TASK 72-50-42-200-001-B00 No. 5 Bearing Face Seal - Examine, Inspection-001

DMC:V2500-A0-72-50-4202-00B-300A-C|Issue No:002.00|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 72-50-42-200-001-B00 No. 5 Bearing Face Seal - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

20-140

2A1214

20-140

2A1215

20-140

2A1216

20-140

2A2878

20-140

2A2879

General

This TASK gives the procedure for the inspection of the No. 5 bearing face seal. For other parts of the No. 5 bearing assembly and seal, refer to TASK 72-50-42-200-000 (INSPECTION-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.

A ** following repair referenced in this inspection indicates that the repair is not yet published in the current revision of the manual and the part must be rejected. Contact IAE for additional information concerning FAA approved repair date.

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, TASK 70-02-02-350-501

Inspection of Parts, 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
Circular gageLOCALCircular gage

the inside diameter of the gage and the gage diameter of the seal must be in + 0.0005in. (+ 0.013 mm)

40-watt lampLOCAL40-watt lamp

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-42-220-054 Examine the No. 5 Bearing Face Seal (20-140) for Cracks

      1. Examine the face seal for cracks.

        1. Cracks

        1. Reject

    2. SUBTASK 72-50-42-220-055 Examine the No. 5 Bearing Face Seal (20-140) for Scratches, Nicks, Gouges and Pits

    1. Refer to Figure.

      2. Examine the face seal at location 1, 2 and 4 for defects.

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

        1. Accept

        2. Other than (1)

        1. Reject

    3. SUBTASK 72-50-42-220-056 Examine the No. 5 Bearing Face Seal (20-140) for the Surface Finish

    1. Refer to: Figure

      2. Examine the sides of the face seal at locations 2 and 4 for the surface finish.

        1. If the surface finish is in the limits given in the figure

        1. Accept

        2. Other than (1)

        1. Repair, VRS3146 TASK 72-50-42-300-001 (REPAIR-001)**

    4. SUBTASK 72-50-42-220-057 Examine the No. 5 Bearing Face Seal (20-140) for the Width

    1. Refer to: Figure

      2. Examine the face seal at location 3 for the width.

        1. If the width is 0.752 to 0.756 in. (19.101 to 19.202 mm)

        1. Accept

        2. Other than (1)

        1. Reject

    5. SUBTASK 72-50-42-220-058 Examine the No. 5 Bearing Face Seal (20-140) for the Width of the End Gap

    1. Refer to: Figure

      2. Examine the face seal at location 6 for the width of the end gap. Constrain the seal at location 1 only so the diameter at location 5 is 5.198in. (132.029 mm).

        1. If the width of the end gap is 0.012 to 0.022 in. (0.30 to 0.56 mm)

        1. Accept

        2. Other than (1)

        1. Reject

    6. SUBTASK 72-50-42-220-059 Examine the No. 5 Bearing Face Seal (20-140) for Light Tightness

      1. Use a circular gage and a 40-watt lamp to examine the face seal for light tightness.

        1. If no less than 85 per cent of the seal is light-tight

        1. Accept

        2. Other than (1)

        1. Reject

    7. Figure: No. 5 Bearing Face Seal Inspection Locations

    No. 5 Bearing Face Seal Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Editorial correction due to conversion

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:40-watt lamp
Tool Name:40-watt lamp
Manufacturer Code:LOCAL
Tool Number:Circular gage
Tool Name:Circular gage