# SER VICE BULLETIN REVISION NOTICE

ENGINE

— SEAL, 13TH, 14TH, AND 15TH ST AGE, HIGH PRESSURE COMPRESSOR (HPC)

— REPLACEMENT OF, AND INTRODUCTION OF A NEW SHOT PEEN SPECIFICA TION, TO IMPROVE REAR DRUM ROTOR DURABILITY Turbojet Engine Service Bulletin No. PW4ENG 72-816 Revision No. 1 dated June 12, 2012. Revision H istory Original Issue December 2, 201 1 Revision 1 dated June 12, 2012 Reason f or the Revision T o correct a shotpeen area in Figure 8 and Figure 10 from “shotpeen including break edge” to “no shotpeen including break edge”. T o correct a shotpeen dimension in Figure 9. T o add CIR information “Chapter/Section 72-35-08, Repair-04, -05, and -22” to the Added Data statement that lists repairs af fected by this Service Bulletin. T o add Notes in the Added Data. Ef fect of Revision on P rior Com pl ia n ce None. Th is is a Com pl ete Revision ( N ot Appl i ca bl e to the SG M L version ) The contents are in accordance with the list of ef fective pages. All pages have the current revision number

. T echnical changes are marked with black bars. M O D E L AP P L I CA T I O N 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) B U L L ET I N I SS U E S EQ U E N C E PW4000 Series 72-816

Page Revision N o

. 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 D istri bution Cod e 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).

# SER VICE BULLETIN

ENGINE

— SEAL, 13TH, 14TH, AND 15TH ST AGE, HIGH PRESSURE COMPRESSOR (HPC)

— REPLACEMENT OF, AND INTRODUCTION OF A NEW SHOT PEEN SPECIFICA TION, TO IMPROVE REAR DRUM ROTOR DURABILITY

M O D E L AP P L I CA T I O N 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)

B U L L ET I N I SS U E S EQ U E N C E PW4000 Series 72-816

A T A N U M B E R 72-35-00

UTC/P&W P RO P RI ET AR Y I N FO RMA T I O N This document is the property of United T echnologies Corporation

— Pratt & Whitney (UTC/P&W). Y ou 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 F AA 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). Com pl ia n ce Category 6 P&W D istri bution Cod e 2616, 2618, 2619


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 1 of 70 Published in United States of AmericaS u m ma ry 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

. Pla n n i ng I nf ormation Ef fectivity Data E ng i ne M od els Appl ica bl e 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*


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 2 UTC/P&W PROPRIET AR Y INFORMA TION 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

. N OTE : The engine serial number ef fectivity 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 F AA337 forms. T o 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 F AA337 forms to the Service Bulletin PW4ENG 72-816 Ef fectivity 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 suf fix 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. 

## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 3 UTC/P&W PROPRIET AR Y INFORMA TION 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. Con cu rre nt Req u i re me nts 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

. Descri ption Replace the 13th, 14th and 15th stage seals. Shot peen to the new specification. Com pl ia n ce Category 6 Do when the subassembly (e.g. modules, accessories, components, build groups) is disassembled suf ficiently 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 A viation Regulations and are F AA-Approved for the engine model(s) given. M a n power No more man-hours are necessary when done at complete disassembly/assembly

. We ig ht Data No Change. E l ectri cal Load Data Not Applicable. Sof twa re Accom pl ish me nt S u m ma ry Not Applicable. Refere n ces 1. Turbojet Engine Standard Practices Manual, Part No. 585005.


