TASK 72-00-00-200-008 Engine General - Examine The Magnetic Chip Detectors (MCD) And The Oil Filters, Inspection-008

DMC:V2500-A0-72-00-0000-10A-300A-B|Issue No:002.00|Issue Date:2017-02-01

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

All

Common Information

TASK 72-00-00-200-008 Engine General - Examine The Magnetic Chip Detectors (MCD) And The Oil Filters, Inspection-008

General

Fig/item numbers in parentheses in the procedure agree with those used in the IPC. Only the primary Fig/item numbers are used. For the service bulletin alpha variants refer to the IPC.

For all parts identified in a different Chapter/Section/Subject, the applicable Chapter/Section/Subject comes before the Fig/item number.

Discard all rubber seal rings removed in this procedure.

Discard the scavenge oil filter element when the inspection is complete.

The policy that is necessary for the inspection is given in the SPM TASK 70-20-01-200-501.

To identify, lubricate and install seal rings refer to the SPM TASK 70-44-01-400-501.

This TASK gives the procedure to examine the magnetic chip detectors and oil filters. For the correct sequence of SUBTASKS, refer to Figure. Other related TASKS are TASK 72-00-00-050-001 Removal of MCDs and TASK 72-00-00-450-001 Installation of MCDs.

All debris must be examined. Any debris that can not be identified must be referred to IAE.

Definitions of Debris

There are five main types of debris found on Magnetic Chip Detectors (MCDs) and in filters. They are; build debris, magnetic fines, metallic flakes, chips and gear tooth fragments.

Build debris, refer to Figure.

This is unwanted material that remains in the engine after it has been assembled. The build debris comes from machine operations when the components are made. It is not easy to see the difference between build material and gear or steel seal material.

Magnetic fines, refer to Figure.

These are very small steel particles which show as a black sludge on the MCD. When the oil is removed from the MCD they show as a dark fur around the magnet.

Metallic flakes, refer to Figure.

Metallic flakes can be from; ball bearings, roller bearings and gear teeth. Metallic flakes that have an irregular shape must be examined to find their origin.

Ball bearing and ball bearing track flakes are usually circular with radial cracks.

Roller bearing and roller bearing track flakes are usually almost rectangular in shape.

NOTE

When the flake (Paragraph and Paragraph) is clean, the shiny surface is much brighter than other types of flake. The shiny surface has small scratches which go across each other.

Gear teeth flakes are shiny with an irregular shape. They are usually thicker and not as bright as any of the ball or roller bearing flakes.

Chips, refer to Figure.

These are very thick flakes or pieces of metal which usually have one smooth machined surface.

Gear tooth fragments

These are the corner pieces of gear teeth and may show that the gears are not correctly aligned.

NOTE

Special tools are identified in the procedure by the tool primary number.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
20X Binocular MicroscopeLOCALBinocular Microscope, 20x
20X Magnifying GlassLOCALMagnifying glass, 20x
Small Bar MagnetLOCALSmall Bar Magnet
IAE 1F10082 Guide Pin0AM53IAE 1F100822

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-277 KEROSINELOCALCoMat 01-277
CoMat 02-011 FILTER PAPERLOCALCoMat 02-011
CoMat 10-061 STODDARD SOLVENTLOCALCoMat 10-061

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-00-00-050-051 Remove the Master MCD

    2. SUBTASK 72-00-00-050-052 Remove the MCDs

    3. SUBTASK 72-00-00-110-051 Clean the Debris on the MCD

    1. NOTE

      Make sure that the non-metallic container is clean before you use it.

      Partially fill the non-metallic container with CoMat 01-277 KEROSINE or CoMat 10-061 STODDARD SOLVENT.

    2. Gently lower the MCD in to the CoMat 01-277 KEROSINE or CoMat 10-061 STODDARD SOLVENT. Make sure that the metallic debris remains on the MCD. Gently remove the MCD when the debris is clean.

    4. SUBTASK 72-00-00-210-055 Examine the Debris on the MCD

      1. Examine the debris on the MCD with the 20X Binocular Microscope 1 off, or the 20X Magnifying Glass 1 off.

        1. Build debris

        1. Accept

        2. Fines

          1. Around less than half the circumference of the MCD

          1. Accept

          2. More than in (a)

          1. Reject

        3. Flakes, chips and gear tooth fragments

        1. Reject

    5. SUBTASK 72-00-00-050-053 Remove the Pressure Oil Filter

    1. Remove the pressure oil filter element, refer to TASK 72-00-60-050-011.

    2. Put the oil, previously drained from the filter housing, through CoMat 02-011 FILTER PAPER to remove the debris.

    3. Wash the filter element in clean CoMat 01-277 KEROSINE or CoMat 10-061 STODDARD SOLVENT in a clean container.

    4. Put the CoMat 01-277 KEROSINE or CoMat 10-061 STODDARD SOLVENT through the filter paper to remove the debris.

    5. Move a Small Bar Magnet 1 off, covered in tissue, above the debris to remove the ferrous material. The debris is to be examined as given in Step.

