TASK 72-42-35-200-001 No. 4 Bearing Front Cooling Duct - Examine, Inspection-001

DMC:V2500-A0-72-42-3500-00A-300A-B|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 72-42-35-200-001 No. 4 Bearing Front Cooling Duct - Examine, Inspection-001

Effectivity

FIG/ITEM PART NO.

01-010

2A0892-01

01-010

2A0892-001

01-010

2A2257-01

01-010

2A3810-01

General

This TASK gives the procedure for the inspection of the No. 4 bearing front cooling duct.

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 SUBTASK 72-42-35-230-051. Do the test before the part is visually examined.

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, SPM TASK 70-02-02-350-501

Inspection of Parts, SPM TASK 70-20-00-200-501

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

Method of Testing for Crack Indications

Chemical Processes

Surface Protection

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 10-130 ANTIGALLING COMPOUND8F024CoMat 10-130

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-42-35-230-051-001 Examine the No. 4 Bearing Front Cooling Duct (01-010) for Cracks

      NOTE

      Make sure that the antigalling compound is fully removed from the spacer threads.

    1. Clean the part. Refer to TASK 72-42-35-100-000 (CLEANING-000).

      2. Do the test for cracks on the part that is given below. Use the applicable penetrant procedures.

        PART IDENT

        TASK/SUBTASK

        No. 4 bearing front cooling duct

        (Dip or spray)

        1. Cracked

        1. Repair, VRS3300 TASK 72-42-35-300-001 (REPAIR-001)

        2. Cracks in the spacer

        1. Repair, VRS3648 TASK 72-42-35-300-007 (REPAIR-007)

    2. SUBTASK 72-42-35-220-051 Examine the No. 4 Bearing Front Cooling Duct (01-010) for Nicks and Dents

      1. Examine the duct for nicks and dents.

        1. Nicks or dents.

          1. Up to 10 percent of the material thickness, 1.0 sqin (645.16 sqmm) areas that are not continuous. There must be no high metal

          1. Accept

          2. Other than (a)

          1. Repair, VRS3301 TASK 72-42-35-300-002 (REPAIR-002)

    3. SUBTASK 72-42-35-220-052 Examine the No. 4 Bearing Front Cooling Duct (01-010) for Damage on the Spacer Threads

    1. Refer to: Figure

      2. Examine the duct at location 1, for damage on the spacer threads.

        1. Damage, minor material pick-up

        1. Repair, VRS3302 TASK 72-42-35-300-003 (REPAIR-003)

        2. Damage more than (1) or severe thread wear

        1. Repair, VRS3648 TASK 72-42-35-300-007 (REPAIR-007)

    4. SUBTASK 72-42-35-220-055 Examine the No. 4 Bearing Cooling Duct (01-010) for Wear and Galling on the Cooling Air Bosses

    1. Refer to: Figure

      2. Examine the duct at location 2 for wear and galling on the cooling air bosses.

        1. The wear and galling is a 360 degrees by 0.060in. (1.524 mm) band. The band is maintained at a maximum diameter of 0.702in. (17.831 mm) and is in 0.300in. (7.62 mm) of Surface C. There is no high metal and the air tubes can move freely in the bosses

        1. Accept

        2. Other than (1)

        1. Repair, VRS3301 TASK 72-42-35-300-002 (REPAIR-002)

    5. SUBTASK 72-42-35-220-053 Examine the No. 4 Bearing Front Cooling Duct (01-010) for the Rear and Front Flange Outside Diameters

      NOTE

      The diameters can be measured in a free or a held condition. All dimensions apply when Surface K is flat by 0.002 in. (0.05 mm), Diameter L maintains a clearance envelope of 12.759 in. (324.08 mm) diameter, and Diameter M maintains a clearance envelope of 6.059 in. (153.90 mm) diameter in a free or held condition. Hold the duct only on Surfaces K and H and Diameters L and M.

    1. Refer to Figure.

      2. Examine the No. 4 bearing front cooling duct at location 2055.

        1. Diameter.

          NOTE

          It is not necessary to measure the two conditions (free condition and held condition).

          1. If the dimension is between 12.739 and 12.773 in. (323.57 and 324.43 mm) in a free condition or 12.754 and 12.758 in. (323.95 and 324.05 mm) in a held condition. A minimum of eight measurements is necessary for the free condition. The average of the measurements must be in the held condition limits for free or held conditions

          1. Accept

          2. Other than (a)

          1. Repair, VRS3303 TASK 72-42-35-300-004 (REPAIR-004)**

      3. Examine the No. 4 bearing front cooling duct at location 2052.

        1. Diameter.

          NOTE

          It is not necessary to measure the two conditions (free condition and held condition).

          1. If the dimension is between 6.048 and 6.062 in. (153.62 and 153.98 mm) in a free condition or 6.053 and 6.057 in. (153.75 and 153.85 mm) in a held condition. A minimum of eight measurements is necessary for the free condition. The average of the measurements must be in the held condition limits for free or held conditions

          1. Accept

          2. Other than (a)

          1. Repair, VRS3304 TASK 72-42-35-300-005 (REPAIR-005)**

    6. SUBTASK 72-42-35-220-054 Examine the No. 4 Bearing Front Cooling Duct (01-010) for the Front Inside Diameter

    1. Refer to: Figure

      2. Examine the duct diameter at location 2053.

        1. If the diameter is between 5.965 in. and 5.975 in. (151.511 mm and 151.765 mm)

        1. Accept

        2. Write down the dimension of the diameter.

        2. Other than (1)

        1. Reject

    7. SUBTASK 72-42-35-220-061 Examine the No. 4 Bearing Front Cooling Duct (01-010) Oil Drain Hole

    1. Refer to Figure.

      2. Examine the oil drain hole, diameter C.

        1. If diameter C is between 0.115 in. and 0.135 in. (2.92 mm to 3.43 mm)

        1. Accept

        2. Other than (1)

        1. Reject

    8. SUBTASK 72-42-35-380-001 Apply Antigalling Compound on the Spacer Threads

      CAUTION

      YOU MUST DO THIS SUBTASK AFTER YOU COMPLETE ALL THE INSPECTIONS AND APPLICABLE REPAIRS AND BEFORE YOU INSTALL THE PART INTO THE ENGINE.

    1. Refer to Figure.

      2. Apply antigalling compound on the spacer threads

    9. Figure: No. 4 Bearing Cooling Duct Inspection Locations

    Sheet 1

    Legend
    No. 4 Bearing Cooling Duct Inspection Locations

    Sheet 1

    Close

    Figure: No. 4 Bearing Cooling Duct Inspection Locations

    Sheet 2

    Legend
    No. 4 Bearing Cooling Duct Inspection Locations

    Sheet 2

    Close

    Figure: No. 4 Bearing Cooling Duct Inspection Locations

    Sheet 3

    Legend
    No. 4 Bearing Cooling Duct Inspection Locations

    Sheet 3

    Close

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:8F024
Enterprise Name:EVERLUBE PRODUCTS
BU Name:EVERLUBE PRODUCTS
Street:100 COOPER CIRCLE
City:PEACHTREE CITY
Zip Code:GA 30269-3025
Country:USA
Phone Number:1-770-261-4819, 1-800-428-7802
Fax Number:1-770-261-4805
Internet:www.everlubeproducts.com
Manufacturer Code:8F024
Supply Number:CoMat 10-130
Type:sp01
Supply Short Name:CoMat 10-130 ANTIGALLING COMPOUND
Supply Name:CoMat 10-130 ANTIGALLING COMPOUND
Specification Groups:
Doc NumberType
PWA 36545EVERLUBE ESNALUBE 382
Suppliers:
ManufacturerRemarks
8F024