SERVICE BULLETIN REVISION NOTICE

ENGINE — SEAL, 13TH, 14TH, AND 15TH STAGE, HIGH PRESSURE COMPRESSOR (HPC)

— REPLACEMENT OF, AND INTRODUCTION OF A NEW SHOT PEEN SPECIFICATION, TO

IMPROVE REAR DRUM ROTOR DURABILITY

Turbojet Engine Service Bulletin No. PW4ENG 72-816 Revision No. 1 dated June 12, 2012.

Revision History

Original Issue December 2, 2011

Revision 1 dated June 12, 2012

Reason for the Revision

To correct a shotpeen area in Figure 8 and Figure 10 from “shotpeen including break edge” to

“no shotpeen including break edge”.

To correct a shotpeen dimension in Figure 9.

To add CIR information “Chapter/Section 72-35-08, Repair-04, -05, and -22” to the Added Data

statement that lists repairs affected by this Service Bulletin.

To add Notes in the Added Data.

Effect of Revision on Prior Compliance

None.

This is a Complete Revision (Not Applicable to the SGML version)

The contents are in accordance with the list of effective pages. All pages have the current revision

number. Technical changes are marked with black bars.

MODEL APPLICATION

PW4052, PW4052(-3), PW4056, PW4056(-3), PW4060, PW4060(-3), PW4062(-3), PW4062A(-3),

PW4152, PW4152(-3), PW4156A, PW4156A(-3), PW4158, PW4158(-3), PW4460, PW4460(-3),

PW4462, PW4462(-3)

BULLETIN ISSUE SEQUENCE

PW4000 Series 72-816

Page Revision No. Date

1 thru 70 1 June 12/12

A copy of this Revision Notice and any future revision notices must be filed as a permanent

record with your copy of the subject bulletin.

P&W Distribution Code

2616, 2618, 2619 PW4ENG 72-816

Page 1 of 1

Published in United States of America

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
SERVICE BULLETIN

ENGINE — SEAL, 13TH, 14TH, AND 15TH STAGE, HIGH PRESSURE COMPRESSOR (HPC)

— REPLACEMENT OF, AND INTRODUCTION OF A NEW SHOT PEEN SPECIFICATION,

TO IMPROVE REAR DRUM ROTOR DURABILITY

MODEL APPLICATION

PW4052, PW4052(-3), PW4056, PW4056(-3), PW4060, PW4060(-3), PW4062(-3),

PW4062A(-3), PW4152, PW4152(-3), PW4156A, PW4156A(-3), PW4158, PW4158(-3),

PW4460, PW4460(-3), PW4462, PW4462(-3)

BULLETIN ISSUE SEQUENCE

PW4000 Series 72-816

ATA NUMBER

72-35-00

UTC/P&W PROPRIETARY INFORMATION

This document is the property of United Technologies Corporation — Pratt & Whitney (UTC/P&W). You may not possess,

use, copy or disclose this document or any information in it, for any purpose, including without limitation to design,

manufacture, or repair parts, or obtain FAA or other government approval to do so, without UTC/P&W’s express written

permission. Neither receipt nor possession of this document alone, from any source, constitutes such permission.

Possession, use, copying or disclosure by anyone without UTC/P&W’s express written permission is not authorized

and may result in criminal and/or civil liability.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).

Compliance Category

6

P&W Distribution Code

2616, 2618, 2619

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 1 of 70

Published in United States of America
Summary

The purpose of this Service Bulletin is to replace the High Pressure Compressor (HPC) 13th, 14th

and 15th stage HPC seals and to introduce a new shot peen specification. Cracks are found in the

loading and locking slots of the HPC rear drum rotor assembly. The root cause of these cracks is

Thermal Mechanical Fatigue (TMF). The new seals and shot peen specification will reduce the

causes of TMF.

Planning Information

Effectivity Data

Engine Models Applicable

PW4052

Engine Serial Nos. P723701 thru P723706

PW4056

Engine Serial Nos. P724201 thru P724208

PW4056

Engine Serial Nos. P717501 thru P717700

PW4056

Engine Serial Nos. P724301 thru P724500

PW4056

Engine Serial Nos. P724502 thru P724504

PW4056

Engine Serial No. P724506

PW4056(-3)

Engine Serial Nos. P719991 thru P719996

PW4056

Engine Serial No. P724507

PW4060

Engine Serial Nos. P724101 thru P724200

PW4060

Engine Serial No. P724501

PW4060

Engine Serial No. P724505

PW4060

Engine Serial No. P724508

PW4060

Engine Serial No. P724509

PW4060, PW4060(-3), PW4062(-3)

Engine Serial Nos. P724601 thru P724751

PW4052(-3), PW4056, PW4056(-3), PW4060, PW4060(-3), PW4062(-3)

Engine Serial Nos. P727301 thru P728000

PW4052(-3), PW4056, PW4056(-3), PW4060, PW4060(-3), PW4062(-3), PW4062A(-3)

Engine Serial Nos. P729001 thru P729264*

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 2

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
PW4152

Engine Serial Nos. P717701 thru P717800

PW4152, PW4152(-3)

Engine Serial Nos. P724901 thru P724944*

PW4156A, PW4156A(-3)

Engine Serial Nos. P724551 thru P724578*

PW4158

Engine Serial Nos. P717201 thru P717205

PW4158

Engine Serial Nos. P724001 thru P724100

PW4158, PW4158(-3)

Engine Serial Nos. P724801 thru P724900

PW4158, PW4158(-3)

Engine Serial Nos. P728501 thru P728600

PW4158, PW4158(-3)

Engine Serial Nos. P729800 thru P729867*

PW4460

Engine Serial Nos. P723801 thru P723969

PW4462, PW4462(-3)

Engine Serial Nos. P733701 thru P733721

PW4460(-3), PW4462(-3)

Engine Serial Nos. P733726 thru P733856*

* This estimate of engine serial numbers will be revised, if necessary, when parts are

installed in engines at Pratt & Whitney.

NOTE: The engine serial number effectivity data and its related engine model

identification contained in this Service Bulletin are taken from the records of

part(s) incorporation during initial manufacture.

After initial engine manufacture, but before final delivery, P&W may change

part(s) in the engine or change the model identification of the engine. Such

action is recorded on FAA337 forms.

To find Service Bulletin PW4ENG 72-816 models that are applicable, the

owner/operator of the engine must compare the Service Bulletin List supplied

with the engine as sent from P&W and the List of Changes incorporated at the

Airframer from FAA337 forms to the Service Bulletin PW4ENG 72-816 Effectivity

section.

This Service Bulletin also applies to engines converted to Phase III (-3) configuration by

Service Bulletin No. PW4ENG 72-490, No. PW4ENG 72-504, or No. PW4ENG 72-572.

This Service Bulletin (SB) also applies to engines identified with a suffix as follows:

(-3A) configuration introduced by SB No. PW4ENG 72-588.

(-3A) configuration introduced by SB No. PW4ENG 73-150.

(-3B) configuration introduced by SB No. PW4ENG 72-512.

(-1C) configuration introduced by SB No. PW4ENG 72-499 or No. PW4ENG 72-520.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 3

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(-1E) configuration introduced by SB No. PW4ENG 72-521.

(-1C/-1E) configuration introduced by SB No. PW4ENG 72-516.

Concurrent Requirements

There are no concurrent requirements.

Reason

1. Problem: More than 200 HPC rear drum rotor assemblies from PW4000-94 and

PW4000-100 engine models were reported to have cracks in the blade loading and

locking slots.

2. Cause: The root cause is determined to be TMF. The TMF cracks are the result

of thermal gradients and related high stresses in the rear of the HPC section. The

high thermal gradients are attributed to seals that allow leakage of hot gases. High

stresses are attributed to shot peening. Shot peening adds a residual compressive

stress which protects against low cycle fatigue conditions, however shot peening can

be a detriment and initiate TMF.

3. Solution: Provide new 13th, 14th and 15th stage seals and introduce a new shot

peen procedure. The new seals reduce gas leakage and the associated thermal

gradient which contributes to TMF. The new shot peen procedure reduces the

compressive stress in the rear drum rotor assembly loading and locking slot areas.

These improvements will reduce the causes of TMF.

Description

Replace the 13th, 14th and 15th stage seals. Shot peen to the new specification.

Compliance

Category 6

Do when the subassembly (e.g. modules, accessories, components, build groups) is

disassembled sufficiently to give access to the changed part and to all changed spare parts.

Approval Data

The part number changes and/or part changes specified in the Material Information section

and Accomplishment Instructions of this Service Bulletin agree with the applicable Federal

Aviation Regulations and are FAA-Approved for the engine model(s) given.

Manpower

No more man-hours are necessary when done at complete disassembly/assembly.

Weight Data

No Change.

Electrical Load Data

Not Applicable.

Software Accomplishment Summary

Not Applicable.

References

1. Turbojet Engine Standard Practices Manual, Part No. 585005.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 4

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
2. PW4052, PW4052(-3), PW4056, PW4056(-3), PW4060, PW4060(-3), PW4060C,

PW4062(-3), PW4062A(-3) Turbofan Engines, Illustrated Parts Catalog, Part No. 50A607.

3. PW4152, PW4152(-3), PW4156A, PW4156A(-3), PW4158, PW4158(-3) Turbofan Engines,

Illustrated Parts Catalog, Part No. 50A445.

4. PW4460, PW4460(-3), PW4462, PW4462(-3) Turbofan Engines, Illustrated Parts Catalog,

Part No. 50A824.

5. PW4052, PW4052(-3), PW4056, PW4056(-3), PW4060, PW4060(-3), PW4060C,

PW4060C(-3), PW4062, PW4062A(-3) Turbofan Engines, Engine Manual, Part No.

50A605.

6. PW4152, PW4152(-3), PW4156A, PW4156A(-3), PW4158, PW4158(-3) Turbofan Engines,

Engine Manual, Part No. 50A443.

7. PW4460, PW4460(-3), PW4462, PW4462(-3) Turbofan Engines, Engine Manual, Part

No. 50A822.

8. PW4000 Series 94 Inch And 100 Inch Turbofan Engines, Engine Cleaning, Inspection And

Repair (CIR) Manual, Part No. 51A357.

9. Service Bulletin No. PW4ENG 72-490; Engine — Conversion Of A PW4460 Or PW4462

To A PW4460(-3) Or PW4462(-3). Issue Sequence 72-490, PW4000 Series.

10. Service Bulletin No. PW4ENG 72-499; Engine — Blade Set, First Stage LPC — Allow

Installation Of The FB2C First Stage LPC Blade Sets In Non-Phase 3 Engines To Create

The (-1C) Engine Configuration. Issue Sequence 72-499, PW4000 Series.

11. Service Bulletin No. PW4ENG 72-504; Engine — Conversion OF A PW4052, PW4056,

PW4060, To A PW4052(-3), PW4056(-3), Or PW4060(-3). Issue Sequence 72-504,

PW4000 Series.

12. Service Bulletin No. PW4ENG 72-512; Engine — Blade Set, First Stage LPC — Allow

Installation Of The FB2B First Stage LPC Blade Sets In Phase 3 Engines To Create The

(-3B) Engine Configuration. Issue Sequence 72-512, PW4000 Series.

13. Service Bulletin No. PW4ENG 72-516; Engine — Blade Set, First Stage LPC — Allow

Installation Of The FB2C First Stage LPC Blade Sets In Pre-Phase 3 Engines To Create

The (-1C/-1E) Engine Configuration. Issue Sequence 72-516, PW4000 Series.

14. Service Bulletin No. PW4ENG 72-520; Engine — Blade Set, First Stage LPC — Allow The

FB2C First Stage LPC Blade Sets In Non-Phase 3 Engines To Create The (-1C) Engine

Configuration (Installation Of Phase 3 Blades In Pre-Phase 3 Engine/Nacelle). Issue

Sequence 72-520, PW4000 Series.

15. Service Bulletin No. PW4ENG 72-521; Engine — Blade Set, First Stage LPC — Allow The

FB2C First Stage LPC Blade Sets In Non-Phase 3 Engines To Create The (-1E) Engine

Configuration (Installation Of Phase 3 Blades In Pre-Phase 3 Engine/ Phase 3 Nacelle).

Issue Sequence 72-521, PW4000 Series.

16. Service Bulletin No. PW4ENG 72-572; Engine — Conversion Of A PW4152, PW4156A,

PW4158 Engine To A PW4152(-3), PW4156A(-3), Or PW4158(-3) Engine. Issue Sequence

72-572, PW4000 Series.

