TASK 72-43-14-200-001-A00 No. 4 Bearing Rear Seal Seat - Examine, Inspection-001

DMC:V2500-A0-72-43-1400-00A-310A-C|Issue No:004.00|Issue Date:2015-11-01

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 72-43-14-200-001-A00 No. 4 Bearing Rear Seal Seat - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-020

2A0067

General

This TASK gives the procedure for the inspection of the No. 4 bearing rear seal seat. For the other parts of the No. 4 bearing rear seal seat, refer to TASK 72-43-14-200-000 (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 examined.

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

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

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 for Moderate Cleaning, SPM TASK 70-11-03-300-503

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

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

NOTE

To identify the consumable materials refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Magna gageLOCALMagna gage

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

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-43-14-240-051 Examine the No. 4 Bearing Rear Seal Seat (01-020) for Cracks

      NOTE

      After you clean the part, the hardface area can change color or become tracked. These conditions are permitted.

    1. Clean the part. Refer to TASK 72-43-14-100-001 (CLEANING-001, CONFIG-001).

    2. Do the test for cracks on the No. 4 bearing rear seal seat.

    3. If necessary, moderately clean the part by the procedure given in the SPM TASK 70-11-03-300-503 or vapor degrease the part 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, SUBTASK 70-24-01-240-011.

        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 part completely with iron oxide.

        2. Examine the part 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 4.00in. (101.6 mm) diameter soft iron core. Use the manual or fixture method. Refer to the SPM TASK 70-24-01-240-501, SUBTASK 70-24-01-240-016.

        1. The manual method.

        1. Wrap three turn 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 part completely with iron oxide.

        2. The fixture method.

        1. Center the part 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 part completly with iron oxide.

        3. Examine the part for cracks.

          1. Cracked

          1. Reject

    6. Demagnetize the part.

    2. SUBTASK 72-43-14-220-051 Examine the No. 4 Bearing Rear Seal Seat (01-020) for Chipped Hardface

    1. Refer to Figure

      2. Examine the seal seat at locations 1, 2, 4 and 5 for chipped hardface.

        1. Chips.

          1. Any quantity that is less than 0.015 in. (0.38 mm) from the edges of the oil slots or grooves

          1. Accept

          2. No more than 15 chips are a maximum of 0.020 in. (0.51 mm) long circumferentially. These chips must be no less than 0.125 in. (3.18 mm) from each other

          1. Accept

          3. Other than (a) and (b)

          1. Repair, VRS3108 TASK 72-43-14-300-002 (REPAIR-002) or Repair, VRS3694 TASK 72-43-14-300-005 (REPAIR-005)

      3. Examine the seal seat at location 3 for chipped hardface at the opposite edges of the slots and grooves.

        1. Chips.

          1. Any quantity of chips if the total width of the chips is less than 50 percent of the distance between the slot and the groove

          1. Accept

          2. Other than (a)

          1. Repair, VRS3108 TASK 72-43-14-300-002 (REPAIR-002) or Repair, VRS3694 TASK 72-43-14-300-005 (REPAIR-005)

      4. Examine the seal seat at the inner and outer edges at locations 6 and 7, for chipped hardface.

        1. Chips.

        1. Any quantity that is less than 0.015 in. (0.38 mm) from the inner and outer edges of the hardface

          2. No more than 15 chips are a maximum of 0.020 in. (0.51 mm) long circumferentially. These chips must be no less than 0.125 in. (3.18 mm) from each other

          1. Accept

          3. Other than (a) and (b)

          1. Repair, VRS3108 TASK 72-43-14-300-002 (REPAIR-002) or Repair, VRS3694 TASK 72-43-14-300-005 (REPAIR-005)

    3. SUBTASK 72-43-14-220-052 Examine the No. 4 Bearing Rear Seal Seat (01-020) for Hardface that is Pitted, Scratched or Gone

    1. Refer to Figure

      2. Examine the seal seat for pitted hardface.

        1. Pits.

          1. A maximum of six pits. Any three pits can be as much as 0.010 in. (0.25 mm) if they are clearly apart

          1. Accept

          2. A maximum of six pits. Any one pit can be as much as 0.030 in. (0.78 mm). There must be 1 in. (25.4 mm) minimum distance between pits that are more than 0.010 in. (0.25 mm). Pits on functional surfaces must be a minimum of 0.500 in. (12.70 mm) from any pit on adjacent surfaces that are not functional

