to catch the contamination in the Petroleum Solvent (Material No.P11-027) .
Try to keep the contamination in one area of the P05-181Filter, paper within a 0.5 in. (12.7 mm) diameter circle.
Use the BOTTLE - SQUEEZE and more clean Petroleum Solvent (Material No.P11-027) to rinse all the contamination into the P05-181Filter, paper if necessary.
If the collected main oil filter element debris contamination is across an area greater than a 0.5 in. (12.7 mm) diameter circle then remove the engine from service.
If the debris contamination area on from the main oil filter element is less than a 0.5 in. (12.7 mm) diameter circle, do a spectroscopic analysis of the chips and flakes per Section G of (Ref. AMM TASK 79-00-00-210-811).
Operation is decreased to ten flight hours or five flight cycles, the lesser of the two, until the source of the debris contamination material can be identified.
If the chips or flakes from the chip collector and the filter are the same bearing, gear or carbon-seal carrier material, remove the engine from service and disassemble the engine enough to find the source of the material.
If the chips or flakes from the chip collector and the filter are not the same bearing, gear or carbon-seal carrier material, install a new oil filter and return the engine to service:
1. Examine the chip collectors and filter again in 15 hours or less.
2. After the 15 hours or less inspection, you can install the filter again.
If the debris on FBC MCC is identified as AISI 52100 (AMS 6440), remove the engine in 50 flight hours unless the other debris results warrant more restrictive action.

(10) Examination of the Magnetic Chip Collectors (MCC)s with no ECAM alert:
(a) Use this section of the manual when the MCCs are examined for reasons other than when ECAM message ENGX OIL CHIP DETECTED and CLM ENGXD-0631-OIL DEBRISOVERLIMIT DETECTED BY OD is shown and debris is found on the MCCs.
(b) When you do normal engine operation, it is possible that small quantities of material from the gear, seal and bearing hardware can collect on the MCCs at a very low rate. This will not cause an ECAM alert. MCCs with fines less than 25 percent or build debris are normal and are not cause for the engine removal.
(c) The Oil Debris Monitoring (ODM) system monitors debris in the oil system during engine operation and will set the "chip detected" alert when the rate of debris detected is more than the approved limit.
(d) If debris is found on the MCCs without the ODM indication, do the procedure as follows:
1 Chips or flakes:

If more than five chips or flakes, obey the current MCC inspection criteria.

2 Fines:

If less than 25 percent of the collector (2) tip perimeter has fines, clean the MCC and return the engine to service.
If debris coverage is less than 25 percent and an analysis shows the material to be the bearing, gear or carbon seal assembly material, the engine removal is not necessary. Examine the MCCs again by the current MCC inspection criteria in 25 flight hours or less.
If debris is found at the next inspection, do an analysis of the material in ten hours or five cycles, that which occurs first. If debris is the bearing, gear or carbon seal material, remove the engine.
If no debris is found at the next inspection, the engine can continue in service and you can install the filter again.
If more than 25 percent of the collector (2) tip perimeter has fines, do an analysis of the material in ten hours or five cycles, that which occurs first. Obey the current MCC inspection criteria.

(11) Prepare the chip collectors (2) for installation as follows:

Inspection of the Magnetic Chip Collectors for Oil Contamination ** ON A/C NOT FOR ALL

(a) Use lint-free cotton cloth (Material No.P05-005) to remove all the contamination from the chip collectors (2).
(b) Examine the packing (1) on each chip collector (2) for damage or wear.
(c) If no visual damage or wear is found to the packing (1), you do not have to remove or replace the packing (1).
(d) If you see any damage or wear, you must replace the packing as follows:
1 Discard the packing (1) from the chip collector (2).
2 Apply P03-001lubricant, aircraft turbine engine to the new EIPC 79-22-01-01-020 PACKING (1).
3 Install the packing (1) to the chip collector (2).
(e) If you think that the magnetic chip collector (2) is not functioning correctly, do a functional check of the magnetic chip collector (Ref. AMM TASK 79-22-01-720-801).
(12) Install the six compartment-magnetic chip collectors (2) as follows:

Inspection of the Magnetic Chip Collectors for Oil Contamination ** ON A/C NOT FOR ALL

(a) Install the chip collectors (2) to the chip collector valves in the lubrication and scavenge pump.
(b) Push in and turn each chip collector (2) clockwise to engage into the valve completely.
(c) Pull on each chip collector (2) to make sure that it is fully engaged and locked in position.

Table 601 - Inspection of the Magnetic Chip Collectors for Oil Contamination - (Chips, Flakes and Fines Troubleshooting Chart)

Reference Number	Instructions For Combined Chart For Chips, Flakes and Fine
(1)	Make sure that the debris is metallic. Coke or carbon particles are not the debris (crush if necessary to find composition of the debris).
(2)	If chips/flakes and fines are found, use the more careful path.
(3)	Build debris is usually found during the first 1000 hours of operation.
(4)	During this 50 flight hour period, the ECAM message ENGX OIL CHIP DETECTED can possibly come on. If it does, obey current AMM and Troubleshooting procedures to make sure debris source is not from other bearing compartments and new results do not warrant more restrictive action.

(13) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 79-00-00-410-076-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 cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.

Subtask 79-00-00-440-059-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 79-00-00-410-077-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:57:07 UTC