17. Service Bulletin No. PW4ENG 72-588; Engine — Reidentification Of Engine Model Phase

(-3) To (-3A) For Installation In A Pre-Phase (-3) Nacelle. Issue Sequence 72-588,

PW4000 Series.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 5

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
18. Service Bulletin No. PW4ENG 73-150; Engine Fuel And Control — Plug, EEC

Programming — Installation Of To Create The (-3A) Engine Configuration. Issue Sequence

73-150, PW4000 Series.

19. Service Bulletin No. PW4ENG 72-565; Engine — Blades, 14th And 15th Stage High

Pressure Compressor (HPC) — Modification To Provide Improved Platform Clearance And

Blade Locking. Issue Sequence 72-565, PW4000 Series.

NOTE: Reference 19 is shown to help find configurations in relation to this bulletin.

NOTE: References 9 thru 18 are shown to help find non-production configurations that

may incorporate this bulletin.

Publications Changed

PW4052, PW4052(-3), PW4056, PW4056(-3), PW4060, PW4060(-3), PW4060C,

PW4062(-3), PW4062A(-3) Turbofan Engines, Illustrated Parts Catalog, Part No. 50A607.

72-35-00, Figures 7, 8 and 9

PW4152, PW4152(-3), PW4156A, PW4156A(-3), PW4158, PW4158(-3) Turbofan Engines,

Illustrated Parts Catalog, Part No. 50A445.

72-35-00, Figures 7, 8 and 9

PW4460, PW4460(-3), PW4462, PW4462(-3) Turbofan Engines, Illustrated Parts Catalog,

Part No. 50A824.

72-35-00, Figures 7, 8 and 9

PW4052, PW4052(-3), PW4056, PW4056(-3), PW4060, PW4060(-3), PW4060C,

PW4060C(-3), PW4062(-3) Turbofan Engines, Engine Manual, Part No. 50A605.

72-35-01

PW4152, PW4152(-3), PW4156A, PW4156A(-3), PW4158, PW4158(-3) Turbofan Engines,

Engine Manual, Part No. 50A443.

72-35-01

PW4460, PW4460(-3), PW4462, PW4462(-3) Turbofan Engines, Engine Manual, Part

No. 50A822.

72-35-01

PW4000 Series 94 Inch And 100 Inch Turbofan Engines, Engine Cleaning, Inspection And

Repair (CIR) Manual, Part No. 51A357.

72-35-00

72-35-10

Interchangeability

Old and new parts are interchangeable only in full sets by stage.

(When any stage of the HPC rear drum rotor assembly is debladed, use the new seal).

Information in the Appendix

Alternate Accomplishment Instructions (No)

Progression Charts (Yes)

Added Data (Yes)

Revision to Table of Limits (No)

Inspection Procedures (No)

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 6

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Material Information

Material — Cost and Availability

1. Part prices were not available at the time of Service Bulletin publication. Contact Pratt &

Whitney Spares Management & Logistics for firm quotations.

2. There is no kit provided to do this Service Bulletin.

3. Part availability information is provided in material data Instructions — Disposition.

Industry Support Program

Not Applicable.

The material data that follows is for each engine.

NOTE: It is possible to use the Chapter/Section and Figure/Item reference number

shown below the old part number to find the part in the Illustrated Parts Catalog.

Because there are many different configurations used, it is frequently necessary

to show more than one group of parts. When this occurs, parts that are

interchangeable are shown line-by-line only, unless this is shown differently.

CAUTION: THE FOLLOWING MATERIAL DATA TABLE(S) ARE ORGANIZED BY

ILLUSTRATED PARTS CATALOG. ALL PARTS IN THE TABLE(S) MAY OR

MAY NOT BE APPLICABLE TO ALL THE ENGINE MODELS SHOWN

IN THE TABLE HEADING. YOU MUST REFER TO THE APPROPRIATE

ILLUSTRATED PARTS CATALOG FOR ENGINE MODEL APPLICABILITY

USING THE OLD PART NUMBER (PN) AND CATALOG SEQUENCE

NUMBER. FAILURE TO INSTALL THE PART(S) IN THE CORRECT

ENGINE MODEL MAY RESULT IN A CONFIGURATION THAT IS NOT FAA

APPROVED.

The material data that follows is for each engine.

For PW4052, PW4056, PW4060, PW4060C Engines:

New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

50S158 2 * SEAL — HPC,

13STG

50H935

(72-35-00-7-1)

(2)(A)(C2)

50S159 2 * SEAL — HPC,

14STG

50H654

(72-35-00-8-1)

(2)(A)(N)

50S160 2 * SEAL — HPC,

15STG

50H665

(72-35-00-9-1)

(2)(A)(N)

The material data that follows is for each engine.

For PW4052, PW4056, PW4060 Engines Converted To Phase (-3) Configuration By Reference 11,

Service Bulletin No. PW4ENG 72-504:

New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

50S158 2 * SEAL, 13STG 50H935

(72-35-00-7-1 B)

(2)(A)(C2)

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 7

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

50S159 2 * SEAL, 14STG 50H654

(72-35-00-8-1)

(2)(A)(N)

50S160 2 * SEAL, 15STG 50H665

(72-35-00-9-1)

(2)(A)(N)

The material data that follows is for each engine.

For PW4052(-3), PW4056(-3), PW4060(-3), PW4062(-3), PW4062A(-3) Engines:

New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

50S158 2 * SEAL — HPC,

13STG

50H935

(72-35-00-7-1 B)

(2)(A)(C2)

6 SEAL — HPC,

14STG

55H587

(72-35-00-8-2)

(C2)

50S159 2 * SEAL — HPC,

14STG

(2)(A)

AR SEAL — HPC,

15STG

55H588

(72-35-00-9-5 A)

(C2)

AR SEAL — HPC,

15STG

54H335-001

(72-35-00-9-5AA)

(N)

50S160 2 * SEAL — HPC,

15STG

(2)(A)

The material data that follows is for each engine.

For PW4152, PW4156A, PW4158 Engines:

New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

50S158 2 * SEAL — HPC,

13STG

50H935

(72-35-00-7-1)

(2)(A)(C2)

50S159 2 * SEAL — HPC,

14STG

50H654

(72-35-00-8-1)

(2)(A)(N)

50S160 2 * SEAL — HPC,

15STG

50H665

(72-35-00-9-1)

(2)(A)(N)

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 8

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
The material data that follows is for each engine.

For PW4152, PW4156A, PW4158 Engines Converted To Phase(-3) Configuration By Reference 16,

Service Bulletin No. PW4ENG 72-572:

New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

50S158 2 * SEAL, 13STG 50H935

(72-35-00-7-1 B)

(2)(A)(C2)

50S159 2 * SEAL, 14STG 50H654

(72-35-00-8-1)

(2)(A)(N)

50S160 2 * SEAL, 15STG 50H665

(72-35-00-9-1)

(2)(A)(N)

The material data that follows is for each engine.

For PW4152(-3), PW4156A(-3), PW4158(-3) Engines:

New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

50S158 2 * SEAL — HPC,

13STG

50H935

(72-35-00-7-1 B)

(2)(A)(C2)

6 SEAL — HPC,

14STG

55H587

(72-35-00-8-2)

(C2)

50S159 2 * SEAL — HPC,

14STG

(2)(A)

AR SEAL — HPC,

15STG

55H588

(72-35-00-9-5 A)

(C2)

AR SEAL — HPC,

15STG

54H335-001

(72-35-00-9-5AA)

(N)

50S160 2 * SEAL — HPC,

15STG

(2)(A)

The material data that follows is for each engine.

For PW4460, PW4462 Engines:

New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

50S158 2 * SEAL — HPC,

13STG

50H935

(72-35-00-7-1)

(2)(A)(C2)

50S159 2 * SEAL — HPC,

14STG

50H654

(72-35-00-8-1)

(2)(A)(N)

50S160 2 * SEAL — HPC,

15STG

50H665

(72-35-00-9-1)

(2)(A)(N)

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 9

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
The material data that follows is for each engine.

For PW4460, PW4462 Engines Converted To Phase(-3) Configuration By Reference 9, Service

Bulletin No. PW4ENG 72-490:

New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

50S158 2 * SEAL, 13STG 50H935

(72-35-00-7-1 B)

(2)(A)(C2)

50S159 2 * SEAL, 14STG 50H654

(72-35-00-8-1)

(2)(A)(N)

50S160 2 * SEAL, 15STG 50H665

(72-35-00-9-1)

(2)(A)(N)

The material data that follows is for each engine.

For PW4460(-3), PW4462(-3) Engines:

New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

50S158 2 * SEAL — HPC,

13STG

50H935

(72-35-00-7-1 B)

(2)(A)(C2)

6 SEAL — HPC,

14STG

55H587

(72-35-00-8-2)

(C2)

50S159 2 * SEAL — HPC,

14STG

(2)(A)

AR SEAL — HPC,

15STG

55H588

(72-35-00-9-5 A)

(C2)

AR SEAL — HPC,

15STG

54H335-001

(72-35-00-9-5AA)

(N)

50S160 2 * SEAL — HPC,

15STG

(2)(A)

Modification and Spares Information

Estimated part prices are provided when they are available at time of publication. The

Estimate of Unit Price is only for planning purposes and does not constitute a firm

quotation. An asterisk (*) is shown where part pricing information was unavailable. In either

case, contact Pratt & Whitney Spares Management & Logistics for firm quotations.

Parts Modification Conditions

(2) The new part is a replacement part only, and cannot be obtained by modification

of the old part.

Spare Parts Availability

(A) The new part is available.

(C2) The old part will continue to be supplied for use in other engine models.

(N) The old part is not available.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 10

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Vendor Services or Special Components/Materials

Not Applicable.

Material Data for Each Spare Engine

The material for each spare engine is as stated in the preceding material information

section.

Reidentified Parts

Not Applicable.

Necessary Tools

No more Support Equipment is necessary.

Other Material Information Data

Not Applicable.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 11

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Accomplishment Instructions

For PW4052, PW4056, PW4060, PW4152, PW4156A, PW4158, PW4460, And PW4462

Engine Models

1. Replace the seals as follows. See Figure 1, Figure 2, Sheet 1 and Figure 3, Sheet 1.

A. Replace 13th Stage Seals, PN 50H935 with PN 50S158.

B. Replace 14th Stage Seals, PN 50H654 with PN 50S159.

C. Replace 15th Stage Seals, PN 50H665 with PN 50S160.

2. If it is necessary to shot peen the drum rotor as specified in Reference 8, CIR Manual,

Chapter/Section 72-35-08, Repair-04, Repair-05 and Repair-22 and Chapter/Section

72-35-10, Repair-04, Repair-13 and Repair-14, then do not shot peen the loading and

locking slots as shown in the Appendix, Part A.

3. Assemble the 13th stage, 14th stage, 15th stage blade, lock, and seals. See Appendix,

Part B, Part C, and Part D for assembly instructions.

For PW4052, PW4056, PW4060, PW4152, PW4156A, PW4158, PW4460, And PW4462 Engine

Models That Incorporate Reference 9, Service Bulletin No. PW4ENG 72-490, Reference 11,

Service Bulletin No. PW4ENG 72-504, Or Reference 16, Service Bulletin No. PW4ENG 72-572.

1. Replace the seals as follows. See Figure 1, Figure 2, Sheet 1 and Figure 3, Sheet 1.

A. Replace 13th Stage Seals, PN 50H935 with PN 50S158.

B. Replace 14th Stage Seals, PN 50H654 with PN 50S159.

C. Replace 15th Stage Seals, PN 50H665 with PN 50S160.

2. If it is necessary to shot peen the drum rotor as specified in Reference 8, CIR Manual,

Chapter/Section 72-35-08, Repair-04, Repair-05 and Repair-22 and Chapter/Section

72-35-10, Repair-04, Repair-13 and Repair-14, then do not shot peen the loading and

locking slots as shown in the Appendix, Part A.

3. Assemble the 13th stage, 14th stage, 15th stage blade, lock, and seals. See Appendix,

Part B, Part C, and Part D for assembly instructions.

For PW4052(-3), PW4056(-3), PW4060(-3), PW4062(-3), PW4062A(-3), PW4152(-3),

PW4156A(-3), PW4158(-3), PW4460(-3), PW4462(-3) Engines Models

1. Replace the seals as follows. See Figure 1, Figure 2, Sheet 2, thru Figure 3, Sheet 2.

A. Replace 13th Stage Seals, PN 50H935 with PN 50S158.

B. Replace 14th Stage Seals, PN 55H587 with PN 50S159.

C. Replace 15th Stage Seals, PN 55H588 or PN 54H335-001 with PN 50S160.

2. If it is necessary to shot peen the drum rotor as specified in Reference 8, CIR Manual,

Chapter/Section 72-35-08, Repair-04, Repair-05 and Repair-22 and Chapter/Section

72-35-10, Repair-04, Repair-13 and Repair-14, then do not shot peen the loading and

locking slots as shown in the Appendix, Part A.