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 4 UTC/P&W PROPRIET AR Y INFORMA TION 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 T o 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 T o Create The (-1C) Engine Configuration. Issue Sequence 72-499, PW4000 Series. 1 1. Service Bulletin No. PW4ENG 72-504; Engine

— Conversion OF A PW4052, PW4056, PW4060, T o 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 T o 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 T o 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 T o 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 T o 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 T o 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) T o (-3A) For Installation In A Pre-Phase (-3) Nacelle. Issue Sequence 72-588, PW4000 Series.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 5 UTC/P&W PROPRIET AR Y INFORMA TION 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 T o 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 T o Provide Improved Platform Clearance And Blade Locking. Issue Sequence 72-565, PW4000 Series. N OTE : Reference 19 is shown to help find configurations in relation to this bulletin. N OTE : References 9 thru 18 are shown to help find non-production configurations that may incorporate this bulletin. Pu bl i cations Cha nged 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 I ntercha ngea b i l ity 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). I nf ormation i n the Appe nd ix Alternate Accomplishment Instructions (No) Progression Charts (Y es) Added Data (Y es) Revision to T able of Limits (No) Inspection Procedures (No)



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 6 UTC/P&W PROPRIET AR Y INFORMA TION 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).M aterial I nf ormation M aterial

— Cost a nd A va i la bi l ity 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. I nd ustry S u pport P rog ra m Not Applicable. The material d ata that f ol lows is f or each e ng i ne

. N OTE : 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 dif ferent 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 dif ferently

. CAUT I O N : THE FOLLOWING MA TERIAL DA T A T ABLE(S) ARE ORGANIZED BY ILLUSTRA TED P ARTS CA T ALOG. ALL P ARTS IN THE T ABLE(S) MA Y OR MA Y NOT BE APPLICABLE TO ALL THE ENGINE MODELS SHOWN IN THE T ABLE HEADING. YOU MUST REFER TO THE APPROPRIA TE ILLUSTRA TED P ARTS CA T ALOG FOR ENGINE MODEL APPLICABILITY USING THE OLD P ART NUMBER (PN) AND CA T ALOG SEQUENCE NUMBER. F AILURE TO INST ALL THE P ART(S) IN THE CORRECT ENGINE MODEL MA Y RESUL T IN A CONFIGURA TION THA T IS NOT F AA APPROVED. The material d ata that f ol lows is f or each e ng i ne

. For PW4052 , PW4056 , PW4060 , PW4060C E ng i nes : 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 d ata that f ol lows is f or each e ng i ne

. For PW4052 , PW4056 , PW4060 E ng i nes Converted T o P hase (

-3) Config u ration By Refere n ce 1 1 , Ser vice B u l leti n N o

. PW4 E N G 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)



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 7 UTC/P&W PROPRIET AR Y INFORMA TION 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 d ata that f ol lows is f or each e ng i ne

. For PW4052 (

-3) , PW4056 (

-3) , PW4060 (

-3) , PW4062 (

-3) , PW4062A(

-3) E ng i nes : 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 d ata that f ol lows is f or each e ng i ne

. For PW4 1 52 , PW4 1 56A, PW4 1 58 E ng i nes : 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)



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 8 UTC/P&W PROPRIET AR Y INFORMA TION 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 d ata that f ol lows is f or each e ng i ne

. For PW4 1 52 , PW4 1 56A, PW4 1 58 E ng i nes Converted T o P hase(

-3) Config u ration By Refere n ce 1 6 , Ser vice B u l leti n N o

. PW4 E N G 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 d ata that f ol lows is f or each e ng i ne

. For PW4 1 52 (

-3) , PW4 1 56A(

-3) , PW4 1 58(

-3) E ng i nes : 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 d ata that f ol lows is f or each e ng i ne

. For PW4460 , PW4462 E ng i nes : 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)



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 9 UTC/P&W PROPRIET AR Y INFORMA TION 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 d ata that f ol lows is f or each e ng i ne

. For PW4460 , PW4462 E ng i nes Converted T o P hase(

-3) Config u ration By Referen ce 9 , Ser vi ce B u l l eti n N o

. PW4 E N G 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 d ata that f ol lows is f or each e ng i ne

. For PW4460 (

-3) , PW4462 (

-3) E ng i nes : 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)

M od ifi cation a nd S pa res I nf ormation 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 A vailability (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. 

## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 10 UTC/P&W PROPRIET AR Y INFORMA TION 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 endor Services or Special Components/Materials Not Applicable. M aterial Data f or Each S pare E ng i ne The material for each spare engine is as stated in the preceding material information section. Re id e ntified Pa rts Not Applicable. N ecessa ry T ools No more Support Equipment is necessary

. Other M aterial I nf ormation Data Not Applicable.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 1 1 UTC/P&W PROPRIET AR Y INFORMA TION 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).Accom pl ish me nt I nstru ctions For PW4052 , PW4056 , PW4060 , PW4 1 52 , PW4 1 56A, PW4 1 58 , PW4460 , And PW4462 E ng i ne M od els 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 , PW4 1 52 , PW4 1 56A, PW4 1 58 , PW4460 , And PW4462 E ng i ne M od els That I n corporate Refere n ce 9 , Ser vi ce B u l l eti n N o

. PW4 E N G 72

-490 , Refere n ce 1 1 , Ser vi ce B u l l eti n N o

. PW4 E N G 72

-504 , O r Refere n ce 1 6 , Ser vi ce B u l l eti n N o

. PW4 E N G 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) , PW4 1 52 (

-3) , PW4 1 56A(

-3) , PW4 1 58(

-3) , PW4460 (

-3) , PW4462 (

-3) E ng i nes M od els 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.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 12 UTC/P&W PROPRIET AR Y INFORMA TION 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).LOCA TION OF THE 13TH ST AGE SEAL 72-35-00 FIGURE 1



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 13 UTC/P&W PROPRIET AR Y INFORMA TION 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).LOCA TION OF THE 14TH ST AGE SEAL 72-35-00 FIGURE 2, SHEET 1



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 14 UTC/P&W PROPRIET AR Y INFORMA TION 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).LOCA TION OF THE 14TH ST AGE SEAL 72-35-00 FIGURE 2, SHEET 2



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 15 UTC/P&W PROPRIET AR Y INFORMA TION 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).LOCA TION OF THE 15TH ST AGE SEAL 72-35-00 FIGURE 3, SHEET 1



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 16 UTC/P&W PROPRIET AR Y INFORMA TION 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).LOCA TION OF THE 15TH ST AGE SEAL 72-35-00 FIGURE 3, SHEET 2



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 17 UTC/P&W PROPRIET AR Y INFORMA TION 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).Appe nd ix Pa rts P rog ression to S how the Cha nged Pa rt i n Relation to Other Pa rts

13TH, 14TH AND 15TH ST AGE SEALS FOR PHASE(-1) ENGINES AND ENGINES CONVERTED TO PHASE(-3) CHART A

13TH, 14TH AND 15TH ST AGE SEALS FOR PHASE(-3) ENGINES CHART B Add ed Data I nternal Refere n ce I nf ormation
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. Appe nd ix N OTE : 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.


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 18 UTC/P&W PROPRIET AR Y INFORMA TION 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).Pa rt A: H PC Rea r D ru m Rotor Load i ng And Locki ng S lot

— N ew S hot Pee n S pecifi cations 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.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 19 UTC/P&W PROPRIET AR Y INFORMA TION 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 ST AGE LOAD AND LOCK SLOT LOCA TION FIGURE 4



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 20 UTC/P&W PROPRIET AR Y INFORMA TION 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 ST AGE LOAD AND LOCK SLOT LOCA TION FIGURE 5



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 21 UTC/P&W PROPRIET AR Y INFORMA TION 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 ST AGE LOAD AND LOCK SLOT LOCA TION FIGURE 6



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 22 UTC/P&W PROPRIET AR Y INFORMA TION 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 LOCA TIONS FIGURE 7

14TH AND 15TH ST AGE LOAD SLOT PEENING SPECIFICA TION FIGURE 8



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 23 UTC/P&W PROPRIET AR Y INFORMA TION 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 ST AGE LOAD SLOT PEENING SPECIFICA TION FIGURE 9

13TH ST AGE LOAD SLOT PEENING SPECIFICA TION FIGURE 10



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 24 UTC/P&W PROPRIET AR Y INFORMA TION 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 ST AGE LOCK SLOT PEENING SPECIFICA TION FIGURE 1 1



