0 Pratt & Wbltaey E. A. No : 15MM008 

REV. LTR. A UnllldTtc:ho!Oic9M ~ ENGINEERING AUTHORIZATION l A 

East Hartford,CT 06118 1 I PAGE 

OF 114 

PROPOSED BY: Quinn, Joseph J 

PHONE: 860-258-9701 

MODBL (S): PW6000(SBRIBS) 

. SUBJECT. BORESCOPE INSPECT THE HPC STG 7 IBR AFT INTEGRAL ARM FOR CRACKS- SPLIT CASE METHOD 

APPLICABLE P/N(s }: 5495001,HPC Module 

ATA NUMBER(s} 72 - 00-00 

ACTION: ~his Engineering Authorization provides technical data to perform a ~orescope inspection of the HPC Stage 7 IBR Aft Integral Arm for cracks per the Pratt & Whitney approved procedure NDIP-1157 TECHNIQUE SHEET FOR BORESCOPE INSPECTION ON PW6000 7th STAGE IBR AFT INTEGRAL ARM INNER AND OUTER DIAMETER SURFACE FOR DEBRIS, PITTING, AND CRACKING - SPLIT CASE METHOD, in Appendix 1 and the procedure and limits contained herein. 

frhis EA supersedes EA 15MM008 in its entirety. 

pata contained herein has been evaluated technically by the Type ert ificate Holder and deter mined to be compliant with all applicable FAA Regulations, original type design and airworthiness standards. rrhe action contained herein will not affect the design intent of the subject parts within the HPC Assembly and airworthiness is not Fompromised. 

NOTE: FAA approval for this EA Is only conveyed by attachment of a FAA DER signed and numbered FAA form 81 10-3 marked "Approve" 

or approval letter from FAA Engineering. 

ENDORSEMENT 

Date 

DER 

~ : 03/2412015 

This document is the property of Uni1ed Technologies Corponltion (UTC). You may not possess, use, copy or disclose this document or any information in it. for any 

purpose, lnduding wi1hout limitation to design, manufacture, or repair parts. or to obtain FAA or other government approval to do so. without UTC'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's eXlii'8S$ written permlasion is not authorized and may result in aiminal and/or civilliabDitv. 

WARNING - This document contains technical data the export of which Is or may be restricted by the Export Administration Act and the Export Administration Regulations (EAR). 15 C.F.R. parts 730-774. Diversion contrary to U.S. law is prohlbitad. The export. re-export, transfer or ra-transter of this technical data to any other company, 

enli1y. person, or destination, or for any use or purpose other than that for which the technical data was originally provided by P&W. Is prohibited withou1 prior written approval from P&W and au1horization under apPicable export control laws. EAR Export ClassifiCation identified on the followina P&Qe(a). 

0812012 © United Technologies Corporation 2012- Unpublished Work- All Rights Reserved 
0 Pratt & Whitney 

E.A. No: 15MM008 

lA A United Toc:hnologles Company ENGINEERING AUTHORIZATION REV. LTR. 

East Hartford, CT 06118 l 2 114 PAGE 

OF 

1. PLANNING INFORMATION 

A. EFFECTIVITY 

(1) All engine serial numbers (ESN). 

2. BORESCOPE INSPECT THE HPC STG 7 IBR AFT INTEGRAL ARM FOR CRACKS WITH HPC UPPER 

CASE SPLIT 

B. PROCEDURE 

{1) Open the HPC Upper Split Case; reference EA 15MM007. 

(2) Borescope inspect the HPC 7th Stage IBR aft integral arm inner and outer diameter 

surface for debris, pitting and cracking per NDIP-1157, TECHNIQUE SHEET FOR 

BORESCOPE INSPECTION ON PW6000 7th STAGE IBR AFT INTEGRAL ARM INNER 

AND OUTER DIAMETER SURFACE FOR DEBRIS, PITTING AND CRACKING -SPLIT 

CASE METHOD, Reference (Appendix 1 ). 

Cracks are not acceptable. If any cracks are found, the engine must be removed from 

service immediately. · 

Any signs of debris or pitting are acceptable; engine can be returned to service with a 

repetitive inspection every 1 000 cycles. 