3. Assemble the 13th stage, 14th stage, 15th stage blade, lock, and seals. See Appendix,

Part B, Part C, and Part D for assembly instructions.

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REVISION NO. 1 - June 12/12 Page 12

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
LOCATION OF THE 13TH STAGE SEAL

72-35-00

FIGURE 1

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 13

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
LOCATION OF THE 14TH STAGE SEAL

72-35-00

FIGURE 2, SHEET 1

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 14

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
LOCATION OF THE 14TH STAGE SEAL

72-35-00

FIGURE 2, SHEET 2

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 15

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
LOCATION OF THE 15TH STAGE SEAL

72-35-00

FIGURE 3, SHEET 1

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 16

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
LOCATION OF THE 15TH STAGE SEAL

72-35-00

FIGURE 3, SHEET 2

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PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 17

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Appendix

Parts Progression to Show the Changed Part in Relation to Other Parts

13TH, 14TH AND 15TH STAGE SEALS FOR PHASE(-1) ENGINES AND

ENGINES CONVERTED TO PHASE(-3)

CHART A

13TH, 14TH AND 15TH STAGE SEALS FOR PHASE(-3) ENGINES

CHART B

Added Data

Internal Reference Information

Revision No.

Reference

Document

Origination

Original

EC09KA021

EC09KA021G

EC09KA021X

EC09KA021Y

EC10KK044T

RG/IEL

1 EC10KK044U KVG/MJS

Number values shown in parentheses adjacent to U.S. values are International System of

units (SI) equivalents.

Appendix

NOTE: Reference 8, CIR, Revision 72, dated September 15, 2012 is scheduled to incorporate

the shot peen instructions related to this Service Bulletin and will take precedence

over the Service Bulletin.

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REVISION NO. 1 - June 12/12 Page 18

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Part A: HPC Rear Drum Rotor Loading And Locking Slot — New Shot Peen Specifications

1. Whenever it is necessary to shot peen the HPC rear drum rotor as specified in Reference 8,

CIR, Chapter/Section 72-35-08, Repair-04, -05, and -22 and Chapter/Section 72-35-10,

Repair-04, -13, and -14, do the repair except DO NOT shot peen the loading and locking

slot locations as shown in Figures 4 thru 12.

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REVISION NO. 1 - June 12/12 Page 19

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
13TH STAGE LOAD AND LOCK SLOT LOCATION

FIGURE 4

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
14TH STAGE LOAD AND LOCK SLOT LOCATION

FIGURE 5

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UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
15TH STAGE LOAD AND LOCK SLOT LOCATION

FIGURE 6

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REVISION NO. 1 - June 12/12 Page 22

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
REAR DRUM LOAD AND LOCK SLOT LOCATIONS

FIGURE 7

14TH AND 15TH STAGE LOAD SLOT PEENING SPECIFICATION

FIGURE 8

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REVISION NO. 1 - June 12/12 Page 23

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
13TH, 14TH AND 15TH STAGE LOAD SLOT PEENING SPECIFICATION

FIGURE 9

13TH STAGE LOAD SLOT PEENING SPECIFICATION

FIGURE 10

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REVISION NO. 1 - June 12/12 Page 24

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
13TH, 14TH AND 15TH STAGE LOCK SLOT PEENING SPECIFICATION

FIGURE 11

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REVISION NO. 1 - June 12/12 Page 25

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
14TH AND 15TH STAGE LOCK SLOT PEENING SPECIFICATION

FIGURE 12

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 26

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
NOTE: References 5, 6, and 7 Engine Manual, Revision 99, dated September 1, 2012 are

scheduled to incorporate the revised assembly instructions related to this Service

Bulletin and will take precedence over the Service Bulletin.

Part B: Assemble 13th Stage Blades, Locks And Ladder Seals By The Procedure That Follows:

1. Install 13th stage blades in the axial compressor rotor assembly with Drum Rotor Assembly,

PN 50S813-01 by the procedure that follows. See Figures 13 thru 19.

NOTE: See Reference 5, 6, or 7, Chapter/Section 72-35-01, Assembly-23, for the procedure

to install 13th stage blades in Drum Rotor Assemblies other than, PN 50S813-01.

NOTE: There are three part numbers (sets) of blades provided for this stage. Set Type A,

contains most of the blades to be installed around the drum. Set Type B, has notches

in the right edge of blade platforms. Set Type C, has notches in the left edge of blade

platforms. When Types B and C blades are placed together, clearance is formed for a

blade lock. Set Type A has wide and narrow platforms based on part number so that

these blades can be used for fitting. For ease of assembly, blades in this procedure

will be referred to as Types A, B, and C. See Figure 13.

A. Use an approved marking pen to make a "V" mark directly above the two loading slots 180°

apart and four locking slots. Make the marks on the upper rail of the 13th stage disk. These

marks will be used for future reference. Refer to temporary marking of parts as specified in

Reference 1, Standard Practices Manual, Chapter/Section 70-11-00. See Figure 14.

CAUTION: WHEN YOU NEED TO MOVE AND SET THE BLADES IN THE ASSEMBLY

PROCEDURE WHICH FOLLOWS, USE THE PWA 86448 DRIFT. THE USE

OF A DIFFERENT METHOD TO MOVE AND SET THE BLADES CAN

CAUSE AIRFOIL DAMAGE.

B. Remove the 13th stage blades from their storage rack and put them on a work bench. Find

the four Type B and four Type C blades and move them to one side. See Figure 13.

C. Move to the one of the loading slots and install blades into the 13th stage disk rail with the

blades convex side up as follows:

(1) Install four Type B blades into the loading slot and put them so that the right side

platform of the fourth blade is located midway in the loading slot located 180° from

the assembler.

(2) Install four Type C against the last installed blades.

(3) Install 35 Type A wide platform (regular) blades against the locking blade.

D. Install blades counter-clockwise (left to right) with the blades convex side up as follows:

(1) Install 14 Type A wide platform (regular) blades against the locking blades.

(2) Install 20 Type A narrow platform (spacer) blades against the last installed blade.

NOTE: A total of 77 blades are installed at this time. One regular blade is not

installed at this time.

E. Measure and record the width of the remaining regular blade platform.

NOTE: Do not install the remaining blade at this time.

F. At the blade gap, move the blades tangentially to make the widest possible space between

two blades. This space will be measured and used to calculate the specified clearance

between the blades.

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REVISION NO. 1 - June 12/12 Page 27

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(1) Use a PWA 85595, Spreader, with grooves in the jaws against the blade platforms, to

apply a tangential force to the blades.

(2) Expand the spreader to get the widest possible distance between the blade platforms.

Make sure that each blade platform touches the adjacent blade platform. If you

need help to move the blades, you can tap lightly on the base of the airfoil with a

PWA 86448, Drift.

(3) Pull the blades in a radially outward direction to prevent a circumferential serpentine

shape to the blades.

(4) If necessary, adjust the spreader to get the widest possible distance between the

blade platforms.

(5) With the blade spreader in place, use a dial caliper to measure the blade gap (space

dimension made by the missing blade).

(6) Record the clearance dimension.

G. Calculate the initial blade clearance dimension. Initial clearance "C" = Blade Space

Dimension - Blade Width

H. If the initial clearance "C" is equal to or greater than 0.010 inch (0.254 mm) and less than

or equal to 0.030 inch (0.762 mm) go to blade installation.

I. If the initial clearance "C" is greater than 0.030 inch (0.762 mm), go to blade installation

Method A.

J. If the initial clearance "C" is less than 0.010 inch (0.254 mm), go to blade installation

Method B.

K. Type A blade selection, Method A.

(1) Calculate the number of Type A narrow platform (spacer) blades you must replace

with Type A wide platform (regular) blades.

(2) Calculate Clearance "D". Clearance "D" = Initial Clearance "C" - 0.020 inch or

Clearance "D" = Initial Clearance "C" - (0.508 mm).

(3) Calculate the number of blades to replace "E". "E" = Clearance "D"/0.010 inch or "E"

= Clearance "D"/(0.254 mm).

(4) Round off the number of blades "E" to the nearest whole number to get the number

of Type A wide platform (regular) blades that you must add. Remove one narrow

platform (spacer) blade for each wide platform (regular) blade that you add.

Example 1:

Blade Width = 0.960 inch. Blade Space = 0.991 inch.

Initial Clearance "C" = Blade Space - Blade Width Dimension

"C" = 0.991 - 0.960 inch. "C" = 0.031 inch

Clearance "D" = Initial Space "C" - 0.020 inch

"D" = 0.031 - 0.020 inch. "D" = 0.011 inch

Calculate the number of blades to replace "E"

"E" = "D"/0.010 inch "E" = 0.011 inch/0.010 inch "E" = 1.1

Round to the nearest whole number to get the number of blades to add.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 28

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
"E" = 1 Type A wide platform (regular) blade

L. Type A blade selection, Method B.

(1) Calculate the number of Type A wide platform (regular) blades you must replace with

Type A narrow platform (spacer) blades.

(2) Calculate the Clearance "D".

Clearance "D" = Initial Clearance "C" - 0.020 inch or,

Clearance "D" = Initial Clearance "C" - (0.508 mm)

(3) Calculate the number of blades to replace "E".

"E" = Clearance "D"/0.010 inch or, "E" = Clearance "D"/(0.254 mm)

(4) Round off the number of blades "E" to the nearest whole number to get the number

of Type A narrow platform (spacer) blades that you must add. Remove one wide

platform (regular) blade for each narrow platform (spacer) blade that you add.

Example 2:

Blade Width = 0.960 inch. Blade Space = 0.926 inch

Initial Clearance "C" = Blade Space - Blade Width Dimension

"C" = 0.926 - 0.960 inch. "C" = -0.034 inch

Clearance "D" = Initial Clearance "C" - 0.020 inch

"D" = -0.034 - 0.020 inch. "D" = -0.054 inch

Calculate the number of blades to replace "E".

"E" = "D"/0.010 inch "E" = -0.054 inch/0.010 inch "E" = -5.4.

Round "E" to the nearest whole number and drop the minus sign to get the number

of blades to add.

"E" = 5 Type A narrow platform (spacer) blades.

M. Turn the entire blade set clockwise approximately half the width of a blade platform to

get the blade loading slot.

NOTE: You can use Tape (P05-341) or equivalent at the opposite loading slot so that the

blades will not fall from the loading slot.

N. Install the remaining blade(s), including any replacement blades convex side up.

O. Move the blades tangentially to make the widest possible clearance. Make sure that each

blade platform touches the adjacent blade platform. Pull the blades in a radially outward

direction to prevent a circumferential serpentine shape to the blades.

P. Use a feeler gage to make sure that the gap (clearance) between the blade platforms is

between 0.010 – 0.030 inch (0.25 – 0.76 mm). If the clearance is not in the limits, you must

do the above blade installation procedure and clearance calculation again.

Q. Turn the blade set to remove the blades from the drum.

R. Based on the part number suffix, put the blades into a tray in the sequence shown in Table

15 if you will use 18 spacer blades, Table 16 if you will use 20 spacer blades, or Table 17

if you will use 22 spacer blades.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 29

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
S. If you replace Type A blades to get the correct blade clearance space, put the replacement

blades in the correct position as follows:

(1) Put the Type A wide platform (regular) blades 180° apart and the Type A narrow

platform (spacer) blades 180° apart as best possible.

(2) Equally space the wide platform (regular) and narrow platform (spacer) blades around

the disk as best possible.

T. Use an approved marking pen to make a mark on each blade to show its sequence number

shown in Table 15. The mark should be on the convex side of the upper tip corner.

