TASK 72-00-31-200-004 LPC Fan Disk - Examine (Level 2 Inspection Limits), Inspection-004

DMC:V2500-A0-72-00-3105-00A-300A-C|Issue No:002.00|Issue Date:2015-08-01

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 72-00-31-200-004 LPC Fan Disk - Examine (Level 2 Inspection Limits), Inspection-004

Effectivity

General

This TASK gives the procedure for the inspection of the Stage 1 Fan Disc Assembly below major soft time and scheduled for a level 2 inspection, as given in the Maintenance Management Program.

Where applicable, these inspections are to be done in conjunction with those given in the interface inspections (refer to TASK 72-00-00-200-000).

The module will be sufficiently disassembled (TASK 72-31-00-030-001) for the components to be examined as specified in accordance with this procedure.

The policy necessary for the inspection is given in SPM TASK 70-20-00-200-501.

NOTE

The word "Reject" is used after an interface/SP50 inspection statement to show that a higher-level inspection and possible repair to the damaged part is necessary if the part is rejected, refer to the respective inspection/check. Do the higher-level inspection procedure as found in the applicable Chapter/Section/Subject of this manual the damaged part(s).

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-00-31-220-122 Examine the Stage 1 Fan Disc Assembly for Cracks

    1. Refer to Figure.

    2. Clean the parts. Refer to TASK 72-31-12-100-000 (CLEANING-000).

      3. Do the test for cracks on the part that is given below. Use the applicable penetrant inspection procedure.

        PART IDENT

        TASK/SUBTASK

        Stage 1 fan disc assembly

        1. Special care must be given to examine the following areas during the Fluorescent Penetrant Inspection.

        1. Front flange.

        2. Inner diameter.

        3. Front face.

        4. Rear face.

        5. Rear flange.

        6. Curvic coupling area.

        7. NOTE

          If the Fan Disc is not fully disassembled (assembled with the rear retaining ring), a crack test on the Fan Disc is not necessary.

          Zone A (two positions each dovetail slot).

          8. Cracked

          1. Reject

    2. SUBTASK 72-00-31-220-123 Examine the Stage 1 Fan Disc Assembly Dovetail Sides

    1. Refer to Figure.

      2. Examine the dovetail sides at location 1.

        1. Galled.

          1. Not more than 0.003 in. (0.08 mm) in depth

          1. Accept

          2. More than in Step

          1. Reject

        2. Scored

        1. Repair, VRS1152 TASK 72-31-12-300-001 (REPAIR-001)

        3. Missing dry film lubricant

        1. Repair, VRS1134 TASK 72-00-31-300-008 (REPAIR-008)

    3. SUBTASK 72-00-31-220-124 Examine the Stage 1 Fan Disc Assembly Curvic Teeth

    1. Refer to Figure.

      2. Examine the curvic teeth at location 2.

        1. Galled

        1. Repair, VRS1155 TASK 72-31-12-300-005 (REPAIR-005)

        2. Dented

        1. Repair, VRS1155 TASK 72-31-12-300-005 (REPAIR-005)

        3. Corrosion pitting.

          1. General corrosion pitting of tooth crest flats, root flats, root fillets and curvic side faces excluding working flanks not more than 0.005 in. (0.12 mm) in depth

          1. Accept

          2. More than 0.005 in. (0.12 mm) in depth

          1. Reject

          3. Isolated pits not more than 0.008 in. (0.20 mm) deep on tooth crest flats

          1. Accept

          4. More than 0.008 in. (0.20 mm) in depth

          1. Reject

          5. Light staining only, working flanks

          1. Accept

          6. More than in Step

          1. Reject

    4. SUBTASK 72-00-31-220-125 Examine the Stage 1 Fan Disc Assembly Shank Nuts

    1. Refer to: Figure.

      2. Examine the shank nuts at location 3.

        1. Loose

        1. Repair, VRS1157 TASK 72-31-12-300-007 (REPAIR-007)

        2. Damaged

        1. Repair, VRS1157 TASK 72-31-12-300-007 (REPAIR-007)

      3. Do the torque check for reuse of the shank nuts. Refer to the SPM TASK 70-42-01-400-501.

        1. If the locking torque is between 6.5 and 60 lbf.in (0.74 and 6.78 Nm)

        1. Accept

        2. Other than in Step

        1. Repair, VRS1157 TASK 72-31-12-300-007 (REPAIR-007)

    5. SUBTASK 72-00-31-220-126 Examine the Stage 1 Fan Disc Assembly Washer Plate

    1. Refer to Figure.

      2. Examine the washer plates at location 4.

        1. Peeled

        1. Repair, VRS1159 TASK 72-31-12-300-008 (REPAIR-008)

    6. SUBTASK 72-00-31-220-127 Examine the Stage 1 Fan Disc Assembly Rear Ramp

    1. Refer to: Figure.

      2. Examine the rear ramp at location 5.

        1. Peeled

        1. Repair, VRS1164 TASK 72-31-12-300-009 (REPAIR-009)

    7. Figure: Fan Disc Inspection Locations

    Fan Disc Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Added part number. Revised typographical errors. (09VJ815A)