TASK 72-32-54-200-004 No. 1 Bearing - Examine, Inspection-004

DMC:V2500-A0-72-32-5404-00A-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 72-32-54-200-004 No. 1 Bearing - Examine, Inspection-004

Effectivity

FIG/ITEM PART NO.

01-150

5A7968

01-150

5A7969

General

This TASK gives the procedure for the inspection of the No.1 ball bearing assembly.

The policy that is necessary for inspection is given in the SPM TASK 70-20-01-200-501.

All the parts must be cleaned before any part is examined. Refer to TASK 72-32-54-100-000 (CLEANING-000).

All the 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 the 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.

Bearings failing inspection may not be repaired or refurbished if:

They have been subjected to overheating because of loss of oil, the inner ring spinning on its hub, a compartment fire, or skidding.

They were involved in a major engine failure.

References

Refer to the SPM for data on these items.

Definition of Damages, SPM TASK 70-29-01-290-501

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

Some data on these items are contained in this TASK. For more data on these items refer to the SPM.

Chemical Processes

Surface Protection

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
IAE 2J12614 Gage, contact angle0AM53IAE 2J126141

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-32-54-110-056 Clean the No. 1 Ball Bearing (01-150)

    1. Clean the bearing and its components. Refer to TASK 72-32-54-100-000 (CLEANING-000).

    2. SUBTASK 72-32-54-220-058 Visually Examine the No. 1 Ball Bearing (01-150) for Surface Damage

    1. Refer to Figure.

    2. Visually examine, without magnification, the bearing and its components, checking in particular for defects as shown in the SPM TASK 70-29-01-290-501.

    3. Examine oil slits on parting face of inner rings to ensure they are open. Remove any obstruction which may be present.

    4. Surface damages on the race ways of inner and outer ring are not accepted.

    3. SUBTASK 72-32-54-200-059 Examine the No. 1 Ball Bearing (01-150) Diameter at Location 0110 and 0301

    1. Refer to Figure and Figure.

      2. Worn at location 0301.

        1. If the diameter is between 12.7947 and 12.7952 in. (324.985 and 325.000 mm)

        1. Accept

        2. Write down the dimension of the diameter.

        2. Less than 12.7947 in. (324.985 mm)

        1. Reject

      3. Worn at location 0110.

        1. If the diameter is between 8.6610 and 8.6614 in. (219.988 and 220.000 mm)

        1. Accept

        2. Write down the dimension of the diameter.

        2. More than 8.6614 in. (220.000 mm)

        1. Reject

    4. SUBTASK 72-32-54-220-061 Examine the No.1 Ball Bearing (01-150)

    1. Refer to Figure and Figure.

      2. Examine the contact angle under 44 lbf (20 kgf) gage load. Use IAE 2J12614 Gage, contact angle 1 off.

        1. If the contact angle is as follows.

          1. 5A7968: 26 to 30 degrees

          1. Accept

          2. 5A7969: 29.35 to 32.15 degrees

          1. Accept

        2. Out of Step

        1. Reject

    3. Deleted.

      4. Examine the internal radial clearance at three points 120 degrees apart, under 33 lbf (15 kgf) gage load.

        1. If the clearance is as follows.

          1. 5A7968: 0.0077 to 0.0088 in. (0.195 to 0.225 mm)

          1. Accept

          2. 5A7969: 0.0097 to 0.0107 in. (0.244 to 0.274 mm)

          1. Accept

        2. Out of Step

        1. Reject

    5. SUBTASK 72-32-54-220-060 Hardness Check the No. 1 Ball Bearing (01-150)

    1. NOTE

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

      Refer to Figure.

      2. Check the outer ring and inner ring shows signs of having been overheated. Check must be made at location which is marked H on Figure. use a ROCKWELL "A" (HRA) TESTER.

        1. If the hardness is between HRA 81.8 and 83.4

        1. Accept

        2. Out of Step

        1. Reject

        2. Remove raised metal of the ring accepted.

    6. SUBTASK 72-32-54-620-052 Prevent Damage to the No. 1 Ball Bearing (01-150)

    1. Clean the bearing by dipping in the compound. Refer to the SPM TASK 70-29-01-290-501.

    2. Prevent damage to the bearing in an assembled state by dipping in the compound.

    7. Figure: No. 1 ball bearing assembly

    No. 1 ball bearing assembly

    Figure: No. 1 ball bearing assembly

    No. 1 ball bearing assembly

Requirements After Job Completion

Follow-On Conditions

NONE
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:0AM53
Tool Number:IAE 2J12614
Tool Name:IAE 2J12614 Gage, contact angle