TASK 72-32-71-300-025 LPC Bleed Valve Upper Power Arm - Repair The Damaged Pin Hole By Chromium Plate, Repair-025 (VRS1719)

DMC:V2500-A5-72-32-7142-00A-647A-C|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

V2500-A5

Common Information

TASK 72-32-71-300-025 LPC Bleed Valve Upper Power Arm - Repair The Damaged Pin Hole By Chromium Plate, Repair-025 (VRS1719)

Effectivity

FIG/ITEM

PART NO.

02-300

5A0474

Material of component

PART IDENT

SYMBOL

MATERIAL

Upper power arm

Cast corrosion and heat resistant steel (17-4PH)

General

Price and availability - none

The practices and processes referred to in the procedure by the TASK numbers are in the SPM.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Standard workshop equipmentLOCALStandard workshop equipment
Chromium plate equipmentLOCALChromium plate equipment
Fluorescent Penetrant Inspection EquipmentLOCALFluorescent penetrant inspection equipment
OvenLOCALOven
Vibrating marking pencilLOCALVibrating marking pencil

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-32-71-320-054 Machine Worn Pin Hole

    1. Refer to Figure.

      2. NOTE

        If surface was repaired with chrome plate before, remove old plating fully.

        Machine the damaged diameter to 0.2544 to 0.2740 in. (6.460 to 6.960 mm) diameter.

      1. Machine only the minimum quantity of material to remove damage. Use standard workshop equipment.

    2. SUBTASK 72-32-71-230-085 Examine the Pin Hole of the Upper Power Arm for Cracks

      1. Do a penetrant crack test on the repaired area.

        1. Refer to TASK 72-32-71-200-004-B00 (INSPECTION-004, CONFIG-001).

        1. No cracks permitted.

    3. SUBTASK 72-32-71-330-055 Chromium Plate the Upper Power Arm, the Pin Hole

    1. Refer to Figure.

      2. NOTE

        Heat treatment is not necessary before chromium plating.

        Apply a mask, etch and wash the part.

      1. Refer to the SPM TASK 70-33-02-100-501.

      3. Put the part fully into a standard chromium plating solution for sufficient time to get the diameter 0.2444 in. (6.210 mm) maximum.

      1. Refer to the SPM TASK 70-33-02-100-501.

      4. Heat-treat after plating.

      1. Refer to the SPM TASK 70-33-02-100-501.

    4. SUBTASK 72-32-71-370-001 Bake the Upper Power Arm after Plating

      1. Bake the plated part in four hours or less after plating for eight hours minimum at a temperature of 351 to 401 deg F (177 to 205 deg C).

      1. Use an oven.

    5. SUBTASK 72-32-71-330-056 Examine the Upper Power Arm after Plating

    1. Refer to Figure.

      2. Visually examine the chromium deposit for pits, cracks that you can see and burns.

      1. Refer to TASK 72-32-71-200-004-B00 (INSPECTION-004, CONFIG-001).

    6. SUBTASK 72-32-71-324-001 Grind the Upper Power Arm after Plating

    1. Refer to Figure.

      2. Grind the plated area to the specified dimensions.

      1. Refer to the SPM TASK 70-32-00-320-501. Use standard workshop equipment.

    7. SUBTASK 72-32-71-220-153 Examine the Upper Power Arm after Grinding

    1. Refer to Figure.

      2. Visually examine the ground area for pits, cracks, burns and too much rough surface.

      1. Refer to TASK 72-32-71-200-004-B00 (INSPECTION-004, CONFIG-001).

    3. Dimensionally examine the area after grinding.

    8. SUBTASK 72-32-71-350-088 Identify the Repair

      1. Put mark VRS1719 adjacent to the part number.

      1. Refer to the SPM TASK 70-09-00-400-501. Use vibro-engraving equipment.

    9. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Link not Found
Manufacturer Code:LOCAL
Tool Number:Fluorescent penetrant inspection equipment
Tool Name:Fluorescent Penetrant Inspection Equipment
Manufacturer Code:LOCAL
Tool Number:Oven
Tool Name:Oven
Link not Found
Link not Found