Table 15: Blade Location/Blade Part Number Suffix

BLADE LOCATION NUMBERS IF YOU USE 18 SPACER BLADES

Column 1 Column 2 Column 3 Column 4 Column 5 Column 6

# Blade # Blade # Blade # Blade # Blade # Blade

1 -01 14 -01 27 -04 40 -01 53 -01 66 -04

2 -01 15 -04 28 -01 41 -01 54 -04 67 -01

3 -04 16 -01 29 -01 42 -04 55 -01 68 -01

4 -01 17 -01 30 -04 43 -01 56 -01 69 -04

5 -01 18 -01 31 -01 44 -01 57 -01 70 -01

6 -01 19 -02 32 -01 45 -01 58 -02 71 -01

7 -04 20 -03 33 -04 46 -04 59 -03 72 -04

8 -01 21 -02 34 -01 47 -01 60 -02 73 -01

9 -01 22 -03 35 -01 48 -01 61 -03 74 -01

10 -01 23 -01 36 -04 49 -01 62 -01 75 -04

11 -04 24 -01 37 -01 50 -04 63 -01 76 -01

12 -01 25 -01 38 -01 51 -01 64 -01 77 -01

13 -01 26 -04 39 -01 52 -01 65 -04 78 -01

NOTE: The blade part number suffixes in this table are based on Type A (regular) blades

that have wide platforms with Suffix -01, Type A (spacer) blades that have

narrow platforms with Suffix -04, Type B blades with Suffix -02, and Type C

blades with Suffix -03.

This chart does not show Type A replaced blades, if any, that can be necessary to

adjust the clearance between the blade platforms. See the text for replacement

blade requirements.

Table 16: Blade Location/Blade Part Number Suffix

BLADE LOCATION NUMBERS IF YOU USE 20 SPACER BLADES

Column 1 Column 2 Column 3 Column 4 Column 5 Column 6

# Blade # Blade # Blade # Blade # Blade # Blade

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
1 -01 14 -01 27 -01 40 -01 53 -01 66 -01

2 -01 15 -04 28 -01 41 -01 54 -04 67 -01

3 -04 16 -01 29 -04 42 -04 55 -01 68 -04

4 -01 17 -01 30 -01 43 -01 56 -01 69 -01

5 -01 18 -01 31 -01 44 -01 57 -01 70 -01

6 -04 19 -02 32 -04 45 -04 58 -02 71 -04

7 -01 20 -03 33 -01 46 -01 59 -03 72 -01

8 -01 21 -02 34 -01 47 -01 60 -02 73 -01

9 -04 22 -03 35 -04 48 -04 61 -03 74 -04

10 -01 23 -01 36 -01 49 -01 62 -01 75 -01

11 -01 24 -01 37 -01 50 -01 63 -01 76 -01

12 -04 25 -04 38 -04 51 -04 64 -04 77 -04

13 -01 26 -01 39 -01 52 -01 65 -01 78 -01

NOTE: The blade part number suffixes in this table are based on Type A (regular)

blades that have wide platforms with Suffix-01, Type A (spacer) blades that have

narrow platforms with Suffix -04, Type B blades with Suffix -02, and Type C

blades with Suffix -03.

This chart does not show Type A replaced blades, if any, that can be necessary to

adjust the clearance between the blade platforms. See the text for replacement

blade requirements.

Table 17: Blade Location/Blade Part Number Suffix

BLADE LOCATION NUMBERS IF YOU USE 22 SPACER BLADES

Column 1 Column 2 Column 3 Column 4 Column 5 Column 6

# Blade # Blade # Blade # Blade # Blade # Blade

1 -04 14 -01 27 -01 40 -04 53 -01 66 -01

2 -01 15 -01 28 -04 41 -01 54 -01 67 -04

3 -01 16 -04 29 -01 42 -01 55 -04 68 -01

4 -04 17 -01 30 -01 43 -04 56 -01 69 -01

5 -01 18 -01 31 -04 44 -01 57 -01 70 -04

6 -01 19 -02 32 -01 45 -01 58 -02 71 -01

7 -04 20 -03 33 -01 46 -01 59 -03 72 -01

8 -01 21 -02 34 -04 47 -01 60 -02 73 -04

9 -01 22 -03 35 -01 48 -01 61 -03 74 -01

10 -04 23 -01 36 -01 49 -04 62 -01 75 -01

11 -01 24 -01 37 -04 50 -01 63 -01 76 -04

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
12 -01 25 -04 38 -01 51 -01 64 -04 77 -01

13 -04 26 -01 39 -01 52 -04 65 -01 78 -01

NOTE: The blade part number suffixes in this table are based on Type A (regular)

blades that have wide platforms with Suffix-01, Type A (spacer) blades that

have narrow platforms with Suffix-04, Type B blades with Suffix-02, and Type C

blades with Suffix-03.

This chart does not show Type A replaced blades, if any, that can be necessary to

adjust the clearance between the blade platforms. See the text for replacement

blade requirements.

U. Make marks to identify the two ladder seals as follows:

(1) Put the two ladder seals on a work bench with the "X" mark down.

(2) Put a Number 1 (#1) mark on one of the ladder seals and a Number 2 (#2) mark

on the second seal.

NOTE: Ladder seal #1 blade slot farthest to the right is the position for blade No. 1

and the next slot to the left is the blade No. 2 and so on. The 19th, 20th,

21st, and 22nd slots are locking blade slots. The openings (cut rungs)

between the 19th, 20th, 21st, and 22nd slots are for blade locks.

Ladder seal #2 blade slot farthest to the right is the position for blade No.

40 and the next slot to the left is for blade No. 41 and so on. The 58th,

59th, 60th and 61st slots are locking blade slots. The openings (cut rungs)

between the 58th and 59th, 60th and 61st slots are for blade locks.

V. Install blades with two assemblers (preferred method).

CAUTION: IN THE FOLLOWING STEPS HANDLE THE LADDER SEAL WITH CARE.

DO NOT BEND OR FOLD THE SEAL SUCH THAT THE SHAPE BECOMES

DEFORMED.

(1) In the following steps, you can apply Antigallant Compound, P06-036 or Dry Film

Lubricant, P06-041 to the ladder seal, disk rim and rails to help assemble the blades

and seals in the disk.

(2) Assembler 1:

(a) Put the ladder seal #1 over one loading slot on the 13th stage disk rim with the X

mark on the seal up (engine forward) and the flat surface toward the assembler.

(b) Align the seal circumferentially so that the cut ring (lock position) on the seal

is over one disk lock slot at one location. A rung of the seal must be over the

loading slot.

(c) Adjust the seal as necessary to install blade No. 21 through the seal and the

loading slot.

NOTE: When you install the blades, make sure that the seals are installed

between the disk rails. Move the blades, locks, and seals in the disk

rail as necessary to complete the blade installation procedure.

(3) Assembler 2:

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December 2/11

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REVISION NO. 1 - June 12/12 Page 32

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(a) Put the ladder seal #2 over the remaining loading slot on the disk rim. The X

mark on the seal up (engine forward) and the flat surface toward the assembler.

NOTE: In the following steps you will install the blades clockwise (right to left).

(b) Align the seal circumferentially so that the cut rung (lock position) on the seal

is over one 13th stage disk lock slot 180° from seal No. 1. A rung of the seal

must be over the loading slot.

(c) Adjust the ladder seal as necessary to install blade No. 60 through the seal and

the loading slot.

NOTE: When you install the blades, make sure that the seals are installed

between the disk rails. Move the blades, locks, and seals in the disk

rail as necessary to complete the blade installation procedure.

(4) Assembler 1:

(a) Install blade No. 21 (-02) through the ladder seal and into the loading slot,

convex side up.

(5) Assembler 2:

(a) Install blade No. 60 (-02) through the ladder seal and into the loading slot,

convex side up.

(6) Turn the blades and seals in the disk rail as needed to put the cut ring in the ladder

seal with the loading slot in the disk.

(7) Install one lock assembly each, through the loading slot into the disk rail and hold the

lock assembly against the installed blade Nos. 21 and 60.

(8) Turn the blades and seals in the disk rail as needed to install the next blade in each

ladder seal.

(9) Assembler 1:

(a) Install blade No. 22 (-03) through the ladder seal and the loading slot.

(10) Assembler 2:

(a) Install blade No. 61 (-03) through the ladder seal and the loading slot.

(11) Turn the blades and seals in the disk rail as needed to install the next blade in each

seal.

(12) Assembler 1:

(a) Install blade No. 23 through the ladder seal and the loading slot.

(13) Assembler 2:

(a) Install blade No. 62 through the ladder seal and the loading slot.

(14) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(15) Assembler 1:

(a) Install blade No. 24 through the ladder seal and the loading slot.

(16) Assembler 2:

(a) Install blade No. 63 through the ladder seal and the loading slot.

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PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 33

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(17) Use the above procedure and continue to assemble the blades in ascending

numerical order.

(18) Assembler 1:

(a) Use the same loading slot to install blade Nos. 40, 41, and so on in ladder

seal #2 until the set of locking blades and lock assembly slots (cut rung) is at

the disk loading slot.

(19) Assembler 2:

(a) Use the same loading slot to install blade Nos. 1, 2, and so on in ladder seal

#1 until the set of locking blades and lock assembly slots (cut rung) is at the

disk loading slot.

(20) Put Tape, P05-341 over the two groups of installed blades to loosely hold the blade

groups together.

(21) Turn the blades, locks, and seals around the disk rail to install the remaining locking

blades and lock assemblies.

(22) Assembler 1:

(a) Install blade No. 58 (-02) through the ladder seal and the loading slot.

(23) Assembler 2:

(a) Install blade No. 19 (-02) through the ladder seal and the loading slot.

(24) Turn the blades, locks, and seals around the disk rail to put the cut rung in the ladder

seal at the loading slot in the disk.

(25) Install one lock assembly each, through the loading slot into the disk rail and hold the

lock assembly against the installed blade Nos. 19 and 58.

(26) Turn the blades and seals in the disk rail as needed to install the next blade in each

seal.

(27) Assembler 1:

(a) Install blade No. 59 (-03) through the ladder seal and the loading slot.

(28) Assembler 2:

(a) Install blade No. 20 (-03) through the ladder seal and the loading slot.

(29) Make sure that no part of the ladder seal can be seen.

(30) Assembler 1 and 2: Move the blades, locks, and ladder seals in the disk rail in the

opposite direction until the blade locks line up with the reference ink marks on the

outer diameter of the 13th stage disk rail.

(31) Tighten and torque the set screws in the four lock and setscrew assemblies.

(a) Torque the setscrew to the running torque plus 4 – 8 lb-in (0.452 – 0.904 N.m).

Use a PWA 83135 Driver and PWA 83136 Extension for multi-spline setscrews.

(32) Check the clearance of the blade lock and the top of the blade platform by one of

the methods that follow:

(a) Method 1: Measure the height clearance between blade lock and the top of the

blade platform, with PWA 78064 Gage. Lock shank must be flush to 0.035 inch

(0.889 mm) below blade platform.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 34

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(b) Method 2: The lock shank top surface must be approximately flush with or below

the blade platform. The top of the setscrew can have up to one full thread

exposed above or recessed below the face of the lock shank.

(c) If these limits are not kept, make sure that the lock is correctly assembled in

the disk.

(33) Blade clearance (called gap) inspection on the both sides of the drum.

(a) Create a blade gap by forcing the (-01) and/or (-04) blades against the locking

blades in each Arc BG. See Figure 14.

(b) Use a feeler gage to make sure that the clearance in each arc is 0.005 inch

(0.127 mm) or greater.

1 If the clearance is less than 0.005 inch (0.127 mm), the blades must be

removed, re-distributed and assembled again to obtain this clearance.

NOTE: You can change the quantity of regular and spacer blades to get

the 0.005 inch (0.127 mm) or greater clearance.

(34) Examine the assembly for foreign objects, damage, and correct assembly.

(35) Install all the necessary protection covers.

Part C: Assemble 14th Stage Blades, Locks And Ladder Seals By The Procedure That Follows:

1. Install 14th stage blades in the (debladed) axial compressor rotor assembly with Drum Rotor

Disk Assembly, PN 50S813-01 by the procedure that follows. See Figures 13 thru 19.

NOTE: See Reference 5, 6, or 7, Chapter/Section 72-35-01, Assembly-22, for the procedure

to install 14th stage blades in Drum Rotor Assemblies other than, PN 50S813-01.

NOTE: There are three part numbers (sets) of blades provided for this stage. Set Type A,

contains most of the blades to be installed around the drum. Set Type B, has notches

in the right edge of blade platforms. Set Type C, has notches in the left edge of blade

platforms. When Types B and C blades are placed together, clearance is formed for a

blade lock. Set Type A has wide and narrow platforms based on part number so that

these blades can be used for fitting. For ease of assembly, blades in this procedure

will be referred to as Types A, B, and C. See Figure 13.

A. Use an approved marking pen to make a "V" mark directly above the two loading slots

180° apart and eight locking slots. Make the marks on the upper rail of the 15th stage

disk. These marks will be used for future reference. Refer to temporary marking of parts

as specified in Reference 1, Standard Practices Manual, Chapter/Section 70-11-00. See

Figure 15.

