TASK 72-41-11-300-004 HPC Stage 3 - 8 Drum Disk - Blend Repair On The Seal Fins, Repair-004 (VRS6048)

DMC:V2500-A0-72-41-1101-02A-649A-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

6A3508 6A3648 6A3934 6A3936 6A4189 6A4900 6A5467 6A55926A5594 6A5659 6A6473 6A7379 6A7380 6A7382 6A7383 6A7384 6A7385 6A74016A7705 6A8236 6A8316 6A8318 6A8350

Common Information

TASK 72-41-11-300-004 HPC Stage 3 - 8 Drum Disk - Blend Repair On The Seal Fins, Repair-004 (VRS6048)

Effectivity

FIG/ITEM

PART NO.

01-200

6A3508

01-200

6A3648

01-200

6A3934

01-200

6A3936

01-200

6A4189

01-200

6A4900

01-200

6A5467

01-200

6A5592

01-200

6A5594

01-200

6A5659

01-200

6A6473

01-200

6A7379

01-200

6A7380

01-200

6A7382

01-200

6A7383

01-200

6A7384

01-200

6A7385

01-200

6A7401

01-200

6A7705

01-200

6A8236

01-200

6A8316

01-200

6A8318

01-200

6A8350

01-200

6B1379

01-200

6B1380

01-200

6B1381

01-200

6B1382

01-200

6B1383

01-200

6B1384

01-200

6B1385

01-200

6B1386

01-200

6B1387

01-200

6B1391

01-200

6B1392

01-200

6B1393

01-200

6B1401

01-200

6B1402

01-200

6B1403

01-200

6B1404

01-200

6B1405

01-200

6B1406

General Data

This repair must only be done when the instruction to do so is given in 72-41-11 Inspection/Check.

The practices and processes referred to in the procedure by the TASK/SUBTASK number are in the Standard Practices and Processes Manual (SPM).

NOTE

It is possible that some materials in the Consumable Materials chart cannot be used for some or all of the necessary applications. Before you use the materials, make sure the types, quantities and applications of the materials necessary are legally permitted in your location. All persons must obey all applicable federal, state, local and provincial laws and regulations when it is necessary to work with these materials.
To identify the consumable materials, refer to the Overhaul Processes and Consumables Index (PCI).
Other necessary consumable materials are referred to in the SPM TASKs.

Preliminary Requirements

Pre-Conditions

Action/ConditionData Module/Technical Publication
Make sure that all the necessary cleaning and inspection procedures are done before this repair.

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-11-325-061 Remove Material from the Damaged Seal Fin

    1. Refer to Figure and Figure.

      2. Remove material from the damaged seal fin (refer to the limits given in Step).

      1. Remove sufficient material to remove the damage.

      2. Do not remove material from the seal fin land.

      3. Limits.

        1. For fins Locations 1001, 1002, 1003, and 1004:

          1. Areas of fin on the multi-fin seals can be removed up to a maximum limit of 30 degrees of any one fin. The maximum number of fins from which this quantity of material can be removed is as follows:

          1. A seal with three fins can have one fin repaired.

          2. A seal with four fins can have two fins repaired.

        2. For fins Location 1004 only (below limits are applicable for the PNs 6A8316, 6B1386 and 6B1404 only):

        1. If any one of the three seal fins is accepted by Step 11.E (4) (d) of inspection TASK 72-41-11-200-001-B00, SUBTASK 72-41-11-220-083 but has an irregular profile, blend and polish to remove high spots and burrs only to a maximum of 360 degrees. See Figure.

        2. If the material shows a change in color, to darker than a light straw color, the component is to be rejected.

      3. Material can be removed from the other fins where necessary when the side AC x AD removed from each fin is not more than 0.025 sqin. (0.16 sqcm).

      4. Removal of material can be extended across all the fins on a multi-fin seal when the side area AC x AD removed from each fin is not more than 0.025 sqin. (0.16 sqcm).

      5. Material must be removed smoothly to keep the seal contour near to the initial shape.

      6. Deburr, blend and polish the area of repair.

      7. Refer to the SPM TASK 70-35-03-300-501.

    2. SUBTASK 72-41-11-110-092 Do a Swab Etch

      1. Chemically clean.

      1. Refer to the SPM TASK 70-11-08-300-503, SUBTASK 70-11-08-300-001.

      2. Swab etch the repair area.

      1. Refer to the SPM TASK 70-11-08-300-503, SUBTASK 70-11-08-300-002.

    3. SUBTASK 72-41-11-220-238 Binocular Examine

      1. Binocular examine the repair area.

      1. Use 3 - 10X binoculars.

      2. Indications of surface defects are not permitted.

      3. Make sure that there is no raised metal remaining.

    4. SUBTASK 72-41-11-230-097 Do a Crack Test

      1. Do a penetrant crack test of the repair area by one of the methods that follow:

        1. Refer to the SPM TASK 70-23-05-230-501.

        1. Use ultra high sensitivity.

        2. No cracks are permitted.

        2. Refer to the SPM TASK 70-23-04-230-501.

        1. No cracks are permitted.

    5. SUBTASK 72-41-11-110-093 Chemically Clean

      1. Chemically clean the repair area to remove fluorescent penetrant.

      1. Refer to the SPM TASK 70-11-03-300-503.

    6. SUBTASK 72-41-11-220-073 Examine the Seal Fin

    1. Refer to Figure and Figure.

      2. Do a dimensional inspection.

      1. Make sure the surface finish is the same as the adjacent material.

    7. SUBTASK 72-41-11-350-056 Identify the Repair

    1. Refer to Figure.

      NOTE

      If the parts are already identified with VRS6048 from a repair that was done before, more identification is not necessary.

      2. Vibration peen VRS6048 adjacent to the part number.

      1. Refer to the SPM TASK 70-09-00-400-501, SUBTASK 70-09-00-400-001.

    8. Figure: Repair Detail and Dimensions

    Repair Detail and Dimensions

    Figure: Repair Detail and Dimensions

    Repair Detail and Dimensions

    Figure: HPC Stage 3 - 8 Drum Disk - Blend Repair On The Seal Fins (For PNs 6A8316, 6B1386 and 6B1404 Only)

    HPC Stage 3 - 8 Drum Disk - Blend Repair On The Seal Fins (For PNs 6A8316, 6B1386 and 6B1404 Only)

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised blend procedure and added figure. (18VG286)