TASK 72-32-25-200-001 No. 3 Bearing Face Seal - Examine, Inspection-001

DMC:V2500-A0-72-32-2502-00A-300A-C|Issue No:001.00|Issue Date:2013-11-01

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 72-32-25-200-001 No. 3 Bearing Face Seal - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

02-150

2A1786

02-150

2A3854

02-150

2A4286

General

This TASK gives the procedure for the inspection of the No. 3 bearing face seal. 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.

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

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-32-25-220-065 Examine the No. 3 Bearing Face Seal (02-150) for Worn, Chipped or Loose Chrome Plate on the Sides of the Anti-Rotation Slots (with or without Bushing)

    1. Refer to Figure.

      2. Examine the seal at location 1 for worn, chipped or loose chrome plate on the sides of the anti-rotation slots.

        1. If chipped areas on the edge of the plated faces extend no more than 0.469 in. (1.19 mm) from either edge. The number of chipped areas is not important if at least 75 per cent of each edge shows no chipping

        1. Accept

        2. Other than Step: Chrome plate that is worn to the base metal, chipped beyond Step or loose

        1. Repair, VRS3404 TASK 72-32-25-300-008 (REPAIR-008)

        3. Wear that extends into base metal

        1. Repair, VRS3546 TASK 72-32-25-300-026 (REPAIR-026) or Repair, VRS3751 TASK 72-32-25-300-028 (REPAIR-028)

    2. SUBTASK 72-32-25-220-066 Examine the No. 3 Bearing Face Seal (02-150) Spring Guides for Looseness or Wear on the Outside Diameter

    1. Refer to Figure.

      2. Examine the seal spring guides at location 2 for looseness or wear on the outside diameter (12 locations).

        1. Looseness or wear

        1. Repair, VRS3394 TASK 72-32-25-300-009 (REPAIR-009)

    3. SUBTASK 72-32-25-220-067 Examine the No. 3 Bearing Face Seal (02-150) for Damage on the Hardface of the Housing Detail Inside Diameter

    1. Refer to Figure.

      2. Examine the seal housing detail inside diameter at location 3 for looseness of the bond.

        1. Looseness

        1. Repair, VRS3395 TASK 72-32-25-300-010 (REPAIR-010) or Repair, VRS3734 TASK 72-32-25-300-027 (REPAIR-027)

      3. Examine the seal housing detail inside diameter at location 3 for defects.

        1. Defects.

          1. The time limits in SPM TASK 70-21-04-100-501 are met

          1. Accept

          2. Other than Step

          1. Repair, VRS3395 TASK 72-32-25-300-010 (REPAIR-010) or Repair, VRS3734 TASK 72-32-25-300-027 (REPAIR-027)

    4. SUBTASK 72-32-25-220-068 Examine the No. 3 Bearing Face Seal (02-150) for Damage on the Carbon Seal Detail

    1. Refer to Figure.

      2. Examine the seal at all locations for cracks in the carbon seal detail. Refer to the SPM TASK 70-21-04-100-501.

        1. Cracks

        1. Repair, VRS3393 TASK 72-32-25-300-007 (REPAIR-007)

      3. Examine the seal for defects on the carbon seal detail.

        1. Defects.

          1. The limits in the SPM TASK 70-21-04-100-501 are met

          1. Accept

          2. Other than Step

          1. Repair, VRS3393 TASK 72-32-25-300-007 (REPAIR-007) or Repair, VRS3397 TASK 72-32-25-300-006 (REPAIR-006)

    5. SUBTASK 72-32-25-220-069 Examine the No. 3 Bearing Face Seal (02-150) for Wear on the Hardface of the Housing Detail Inside Diameter

    1. Refer to Figure.

      2. Examine the seal at location 1 for wear on the hardface of the housing detail inside diameter.

        1. Wear.

          1. If the dimension is a minimum of 0.460 in. (11.684 mm)

          1. Accept

          2. Other than Step

          1. Repair, VRS3395 TASK 72-32-25-300-010 (REPAIR-010) or Repair, VRS3734 TASK 72-32-25-300-027 (REPAIR-027)

    6. SUBTASK 72-32-25-220-070 Examine the No. 3 Bearing Face Seal (02-150) for the Diameter, Roundness and Perpendicularity of the Hardface on the Housing Detail Inside Diameter

    1. Refer to Figure.

      2. Examine the seal at location 2 for the inside diameter of the housing detail hardface area.

        1. Inside diameter.

          1. If the diameter is between 6.990 and 6.992 in. (177.55 and 177.60 mm)

          1. Accept

          2. Other than Step

          1. Repair, VRS3395 TASK 72-32-25-300-010 (REPAIR-010)

      3. Examine the seal at location 2 for the roundness and the perpendicularity of the hardface on the housing detail inside diameter.

        1. Roundness and perpendicularity.

          1. If the inside diameter is round by 0.004 in. (0.10 mm) and perpendicular to Surface A by 0.001 in. (0.03 mm)

          1. Accept

          2. Other than Step

          1. Repair, VRS3395 TASK 72-32-25-300-010 (REPAIR-010) or Repair, VRS3393 TASK 72-32-25-300-007 (REPAIR-007)

    7. SUBTASK 72-32-25-220-071 Examine the No. 3 Bearing Face Seal (02-150) for the Height of the Carbon Seal Lip

    1. Refer to: Figure

      2. Examine the seal at location 3 for the height of the carbon seal lip.

        1. Height.

          1. If the height is between 0.100 in. and 0.110 in. (2.54 mm and 2.79 mm)

          1. Accept

          2. Other than Step

          1. Repair, VRS3393 TASK 72-32-25-300-007 (REPAIR-007)

    8. SUBTASK 72-32-25-220-072 Examine the No. 3 Bearing Face Seal (02-150) for the Surface Finish of the Carbon Seal Face

    1. Refer to Figure.

      2. Examine the seal at location 4 for the surface finish of the carbon seal face.

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

        1. Repair, VRS3397 TASK 72-32-25-300-006 (REPAIR-006)

    9. SUBTASK 72-32-25-220-073 Examine the No. 3 Bearing Face Seal (02-150) for the Flatness of the Carbon Seal Face

    1. Refer to Figure.

      2. CAUTION

        DO THIS INSPECTION AFTER YOU HAVE DONE ALL THE OTHER INSPECTIONS IN THIS TASK. YOU CAN CAUSE DAMAGE TO THE SEAL FACE IF YOU TOUCH THE SEAL TOO FREQUENTLY.

        Use an optical flat measuring tool to examine the seal at location 4 for the flatness of the carbon seal face.

        1. If the seal face is not the flatness given in the figure

        1. Repair, VRS3397 TASK 72-32-25-300-006 (REPAIR-006)

    10. SUBTASK 72-32-25-220-111 Examine the No. 3 Bearing Face Seal (02-150) for Wear/Damage on the Sides of the Anti-Rotation Slots (with or without Bushing)

    1. Refer to Figure.

      2. Examine the seal at location 5 for the slot width.

        1. If the slot width is 0.346 to 0.352 in. (8.79 to 8.94 mm)

        1. Accept

        2. Other than Step

        1. Repair, VRS3751 TASK 72-32-25-300-028 (REPAIR-028)

    11. Figure: No. 3 Bearing Face Seal Inspection Locations

    No. 3 Bearing Face Seal Inspection Locations

    Figure: No. 3 Bearing Face Seal Inspection Locations

    No. 3 Bearing Face Seal Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE