TASK 72-41-31-200-003-B00 HPC Stage 4 Rotor Path Segment - Examine, Inspection-003

DMC:V2500-A0-72-41-3114-00B-300A-C|Issue No:002.00|Issue Date:2020-02-01

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 72-41-31-200-003-B00 HPC Stage 4 Rotor Path Segment - Examine, Inspection-003

Effectivity

FIG/ITEM

PART NO.

01-690

6A4348

01-690

6A7470

General

This TASK gives the procedure for the inspection of the stage 4 rotor path ring segments. For the other parts of the HP compressor front cases, refer to TASK 72-41-31-200-000 (INSPECTION-000).

Fig/item numbers in parentheses in the procedure agree with those used in the IPC. Only the primary Fig/Item numbers are used. For the service bulletin alpha variants refer to the IPC.

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.

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.

The procedure for the parts which must have a crack test is given in SUBTASK 72-41-31-230-080. Do the crack 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 the 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 can be shown to be necessary at a subsequent 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/SUBTASK numbers are in the SPM.

The segments must be kept as a full set and examined as a full set. If one segment is rejected then the set must be rejected. Repair segments as necessary. Replacement set of segments to be final machined on re-assembly.

References

Refer to the SPM for data on these items:

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

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

Inspection of Parts, SPM 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:

Methods of Testing for Crack Indications,

Chemical Processes,

Surface Protection.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-31-230-124 Examine the Stage 4 Rotor Path Ring Segments for Cracks

    1. Clean the parts. Refer to TASK 72-41-31-100-000 (CLEANING-000).

      2. Do the test for cracks on the parts that are given below.

        PART IDENT

        TASK/SUBTASK

        TASK SPM

        Stage 4 rotor path ring segments

        TASK 70-23-02-230-501

        1. Cracked

        1. Reject

    2. SUBTASK 72-41-31-220-163 Examine the Stage 4 Rotor Path Ring Segments Lining at Location 1

      NOTE

      Accept or reject as set. Rejected set must be re-lined before use in a new set.

    1. Refer to Figure.

      2. Rotor path ring lining radius. Use the data written as a note in TASK 72-41-00-040-001-B00 (DISASSEMBLY, CONFIG-002).

        1. If the radius is between 10.550 and 10.556 in. (267.97 and 268.12 mm)

        1. Accept

        2. More than 10.556 in. (268.12 mm)

        1. Repair VRS6243, TASK 72-41-31-300-006 (REPAIR-006)

      3. Gouged

      1. Repair VRS6243, TASK 72-41-31-300-006 (REPAIR-006)

      4. Chipped.

        1. Not more than 0.100 in. (2.54 mm) in length and 0.050 in. (1.27 mm) in width at the split line, if there is no loss of adhesion to the backing material

        1. Accept

        2. More than in (1)

        1. Repair VRS6243, TASK 72-41-31-300-006 (REPAIR-006)

      5. Scored.

        1. Not more than 0.010 in. (0.25 mm) in depth

        1. Accept

        2. More than in (1)

        1. Repair VRS6243, TASK 72-41-31-300-006 (REPAIR-006)

    3. SUBTASK 72-41-31-220-164 Examine the Stage 4 Rotor Path Ring Segments Lands at Location 1221

    1. Refer to Figure.

      2. Scored or scratched.

        1. Up to 0.002 in. (0.05 mm) in depth.

        1. Accept.

        2. More than in (1).

        1. Repair, VRS6208 TASK 72-41-31-300-007 (REPAIR-007).

      3. Worn.

        1. If the thickness of the land is between 0.114 to 0.117 in. (2.90 to 2.98 mm).

        1. Accept.

        2. Less than 0.114 in. (2.90 mm).

        1. Reject.

    4. SUBTASK 72-41-31-220-165 Examine the Stage 4 Rotor Path Ring Segments Faces at Locations 2 and 3

    1. Refer to Figure.

      2. Scored or scratched.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in (1).

        1. Reject.

    5. SUBTASK 72-41-31-220-203 Examine the Stage 4 Rotor Path Ring Segments Stop Face at Location 4

    1. Refer to Figure.

      2. Worn.

        1. Up to 0.010in. (0.25 mm) in depth

        1. Accept

        2. Between 0.010 to 0.020in. (0.25 to 0.50 mm) in depth

        1. Mark the component with the symbol 'A' in a triangle next to the part number using vibro-engraving equipment, Figure. Refer to the SPM TASK 70-09-00-400-501, SUBTASK 70-09-00-400-001.

      3. Chafed.

        1. Up to 0.010in. (0.25 mm) in depth

        1. Accept

        2. More than in (1)

        1. Repair, VRS6208 TASK 72-41-31-300-007 (REPAIR-007)

    6. SUBTASK 72-41-31-220-166 Examine the Stage 4 Rotor Path Ring Segments all Remaining Surfaces

      1. Nicked, dented, scratched or burred.

        1. Up to 0.005in. (0.13 mm) in depth

        1. Accept

        2. More than in (1)

        1. Reject

    7. Figure: Stage 4 rotor path ring - Inspection locations

    Stage 4 rotor path ring - Inspection locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised inspection criteria. (18VG258)