(3) Re-install HPC Split Case; reference EA 15MM007. 

C. POSTREQUISITES 

(1) None 

Pratt & Whitney Proprietary Information - ECCN 9E991. Use or disclosure of the data contained in this sheet is 

subject to the restrictions on the title page of this document. 

\ ' 
0 PraH & Whitney E.A. No: 15MM008 

lA A Unltod Teehnologloa Company ENGINEERING AUTHORIZATION REV. LTR. East Hartford, CT 06118 

I 3 PAGE 

OF 

Appendix 1: 

TECHNIQUE SHEET FOR BORESCOPE INSPECTION ON PW6000 7th STAGE ffiR AFT 

INTEGRAL ARM INNER AND OUITER DIAMETER SURFACE FOR DEBRIS, PmiNG, 

AND CRACKING - SPLIT CASE METHOD 

NDIP-1157 

Approved by: Jonathan Sullivan 0!12612015 

Signature: ftt: .Jt~U-~ 

WAIXIIIO 

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BE SU11J£CT 

ll'l A»U UO\ILAllCII:( (IT All) A.'IDOII TilE Ela'OaT ADWilllSTMTI()Iol UOVV.TIOX ~A v'JOV.TlOl< or '1HZ !TAll 011 !AI\ ~lAY TO A PeiAI.TYOFVPTO IO)'LU$ -="'WE)."f A.'IOA ~ OF I.OGII.-~'Dfll ~U.S <" l11101lS[(1'10~ " 100r mE arollT AI>NISilnA'IlOII ACTor 1m. n<Cl.vt>£ THIS "'OT)('! tmll A.';y l!.PlODUCm POilTlO~ OfTHn DOCIJ).!Co'T. 

IU!SniCTIOII 

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DOCtn.m.'T PWPnn'lUGHTS !'OTIC! 

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DISCLOS1JR! 

POSSESSION or THIS llOC\IIo4I!NT ALO!II. ~ Ah"Y SOUJ.CL COSSTITVT'!S SlXJII'D)CSSIQS. POUISSION. VSE. COPY1UOHT OJ. IIY ANYON! WlTitOI)l'Ult"'S UPRESS \\'J.m!SI'UloiiS~IOSil SOT AIJ'TIIORIUOAI';O MAY R!.Wl.l!XCilt\IIXAlA.'-'DOR ('1\'U. UA811JTY, 

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IJM c. -.c.town .Ct.bt d.c. ~'-"in 6n W... il '~ 10 ll. ""'tr"tiOD.,. &be rilk,... of dli' c~o.: • .,.m 

1 14 

Pratt & Whitney Proprietary lnfonnation - ECCN 9E991. Use or disclosure of the data contained in this sheet is 

subject to the restrictions on the title page of this document. 
0 E.A. No: 15MM008 

PraH & Whitney REV. LTR. l A A Unltod Todlnologlea Company ENGINEERING AUTHORIZATION 

East Hartford, CT 06118 

4 I PAGE 

O j 14 F 

1. Scope 

The pwpose of this inspection is to visually inspect for evidence of debris, pitting, and cracking on 

the PW6000 HPC 7th Stage ffiR in the aft integral arm area on both the inner diameter (ID) and 

outer diameter (OD) surface. A cross sectional view of the engine is shown in Figure 1.1 identifying 

the inspection area on the 7th stage ffiR. 

This inspection is accomplished by inserting a flexible articulating borescope thru the opening in the 

split case to view the OD surface of the 7th stage ffiR, or inserting the bore scope thru the split case 

and into the weep hole on the forward integral arm of the 71

h ffiR, and then passing between the 

LPT shaft and bore ID of the 7th ffiR to gain line of sight to the ID surface. 

FIGURE 1.1 

Cross section ofHPC position of 7th Stage ffiR relative to Stage 7 bore scope port 

Pratt & Whilney Propriclary Information - ECCN 9E991 

Use or d~clo~ure of lhe dala contained in lhis shccl ~ \ubjccl to the restriction on the title: pa~ of~ document 

Pratt & Whitney Proprietary Information - ECCN 9E991 . Use or disclosure of the data contained in this sheet is 

subject to the restrictions on the title page of this document. 
0 E.A. No: 15MMOOB 

PraH & Whitney 

l A A United Tochnologloa Company ENGINEERING AUTHORIZATION REV. LTR. 

