DMC:V2500-A0-72-32-8330-03A-920A-C|Issue No:005|Issue Date:2021-02-01

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 72-32-83-300-055 LPC Front Case - Replace The Abradable Seal, Repair-055 (VRS1935)

Effectivity

FIG/ITEM	PART NO.
02-350	5A1864

Material of component

PART IDENT	IAE SYMBOL	MATERIAL
LP compressor front case		Aluminium alloy

General

Price and availability - none

NOTE

To identify the consumable materials refer to the PCI.

NOTE

Special tools are identified in the procedure by the tool primary number.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

Name	Manufacturer	Part Number / Identification	Quantity	Remark
Non-Metallic Scraper	LOCAL	Non-Metallic Scraper
Dry blast cabinet	LOCAL	Dry blast cabinet
Oven	LOCAL	Oven
Knife	LOCAL	Knife		Cutter
Hardness tester (Durometer)	LOCAL	Hardness tester (Durometer)
Injector	LOCAL	Injector		(air pressure type)
Water blast jet	LOCAL	Water blast jet
IAE 3J12804 Molding fixture	0AM53	IAE 3J12804	1
IAE 3J12775 Bond test fixture	0AM53	IAE 3J12775	1
IAE 3J12785 Inspection stand	0AM53	IAE 3J12785	1
IAE 3J12792 Inspection stand	0AM53	IAE 3J12792	1

Consumables, Materials and Expendables

Name	Manufacturer	Part Number / Identification
CoMat 01-031 ACETONE (CH3)2CO	LOCAL	CoMat 01-031
CoMat 01-124 ISOPROPYL ALCOHOL	LOCAL	CoMat 01-124
CoMat 01-275 CHROMATE CONVERSION COATING FOR ALUMINIUM	00BB6	CoMat 01-275
CoMat 02-005 ADHESIVE TAPE (MASKING)	LOCAL	CoMat 02-005
CoMat 02-099 LINT-FREE CLOTH	X222X	CoMat 02-099
CoMat 05-038 SILICON CARBIDE ABRASIVE	1E1X8	CoMat 05-038
CoMat 05-050 SILICON CARBIDE GRIT	1E1X8	CoMat 05-050
CoMat 06-064 FLUORESCENT PENETRANT (WATER WASHABLE MEDIUM SENSITIVITY)	X222X	CoMat 06-064
CoMat 08-032 PRIMER	B1571	CoMat 08-032
CoMat 08-150 SILICONE RUBBER COMPOUND	LOCAL	CoMat 08-150

Spares

NONE

Safety Requirements

NONE

Procedure

1. Refer to Figure.
2. NOTE
  This Step is an alternative to Step.
  NOTE
  Take care not to damage the LP compressor front case.
  Remove the damaged abradable seal.
3. Use a non-metallic scraper or similar.
1. Refer to Figure and Figure.
2. 1. Use water blast jet. Refer to the SPM TASK 70-15-01-160-501. Make a test piece of AMS4132.
3. 1. Use IAEJ12792 inspection stand 1 off if necessary
1. Refer to Figure.
2. Fluorescent penetrant examine the surface where silicone rubber compound is removed.
3. 1. Use CoMat 06-064 FLUORESCENT PENETRANT (WATER WASHABLE MEDIUM SENSITIVITY).
1. Refer to Figure.
2. NOTE
  This Step must be done if the abradable seal is removed by Step. It is not necessary to do this Step if Step was done.
  Apply the chromat conversion coating for aluminium with a brush to the surface where silicon rubber compound is removed.
3. 1. Use CoMat 01-275 CHROMATE CONVERSION COATING FOR ALUMINIUM.
4. Use clean cold water and then dry air blast to dry the repaired area
1. Refer to Figure.
2. Mask the areas which are not to be applied with silicon rubber compound.
3. Use CoMat 02-005 ADHESIVE TAPE (MASKING).
4. Dry abrasive blast the molding area.
5. Use CoMat 05-038 SILICON CARBIDE ABRASIVE or CoMat 05-050 SILICON CARBIDE GRIT. Use a dry blast system cabinet with air pressure of 76.9 to 87.0 psi (530.21 to 599.84 kPa) at a minimum distance of 6 in. (152.4 mm) from the air nozzle to the component surface.
6. Remove the abrasive grit that remains by vacuuming.
7. Wipe the blasted surfaces.
8. Use CoMat 02-099 LINT-FREE CLOTH made moist with CoMat 01-031 ACETONE (CH3)2CO or CoMat 01-124 ISOPROPYL ALCOHOL.
9. Air dry for 15 minutes minimum.
1. NOTE
  The primed surface must have a pale pink color. If there is no color, the primer layer is not continuous. If the color is bright, streaky bright or chalky, the primer is to thick.
  Keep the primer in a small container for single use only. Do not use the primer that remains.
  Within eight hours after cleaning , prime the surface of the molding with a clean cloth and then immediately wipe off any excess primer with another clean cloth.
2. 1. Use CoMat 08-032 PRIMER. Refer to SPM TASK 70-36-06-360-501.
3. Cure the primed surface. Refer to SPM TASK 70-36-06-360-501.
1. NOTE
  The silicon rubber compound should be used within 12 months from data of manufacture when stored in its original, unopened container at temperatures below 90 deg F (32 deg C).
  Clean the molding fixture.
2. Use IAE 3J12804 Molding fixture 1 off.
3. Attach the component to the molding fixture.
4. Put the gas free silicon rubber component into an injector.
5. Use an injector (air pressure type).
6. Use CoMat 08-150 SILICONE RUBBER COMPOUND.
7. Inject the silicon rubber compound with the molding fixture attached into the component until the compound comes out of the vent port of the fixture.
8. Injection pressure is 35.5 to 56.8 psi (245 to 392 kPa).
9. Remove the injector.
1. Put the LP compressor front case assembly into an oven.
2. Cure the compound.
3. Cure for two hours at 291 to 309 deg F (144 to 154 deg C).
4. Remove the component from the molding fixture.
1. Refer to Figure, Figure, Figure and Figure.
2. Visualy examine the repaired area.
3. 1. Foreign inclusion is not permitted.
  2. Peelings are not permitted.
  3. Bubbles are not permitted.
4. Do a dimensional check of the molding diameter of the abradable seal. If necessary, grind the diameter of the abradable seal.
5. Do a dimensional check of the excess abradable seal (Dim.H.). If necessary, remove the excess resin by using grinding equipment, cutter / knife and / or equivalent.
6. If the Dim.H. height between the front liner surface of the LPC front case and the inner surface of the abradable seal is more than 0.019 in. (0.50 mm), blend abradable seal.
7. Do a hardness check of the repaired area for equal spaced position on the circumference.
8. Use a hardness tester (durometer).
9. Hardness must be ASTM D2240 (durometer A) 70 - 80.
1. Refer to Figure.
2. NOTE
  The bond test must be done after curing of the rubber compound.
  Do a bond test of the repaired area.
3. 1. No signs of bulging or air leakage are permitted.
  2. Use for inspection air or nitrogen gas.
  3. Gas pressure must be 200 psi (1380 kPa).
  4. Change the inspection position as necessary to examine the not fully repaired areas.
  5. The probe angle is approximately 45 degrees.