CAUTION: WHEN YOU NEED TO MOVE AND SET THE BLADES IN THE ASSEMBLY

PROCEDURE WHICH FOLLOWS, USE THE PWA 86448 DRIFT. THE USE

OF A DIFFERENT METHOD TO MOVE AND SET THE BLADES CAN

CAUSE AIRFOIL DAMAGE.

B. Remove the 14th stage blades from their storage rack and put them on a work bench. Find

the eight Type B and eight Type C blades and move them to one side. See Figure 13.

C. Separate the Type A blades that have a part number with a -04 suffix. These are called

spacer blades. Use an approved marking pen to make an "S" mark on the blade tip on the

convex side of the airfoil.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 35

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
D. Install a lock and setscrew assembly into the locking slot to the right of either loading slot

on the 14th stage disk. Assemble the radius on the lock into the locking openings. Use the

PWA 83135, Driver to tighten the setscrew.

E. Move to the loading slot 180° from the blade lock you installed and install the blades and

blade locks into the 14th stage disk rail as follows:

F. Install blades and locks clockwise (right to left), with the blades convex side up as follows:

(1) Install one Type B blade next to the lock.

(2) Install one Type C blade next to the locking blade.

(3) Install one lock and set screw assembly next to the locking blade.

(4) Install one Type B blade next to the lock.

(5) Install one Type C blade next to the locking blade.

(6) Install one lock and set screw assembly next to the locking blade.

(7) Install one Type B blade next to the lock.

G. Continue to install blades and locks clockwise (right to left), with the blades convex side

up as follows:

(1) Install 27 Type A wide platform (regular) blades.

(2) Install two Type A narrow platform (spacer) blades.

(3) Install one Type C locking blade.

(4) Install one lock and setscrew assembly.

(5) Install one Type B locking blade next to the lock.

NOTE: A total of 35 blades and four locks are installed at this time. One regular

blade is not installed at this time.

H. Install blades and locks counter-clockwise (left to right), with the blades convex side up

as follows:

(1) Install one Type C locking blade next to the lock that was installed before.

(2) Install one Type B locking blade next to the locking blade.

(3) Install one lock and setscrew assembly next to the locking blade.

(4) Install one Type C locking blade next to the lock.

(5) Install one Type B locking blade next to the locking blade.

(6) Install one lock and setscrew assembly next to the locking blade.

(7) Install one Type C locking blade next to the lock.

(8) Install one Type B locking blade next to the locking blade.

(9) Install one lock and setscrew assembly next to the locking blade.

(10) Install one Type C locking blade next to the lock.

I. Continue to install blades and locks counter-clockwise (left to right), with the blades convex

side up as follows:

(1) Install 27 Type A wide platform (regular) blades.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 36

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(2) Install two Type A narrow platform (spacer) blades.

(3) Install one Type B locking blade.

(4) Install one lock and setscrew assembly next to the locking blade.

(5) Install one Type C locking blade next to the lock.

NOTE: A total of 74 blades and eight locks are installed at this time. Two Type A

wide platform (regular) blades are not installed at this time.

J. Make sure that four locking blades and two locks are positioned at each loading slot.

K. Position and tighten two locks at the two loading slots only.

L. From the loading slot, move approximately 90° to the assembler’s right and make a

clearance between the blades.

M. Use an approved marking pen to make an "X" mark on the slanted surface of the drum

assembly above the clearance.

N. Move the blades tangentially to make the widest possible space between two blades

as follows:

NOTE: This space will be measured and used to calculate the initial clearance between

the blades.

(1) Use a PWA 85595, Spreader with grooves in the jaws against the blade platforms, to

apply a tangential force to the blades.

(2) Expand the spreader to get the widest possible distance between the blade platforms.

Make sure that each blade platform touches the adjacent blade platform. If you

need help to move the blades, you can tap lightly on the base of the airfoil with a

PWA 86448, Drift.

(3) Pull the blades in a radially outward direction to prevent a circumferential serpentine

shape to the blades.

(4) If necessary, adjust the spreader to get the widest possible distance between the

blade platforms.

(5) With the blade spreader in place, use a dial caliper to measure the blade space

dimension.

(6) Record the clearance dimension as "X1".

(7) Remove the blade spreader from the drum assembly.

O. Measure the width of the remaining regular blade platform. Record the width of the blade

platform as "X2".

P. Move to the opposite side of the drum (approximately 180° form where the blade clearance

was measured and make one clearance between the blades.

Q. Use an approved marking pen to make a "Y" mark on the slanted surface of the drum

assembly above the clearance location.

R. Move the blades tangentially to make the widest possible space between two blades

as follows:

NOTE: This space will be measured and used to calculate the initial clearance between

the blades.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 37

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(1) Use a PWA 85595, Spreader, with grooves in the jaws against the blade platforms, to

apply a tangential force to the blades.

(2) Expand the spreader to get the widest possible distance between the blade platforms.

Make sure that each blade platform touches the adjacent blade platform. If you

need help to move the blades, you can tap lightly on the base of the airfoil with a

PWA 86448, Drift.

(3) Pull the blades in a radially outward direction to prevent a circumferential serpentine

shape to the blades.

(4) If necessary, adjust the spreader to get the widest possible distance between the

blade platforms.

(5) With the blade spreader in place, use a dial caliper to measure the blade space

dimension. Record the dimension as "Y1".

(6) Remove the blade spreader from the drum assembly.

S. Measure the width of the remaining regular blade platform. Record the width of the blade

platform as "Y2".

T. Calculate the initial clearance dimension between the blade platforms for each side of

the drum (Sides X and Y).

Initial Clearance "C" = Blade Space Dim. — Blade Width

U. If the Initial Clearance "C" is equal to or greater than 0.030 inch (0.762 mm) and less than

or equal to 0.050 inch (1.270 mm) go to blade installation.

V. If the Initial Clearance "C" is less than 0.030 inch (0.762 mm), go to the step below for

Type A Blade Selection, Method A.

W. If the Initial Clearance "C" is more than 0.050 inch (1.270 mm), go to the step below for

Type A Blade Selection Method B.

X. Type A Blade Selection, Method A.

(1) Calculate the number of Type A wide platform (regular) blades you must replace with

Type A narrow platform (spacer) blades.

(2) Calculate Clearance "D".

Clearance "D" = Initial Clearance "C" − 0.040 inch, or,

Clearance "D" = Initial Clearance "C" − (1.016 mm)

(3) Calculate the number of blades to replace "E".

"E" = Clearance "D"/0.010 inch, or,

"E" = Clearance "D"/(0.254 mm)

(4) Round off the number of blades "E" to the nearest whole number to get the number

of Type A narrow platform (spacer) blades that you must add. Remove one wide

(regular) blade for each narrow platform (spacer) blade that you must add.

Example 1:

Blade Width = 0.960 inch, Blade Space = 0.931 inch

Initial Clearance "C" = Blade Space − Blade Width

"C" = 0.931 − 0.960 inch. "C" = −0.029 inch

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 38

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Clearance "D" = Initial Clearance "C" − 0.040 inch

"D" = −0.029 − 0.040 inch. "D" = −0.069 inch

Calculate the number of blades to replace "E".

"E" = "D"/0.010 inch. "E" = −0.069 inch/0.010 inch. "E" = −6.9

Round to the nearest whole number and drop the minus sign to determine the number

of blades to replace.

"E" = 7 Type A narrow platform (spacer) blades

Y. Type A blade selection, Method B.

(1) Calculate the number of Type A narrow platform (spacer) blades you must replace

with Type A wide platform (regular) blades.

(2) Calculate Clearance "D".

Clearance "D" = Initial Clearance "C" − 0.040 inch, or,

Clearance "D" = Initial Clearance "C" − (1.016 mm)

(3) Calculate the number of blades to replace "E".

"E" = Clearance "D"/0.010 inch, or,

"E" = Clearance "D"/(0.254 mm)

(4) Round off the number of blades "E" to the nearest whole number to get the number

of Type A wide platform (regular) blades required. Remove one narrow platform

(spacer) blade for each wide platform (regular) blade.

Example 2:

Blade Width = 0.950 inch. Blade Space = 1.015 inches

Initial Clearance "C" = Blade Space − Blade Width

"C" = 1.015 − 0.950 inch "C" = 0.065 inch

Clearance "D" = Initial Clearance "C" − 0.040 inch

"D" = 0.065 − 0.040 inch "D" = 0.025 inch

Calculate the number of blades to replace "E".

"E" = "D"/0.010 inch "E" = 0.025 inch/0.010 inch "E" = 2.5

Round “E” to the nearest whole number and drop the minus sign to determine the

number of blades to replace.

"E" = 3 Type A wide platform (regular) blades

Z. At the two loading slots, loosen the four set screws in the blade locks that were installed

before.

NOTE: You can use Tape (P05-341) or equivalent so that the blades will not fall out as

they pass the loading slots.

AA. Install the remaining Type A blade(s).

(1) Turn the blade and seal assembly counter-clockwise as necessary to get the full

length of the blade loading slot open.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 39

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(2) Install the remaining blades, including any replacement blades for side "X" and side

"Y" of the 14th stage disk.

NOTE: The full set of blades for this stage should be installed at this time.

AB. Turn the blade and seal assembly clockwise to line up the blade locks with the ink marks

on the disk at the loading slots.

AC. Tighten the four setscrews at the two loading slots.

NOTE: Only tighten the four blade locks at the blade loading slots at this time.

AD. Check the space between the blades.

(1) Locate the "X" mark on the drum above the 15th stage disk. At the "X" mark location,

move the blades tangentially to make the widest possible clearance.

(2) Pull the blades in a radially outward direction to prevent a circumferential serpentine

shape to the blades. Make sure that each blade platform touches the adjacent blade

platform and blade lock.

(3) Use a feeler gage to make sure that the clearance between the Type A blade

platforms is 0.030 – 0.050 inch (0.76 – 1.27 mm).

NOTE: There can only be one clearance on each side of the 14th stage disk.

AE. Repeat the above step to check the space between the blades at the "Y" location on the

opposite side of the disk.

AF. If the clearance at the "X" or "Y" side of the disk is less than 0.030 inch (0.762 mm) or

greater than 0.050 inch (1.270 mm), the blades must be removed, redistributed, and

reassembled to meet the requirement.

(1) You can change the quantity of the regular and spacer blades to meet the clearance

requirement at each location.

AG. Loosen the four locks installed at the two blade loading slots.

CAUTION: DO NOT MIX THE BLADES FROM THE "X" SIDE OF THE DRUM WITH

BLADES FROM THE "Y" SIDE OF THE DRUM OR INCORRECT BLADES

PLATFORM SPACES CAN OCCUR.

AH. Remove the blades from the "X" side of the drum and put them in tray locations 1 thru

38 based on part number suffix. Remove the blades from the "Y" side of the drum and

put them in tray locations 39 thru 76 based on part number suffix. See Table 18. If you

replaced Type A wide platform (regular) and narrow platform (spacer) blades to get the

correct blade clearance space, use Table 18 to put the replacement blades in the correct

position as follows:

(1) Equally space the Type A wide platform (regular) and narrow platform (spacer) blades

around the disk as best possible.

(2) Put the Type A wide platform (regular) blades 180° apart and the Type A narrow

platform (spacer) blades 180° apart as best possible.

AI. Use an approved marking pen to make a mark on each blade to show its sequence

number. The mark should be on the convex side of the upper tip corner.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 40

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Table 18: Blade Location/Blade Part Number Suffix

BLADE LOCATION NUMBERS IF YOU USE 22 SPACER BLADES

Column 1 Column 2 Column 3 Column 4 Column 5 Column 6

# Blade # Blade # Blade # Blade # Blade # Blade

1 -01 14 -01 27 -01 40 -01 53 -01 66 -01

2 -01 15 -01 28 -01 41 -01 54 -01 67 -01

3 -01 16 -01 29 -01 42 -01 55 -01 68 -01

4 -01 17 -01 30 -01 43 -01 56 -06 69 -01

5 -01 18 -06 31 -01 44 -06 57 -07 70 -06

6 -06 19 -07 32 -06 45 -07 58 -06 71 -07

7 -07 20 -06 33 -07 46 -01 59 -07 72 -01

8 -01 21 -07 34 -01 47 -01 60 -01 73 -01

9 -01 22 -01 35 -01 48 -01 61 -01 74 -01

10 -01 23 -01 36 -01 49 -01 62 -01 75 -01

11 -01 24 -01 37 -01 50 -01 63 -01 76 -01

12 -01 25 -01 38 -01 51 -04 64 -04

13 -04 26 -04 39 -01 52 -01 65 -01

NOTE: The blade part number suffixes in this table are based on Type A blades that

have wide platforms with suffix -01, and narrow platforms with Suffix -04, Type B

blades with Suffix -07, and Type C blades with Suffix -06.