East Hartford. CT 06118 

5 -t PAGE 

OF 

NOIP-1157 

Approximate path 

of borescope to ID 

Surface 

Approximate path 

ofborescope to 

OD surface 

1 14 

Inspection area 

of interest 

FIGURE 1.2 

Borescope paths to inspection location thru split case 

2. Equipment Required 

2. 1 PIN VSC-3-lOON 3.0mm diameter flexible borescope or equivalent- Figure 2.1 

2.2 PIN DPU 7-7070 video monitor - Figure 2.1 

2.3 Optional PIN VSC-2.4-lOON 2.4mm diameter flexible borescope 

Equipment Available from: 

Machida Borescopes 

40 Ramland Rd. 

Changeburg ~ 10962 

800-431-5420 

www.macbidaScope.coo: 

Pratt & Whitney Proprietary Information- ECCN 9E991 

Use or disclosure of the data contained in this sheet is subject to the restriction on the title page of this docmnent 

Pratt & Whitney Proprietary Information - ECCN 9E991. Use or disclosure of the data contained in this sheet is 

subject to the restrictions on the title page of this document. 
0 PraH & Whitney 

E.A. No: 15MM008 

A United Technologies Company ENGINEERING AUTHORIZATION REV. \A LTR. 

East Hartford, CT 06118 

6 I PAGE 

OF 1 14 

------- - - - - -------. NDIP-1157 

DPU 7-7070 

3.0mm borescope 

FIGURE 2.1 

Required inspection tooling 

3. Training 

Inspectors perfonning this inspection must be trained in the technique and capable of demonstrating 

proper placement of the borescope for inspection for a time of at least 4 hours. Inspectors should 

also be familiar with the typical borescope procedures of the PW6000 engine as called out in the 

Engine Manual and familiar with operation ofborescope tooling required for this inspection. 

4. Borescope Equipment Set-up 

NOTE: Prior to i~-pection, ensure that the borescope system is working correctly and 

produces a clear image. If necessary clean the lens and verify articulation of the borescope 

is working properly. If articulation does not work properly, damage to the scope or 

hardware may occur during inspection. 

5. Inspection Procedure - Outer Diameter Integral Arm Surface 

5.1 Verify split case procedure has been accomplished by maintenance personnel and that the OD 

surface of the 7th stage IBR aft integral ann is visible. Also verify crank pad cover bas been 

removed to allow engine rotation during OD inspection. Refer to cross section views in 

Figures 1.1 and 1.2, and surface view thru split case in Figure 5.1. 

Pratt & Whitney Proprietary Information - ECCN 9E991 

Use or disclosure of the data contained in this sheet is subject to the restriction on the title pa~ of this document 

Pratt & Whitney Proprietary Information - ECCN 9E991 . Use or disclosure of the data contained in this sheet is 

subject to the restrictions on the title page of this document. 
0 PraH & Whitney E.A. No: 15MM008 

lA A United Technologies Company ENGINEERING AUTHORIZATION REV. LTR. 

East Hartford, CT 06118 

7 I PAGE 

OF 114 

NDIP-1157 

FIGURE5.1 

View thhi split case of AFT Integral arm surface on 7th stage IDR. 

5.2 Gently insert the borescope thru the split case, between the variable vanes to the OD surface of 

the aft integral arm on the 7th IDR. Position the scope so that the inspector has a clear view of 

the OD surface. 

5.3 With the borescope in the proper position, rotate the engine at a constant speed and view the 

OD swface. The inspector should make note of any debris, pitting or cracking witnessed on the 

surface. If necessary, articulate the borescope to maintain proper view of the surface during 

engine rotation. 

5.4 Upon completion, remove borescope from the OD surface and split case. Document results of 

the inspection. 

Pratt & Whitney Proprietary lnfornllltion- ECCN 9E991 

Usc or disdosurc of the data c:ontainc:d in this sheet is subject to the ~tric:tioo on the tille page of tills document 

Pratt & Whitney Proprietary Information - ECCN 9E991. Use or disclosure of the data contained in this sheet is 

subject to the restrictions on the title page of this document. 
0 Pratt & Whitney E.A. No: 15MM008 

lA A United Technologloo Company ENGINEERING AUTHORIZATION REV. LTR. 