          1. Accept

          3. Other than (a) or (b)

          1. Repair, VRS3108 TASK 72-43-14-300-002 (REPAIR-002) or Repair, VRS3694 TASK 72-43-14-300-005 (REPAIR-005)

      3. Examine the seal seat for scratched hardface.

        1. Scratches.

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

          1. Accept

          2. Other than (a)

          1. Repair, VRS3108 TASK 72-43-14-300-002 (REPAIR-002) or Repair, VRS3694 TASK 72-43-14-300-005 (REPAIR-005)

      4. Examine the seal seat for hardface that is not there.

        1. Hardface that is not there.

          1. If the area is a maximum of 0.040 in. (1.02 mm) from the inner edge at location 6 and the outer edge at location 7. Hardface that is not there will show as a dark line

          1. Accept

          2. Other than (a)

          1. Repair, VRS3108 TASK 72-43-14-300-002 (REPAIR-002) or Repair, VRS3694 TASK 72-43-14-300-005 (REPAIR-005)

    4. SUBTASK 72-43-14-220-053 Examine the No. 4 Bearing Rear Seal Seat (01-020) for Nicks, Dents, Scratches and Pits on Areas Other than the Hardface

      1. 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. (0.51 mm), the width is not more than 0.050 in. (1.27 mm), and there is no high metal

          1. Accept

          2. Other than (a)

          1. Reject

    5. SUBTASK 72-43-14-220-054 Examine the No. 4 Bearing Rear Seal Seat (01-020) for Blocked Oil Holes

    1. Refer to Figure

      2. Examine the seal seat at locations 1, 2 and 4 for blocked oil holes.

        1. Blocked oil holes

          1. Clean, TASK 72-43-14-100-001 (CLEANING-001, CONFIG-001).

          1. Holes must be cleaned, blockage is not permitted.

      3. Examine the seal seat at location 5 for blocked oil slots.

        1. Blocked oil slots

          1. Clean, TASK 72-43-14-100-001 (CLEANING-001, CONFIG-001).

          1. Slots must be cleaned, blockage is not permitted.

    6. SUBTASK 72-43-14-220-055 Examine the No. 4 Bearing Rear Seal Seat (01-020) for Surface Finish and the Flatness of the Hardface

    1. Refer to Figure

      2. Examine the seal seat at location 1 for the surface finish of the hardface.

        1. The surface finish limit must be as given in the figure

        1. Repair, VRS3694 TASK 72-43-14-300-005 (REPAIR-005)

      3. Use an optical flat measuring tool to examine the seal seat at location 1 for flatness.

        1. If the part is not flat by 0.00002 in. (0.00051 mm)

        1. Repair, VRS3694 TASK 72-43-14-300-005 (REPAIR-005)

    7. SUBTASK 72-43-14-220-056 Examine the No. 4 Bearing Rear Seal Seat (01-020) for the Axial Dimension

    1. Refer to Figure

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

        1. Axial dimension.

          1. If the dimension is between 0.459 in. and 0.461 in. (11.66 mm and 11.71 mm)

          1. Accept

          2. Other than (a)

          1. Repair, VRS3108 TASK 72-43-14-300-002 (REPAIR-002) or Repair, VRS3694 TASK 72-43-14-300-005 (REPAIR-005)

    8. SUBTASK 72-43-14-220-057 Examine the No. 4 Bearing Rear Seal Seat (01-020) for the Pilot Inside Diameter

    1. Refer to Figure

      2. Examine the seal seat at location 2226 for the pilot inside diameter.

        1. Inside diameter.

          1. If the diameter is between 5.111 in. and 5.113 in. (129.82 mm and 129.87 mm)

          1. Accept

          2. Other than (a)

          1. Repair, VRS3109 TASK 72-43-14-300-003 (REPAIR-003)

    9. SUBTASK 72-43-14-220-058 Examine the No. 4 Bearing Rear Seal Seat (01-020) for the Thickness of the Hardface

      1. Use magna gage to measure the thickness of the hardface.

        1. Thickness.

          1. If the thickness is between 0.002 in. and 0.004 in. (0.051 mm and 0.102 mm)

          1. Accept

          2. Other than (a)

          1. Reject

    10. Figure: No. 4 bearing rear seal seat inspection locations

    No. 4 bearing rear seal seat inspection locations

    Figure: No. 4 bearing rear seal seat inspection locations

    No. 4 bearing rear seal seat inspection locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Deleted the repair reference VRS3107 and added VRS3694. (15VC450)

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: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
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