TASK 72-50-21-200-003-B00 LPT Stage 4 Rear Heat Shield - Examine, Inspection-003

DMC:V2500-A0-72-50-2142-00B-300A-C|Issue No:003.00|Issue Date:2019-11-01

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 72-50-21-200-003-B00 LPT Stage 4 Rear Heat Shield - Examine, Inspection-003

Effectivity

FIG/ITEM

PART NO.

02-430

3A1956

02-450

3A1962

General

This TASK gives the procedure for the inspection of the stage 4 rear heatshield.

Fig/item numbers in parentheses in the procedure agree with those used in the IPC.

Deleted.

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 72-50-21-100-000.

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 72-50-21-230-067. Do the test before the part is visually examined.

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

Record and Control of the Lives of Parts, TASK 70-05-00-220-501

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
Dial caliperLOCALDial caliper

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-21-220-086 Visually Examine the Stage 4 Rear Heat Shield

      NOTE

      This is optional to SUBTASK 72-50-21-230-067-001 and SUBTASK 72-50-21-230-067-002.

      1. Examine the part for cracks.

      1. Refer to the SPM TASK 70-21-01-220-501.

        2. Cracked

          1. Cracks up to 0.300 in. (7.6 mm) in length, the minimum distance between the cracks 2.00 in. (50.8 mm) apart, use Dial caliper.

          1. Accept

          2. Cracks longer or closer than in Step

          1. Repair, VRS4099 TASK 72-50-21-300-029

    2. SUBTASK 72-50-21-230-067-001Examine the Stage 4 Rear Heat Shield for Cracks

    1. Clean the parts. Refer to TASK 72-50-21-100-000.

      2. Do the test for cracks on the part that are given below. Use the applicable penetrant procedure.

        PART IDENT

        TASK/SUBTASK

        Stage 4 Rear Heat Shield

        1. Cracked

          1. Cracks up to 0.300 in. (7.6 mm) in length, the minimum distance between the cracks 2.00 in. (50.8 mm) apart, use Dial caliper.

          1. Accept

          2. Cracks longer or closer than in Step

          1. Repair, VRS4099 TASK 72-50-21-300-029

    3. SUBTASK 72-50-21-230-067-002Examine the Stage 4 Rear Heat Shield for Cracks

    1. Clean the parts. Refer to TASK 72-50-21-100-000.

      2. Do the test for cracks on the part that are given below. Use the applicable penetrant procedure.

        PART IDENT

        TASK/SUBTASK

        Stage 4 Rear Heat Shield

        TASK 70-23-02-230-501

        1. Cracked

          1. Cracks up to 0.300 in. (7.6 mm) in length, the minimum distance between the cracks 2.00 in. (50.8 mm) apart, use Dial caliper.

          1. Accept

          2. Cracks longer or closer than in Step

          1. Repair, VRS4099 TASK 72-50-21-300-029

    4. SUBTASK 72-50-21-220-087 Examine the Surface of the Stage 4 Rear Heat Shield for Damage

      1. Examine the surface of the stage 4 rear heat shield for nicks.

        1. Any number, without break through or lifted material

        1. Accept

        2. Nicks with lifted material

        1. Repair, VRS4096 TASK 72-50-21-300-028

        3. Nicks with break through

        1. Repair, VRS4099 TASK 72-50-21-300-029

      2. Examine the surface of the stage 4 rear heat shield for dents.

        1. Any number, without break through or lifted material

        1. Accept

        2. Dents with lifted material

        1. Repair, VRS4096 TASK 72-50-21-300-028

        3. Dents with break through

        1. Repair, VRS4099 TASK 72-50-21-300-029

      3. Examine the surface of the stage 4 rear heat shield for buckling.

        1. Lightly buckled, but assembly is possible.

        1. Accept

        2. Heavily buckled, assembly is not possible.

        1. Reject

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Deleted General para. Revised dmRef. Added Note. Added procedural step. Revised SUBTASK title. Revised table content. Revised procedural step. (Editorial)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Dial caliper
Tool Name:Dial caliper