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 25 UTC/P&W PROPRIET AR Y INFORMA TION 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 ST AGE LOCK SLOT PEENING SPECIFICA TION FIGURE 12



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 26 UTC/P&W PROPRIET AR Y INFORMA TION 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).N OTE : 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.
Pa rt B : Asse m ble 1 3th Stage B lad es , Locks And Ladd er Seals By The P roced u re That Fol lows : 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. N OTE : 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. N OTE : There are three part numbers (sets) of blades provided for this stage. Set T ype A, contains most of the blades to be installed around the drum. Set T ype B, has notches in the right edge of blade platforms. Set T ype C, has notches in the left edge of blade platforms. When T ypes B and C blades are placed together, clearance is formed for a blade lock. Set T ype 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 T ypes 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 70-1 1-00. See Figure 14. CAUT I O N : WHEN YOU NEED TO MOVE AND SET THE BLADES IN THE ASSEMBL Y PROCEDURE WHICH FOLLOWS, USE THE PW A 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 T ype B and four T ype 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 T ype 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 T ype C against the last installed blades. (3) Install 35 T ype 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 T ype A wide platform (regular) blades against the locking blades. (2) Install 20 T ype A narrow platform (spacer) blades against the last installed blade. N OTE : 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. N OTE : 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.


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 27 UTC/P&W PROPRIET AR Y INFORMA TION 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 PW A 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 PW A 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. T ype A blade selection, Method A. (1) Calculate the number of T ype A narrow platform (spacer) blades you must replace with T ype 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 of f the number of blades "E" to the nearest whole number to get the number of T ype 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" = 0.01 1 inch Calculate the number of blades to replace "E" "E" = "D"/0.010 inch "E" = 0.01 1 inch/0.010 inch "E" = 1.1 Round to the nearest whole number to get the number of blades to add.


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 28 UTC/P&W PROPRIET AR Y INFORMA TION 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 T ype A wide platform (regular) blade L. T ype A blade selection, Method B. (1) Calculate the number of T ype A wide platform (regular) blades you must replace with T ype 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 of f the number of blades "E" to the nearest whole number to get the number of T ype 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 T ype 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. N OTE : Y ou can use T ape (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 suf fix, put the blades into a tray in the sequence shown in T able 15 if you will use 18 spacer blades, T able 16 if you will use 20 spacer blades, or T able 17 if you will use 22 spacer blades.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 29 UTC/P&W PROPRIET AR Y INFORMA TION 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 T ype A blades to get the correct blade clearance space, put the replacement blades in the correct position as follows: (1) Put the T ype A wide platform (regular) blades 180° apart and the T ype 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 T able 15. The mark should be on the convex side of the upper tip corner

. T a bl e 1 5 : B lad e Location/B lad e Pa rt N u m ber S uf fix BLADE LOCA TION NUMBERS IF YOU USE 18 SP ACER 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 1 1 -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 N OTE : The blade part number suf fixes in this table are based on T ype A (regular) blades that have wide platforms with Suf fix -01, T ype A (spacer) blades that have narrow platforms with Suf fix -04, T ype B blades with Suf fix -02, and T ype C blades with Suf fix -03. This chart does not show T ype A replaced blades, if any, that can be necessary to adjust the clearance between the blade platforms. See the text for replacement blade requirements. T a bl e 1 6 : B lad e Location/B lad e Pa rt N u m ber S uf fix BLADE LOCA TION NUMBERS IF YOU USE 20 SP ACER BLADES Column 1 Column 2 Column 3 Column 4 Column 5 Column 6 # Blade # Blade # Blade # Blade # Blade # Blade


