TASK 72-50-52-200-002 No. 5 Roller Bearing - Examine, Inspection-002

DMC:V2500-A0-72-50-5201-00A-300A-C|Issue No:003.00|Issue Date:2014-08-01

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 72-50-52-200-002 No. 5 Roller Bearing - Examine, Inspection-002

Effectivity

FIG/ITEM

PART NO.

20-060

2A2136

20-060

2A2255

General

This TASK gives the procedure for the inspection of the No. 5 roller bearing. For the other parts of the No. 5 bearing plate and oil deflector, refer to TASK 72-50-52-200-000.

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 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 completely 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.

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

Inspection of Parts, SPM TASK 70-02-01-200-501

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Rockwell Hardness TesterLOCALRockwell Hardness Tester

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-52-220-057 Examine the No. 5 Roller Bearing (20-060) for Defects

    1. Refer to Figure.

      2. Examine the bearing for defects

      1. Refer to the SPM TASK 70-29-01-290-501

        2. Defects

        1. Repair, VRS3657 TASK 72-50-52-300-009 (REPAIR-009)

    2. SUBTASK 72-50-52-220-058 Examine the No. 5 Roller Bearing (20-060) for the Width of the Outer Race

    1. Refer to Figure.

      2. Examine the bearing at location 1 for the width of the outer race.

        1. Width is between 1.0155 and 1.0157 in. (25.794 and 25.799 mm)

        1. Accept

        2. Other than in (1)

        1. Repair, VRS3657 TASK 72-50-52-300-009 (REPAIR-009)

    3. SUBTASK 72-50-52-220-059 Examine the No. 5 Roller Bearing (20-060) for the Outside Diameter

    1. Refer to Figure.

      2. Examine the bearing at location 2 for the outside diameter.

        1. The outside diameter is between 5.5110 and 5.5118 in. (139.979 and 140.000 mm)

        1. Accept

        2. Other than (1)

        1. Repair, VRS3657 TASK 72-50-52-300-009 (REPAIR-009)

    4. SUBTASK 72-50-52-220-060 Examine the No. 5 Roller Bearing (20-060) for the Inside Diameter

    1. Refer to Figure.

      2. Examine the bearing at location 3 for the inside diameter.

        1. The inside diameter is between 3.6217 and 3.6220 in. (91.991 and 91.999 mm)

        1. Accept

        2. Other than (1)

        1. Repair, VRS3657 TASK 72-50-52-300-009 (REPAIR-009)

    5. SUBTASK 72-50-52-220-061 Examine the No. 5 Roller Bearing (20-060) for the Internal Radial Clearance

      1. Examine the bearing for the internal radial clearance.

        1. The internal radial clearance is between 0.0016 and 0.0026 in. (0.041 and 0.066 mm) under a 33 pound radial gage load

        1. Accept

        2. Other than (1)

        1. Repair, VRS3657 TASK 72-50-52-300-009 (REPAIR-009)

    6. SUBTASK 72-50-52-220-062 Examine the No. 5 Roller Bearing (20-060) for the Hardness of the Races

      NOTE

      Only do the hardness check if the bearing shows signs of high temperature discoloration.

      1. Use a Rockwell Hardness Tester or equivalent to examine check the hardness of the inner and outer races of the bearing. Do the hardness check on a non-functional surface so that hardened surfaces will not be penetrated.

        1. The hardness of the inner and outer races is 60 to 62 HRC Average, 59 to 63 HRC Absolute or equivalent

        1. Accept

        2. Other than in (1)

        1. Reject

    7. Figure: No. 5 Roller Bearing Inspection Locations

    No. 5 Roller Bearing Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Editorial correction due to conversion

Change Type:

Modified the procedure. (PSAF13VC362)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
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