TASK 72-43-11-200-001-A00 No. 4 Bearing Front Seal Seat - Examine, Inspection-001

DMC:V2500-A1-72-43-1100-00A-310A-C|Issue No:003.00|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

V2500-A1

Common Information

TASK 72-43-11-200-001-A00 No. 4 Bearing Front Seal Seat - Examine, Inspection-001

Effectivity

FIG/ITEM PART NO.

01-010

2A0066

General

This TASK gives the procedures for the inspection of the No. 4 bearing front seal seat.

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

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 gage

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-43-11-240-051 Examine the No. 4 Bearing Front Seal Seat (01-010) 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 72-43-11-100-000.

      2. Do the crack test on the part that is given below. Use the applicable magnetic particle procedure with a copper rod 0.75in. (19.05 mm) in diameter and 6.00in. (152.4 mm) in length with 1500-2500 amperage.

        PART IDENT

        TASK/OP

        No. 4 bearing front seal seat

        SUBTASK 70-24-01-240-011

        1. Cracked

        1. Reject

    2. SUBTASK 72-43-11-220-051 Examine the No. 4 Bearing Front Seal Seat (01-010) for Chipped Hardface

    1. Refer to Figure

      2. Examine the seal seat at locations 1, 2, 3 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, VRS3102 TASK 72-43-11-300-002 (REPAIR-002) or Repair, VRS3693 TASK 72-43-11-300-005 (REPAIR-005)

      3. Examine the seal seat at location 4 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, VRS3102 TASK 72-43-11-300-002 (REPAIR-002) or Repair, VRS3693 TASK 72-43-11-300-005 (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, VRS3102 TASK 72-43-11-300-002 (REPAIR-002) or Repair, VRS3693 TASK 72-43-11-300-005 (REPAIR-005)

    3. SUBTASK 72-43-11-220-052 Examine the No. 4 Bearing Front Seal Seat (01-010) 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, VRS3102 TASK 72-43-11-300-002 (REPAIR-002) or Repair, VRS3693 TASK 72-43-11-300-005 (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, VRS3102 TASK 72-43-11-300-002 (REPAIR-002) or Repair, VRS3693 TASK 72-43-11-300-005 (REPAIR-005)

      4. Examine the seal seat for hardface that is gone.

        1. Hardface that is gone.

          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 gone will show as a dark line

          1. Accept

          2. Other than (a)

          1. Repair, VRS3102 TASK 72-43-11-300-002 (REPAIR-002) or Repair, VRS3693 TASK 72-43-11-300-005 (REPAIR-005)

    4. SUBTASK 72-43-11-220-053 Examine the No. 4 Bearing Front Seal Seat (01-010) 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 if not more than 0.020in. (0.51 mm), the width is not more than 0.050in. (1.27 mm) and there is no high metal

          1. Accept

          2. Other than (a)

          1. Reject

    5. SUBTASK 72-43-11-220-054 Examine the No. 4 Bearing Front Seal Seat (01-010) for Blocked Oil Holes

    1. Refer to Figure

      2. Examine the seal seat at locations 1, 3 and 5 for blocked oil holes.

        1. Blocked oil holes

          1. Clean, TASK 72-43-11-100-000 (CLEANING-000).

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

      3. Examine the seal seat at location 2 for blocked oil slots.

        1. Blocked oil slots

          1. Clean, TASK 72-43-11-100-000 (CLEANING-000).

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

    6. SUBTASK 72-43-11-220-055 Examine the No. 4 Bearing Front Seal Seat (01-010) 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. If the surface is other than the finish given in the figure

        1. Repair, VRS3693 TASK 72-43-11-300-005 (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, VRS3693 TASK 72-43-11-300-005 (REPAIR-005)

    7. SUBTASK 72-43-11-220-056 Examine the No. 4 Bearing Front Seal Seat (01-010) for the Pilot Inside Diameter

    1. Refer to Figure

      2. Examine the seal seat at location 2 for the pilot inside diameter (Reference No. 2229).

        1. Inside diameter.

          1. If the diameter is between 5.131 and 5.133 in (130.33 and 130.38 mm)

          1. Accept

          2. Other than (a)

          1. Repair, VRS3103 TASK 72-43-11-300-003 (REPAIR-003)

    8. SUBTASK 72-43-11-220-057 Examine the No. 4 Bearing Front Seal Seat (01-010) for the Axial Dimension

    1. Refer to Figure

      2. Examine the seal seat at location 3 for the axial dimension.

        1. Axial dimension.

          1. If the dimension is between 0.076 and 0.078in. (1.93 and 1.98 mm)

          1. Accept

          2. Other than (a)

          1. Repair, VRS3102 TASK 72-43-11-300-002 (REPAIR-002) or Repair, VRS3693 TASK 72-43-11-300-005 (REPAIR-005)

    9. SUBTASK 72-43-11-220-058 Examine the No. 4 Bearing Front Seal Seat (01-010) for the Thickness of the Hardface

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

        1. Thickness.

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

          1. Accept

          2. Other than (a)

          1. Reject

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

    No. 4 bearing front seal seat inspection locations

    Figure: No. 4 bearing front seal seat inspection locations

    No. 4 bearing front seal seat inspection locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Deleted repair reference VRS3101 and added VRS3693. (15VC450)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
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