This table does not show Type A replacement blades, if any, that was necessary

to adjust the clearance between the blade platforms. See the text for replacement

blade requirements.

AJ. Make sure that the center points of the two loading slots and the eight locking slots in the

disk have the ink marks. Reapply the marks if necessary.

AK. Obtain the two ladder seals.

(1) Locate the "X" marks by the cut rung on each seal, and put the seals on a work

bench with the "X" mark side down.

(2) Use an approved marking pen to make a mark on one of the seals with the Number 1

and the other seal with the Number 2.

NOTE: Ladder seal Number 1 − from the "X" Mark, the slot farthest to the right is

the position for blade #1 and the next slot to the left is for blade #2, and so

on. The 6th, 7th, 18th, 19th, 20th, 21st, 32nd, and 33rd slots are locking

blade slots. The openings (cut rungs) between the 6th and 7th, 18th and

19th, 20th and 21st, and 32nd and 33rd are for blade locks.

Ladder seal Number 2 − from the "X" Mark, the slot farthest to the right

is the position for blade #39 and the next slot to the left is for blade #40,

and so on. The 44th, 45th, 56th, 57th, 58th, 59th, 70th, and 71st slots are

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 41

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
locking blade slots. The openings (cut rungs) between the 44th and 45th,

56th and 57th, 58th and 59th, 70th and 71st slots are for blade locks.

AL. Install blades with two assemblers (preferred method).

CAUTION: HANDLE THE SEALS WITH CARE. DO NOT BEND OR FOLD THE

LADDER SEALS SO THE SHAPE BECOMES DEFORMED.

(1) In the following steps, you can apply Antigallant Compound, P06-036 or Dry Film

Lubricant, P06-041 to the ladder seal, disk rim and rails to help assemble the blades

and seals in the disk.

(2) Assembler 1:

(a) In the following steps, when you install the blades, make sure that the seals are

installed between the disk rails. Move the blades, locks, and seal in the disk rail

to complete the blade installation procedure.

NOTE: The blade installation process will be clockwise (right to left) except for

blade Numbers 5 thru 1.

(b) Put the seal Number 1 over one loading slot on the disk rim. The "X" mark on the

seal up (engine forward) and with the flat surface toward the assembler.

(c) Align the seal circumferentially so that the left cut rung (lock position at the center

of the seal) is over one disk lock slot at one location.

NOTE: A rung of the seal must be over the loading slot.

(d) Adjust the seal as necessary so you can install blade Number 20 through the

slot and the disk loading slot.

(3) Assembler 2:

(a) In the following steps, when you install the blades, make sure that the seals are

installed between the disk rails. Move the blades, locks, and seal in the disk rail

to complete the blade installation procedure.

NOTE: The blade loading process will be clockwise (right to left).

(b) Put the seal Number 2 over the remaining loading slot on the disk rim. The

"X" mark on the seal up (engine forward) and with the flat surface toward the

assembler.

(c) Align the seal circumferentially so that the right cut rung (lock position at the

center of the seal) is over the lock slot 180° from seal Number 1.

NOTE: A rung of the seal must be over the loading slot.

(d) Adjust the seal as necessary so you can install blade Number 58 through the

slot and the disk loading slot.

(4) Assembler 1:

(a) Install blade Number 20 (-06) through the ladder seal and the loading slot,

convex side up.

(5) Assembler 2:

(a) Install blade Number 58 (-06) through the ladder seal and the loading slot,

convex side up.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 42

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(6) Turn the blades and seal in the disk rail as needed to put the cut rung in the seal

with the loading slot in the disk.

(7) Install one lock assembly each, through the loading slot into the disk rail. Hold the

lock assembly against the installed blades (Numbers 20 and 58).

(8) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(9) Assembler 1:

(a) Install blade Number 21 (-07) through the ladder seal and the loading slot,

convex side up.

(10) Assembler 2:

(a) Install blade Number 59 (-07) through the ladder seal and the loading slot,

convex side up.

(11) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(12) Assembler 1:

(a) Install blade Number 22 through the ladder seal and the loading slot, convex

side up.

(13) Assembler 2:

(a) Install blade Number 60 through the ladder seal and the loading slot, convex

side up.

(14) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(15) Assembler 1:

(a) Install blade Number 23 through the ladder seal and the loading slot, convex

side up.

(16) Assembler 2:

(a) Install blade Number 61 through the ladder seal and the loading slot, convex

side up.

(17) Use the above procedure and continue to install the blades in ascending numerical

order until you reach the next set of locking blades and lock assembly slots (cut rung).

(18) Turn the blades, locks, and seals in the disk rail as needed to install blade Numbers

32 and Number 70 in the applicable seal.

(19) Assembler 1:

(a) Install blade Number 32 (-06) through the ladder seal and the loading slot,

convex side up.

(20) Assembler 2:

(a) Install blade Number 70 (-06) through the ladder seal and the loading slot,

convex side up.

(21) Turn the blades, locks, and seals in the disk rail as needed to get the cut rungs in

the seal at the loading slot in the disk.

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 43

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(22) Install one lock assembly each, through the loading slot into the disk rail. Hold the

lock assembly against the installed blades (Numbers 32 and 70).

(23) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(24) Assembler 1:

(a) Install blade Number 33 (-07) through the ladder seal and the loading slot,

convex side up.

(25) Assembler 2:

(a) Install blade Number 71 (-07) through the ladder seal and the loading slot,

convex side up.

(26) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(27) Assembler 1:

(a) Install blade Number 34 through the ladder seal and the loading slot, convex

side up.

(28) Assembler 2:

(a) Install blade Number 72 through the ladder seal and the loading slot, convex

side up.

(29) Use the above procedure and continue to install the blades in ascending numerical

order until you install blade Numbers 38 and 76 in the applicable seals.

(30) Assembler 1:

(a) Use the same blade loading slot and install blade Numbers 39, 40, and so on in

seal Number 2 until you reach the set of locking blades and the lock assembly

slots (cut rung) is at the disk loading slot.

(31) Assembler 2:

(a) Use the same slot and install blade Numbers 1, 2, and so on in seal Number 1

until you reach the set of locking blades and the lock assembly slots (cut rung) is

at the disk loading slot.

(32) Turn the blades, locks, and seals in the disk rail as needed to install blade Numbers

44 and 6 in the applicable seal.

(33) Assembler 1:

(a) Install blade Number 44 (-06) through the ladder seal and the loading slot,

convex side up.

(34) Assembler 2:

(a) Install blade Number 6 (-06) through the ladder seal and the loading slot, convex

side up.

(35) Turn the blades, locks, and seals in the disk rail as needed to get the cut rung in

the seals at the loading slot in the disk.

(36) Install one lock assembly each, through the loading slot into the disk rail. Hold the

lock assembly against the installed blades (Numbers 44 and 6).

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REVISION NO. 1 - June 12/12 Page 44

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(37) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(38) Assembler 1:

(a) Install blade Number 45 (-07) through the ladder seal and the loading slot,

convex side up.

(39) Assembler 2:

(a) Install blade Number 7 (-07) through the ladder seal and the loading slot, convex

side up.

(40) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(41) Assembler 1:

(a) Install blade Number 46 through the ladder seal and the loading slot, convex

side up.

(42) Assembler 2:

(a) Install blade Number 8 through the ladder seal and the loading slot, convex

side up.

(43) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(44) Assembler 1:

(a) Install blade Number 47 through the ladder seal and the loading slot, convex

side up.

(45) Assembler 2:

(a) Install blade Number 9 through the ladder seal and the loading slot, convex

side up.

(46) Use the above procedure and continue to install the blades in ascending numerical

order until you have the next set of locking blades and lock assembly slots (cut rung)

at the disk loading slot.

(47) Turn the blades, locks, and seals in the disk rail as needed to install blade Numbers

56 and Number 18 in the applicable seal.

(48) Assembler 1:

(a) Install blade Number 56 (-06) through the ladder seal and the loading slot,

convex side up.

(49) Assembler 2:

(a) Install blade Number 18 (-06) through the ladder seal and the loading slot,

convex side up.

(50) Turn the blades, locks, and seals in the disk rail as needed to get the cut rung in

the seals at the loading slot in the disk.

(51) Install one lock assembly each, through the loading slot into the disk rail. Hold the

lock assembly against the installed blades (Numbers 56 and 18).

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 45

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(52) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(53) Assembler 1:

(a) Install blade Number 57 (-07) through the ladder seal and the loading slot,

convex side up.

(54) Assembler 2:

(a) Install blade Number 19 (-07) through the ladder seal and the loading slot,

convex side up.

(55) Make sure that no part of the ladder seal can be seen.

(56) Turn the blades, locks, and seals in the opposite direction until the blade locks line up

with the reference ink marks on the outer diameter of the 14th stage disk rail.

AM. If necessary, remove tape.

AN. Tighten and torque the set screws in the eight lock and setscrew assemblies.

(1) Torque the setscrew to the running torque plus 4 – 8 lb-in (0.452 – 0.904 N.m). Use a

PWA 83135, Driver and PWA 83136, Extension for multi-spline setscrews.

AO. Check the clearance of the blade lock and the top of the blade platform by one of the

methods that follow:

(1) Method 1: Measure the height clearance between blade lock and the top of the blade

platform, with PWA 78064, Gage. Lock shank must be flush to 0.035 inch (0.889 mm)

below blade platform.

(2) Method 2: The lock shank top surface must be approximately flush with or below the

blade platform. The top of the setscrew can have up to one full thread exposed above

or recessed below the face of the lock shank.

(3) If these limits are not kept, check the lock for correct assembly in the disk.

AP. Blade clearance (called gap) inspection on the "X" and "Y" sides of the drum.

(1) Create a blade gap by forcing the (-01) and/or (-04) blades against the locking blades

in each arc.

(2) There are three gaps to check in the "X" side, and three in the "Y" side of the drum.

See Arcs DG and DH in Figure 15.

(3) Use a feeler gage to make sure that the clearance in each of the six arcs is 0.009 inch

(0.229 mm) or greater.

(a) If the clearance is less than 0.009 inch (0.229 mm), you must remove the blades,

redistribute and assemble the blades again to get in this requirement.

NOTE: You can also change the quantity of regular and spacer blades to get

the 0.009 inch (0.229 mm) dimension.

AQ. Examine the assembly for foreign objects, damage, and correct assembly.

AR. Install all the necessary protection covers.

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REVISION NO. 1 - June 12/12 Page 46

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Part D: Assemble 15th Stage Blades, Locks And Ladder Seals By The Procedure That Follows:

1. Install 15th stage blades in the (debladed) axial compressor rotor assembly with Drum Rotor

Assembly, PN 50S813-01 by the procedure that follows. See Figures 13 thru 19.

NOTE: See Reference 5, 6, or 7, Chapter/Section 72-35-01, Assembly-21, for the procedure

to install 15th stage blades in Drum Rotor Assemblies other than, PN 50S813-01.

NOTE: There are three part numbers (sets) of blades provided for this stage. Set Type A,

contains most of the blades to be installed around the drum. Set Type B, has notches

in the right edge of blade platforms. Set Type C, has notches in the left edge of blade

platforms. When Types B and C blades are placed together, clearance is formed for a

blade lock. Set Type A has wide and narrow platforms based on part number so that

these blades can be used for fitting. For ease of assembly, blades in this procedure

will be referred to as Types A, B, and C. See Figure 13.

A. Use an approved marking pen to make a "V" mark directly above the two loading slots

180° apart and eight locking slots. Make the marks on the upper rail of the 15th stage

disk. These marks will be used for future reference. Refer to temporary marking of parts

as specified in Reference 1, Standard Practices Manual, Chapter/Section 70-11-00. See

Figure 16.

CAUTION: WHEN YOU NEED TO MOVE AND SET THE BLADES IN THE ASSEMBLY

PROCEDURE WHICH FOLLOWS, USE THE PWA 86448 DRIFT. THE USE

OF A DIFFERENT METHOD TO MOVE AND SET THE BLADES CAN

CAUSE AIRFOIL DAMAGE.

B. Remove the 15th stage blades from their storage rack and put them on a work bench. Find

the eight Type B and eight Type C blades and move them to one side. See Figure 13.

C. Separate the Type A blades that have a part number with a -04 suffix. These are called

spacer blades. Use an approved marking pen to make an "S" mark on the blade tip on the

convex side of the airfoil.