    6. SUBTASK 72-00-00-050-054 Remove the Scavenge Oil Filter

    1. Remove the scavenge oil filter element, refer to TASK 72-00-60-050-010.

    2. Put the oil, previously drained from the filter housing, through CoMat 02-011 FILTER PAPER to remove the debris.

    3. Wash the filter element in clean CoMat 01-277 KEROSINE or CoMat 10-061 STODDARD SOLVENT in a clean container.

    4. Put the CoMat 01-277 KEROSINE or CoMat 10-061 STODDARD SOLVENT through the filter paper to remove the debris.

    5. Move a Small Bar Magnet, covered in tissue, above the debris to remove the ferrous material. The debris is to be examined as given in Step.

    7. SUBTASK 72-00-00-210-056 Examine the Debris

      1. NOTE

        You will get greater amounts of debris on engines that have been overhauled. This debris is caused by the breaking-in of the seals and bearings. If you require any further information about any of this type of unwanted material contact IAE.

        Light alloy or silver.

        1. Less than would cover a square with 0.5 in. (12.7 mm) sides = an area of 0.25 sq in (161.29 sq mm).

        1. Accept

        2. More than in Step.

        1. Reject

      2. Magnetic fines.

        1. Less than would cover a square with 0.5 in. (12.7 mm) sides = an area of 0.25 sq in (161.29 sq mm).

        1. Accept

        2. More than in Step.

        1. Reject

    3. If the magnetic fines are identified as Jethete, material code E.A.D.; the intermediate case module is to be rejected.

      4. Flakes, chips or gear tooth fragments.

        1. Of steel, bronze or aluminum

        1. Reject

      5. Build debris

      1. Accept

      6. Fine particles of bronze or aluminum

        1. In the scavenge filter

        1. Accept

        2. In the pressure filter

        1. Reject

    8. SUBTASK 72-00-00-210-057 Examine the Oil Filter Elements

      1. Use a 20X Magnifying Glass 1 off, to examine the oil filter elements.

        1. NOTE

          The pressure oil filter element can be cleaned.

          Pressure oil filter element.

          1. Carbon deposits

          1. Reject

        2. Scavenge oil filter.

          1. Carbon deposits

          1. Reject

    9. SUBTASK 72-00-00-450-051 Install the Scavenge Oil Filter

    10. SUBTASK 72-00-00-450-052 Install the Pressure Oil Filter

    11. SUBTASK 72-00-00-110-052 Clean the Magnetic Chip Detectors (MCD)

    1. Thoroughly clean the MCDs in clean CoMat 01-277 KEROSINE or CoMat 10-061 STODDARD SOLVENT.

    2. Allow the MCDs to dry in the air.

    12. SUBTASK 72-00-00-450-053 Install the Magnetic Chip Detectors (MCD)

    13. Figure: Magnetic chip detector and oil filter examination procedure

    Magnetic chip detector and oil filter examination procedure

    Figure: Build debris

    Build debris

    Figure: Fines

    Fines

    Figure: Flakes

    Flakes

    Figure: Chips

    Chips

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

16VC301

Manufacturer Code:0AM53
Enterprise Name:IAE INTERNATIONAL AERO ENGINES AG
BU Name:NULL
Building:SUITE 400
Street:628 HEBRON AVENUE
City:GLASTONBURY
State:CT
Zip Code:06033
Country:USA
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 01-277
Type:sp01
Supply Short Name:CoMat 01-277 KEROSINE
Supply Name:CoMat 01-277 KEROSINE
Specification Groups:
Doc NumberType
OMAT: 101COMMERCIAL GRADE D.ENG.RD2494 MIL-T-5624 TYPE JP5
Suppliers:
ManufacturerRemarks
LOCAL
IE108
Manufacturer Code:LOCAL
Supply Number:CoMat 02-011
Type:sp01
Supply Short Name:CoMat 02-011 FILTER PAPER
Supply Name:CoMat 02-011 FILTER PAPER
Specification Groups:
Doc NumberType
OMAT:1/143WHATMAN 42
Suppliers:
ManufacturerRemarks
LOCAL
24853
K6835
U1185
Manufacturer Code:LOCAL
Supply Number:CoMat 10-061
Type:sp01
Supply Short Name:CoMat 10-061 STODDARD SOLVENT
Supply Name:CoMat 10-061 STODDARD SOLVENT
Specification Groups:
Doc NumberType
PMC 9001MIL-PRF-680, TYPE II
Suppliers:
ManufacturerRemarks
LOCAL
Manufacturer Code:LOCAL
Tool Number:Binocular Microscope, 20x
Tool Name:20X Binocular Microscope
Manufacturer Code:0AM53
Tool Number:IAE 1F10082
Tool Name:IAE 1F10082 Guide Pin
Manufacturer Code:LOCAL
Tool Number:Magnifying glass, 20x
Tool Name:20X Magnifying Glass
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