East Hartford, CT 06118 

8 I PAGE 

OF 1 14 

NDIP-1157 

6. Inspection Procedure-Inner·Diameter Intev,al Arm Surface 

6.1 Verify -split case procedure.has been accomplished by maintenance personnel and that the OD 

surface of the 7th stage.ffiR forward integqt{ ann is visible. Also verify ctank:.pad cover has 

beeo removed to allow engine rotation during ID inspection. Refer to cross section views in 

Figures 1.1 and 1.2, and surface view tbnf split case in Figure 6.1. 

6.2 Inspection of the ID swface will be conducted at the 3:00 and 9:00·positions by the inspector 

in order to cover the entire 360 degrees of the ID surface on the aft integral. arm. Order in 

which inspections is done is not important, as long as both sides are completed Clock position 

oonvention (3 :00 and 9:00 for this procedUre) will be oonsidered viewing the engine aft 

loo~ forward. 

FIGURE6.1 

View thru split case ofFORWARD Integral arm surface on 7th stage ffiR. 

6.3 With the inspector starting at the 3:00 position on the side of the engine, rotate the engine until 

the single oil weep hole on the integral arm surface is located. Once the oil weep hole is 

located, align the position of the hole as best as possible so that the hole is in straight 

alignment with the opening in the split case. Figures 6.2 and 6.3 shows the view of the weep 

hole. 

Use 01' disclosure of the data c:ontai.oc:d in this sheet is subje<:t to the restriction on the title page of this document 

Pratt & Whitney Proprietary Information - ECCN 9E991. Use or disclosure of the data contained in this sheet is 

subject to the restrictions on the title page of this document. 
0 PraH & Whitney E.A. No: 15MM008 

l A A Unl!ed Toc:hnologlea Company ENGINEERING AUTHORIZATION REV. LTR. 

East Hartford, CT 06118 

9 l PAGE 

OF 1 14 

NDIP-11 57 

FIGURE6.2 

View oflnteSraJ Ann and Weep hole 

FIGURE6.3 

Oil WeqJ Hole 

Pratt & Whitney Proprietary lnf011ll4tion- ECCN 9E991 

u~ or ~dosiii'C of the data contained in this ~bc:c: t i$ $Ubjc:c:t to the: restriction on the: title page: of this doc:uwc:ot 

Pratt & Whitney Proprietary lnfonnation - ECCN 9E991. Use or disclosure of the data contained in this sheet is 

subject to the restrictions on the title page of this document. 
0 Pratt & Whitney 

E.A. No: 15MM008 

'A A United Tecllnologles Company ENGINEERING AUTHORIZATION REV. LTR. 

East Hartford, CT 06118 

10 I 

PAGE 

OF 1 14 

NDIP-1157 

6.4 Push the borescope thru the weep hole and drop down to the LPT shaft. Position the 

borescope on top of the shaft and push the borescope aft to enter the cavity between the 

LPT shaft and 7th ffiR bore. Articulation and insertion of the borescope with the proper 

timing is required in order to get the borescope into position between the shaft and bore 

inner diameter. lbis may take the inspector several attempts for corre<Jt positioning. See 

Figure 6.4 below. 

6.5 Once the borescope is·positioned on the bore ID, push the borescope aft further until the 

aft face of the 7th stage bore is viewable. Articulate the scope to a complete 90 degree 

bend in order to view the ID surface of the integral ann. See Figure 6.5 for typical view 

of the bolts, nuts, and ID swface of the integral arm. 

7tbmRBore 

Opening to ID cavity 

LPT Shaft 

FIGURE6.4 

View ofLPT shaft and 7th ID bore 

Pratt & Whitney Proprietary Information - ECCN 9E991 

Use 01" disclo~urc: of the data contained in tbis sheet is subject to the RStriction on the title page of this document 

Pratt & Whitney Proprietary Information - ECCN 9E991. Use or disclosure of the data contained in this sheet is 

subject to the restrictions on the title page of this document. 
0 E.A. No: 15MM008 PraH & Whitney ' A 

A United Tocllnologles Company ENGINEERING AUTHORIZATION REV. LTR. 