D. Install a lock and setscrew assembly into the locking slot to the right of either loading

slot on the 15th stage disk (lower disk). Assemble the radius on the lock into the locking

openings. Use the PWA 83135, Driver and PWA 83136, Extension to tighten the setscrew.

E. Move to the loading slot 180° from the blade lock you installed and install the blades and

blade locks into the 15th stage disk rail as follows:

F. Install blades and locks in a clockwise (right to left) with the blades convex side up as

follows:

(1) Install one Type B blade next to the lock.

(2) Install one Type C blade next to the locking blade.

(3) Install one lock and set screw assembly next to the locking blade.

(4) Install one Type B blade next to the lock.

(5) Install one Type C blade next to the locking blade.

(6) Install one lock and set screw assembly next to the locking blade.

(7) Install one Type B blade next to the lock.

G. Continue to install blades and locks in a clockwise (right to left) with the blades convex

side up as follows:

(1) Install 20 Type A wide platform (regular) blades.

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REVISION NO. 1 - June 12/12 Page 47

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(2) Install six Type A narrow platform (spacer) blades.

(3) Install one Type C locking blade.

(4) Install one lock and setscrew assembly.

(5) Install one Type B locking blade next to the lock.

NOTE: A total of 33 blades and four locks are installed at this time. One regular

blade is not installed at this time.

H. Install blades and locks in a counter-clockwise (left to right) with the blades convex side

up as follows:

(1) Install one Type C locking blade next to the lock that was installed before.

(2) Install one Type B locking blade next to the locking blade.

(3) Install one lock and setscrew assembly.

(4) Install one Type C locking blade next to the lock.

(5) Install one Type B locking blade next to the locking blade.

(6) Install one lock and setscrew assembly.

(7) Install one Type C locking blade next to the lock.

(8) Install one Type B locking blade next to the locking blade.

(9) Install one lock and setscrew assembly.

(10) Install one Type C locking blade next to the lock.

I. Continue to install blades and locks, counter-clockwise (left to right), with the blades

convex side up as follows:

(1) Install 20 Type A wide platform (regular) blades.

(2) Install six Type A narrow platform (spacer) blades.

(3) Install one Type B locking blade.

(4) Install one lock and setscrew assembly.

(5) Install one Type C locking blade.

NOTE: A total of 68 blades and eight locks are installed at this time. Two Type A

wide platform (regular) blades are not installed at this time.

J. Make sure that four locking blades and two locks are positioned at each loading slot.

K. Position and tighten two locks at the two loading slots only.

L. From the loading slot, move approximately 90° to the assembler’s right and make a

clearance between the blades.

M. Use an approved marking pen to make an "X" mark on the slanted surface of the drum

assembly above the clearance.

N. Move the blades tangentially to make the widest possible space between two blades. This

space will be measured and used to calculate the specified clearance gap between the

blades. See Figure 19, Sheet 3.

(1) Use a PWA 85595, Spreader, with grooves in the jaws against the blade platforms, to

apply a tangential force to the blades.

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December 2/11

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REVISION NO. 1 - June 12/12 Page 48

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(2) Expand the spreader to get the widest possible distance between the blade platforms.

Make sure that each blade platform touches the adjacent blade platform. If you

need help to move the blades, you can tap lightly on the base of the airfoil with a

PWA 86448, Drift.

(3) Pull the blades in a radially outward direction to prevent a circumferential serpentine

shape to the blades.

(4) If necessary, adjust the spreader to get the widest possible distance between the

blade platforms.

(5) With the blade spreader in place, use a dial caliper to measure the blade space

dimension.

(6) Record the clearance dimension as "X1".

(7) Remove the blade spreader from the drum assembly.

O. Measure the width of the remaining regular blade platform. Record the width of the

blade as "X2".

P. Move to the opposite side of the drum (approximately 180° form where the blade clearance

was measured and make one clearance between the blades.

Q. Use an approved marking pen to make a "Y" mark on the slanted surface of the drum

assembly above the clearance location.

R. Move the blades tangentially to make the widest possible space between two blades

as follows:

NOTE: This space will be measured and used to calculate the initial clearance between

the blades.

(1) Use a PWA 85595 Spreader, with grooves in the jaws against the blade platforms, to

apply a tangential force to the blades.

(2) Expand the spreader to get the widest possible distance between the blade platforms.

Make sure that each blade platform touches the adjacent blade platform. If you

need help to move the blades, you can tap lightly on the base of the airfoil with a

PWA 86448 Drift.

(3) Pull the blades in a radially outward direction to prevent a circumferential serpentine

shape to the blades.

(4) If necessary, adjust the spreader to get the widest possible distance between the

blade platforms.

(5) With the blade spreader in place, use a dial caliper to measure the blade space

dimension. Record the dimension as "Y1".

(6) Remove the blade spreader from the drum assembly.

S. Measure the width of the remaining regular blade platform. Record the width of the

blade as "Y2".

T. Calculate the initial clearance dimension between the blade platforms for the "X" and "Y"

sides of the drum.

Initial Clearance "C" = Blade Space Dim. − Blade Width

U. If the Initial Clearance "C" is equal to or greater than 0.060 inch (1.524 mm) and less than

or equal to 0.080 inch (2.032 mm) go to blade installation.

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December 2/11

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REVISION NO. 1 - June 12/12 Page 49

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
V. If the Initial Clearance "C" is less than 0.060 inch (1.524 mm), go to Type A blade

replacement selection Method A.

W. If the Initial Clearance "C" is more than 0.080 inch (2.032 mm), go to Type A blade

replacement selection Method B.

X. Type A Blade Selection, Method A.

(1) Calculate the number of Type A wide platform (regular) blades you must replace with

Type A narrow platform (spacer) blades.

(2) Calculate Clearance "D".

Clearance "D" = Initial Clearance "C" − 0.070 inch or,

Clearance "D" = Initial Clearance "C" − (1.778 mm)

(3) Calculate the number of blades to replace "E".

"E" = Clearance "D"/0.010 inch or, "E" = Clearance "D"/(0.254 mm)

(4) Round off the number of blades "E" to the nearest whole number to get the number

of Type A narrow platform (spacer) blades that you must add. Remove one wide

(regular) blade for each narrow platform (spacer) blade that you must add.

Example 1:

Blade Width = 0.960 inch. Blade Space = 0.931 inch

Initial Clearance "C" = Blade Space − Blade Width

"C" = 0.931 − 0.960 inch. "C" = −0.029 inch

Clearance "D" = Initial Clearance "C" − 0.070 inch

"D" = −0.029 − 0.070 inch. "D" = −0.099 inch

Calculate the number of blades to replace "E".

"E" = "D"/0.010 inch. "E" = −0.099 inch/0.010 inch. "E" = −9.9

Round "E" to the nearest whole number and drop the minus sign to determine the

number of wide platform (regular) blades to replace.

"E" = 10 Type A narrow platform (spacer) blades

Y. Type A Blade Selection, Method B.

(1) Calculate the number of Type A narrow platform (spacer) blades you must replace

with Type A wide platform (regular) blades.

(2) Calculate Clearance "D".

Clearance "D" = Initial Clearance "C" − 0.070 inch, or,

Clearance "D" = Initial Clearance "C" − (1.778 mm)

(3) Calculate the number of blades to replace "E".

"E" = "D"/0.010 inch or, "E" = "D"/(0.254 mm)

(4) Round off the number of blades E to the nearest whole number to get the number of

Type A wide platform (regular) blades required. Remove one narrow platform (spacer)

blade for each wide platform (regular) blade that you must add.

Example 2:

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 50

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Blade Width = 0.920 inch. Blade Space = 1.001 inches

Initial Clearance "C" = Blade Space − Blade Width

"C" = 1.001 − 0.920 inch. "C" = 0.081 inch

Clearance "D" = Initial Clearance "C" − 0.070 inch

"D" = 0.081 − 0.070 inch. "D" = 0.011 inch

Calculate the number of blades to replace "E".

"E" = "D"/0.010 inch. "E" = 0.011 inch/0.010 inch. "E" = 1.1

Round "E" to the nearest whole number to determine the number of blades to replace.

"E" = 1 Type A wide platform (regular) blade

Z. At the two loading slots, loosen the four set screws in the blade locks that were installed

before.

NOTE: You can use Tape, P05-341 or equivalent at the opposite loading slot so that the

blades will not fall out.

AA. Install the remaining Type A blade(s).

(1) Turn the full blade set counter-clockwise as necessary to get the full length of the

blade loading slot open.

(2) Install the remaining blades, including any replacement blades for side "X" and side

"Y" of the 15th stage disk.

NOTE: The full set of blades for this stage should be installed at this time.

AB. Turn the full blade set clockwise until the blade locks line up with the ink marks on the

disk at the loading slots.

AC. Tighten the four setscrews at the two loading slots.

NOTE: Only tighten the four blade locks at the blade loading slots.

AD. Check the space between the blades.

(1) Locate the "X" mark on the drum above the 15th stage disk. At the "X" mark location,

move the blades tangentially to make the widest possible clearance.

(2) Pull the blades in a radially outward direction to prevent a circumferential serpentine

shape to the blades. Make sure that each blade platform touches the adjacent blade

platform and blade lock.

NOTE: There can only be one clearance on each side of the 15th stage disk.

(3) Use a feeler gage to make sure that the clearance between the Type A blade platforms

is 0.060 – 0.080 inch (1.52 – 2.03 mm). If the clearance is not in the limits, you must

remove and redistribute the blades and calculate the clearance dimension again.

NOTE: You can change the quantity of regular and spacer blades to get the

0.060 – 0.080 inch (1.52 – 2.03 mm) clearance.

AE. Repeat the above step to check the space between the blades at the "Y" location on the

opposite side of the disk.

AF. The total clearance for both sides is 0.120 – 0.160 inch (3.05 – 4.06 mm).

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REVISION NO. 1 - June 12/12 Page 51

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
AG. If the clearance at the "X" or "Y" side of the disk is less than 0.060 inch (1.524 mm) or

greater than 0.080 inch (2.032 mm), the blades must be removed, redistributed, and

reassembled to get the requirement.

NOTE: You can change the quantity of the regular and spacer blades to get the clearance

requirement at each location.

AH. Loosen the four locks installed at the two blade loading slots.

CAUTION: DO NOT MIX THE BLADES FROM THE "X" SIDE OF THE DRUM WITH

BLADES FROM THE "Y" SIDE OF THE DRUM OR INCORRECT BLADE

PLATFORM SPACES CAN OCCUR.

AI. Remove the blades from the "X" side of the drum and put them in tray locations 1 through

35 based on part number suffix. Remove the blades from the "Y" side of the drum and

put them in tray locations 36 through 70 based on part number suffix. See Table 19. If

you replaced Type A wide platform (regular) and narrow platform (spacer) blades to get

the correct blade clearance space, use Table 19 to put the replacement blades in the

correct position as follows:

(1) Equally space the wide platform (regular) and narrow platform (spacer) blades around

the disk as best possible.

(2) Put the Type A wide platform (regular) blades 180° apart and the Type A narrow

platform (spacer) blades 180° apart as best possible.

AJ. Use an approved marking pen to make a mark on each blade to show its sequence

number. The mark should be on the convex side of the upper tip corner.

Table 19: Blade Location/Blade Part Number Suffix

Column 1 Column 2 Column 3 Column 4 Column 5 Column 6

# Blade # Blade # Blade # Blade # Blade # Blade

1 -04 14 -01 27 -01 40 -01 53 -07 66 -07

2 -01 15 -01 28 -01 41 -06 54 -06 67 -01

3 -01 16 -01 29 -01 42 -07 55 -07 68 -01

4 -01 17 -06 30 -06 43 -01 56 -01 69 -01

5 -01 18 -07 31 -07 44 -01 57 -01 70 -04

6 -06 19 -06 32 -01 45 -01 58 -01

7 -07 20 -07 33 -01 46 -01 59 -04

8 -01 21 -01 34 -01 47 -04 60 -04

9 -01 22 -01 35 -04 48 -04 61 -01

10 -01 23 -01 36 -04 49 -01 62 -01

11 -01 24 -04 37 -01 50 -01 63 -01

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UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
12 -04 25 -04 38 -01 51 -01 64 -01

13 -04 26 -01 39 -01 52 -06 65 -06

NOTE: The blade part number suffixes in this table are based on Type A blades that

have wide platforms with Suffix -01 and narrow platforms with Suffix -04, Type B

blades with Suffix -07, and Type C blades with Suffix -06.

This table does not show Type A replacement blades, if any, that was necessary

to adjust the clearance between the blade platforms. See the text for replacement

blade requirements.

AK. Make sure that the center points of the two loading slots and the eight locking slots in the

disk have the ink marks. Reapply the marks if necessary.