Sheet 1

Sheet 2

Sheet 3

Sheet 4

Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE

Manufacturer Code:	00BB6
Enterprise Name:	INDESTRUCTIBLE PAINT INC
BU Name:	INDESTRUCTIBLE PAINT INC
Street:	1 INDEPENDENCE DRIVE
City:	MONROE
State:	CT
Zip Code:	06468
Country:	USA
Phone Number:	1-203-880-9130
Fax Number:	1-203-880-9133
Email:	dave@indestructiblepaint.com
Internet:	www.indestructiblepaint.com

Manufacturer Code:	0AM53
Enterprise Name:	IAE INTERNATIONAL AERO ENGINES AG
BU Name:	NULL
Building:	SUITE 400
Street:	628 HEBRON AVENUE
City:	GLASTONBURY
State:	CT
Zip Code:	06033
Country:	USA

Manufacturer Code:	1E1X8
Enterprise Name:	SAINT-GOBAIN CERAMICS AND PLASTICS, INC
BU Name:	SAINT-GOBAIN CERAMICS AND PLASTICS, INC
Street:	1 NEW BOND ST
City:	WORCESTER
State:	MA
Zip Code:	01606
Country:	UNITED STATES OF AMERICA
Phone Number:	1-508-795-5000, 1-800-243-0028
Fax Number:	1-508-795-2380
Internet:	www.saint-gobain-northamerica.com

Manufacturer Code:	B1571
Enterprise Name:	DOW SILICONES BELGIUM SRL
BU Name:	DOW SILICONES BELGIUM SRL
Street:	RUE JULES BORDET
City:	7180 SENEFFE
Country:	BELGIUM

Manufacturer Code:	LOCAL
Enterprise Name:	LOCALLY SUPPLIED

Manufacturer Code:	LOCAL
Tool Number:	Dry blast cabinet
Tool Name:	Dry blast cabinet

Manufacturer Code:	X222X
Enterprise Name:	N/A – REFER TO APPLICABLE COMAT SUFFIX

TASK 72-32-83-300-055 LPC Front Case - Replace The Abradable Seal, Repair-055 (VRS1935)

Export Control

Copyright

Applicability

Common Information

TASK 72-32-83-300-055 LPC Front Case - Replace The Abradable Seal, Repair-055 (VRS1935)

Effectivity

Material of component

General

NOTE

NOTE

Preliminary Requirements

Pre-Conditions

Support Equipment

Consumables, Materials and Expendables

Spares

Safety Requirements

Procedure

SUBTASK 72-32-83-360-132-001 Remove the Damaged Abradable Seal

NOTE

NOTE

SUBTASK 72-32-83-360-132-002 Remove the Damaged Abradable seal

NOTE

SUBTASK 72-32-83-220-242 Examine the Surface from which Silicon Rubber Compound are to be removed

SUBTASK 72-32-83-380-135 Apply Surface Protection to the LPC Case Assembly

NOTE

SUBTASK 72-32-83-120-077 Clean the Surface which are to be applied with Silicon Rubber Compound

NOTE

SUBTASK 72-32-83-360-136 Apply Primer to the Surfaces after Cleaning

NOTE

SUBTASK 72-32-83-360-137 Mold the Silicon Rubber Compound

NOTE

SUBTASK 72-32-83-360-138 Cure the Silicon Rubber Compound

SUBTASK 72-32-83-220-230 Examine the Repaired Area

SUBTASK 72-32-83-220-231 Do a bond Test of the Repaired Area

NOTE

Figure: Repair Details and Dimensions

Sheet 1

Figure: Repair Details and Dimensions

Sheet 2

Figure: Repair Details and Dimensions

Sheet 3

Figure: Repair Details and Dimensions

Sheet 4

Figure: Repair Details and Dimensions

Repair Details and Dimensions

Figure: Repair Details and Dimensions

Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions