TASK 72-32-25-200-008 No. 3 Bearing Seal Seat - Examine, Inspection-008

DMC:V2500-A0-72-32-2510-00A-300A-C|Issue No:002.00|Issue Date:2016-11-01

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 72-32-25-200-008 No. 3 Bearing Seal Seat - Examine, Inspection-008

Effectivity

FIG/ITEM

PART NO.

02-400

2A1796

02-400

2A1798

02-400

2A1799

General

This TASK gives the procedure for the inspection of the No. 3 bearing seal seat. For the other parts of the No. 3 bearing rear oil seal, refer to TASK 72-32-25-200-000 (INSPECTION/CHECK-000).

Fig/item numbers in parentheses in the procedure agree with those used in the IPC.

The policy that is necessary for inspection is given in the SPM TASK 70-20-00-200-501.

All the parts must be cleaned before any part is examined. Refer to the SPM TASK 70-10-00-100-501.

All parts must be visually examined for damage, corrosion and wear. Any defects that are not identified in the procedure must be referred to IAE.

The procedure for those parts which must have a crack test is given in Step. Do the test before the part is visually inspected.

Do not discard any part until you are sure there are no repairs available. Refer to the instructions in Repair before a discarded part is used again or oversize parts are installed.

Parts which should be discarded can be held although no repair is available. The repair of a discarded part could be shown to be necessary at a later date.

All parts must be examined to make sure that all the repairs have been completed satisfactorily.

The practices and processes referred to in the procedure by the TASK numbers are in the SPM.

References

Refer to the SPM for data on these items.

Definitions of Damage, SPM TASK 70-02-02-350-501

Record and Control of the Lives of Parts, SPM TASK 70-05-00-220-501

Marking of Parts, SPM TASK 70-09-00-400-501

Procedure to Moderately Clean, SPM TASK 70-11-03-300-503

Procedure to Vapor Degrease, SPM TASK 70-11-01-300-503

Inspection of Parts, SPM TASK 70-20-01-200-501

General Information for Magnetic Particle Inspection, SPM TASK 70-24-00-240-501

Some data on these items is contained in this TASK. For more data on these items refer to the SPM.

Method of Testing for Crack Indications

Chemical Processes

Surface Protection

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Magna GageLOCALMagna Gage1

or equivalent

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-177 PETROLEUM (SOLVENT)23373CoMat 01-177
CoMat 10-061 STODDARD SOLVENTLOCALCoMat 10-061
CoMat 12-015 CORROSION PREVENTIVE, FINGERPRINT REMOVER0AM53CoMat 12-015
CoMat 12-016 CORROSION PREVENTIVE THIN FILM2H517CoMat 12-016
CoMat 01-077 NICKEL CHLORIDE NiCl2+6H2OLOCALCoMat 01-077

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-32-25-240-051 Examine the No. 3 Bearing Seal Seat (02-400) for Cracks

    1. Clean the Parts. Refer to the TASK 72-32-25-100-000 (CLEANING-000).

    2. Do the test for cracks on the parts that are given below.

      PART IDENT

      TASK/SUBTASK

      No. 3 bearing seal seat

      Given below

    3. If necessary, moderately clean the parts by the procedure given in the SPM TASK 70-11-03-300-503 vapor degrease the parts by the procedure given in the SPM TASK 70-11-01-300-503.

      4. Do the magnetic particle inspection by magnetizing circularly and rotate the part eccentrically on an insulated copper rod. Use 1500 amperage. Refer to the SPM TASK 70-24-01-240-501.

        NOTE

        When you use the fluorescent magnetic particles, carefully dip the part in CoMat 10-061 STODDARD SOLVENT to remove the unwanted fluorescent background.

      1. Cover the parts completely with iron oxide.

        2. Examine the parts for cracks.

          1. Cracked

          1. Reject

            NOTE

            If the part is not cracked, continue the inspection.

      5. Do the magnetic particle inspection by induction. Use 2500 amperage and a 4.00 in. (101.6 mm) diameter soft iron core. Use the manual or fixture method. Refer to the SPM TASK 70-24-01-240-501.

        1. The manual method.

        1. Wrap three turns of 0000 cable around the outer diameter of the core.

        2. Put the transformer core in the center of the part.

        3. Magnetize with a direct current for one-fifth to one-half second minimum. Use a quick break switch in the circuit.

        4. Cover the parts completely with iron oxide.

        2. The fixture method.

        1. Center the parts on the induced current fixture.

        2. Magnetize with a direct current for one-fifth to one-half second minimum. Use a quick break switch in the circuit.

        3. Cover the parts completely with iron oxide.

        3. Examine the parts for cracks.

          1. Cracked

          1. Reject

      4. Demagnetize the parts.

    2. SUBTASK 72-32-25-220-081 Examine the No. 3 Bearing Seal Seat (02-400) for Hardface that is Chipped, Pitted, Scratched and that is not there

      NOTE

      A discoloration or track on the hardface area after you have cleaned the part is a normal condition.

    1. Refer to Figure.

      2. Examine the seal seat at locations 2 and 4 for chipped hardface.

        1. Chipped.

          1. A maximum of 15 chipped areas up to 0.015 in. (0.381 mm) from the inner and outer edges of the hardface. Each chip must be less than 0.020 in. (0.508 mm) maximum circumferential length and have 0.125 in. (3.175 mm) minimum separation

          1. Accept

          2. Other than Step

          1. Repair, VRS3476 TASK 72-32-25-300-017 (REPAIR-017)

      3. Examine the seal seat at location 2, 3 and 4 for pitted hardface.

        1. Pits.

          1. There can be a maximum of six pits. Any three pits can be as much as 0.010 in. (0.254 mm) if they are clearly apart

          1. Accept

          2. There can be a maximum of six pits. Any one pit can be as much as 0.030 in. (0.78 mm). There must be a one inch (25.4 mm) minimum distance between pits that are more than 0.010 in. (0.254 mm). Pits on functional surfaces must be a minimum of 0.500 in. (12.7 mm) from any pit on adjacent surfaces that are not functional

          1. Accept

          3. Other than Step or Step

          1. Repair, VRS3476 TASK 72-32-25-300-017 (REPAIR-017)

      4. Examine the seal seat at location 2, 3 and 4 for scratched hardface.

        1. Scratches.

          1. Any quantity of scratches that are not on the sealing surface

          1. Accept

          2. Other than Step

          1. Repair, VRS3475 TASK 72-32-25-300-016 (REPAIR-016)

      5. Examine the seal seat at location 2 and 4 for hardface that is not there.

        1. Hardface that is not there.

          1. If the area is a maximum of 0.040 in. (1.016 mm) from the inner edge at location 4 and the outer edge at location 2

          1. Accept

          2. Other than Step

          1. Repair, VRS3476 TASK 72-32-25-300-017 (REPAIR-017)

    3. SUBTASK 72-32-25-220-082 Examine the No. 3 Bearing Seal Seat (02-400) for Nicks, Dents, Scratches and Pits on Areas Other than the Hardface

    1. Refer to Figure.

      2. Examine the seal seat for nicks, dents, scratches and pits on areas other than the hardface.

        1. Nicks, dents, scratches and pits.

          1. If the depth is not more than 0.020 in. (0.508 mm), the width is not more than 0.050 in. (1.27 mm), and there is no high metal

          1. Accept

          2. Other than Step

          1. Reject

    4. SUBTASK 72-32-25-220-083 Examine the No. 3 Bearing Seal Seat (02-400) for Blocked Oil Holes

    1. Refer to Figure.

      2. Examine the seal seat at location 1 and 7 for blocked oil holes.

        1. Blocked oil holes

        1. Clean, TASK 72-32-25-100-000 (CLEANING-000)

    5. SUBTASK 72-32-25-220-084 Examine the No. 3 Bearing Seal Seat (02-400) for the Surface Finish and the Flatness of the Hardface