East Hartford, CT 061 18 

11 l PAGE 

OF 

NDIP-1157 

FIGURE6.5 

View ofiD integral arm surface and silver plated nuts 

6.6 Once the 7tb stage ffiR intergral arm is in view, it will be necessary to push the 

borescope into contact with the ID surf~ and do a partia,l wrap clockwise and then 

counterclockwise to cover approximately 50% of the integral. ann circumference. Feed 

the borescope along the ID surface. as far as possible ib. each airection making note of 

debris, pits, or any visible cracks. Typical views of the surface conditions can be seen in 

Figures 6.6 thru 6.9. Make note of any debris, pitting, or crack-like indications during 

inspection. 

6.7 Upon completion, remove the borescope ~the ID integral arm cavity. Slowly 

remove the borescope in a controlled manner to not damage the optics. 

6.8 Once borescope is ·removed from the weep hole, it will be necessacy for the inspector to 

move to the 9:00 position on the engine. Rotate the engine slowly, at constant speed and 

position the weep hole at the 9:00 position on the side ofd1e engine thru the split case. 

This will allow for inspection of the 50% of the circumference not covered by the 3:00 

position inspection. FoUow inspection steps as called out in 6.3 thru 6.7. Again refer to 

Figures 6.6 thru 6.9 for surfac.e conditions. Again the inspector should make not of any 

indications witnessed during inspection. 

Pratt & Whitney Proprietary Information- ECCN 9£991 

114 

U5C or disdosw-c of the data contained in this sheet is subject to the KStriction on the title page of this document Pratt & Whitney 1-'ropnetary 1ntonnat1on- t:t;t;N 9t:991 . use or disclosure ot the data contamed 1n thiS sheet IS 

subject to the restrictions on the title page of this document. 
0 

E.A. No: 15MM008 

PraH & Whitney REV. LTR. 

A U n!te<l Technologies Company ENGINEERING AUTHORIZATION l A 

East Hartford, CT 06118 

12 I 

PAGE 

OF 1 14 

NDIP-1157 

FIGURE6.6 

Typical View of inspection surface with debris present 

FIGURE6.7 

Typical View of inspection surface 

Pratt & Whitoey Proprietary Wormation - ECCN 9E991 

Use w ~c:lowrc of the data contained in this sheet i) subject to the restriction on tllc title page of this docwns:nt 

Pratt & Whitney Proprietary Information - ECCN 9E991. Use or disclosure of the data contained in this sheet is 

subject to the restrictions on the title page of this document. 
0 E.A. No: 15MM008 

PraH & Whitney 

\A A United Technologies Company ENGINEERING AUTHORIZATION REV. LTR. East Hartford, CT 06118 

13 I 

PAGE 

OF 114 

NDIP-1157 

FIGURE6.8 

View of inspection surface from under nut 

Figure6.9 

View of inspection surface debris 

Pratt&: Whitney Proprietary Information- ECCN 9E991 

u~e or disclosure of the data contlli.ocd in this sheet is subject to tbe restriction on the title patte of thi~ document 

Pratt & Whitney Proprietary Information- ECCN 9E991 . Use or disclosure of the data contained in this sheet is subject to the restrictions on the title page of this document. 
0 PraH & Whitney 

E.A. No: 15MM008 

A United Technologies Company ENGINEERING AUTHORIZATION REV l A . LTR. 

East Hartford, CT06118 

14 l PAGE 

OF 1 14 

NDIP-1157 

7. Accept/Reject Criteria 

Refer to Applicable ACCEPT I REJECT conditions set in Service Bulletin for this inspection. 

8. Reporting 

Report the inspection results to local Pratt & Whitney Field Representative or Customer Support 

Representative. Su,bmit photos or videos of indications for review by appropriate P& W personnel. 

Pratt & Whitney Propricury Information - ECCN 9E99l 

Usc or disclosure of t.bc data contained io tim sbc:ct ~ ~ubjcct to the ~trictioo oo th~ tit!~ pa~ of this docU1UC1lt 

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