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 30 UTC/P&W PROPRIET AR Y INFORMA TION 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 1 1 -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 N OTE : The blade part number suf fixes in this table are based on T ype A (regular) blades that have wide platforms with Suf fix-01, T ype A (spacer) blades that have narrow platforms with Suf fix -04, T ype B blades with Suf fix -02, and T ype C blades with Suf fix -03. This chart does not show T ype A replaced blades, if any, that can be necessary to adjust the clearance between the blade platforms. See the text for replacement blade requirements. T abl e 1 7 : B lad e Location/B lad e Pa rt N u m ber S uf fix BLADE LOCA TION NUMBERS IF YOU USE 22 SP ACER 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 1 1 -01 24 -01 37 -04 50 -01 63 -01 76 -04


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 31 UTC/P&W PROPRIET AR Y INFORMA TION 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 N OTE : The blade part number suf fixes in this table are based on T ype A (regular) blades that have wide platforms with Suf fix-01, T ype A (spacer) blades that have narrow platforms with Suf fix-04, T ype B blades with Suf fix-02, and T ype C blades with Suf fix-03. This chart does not show T ype 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. N OTE : 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). CAUT I O N : IN THE FOLLOWING STEPS HANDLE THE LADDER SEAL WITH CARE. DO NOT BEND OR FOLD THE SEAL SUCH THA T 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. N OTE : 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:



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 32 UTC/P&W PROPRIET AR Y INFORMA TION 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

. N OTE : 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. N OTE : 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. (1 1) 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.


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 33 UTC/P&W PROPRIET AR Y INFORMA TION 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 T ape, 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) T orque the setscrew to the running torque plus 4

– 8 lb-in (0.452

– 0.904 N.m). Use a PW A 83135 Driver and PW A 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 PW A 78064 Gage. Lock shank must be flush to 0.035 inch (0.889 mm) below blade platform.


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 34 UTC/P&W PROPRIET AR Y INFORMA TION 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. N OTE : Y ou 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. Pa rt C : Asse m bl e 1 4th Stage B lad es , Locks And Ladd er Seals By The P roced u re That Fol lows : 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. N OTE : 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. N OTE : There are three part numbers (sets) of blades provided for this stage. Set T ype A, contains most of the blades to be installed around the drum. Set T ype B, has notches in the right edge of blade platforms. Set T ype C, has notches in the left edge of blade platforms. When T ypes B and C blades are placed together, clearance is formed for a blade lock. Set T ype 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 T ypes 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 70-1 1-00. See Figure 15. CAUT I O N : WHEN YOU NEED TO MOVE AND SET THE BLADES IN THE ASSEMBL Y PROCEDURE WHICH FOLLOWS, USE THE PW A 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 T ype B and eight T ype C blades and move them to one side. See Figure 13. C. Separate the T ype A blades that have a part number with a -04 suf fix. 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.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 35 UTC/P&W PROPRIET AR Y INFORMA TION 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 PW A 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 T ype B blade next to the lock. (2) Install one T ype C blade next to the locking blade. (3) Install one lock and set screw assembly next to the locking blade. (4) Install one T ype B blade next to the lock. (5) Install one T ype C blade next to the locking blade. (6) Install one lock and set screw assembly next to the locking blade. (7) Install one T ype 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 T ype A wide platform (regular) blades. (2) Install two T ype A narrow platform (spacer) blades. (3) Install one T ype C locking blade. (4) Install one lock and setscrew assembly

. (5) Install one T ype B locking blade next to the lock. N OTE : 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 T ype C locking blade next to the lock that was installed before. (2) Install one T ype B locking blade next to the locking blade. (3) Install one lock and setscrew assembly next to the locking blade. (4) Install one T ype C locking blade next to the lock. (5) Install one T ype B locking blade next to the locking blade. (6) Install one lock and setscrew assembly next to the locking blade. (7) Install one T ype C locking blade next to the lock. (8) Install one T ype B locking blade next to the locking blade. (9) Install one lock and setscrew assembly next to the locking blade. (10) Install one T ype 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 T ype A wide platform (regular) blades. 

## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 36 UTC/P&W PROPRIET AR Y INFORMA TION 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 T ype A narrow platform (spacer) blades. (3) Install one T ype B locking blade. (4) Install one lock and setscrew assembly next to the locking blade. (5) Install one T ype C locking blade next to the lock. N OTE : A total of 74 blades and eight locks are installed at this time. T wo T ype 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: N OTE : This space will be measured and used to calculate the initial clearance between the blades. (1) Use a PW A 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 PW A 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: N OTE : This space will be measured and used to calculate the initial clearance between the blades.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 37 UTC/P&W PROPRIET AR Y INFORMA TION 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 PW A 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 PW A 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 T ype 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 T ype A Blade Selection Method B. X. T ype A Blade Selection, Method A. (1) Calculate the number of T ype A wide platform (regular) blades you must replace with T ype 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 of f the number of blades "E" to the nearest whole number to get the number of T ype 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 

## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 38 UTC/P&W PROPRIET AR Y INFORMA TION 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 T ype A narrow platform (spacer) blades Y

. T ype A blade selection, Method B. (1) Calculate the number of T ype A narrow platform (spacer) blades you must replace with T ype 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 of f the number of blades "E" to the nearest whole number to get the number of T ype 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 T ype A wide platform (regular) blades Z. At the two loading slots, loosen the four set screws in the blade locks that were installed before. N OTE : Y ou can use T ape (P05-341) or equivalent so that the blades will not fall out as they pass the loading slots. AA. Install the remaining T ype 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.


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 39 UTC/P&W PROPRIET AR Y INFORMA TION 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. N OTE : 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. N OTE : 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 T ype A blade platforms is 0.030

– 0.050 inch (0.76

– 1.27 mm). N OTE : 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) Y ou 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. CAUT I O N : DO NOT MIX THE BLADES FROM THE "X" SIDE OF THE DRUM WITH BLADES FROM THE "Y" SIDE OF THE DRUM OR INCORRECT BLADES PLA TFORM SP ACES 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 suf fix. Remove the blades from the "Y" side of the drum and put them in tray locations 39 thru 76 based on part number suf fix. See T able 18. If you replaced T ype A wide platform (regular) and narrow platform (spacer) blades to get the correct blade clearance space, use T able 18 to put the replacement blades in the correct position as follows: (1) Equally space the T ype A wide platform (regular) and narrow platform (spacer) blades around the disk as best possible. (2) Put the T ype A wide platform (regular) blades 180° apart and the T ype 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

.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 40 UTC/P&W PROPRIET AR Y INFORMA TION 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).T abl e 1 8 : B lad e Location/B lad e Pa rt N u m ber S uf fix BLADE LOCA TION NUMBERS IF YOU USE 22 SP ACER 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 1 1 -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 N OTE : The blade part number suf fixes in this table are based on T ype A blades that have wide platforms with suf fix -01, and narrow platforms with Suf fix -04, T ype B blades with Suf fix -07, and T ype C blades with Suf fix -06. This table does not show T ype 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. N OTE : 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


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 41 UTC/P&W PROPRIET AR Y INFORMA TION 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). CAUT I O N : 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. N OTE : 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. N OTE : 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. N OTE : 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. N OTE : 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.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 42 UTC/P&W PROPRIET AR Y INFORMA TION 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. (1 1) 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.


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 43 UTC/P&W PROPRIET AR Y INFORMA TION 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).



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 44 UTC/P&W PROPRIET AR Y INFORMA TION 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).



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 45 UTC/P&W PROPRIET AR Y INFORMA TION 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) T orque the setscrew to the running torque plus 4