AL. Obtain the two ladder seals.

(1) Locate the "X" marks by the cut rung on each seal, and put the seals on a work

bench with the "X" mark side down.

(2) Use an approved marking pen to make a mark on one of the seals with the Number 1

and the other seal with the Number 2.

NOTE: Ladder seal Number 1 − from the "X" Mark, the slot farthest to the right is the

position for blade #1 and the next slot to the left is for blade #2, and so on.

The 6th, 7th, 17th, 18th, 19th, 20th, 30th, and 31st slots are locking blade

slots. The openings (cut rungs) between the 6th and 7th, 17th and 18th,

19th and 20th, 30th and 31st are for blade locks.

Ladder seal Number 2 − from the "X" Mark, the slot farthest to the right is

the position for blade #36 and the next slot to the left is for blade #37, and

so on. The 41st, 42nd, 52nd, 53rd, 54th, 55th, 65th, and 66th slots are

locking blade slots. The openings (cut rungs) between the 41st and 42nd,

52nd and 53rd, 54th and 55th, 65th and 66th slots are for blade locks.

AM. Install blades with two assemblers (preferred method).

CAUTION: HANDLE THE SEALS WITH CARE. DO NOT BEND OR FOLD THE

LADDER SEALS SO THE SHAPE BECOMES DEFORMED.

(1) In the following steps, you can apply Antigallant Compound, P06-036 or Dry Film

Lubricant, P06-041 to the ladder seal, disk rim and rails to help assemble the blades

and seals in the disk.

(2) Assembler 1:

(a) In the following steps, when you install the blades, make sure that the seals are

installed between the disk rails. Move the blades, locks, and seal in the disk rail

to complete the blade installation procedure.

NOTE: The blade installation process will be clockwise (left to right) except for

blade Numbers 5 thru 1.

(b) Put the ladder seal Number 1 over one loading slot on the disk rim. The "X" mark

on the seal up (engine forward) and with the flat surface toward the assembler.

(c) Align the seal circumferentially so that the right cut rung (lock position at the

center of the seal) is over one disk lock slot at one location.

NOTE: A rung of the seal must be over the loading slot.

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December 2/11

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REVISION NO. 1 - June 12/12 Page 53

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(d) Adjust the seal as necessary so you can install blade Number 19 through the

slot and the disk loading slot.

(3) Assembler 2:

(a) In the following steps, when you install the blades, make sure that the seals are

installed between the disk rails. Move the blades, locks, and seal in the disk rail

to complete the blade installation procedure.

NOTE: The blade loading process will be clockwise (left to right).

(b) Put the ladder seal Number 2 over the remaining loading slot on the disk rim.

The "X" mark on the seal up (engine forward) and with the flat surface toward

the assembler.

(c) Align the seal circumferentially so that the right cut rung (lock position at the

center of the seal) is over the lock slot 180° from ladder seal Number 1.

NOTE: A rung of the seal must be over the loading slot.

(d) Adjust the seal as necessary so you can install blade Number 54 through the

slot and the disk loading slot.

(4) Assembler 1:

(a) Install blade Number 19 (-06) through the ladder seal and the loading slot,

convex side up.

(5) Assembler 2:

(a) Install blade Number 54 (-06) through the ladder seal and the loading slot,

convex side up.

(6) Turn the blades and seal in the disk rail as needed to put the cut rung in the seal

with the loading slot in the disk.

(7) Install one lock assembly each, through the loading slot into the disk rail. Hold the

lock assembly against the installed blades (Numbers 19 and 54).

(8) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(9) Assembler 1:

(a) Install blade Number 20 (-07) through the ladder seal and the loading slot,

convex side up.

(10) Assembler 2:

(a) Install blade Number 55 (-07) through the ladder seal and the loading slot,

convex side up.

(11) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(12) Assembler 1:

(a) Install blade Number 21 through the ladder seal and the loading slot, convex

side up.

(13) Assembler 2:

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December 2/11

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REVISION NO. 1 - June 12/12 Page 54

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(a) Install blade Number 57 through the ladder seal and the loading slot, convex

side up.

(14) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(15) Assembler 1:

(a) Install blade Number 22 through the ladder seal and the loading slot, convex

side up.

(16) Assembler 2:

(a) Install blade Number 58 through the ladder seal and the loading slot, convex

side up.

(17) Use the above procedure and continue to install the blades in ascending numerical

order until you reach the next set of locking blades and lock assembly slots (cut rung).

(18) Turn the blades, locks, and seals in the disk rail as needed to install blade Numbers

30 and Number 65 in the applicable seal.

(19) Assembler 1:

(a) Install blade Number 30 (-06) through the ladder seal and the loading slot,

convex side up.

(20) Assembler 2:

(a) Install blade Number 65 through the ladder seal and the loading slot, convex

side up.

(21) Turn the blades, locks, and seals in the disk rail as needed to get the cut rungs in

the seal at the loading slot in the disk.

(22) Install one lock assembly each, through the loading slot into the disk rail. Hold the

lock assembly against the installed blades (Numbers 30 and 65).

(23) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(24) Assembler 1:

(a) Install blade Number 31 (-07) through the ladder seal and the loading slot,

convex side up.

(25) Assembler 2:

(a) Install blade Number 66 (-07) through the ladder seal and the loading slot,

convex side up.

(26) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(27) Assembler 1:

(a) Install blade Number 32 through the ladder seal and the loading slot, convex

side up.

(28) Assembler 2:

(a) Install blade Number 67 through the ladder seal and the loading slot, convex

side up.

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REVISION NO. 1 - June 12/12 Page 55

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(29) Use the above procedure and continue to install the blades in ascending numerical

order until you install blade Numbers 35 and 70 in the applicable seals.

(30) Assembler 1:

(a) Use the same slot and install blade Numbers 36, 37, and so on in ladder seal

Number 2 until you reach the set of locking blades and the lock assembly slots

(cut rung) is at the disk loading slot.

(31) Assembler 2:

(a) Use the same slot and install blade Numbers 1, 2, and so on in ladder seal

Number 1 until you reach the set of locking blades and the lock assembly slots

(cut rung) is at the disk loading slot.

(32) Turn the blades, locks, and seals in the disk rail as needed to install blade Numbers

41 and 6 in the applicable seal.

(33) Assembler 1:

(a) Install blade Number 41 (-06) through the ladder seal and the loading slot,

convex side up.

(34) Assembler 2:

(a) Install blade Number 6 (-06) through the ladder seal and the loading slot, convex

side up.

(35) Turn the blades, locks, and seals in the disk rail as needed to get the cut rung in

the seals at the loading slot in the disk.

(36) Install one lock assembly each, through the loading slot into the disk rail. Hold the

lock assembly against the installed blades (Numbers 41 and 6).

(37) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(38) Assembler 1:

(a) Install blade Number 42 (-07) through the ladder seal and the loading slot,

convex side up.

(39) Assembler 2:

(a) Install blade Number 7 (-07) through the ladder seal and the loading slot, convex

side up.

(40) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(41) Assembler 1:

(a) Install blade Number 43 through the ladder seal and the loading slot, convex

side up.

(42) Assembler 2:

(a) Install blade Number 8 through the ladder seal and the loading slot, convex

side up.

(43) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

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REVISION NO. 1 - June 12/12 Page 56

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(44) Assembler 1:

(a) Install blade Number 44 through the ladder seal and the loading slot, convex

side up.

(45) Assembler 2:

(a) Install blade Number 9 through the ladder seal and the loading slot, convex

side up.

(46) Use the above procedure and continue to install the blades in ascending numerical

order until you have the next set of locking blades and lock assembly slots (cut rung)

at the disk loading slot.

(47) Turn the blades, locks, and seals in the disk rail as needed to install blade Numbers

52 and Number 17 in the applicable seal.

(48) Assembler 1:

(a) Install blade Number 52 (-06) through the ladder seal and the loading slot,

convex side up.

(49) Assembler 2:

(a) Install blade Number 17 (-06) through the ladder seal and the loading slot,

convex side up.

(50) Turn the blades, locks, and seals in the disk rail as needed to get the cut rung in

the seals at the loading slot in the disk.

(51) Install one lock assembly each, through the loading slot into the disk rail. Hold the

lock assembly against the installed blades (Numbers 52 and 17).

(52) Turn the blades, locks, and seals in the disk rail as needed to install the next blade

in each seal.

(53) Assembler 1:

(a) Install blade Number 53 (-07) through the ladder seal and the loading slot,

convex side up.

(54) Assembler 2:

(a) Install blade Number 18 (-07) through the ladder seal and the loading slot,

convex side up.

(55) Make sure that no part of the ladder seal can be seen.

(56) Assembler 1 and 2: Move the blades, locks, and seals in the disk rail in the opposite

direction until the blade locks line up with the reference ink marks on the outer

diameter of the 15th stage disk rail.

AN. If necessary, remove tape.

AO. Tighten and torque the set screws in the eight lock and setscrew assemblies.

(1) Torque the setscrew to the running torque plus 4 – 8 lb-in (0.452 – 0.904 N.m). Use a

PWA 83135 Driver, and PWA 83136, Extension for multi-spline setscrews.

AP. Check the clearance of the blade lock and the top of the blade platform by one of the

methods that follow:

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REVISION NO. 1 - June 12/12 Page 57

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(1) Method 1: Measure the height clearance between blade lock and the top of the blade

platform, with PWA 78064, Gage. Lock shank must be flush to 0.035 inch (0.889 mm)

below blade platform.

(2) Method 2: The lock shank top surface must be approximately flush with or below the

blade platform. The top of the setscrew can have up to one full thread exposed above

or recessed below the face of the lock shank.

(3) If these limits are not kept, check the lock for correct assembly in the disk.

AQ. Blade clearance (to be referred as gap) inspection on the "X" and "Y" sides of the drum.

(1) Create a blade gap by forcing the (-01) and/or (-04) blades against the locking blades

in each arc.

(2) There are three gaps to check in the "X" side, and three in the "Y" side of the drum.

See Arcs DG and DH in Figure 16.

(3) Use a feeler gage to make sure that the clearance in each of the six arcs is 0.019 inch

(0.483 mm) or greater.

(a) If the clearance is less than 0.019 inch (0.483 mm), you must remove,

redistribute, and assemble the blades again to get in this clearance.

NOTE: You can also change the quantity of regular and spacer blades to get

the 0.019 inch (0.483 mm) requirement.

AR. Examine the assembly for foreign objects, damage, and correct assembly.

AS. Install all the necessary protection covers.

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REVISION NO. 1 - June 12/12 Page 58

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
BLADE IDENTIFICATION

FIGURE 13

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REVISION NO. 1 - June 12/12 Page 59

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
SCHEMATIC FRONT VIEW OF 13TH STAGE BLADE AND LOCK INSTALLATION

FIGURE 14

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REVISION NO. 1 - June 12/12 Page 60

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
1. Type B Blades

2. Type C Blades

3. Ladder Seals

4. Type A Blades

5. Lock And Setscrew Assembly

KEY TO FIGURE 14

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REVISION NO. 1 - June 12/12 Page 61

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
SCHEMATIC FRONT VIEW OF 14TH STAGE BLADE AND LOCK INSTALLATION

FIGURE 15

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REVISION NO. 1 - June 12/12 Page 62

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
1. Ladder Seals

2. Type C Blades

3. Type B Blades

4. Type A Blades

5. Lock And Setscrew Assembly

KEY TO FIGURE 15

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PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 63

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
SCHEMATIC FRONT VIEW OF 15TH STAGE BLADE AND LOCK INSTALLATION

FIGURE 16

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December 2/11

PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 64

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
1. Ladder Seals

2. Type C Blades

3. Type B Blades

4. Type A Blades

5. Lock And Setscrew Assembly

KEY TO FIGURE 16

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PW4ENG 72-816

REVISION NO. 1 - June 12/12 Page 65

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
LADDER SEALS INSTALLATION

FIGURE 17

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REVISION NO. 1 - June 12/12 Page 66

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
BLADE AND LOCK INSTALLATION

FIGURE 18, SHEET 1

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REVISION NO. 1 - June 12/12 Page 67

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
BLADE AND LOCK INSTALLATION

FIGURE 18, SHEET 2

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REVISION NO. 1 - June 12/12 Page 68

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
BLADE AND LOCK INSTALLATION

FIGURE 18, SHEET 3

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REVISION NO. 1 - June 12/12 Page 69

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
GAP MEASUREMENT AND LADDER SEAL INSTALLATION

FIGURE 19

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REVISION NO. 1 - June 12/12 Page 70

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).