    1. Refer to Figure.

      2. Examine the seal seat at location 2, 3 and 4 for the surface finish of all the hardface areas.

        1. If the surface finish is other than the finish given in the figure

        1. Repair, VRS3475 TASK 72-32-25-300-016 (REPAIR-016)

      3. Use an optical flat measuring tool to examine the seal seat at location 2, 3 and 4 for flatness of the hardface.

        1. If the part is not flat by 0.00002 in. (0.0005 mm)

        1. Repair, VRS3475 TASK 72-32-25-300-016 (REPAIR-016)

    6. SUBTASK 72-32-25-220-085 Examine the No. 3 Bearing Seal Seat (02-400) for the Thickness of the Hardface

    1. Refer to Figure.

      2. Use a Magna Gage or equivalent to measure the thickness of the hardface at location 3.

        1. Thickness.

          1. If the thickness is between 0.004 and 0.006 in. (0.102 and 0.152 mm)

          1. Accept

          2. Other than Step

          1. Repair, VRS3476 TASK 72-32-25-300-017 (REPAIR-017)

    7. SUBTASK 72-32-25-220-086 Examine the No. 3 Bearing Seal Seat (02-400) for the Pilot Inner Diameter

    1. Refer to Figure.

      2. Examine the seal seat at location 6 for the pilot inner diameter.

        1. Inner diameter.

          1. If the diameter is between 5.896 and 5.898 in. (149.759 and 149.809 mm)

          1. Accept

          2. Other than Step

          1. Repair, VRS3478 TASK 72-32-25-300-019 (REPAIR-019)

    8. SUBTASK 72-32-25-220-087 Examine the No. 3 Bearing Seal Seat (02-400) for the Axial Dimension

    1. Refer to Figure.

      2. Examine the seal seat at location 5 for the axial dimension.

        1. Axial dimension.

          1. If the dimension is between 0.569 and 0.571 in. (14.453 and 14.503 mm)

          1. Accept

          2. Other than Step

          1. Reject

    9. Figure: No. 3 Bearing Seal Seat Inspection Locations

    No. 3 Bearing Seal Seat Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the SPM Task for MPI (Editorial)

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:23373
Enterprise Name:CHEMETALL OAKITE
BU Name:CHEMETALL OAKITE
Street:16961 KNOTT AVENUE
City:LA MIRADA
State:CA
Zip Code:90638
Country:USA
Phone Number:1-714-739-2821, 1-800-331-1197
Fax Number:1-714-670-6480
Internet:www.oakite.com
Manufacturer Code:2H517
Enterprise Name:DELETED. SEE CAGE CODE 2R128
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 01-077
Type:sp01
Supply Short Name:CoMat 01-077 NICKEL CHLORIDE NiCl2+6H2O
Supply Name:CoMat 01-077 NICKEL CHLORIDE NiCl2+6H2O
Specification Groups:
Doc NumberType
OMAT: 1/47 (RR REF)GPR
Suppliers:
ManufacturerRemarks
LOCAL
U1185
K6835
24853
Manufacturer Code:23373
Supply Number:CoMat 01-177
Type:sp01
Supply Short Name:CoMat 01-177 PETROLEUM (SOLVENT)
Supply Name:CoMat 01-177 PETROLEUM (SOLVENT)
Specification Groups:
Doc NumberType
PMC 9010ARDROX 5412
JCR-107ARDROX 5412
Suppliers:
ManufacturerRemarks
23373
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:X111X
Supply Number:CoMat 12-015
Type:sp01
Supply Short Name:CoMat 12-015 CORROSION PREVENTIVE, FINGERPRINT REMOVER
Supply Name:CoMat 12-015 CORROSION PREVENTIVE, FINGERPRINT REMOVER
Specification Groups:
Doc NumberType
DELETED. USE COMAT 10-017.
Suppliers:
ManufacturerRemarks
X111X
Manufacturer Code:X111X
Supply Number:CoMat 12-016
Type:sp01
Supply Short Name:CoMat 12-016 CORROSION PREVENTIVE THIN FILM
Supply Name:CoMat 12-016 CORROSION PREVENTIVE THIN FILM
Specification Groups:
Doc NumberType
DELETED. USE COMAT 10‐017.
Suppliers:
ManufacturerRemarks
X111X
Manufacturer Code:LOCAL
Tool Number:Magna Gage
Tool Name:Magna Gage