– 8 lb-in (0.452

– 0.904 N.m). Use a PW A 83135, Driver and PW A 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 PW A 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. N OTE : Y ou 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.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 46 UTC/P&W PROPRIET AR Y INFORMA TION 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).Pa rt D : Asse m bl e 1 5th Stage B lad es , Locks And Ladd er Seals By The P roced u re That Fol lows : 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. N OTE : 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. N OTE : There are three part numbers (sets) of blades provided for this stage. Set T ype A, contains most of the blades to be installed around the drum. Set T ype B, has notches in the right edge of blade platforms. Set T ype C, has notches in the left edge of blade platforms. When T ypes B and C blades are placed together, clearance is formed for a blade lock. Set T ype 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 T ypes 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 70-1 1-00. See Figure 16. CAUT I O N : WHEN YOU NEED TO MOVE AND SET THE BLADES IN THE ASSEMBL Y PROCEDURE WHICH FOLLOWS, USE THE PW A 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 T ype B and eight T ype C blades and move them to one side. See Figure 13. C. Separate the T ype A blades that have a part number with a -04 suf fix. 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 PW A 83135, Driver and PW A 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 T ype B blade next to the lock. (2) Install one T ype C blade next to the locking blade. (3) Install one lock and set screw assembly next to the locking blade. (4) Install one T ype B blade next to the lock. (5) Install one T ype C blade next to the locking blade. (6) Install one lock and set screw assembly next to the locking blade. (7) Install one T ype 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 T ype A wide platform (regular) blades. 

## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 47 UTC/P&W PROPRIET AR Y INFORMA TION 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 T ype A narrow platform (spacer) blades. (3) Install one T ype C locking blade. (4) Install one lock and setscrew assembly

. (5) Install one T ype B locking blade next to the lock. N OTE : 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 T ype C locking blade next to the lock that was installed before. (2) Install one T ype B locking blade next to the locking blade. (3) Install one lock and setscrew assembly

. (4) Install one T ype C locking blade next to the lock. (5) Install one T ype B locking blade next to the locking blade. (6) Install one lock and setscrew assembly

. (7) Install one T ype C locking blade next to the lock. (8) Install one T ype B locking blade next to the locking blade. (9) Install one lock and setscrew assembly

. (10) Install one T ype 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 T ype A wide platform (regular) blades. (2) Install six T ype A narrow platform (spacer) blades. (3) Install one T ype B locking blade. (4) Install one lock and setscrew assembly

. (5) Install one T ype C locking blade. N OTE : A total of 68 blades and eight locks are installed at this time. T wo T ype 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 PW A 85595, Spreader, with grooves in the jaws against the blade platforms, to apply a tangential force to the blades. 

## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 48 UTC/P&W PROPRIET AR Y INFORMA TION 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 PW A 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: N OTE : This space will be measured and used to calculate the initial clearance between the blades. (1) Use a PW A 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 PW A 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. 

## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 49 UTC/P&W PROPRIET AR Y INFORMA TION 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 T ype A blade replacement selection Method A. W

. If the Initial Clearance "C" is more than 0.080 inch (2.032 mm), go to T ype A blade replacement selection Method B. X. T ype A Blade Selection, Method A. (1) Calculate the number of T ype A wide platform (regular) blades you must replace with T ype 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 of f the number of blades "E" to the nearest whole number to get the number of T ype 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 T ype A narrow platform (spacer) blades Y

. T ype A Blade Selection, Method B. (1) Calculate the number of T ype A narrow platform (spacer) blades you must replace with T ype 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 of f the number of blades E to the nearest whole number to get the number of T ype A wide platform (regular) blades required. Remove one narrow platform (spacer) blade for each wide platform (regular) blade that you must add. Example 2: 

## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 50 UTC/P&W PROPRIET AR Y INFORMA TION 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" = 0.01 1 inch Calculate the number of blades to replace "E". "E" = "D"/0.010 inch. "E" = 0.01 1 inch/0.010 inch. "E" = 1.1 Round "E" to the nearest whole number to determine the number of blades to replace. "E" = 1 T ype A wide platform (regular) blade Z. At the two loading slots, loosen the four set screws in the blade locks that were installed before. N OTE : Y ou can use T ape, P05-341 or equivalent at the opposite loading slot so that the blades will not fall out. AA. Install the remaining T ype 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. N OTE : 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. N OTE : 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. N OTE : 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 T ype 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. N OTE : Y ou 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).



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 51 UTC/P&W PROPRIET AR Y INFORMA TION 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. N OTE : Y ou 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. CAUT I O N : DO NOT MIX THE BLADES FROM THE "X" SIDE OF THE DRUM WITH BLADES FROM THE "Y" SIDE OF THE DRUM OR INCORRECT BLADE PLA TFORM SP ACES 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 suf fix. Remove the blades from the "Y" side of the drum and put them in tray locations 36 through 70 based on part number suf fix. See T able 19. If you replaced T ype A wide platform (regular) and narrow platform (spacer) blades to get the correct blade clearance space, use T able 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 T ype A wide platform (regular) blades 180° apart and the T ype 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

. T a bl e 1 9 : B lad e Location/B lad e Pa rt N u m ber S uf fix 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 1 1 -01 24 -04 37 -01 50 -01 63 -01



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 52 UTC/P&W PROPRIET AR Y INFORMA TION 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 N OTE : The blade part number suf fixes in this table are based on T ype A blades that have wide platforms with Suf fix -01 and narrow platforms with Suf fix -04, T ype B blades with Suf fix -07, and T ype C blades with Suf fix -06. This table does not show T ype 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. N OTE : 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). CAUT I O N : 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. N OTE : 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. N OTE : A rung of the seal must be over the loading slot.


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 53 UTC/P&W PROPRIET AR Y INFORMA TION 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. N OTE : 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. N OTE : 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. (1 1) 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:



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 54 UTC/P&W PROPRIET AR Y INFORMA TION 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.


## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 55 UTC/P&W PROPRIET AR Y INFORMA TION 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.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 56 UTC/P&W PROPRIET AR Y INFORMA TION 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) T orque the setscrew to the running torque plus 4

– 8 lb-in (0.452

– 0.904 N.m). Use a PW A 83135 Driver, and PW A 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:



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 57 UTC/P&W PROPRIET AR Y INFORMA TION 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 PW A 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. N OTE : Y ou 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.



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 58 UTC/P&W PROPRIET AR Y INFORMA TION 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 IDENTIFICA TION FIGURE 13



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 59 UTC/P&W PROPRIET AR Y INFORMA TION 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).SCHEMA TIC FRONT VIEW OF 13TH ST AGE BLADE AND LOCK INST ALLA TION FIGURE 14



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 60 UTC/P&W PROPRIET AR Y INFORMA TION 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. T ype B Blades 2. T ype C Blades 3. Ladder Seals 4. T ype A Blades 5. Lock And Setscrew Assembly KEY TO FIGURE 14



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 61 UTC/P&W PROPRIET AR Y INFORMA TION 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).SCHEMA TIC FRONT VIEW OF 14TH ST AGE BLADE AND LOCK INST ALLA TION FIGURE 15



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 62 UTC/P&W PROPRIET AR Y INFORMA TION 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. T ype C Blades 3. T ype B Blades 4. T ype A Blades 5. Lock And Setscrew Assembly KEY TO FIGURE 15



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 63 UTC/P&W PROPRIET AR Y INFORMA TION 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).SCHEMA TIC FRONT VIEW OF 15TH ST AGE BLADE AND LOCK INST ALLA TION FIGURE 16



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 64 UTC/P&W PROPRIET AR Y INFORMA TION 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. T ype C Blades 3. T ype B Blades 4. T ype A Blades 5. Lock And Setscrew Assembly KEY TO FIGURE 16



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 65 UTC/P&W PROPRIET AR Y INFORMA TION 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 INST ALLA TION FIGURE 17



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 66 UTC/P&W PROPRIET AR Y INFORMA TION 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 INST ALLA TION FIGURE 18, SHEET 1



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 67 UTC/P&W PROPRIET AR Y INFORMA TION 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 INST ALLA TION FIGURE 18, SHEET 2



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 68 UTC/P&W PROPRIET AR Y INFORMA TION 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 INST ALLA TION FIGURE 18, SHEET 3



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 69 UTC/P&W PROPRIET AR Y INFORMA TION 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 INST ALLA TION FIGURE 19



## l December 2/1 1 

# PW4ENG 72-816 REVISION NO. 1

- June 12/12 Page 70 UTC/P&W PROPRIET AR Y INFORMA TION 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).