# 0 Pratt & 

# Wbltaey E. A . N o : 15MM008 

### REV. LTR. l A A

UnllldTtc:ho!Oic9M

**~** 

## ENGINEERING AUTHORIZATION East Hartford,CT 06118 

# 1 

# I PAGE 

# 1 1 4 OF 

### PROPOSED B Y: Q uinn , Joseph J P

HONE : 860- 258-9701 MO DBL (S): PW6000(SBRIBS)



# . SUBJE CT . BOR E SCOP E IN SPECT T H E H PC STG 7 IBR AFT I NTEGRAL ARM FOR CRACKS- SP LIT CASE M ETHOD 

### 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, PITTI NG, AND CRACKING - SPLIT CASE METHOD, in Appendix 1 and the procedure and li mit s contai n ed herein. frhis EA 

### supersedes EA 15MM008 in its entirety. pata contained herein has been evaluated technically by the Type

**ert ificate**  

### Holder and deter m ined to be compliant with al l applicable FAA Regulations, original type design and airworthiness standards. rrhe action contained herein w ill not affect the design intent of the subject parts within the HPC Assembly and airworthiness is not Fompromised.
NOTE : FAA 

### approval f or th is EA Is 

### only conveyed by attachment of a FAA 

### DER sign ed and numbered FAA 

### form 81 10-3 

### marked "Approve" or appr oval l etter fro m FAA 

### E n

gin eering. E

N

DOR SEMENT DER



# ~ Date : 03/2412015 This document is the property of Uni1ed Technolog i es 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 expre ss written permission . Neither receipt nor possession of this document alone, from any source, constitutes such perm ission. Possession, use , copying or d isclosure by anyone without UTC's e Xlii'8S$ w ritten permlasion is not authorized and may result in aiminal and/or civilliabDitv. WA R NIN G - This document contains technical data the export of wh ich Is or may be restricted by the Export Administration Act and the Export Adm i n istration Regulations (EAR). 15 C . F.R. parts 730-774 . Diversion contrary to U.S. l aw is proh lbitad . The export. re-export, transfer or ra-transter of this technical data to any other company, e nli1y. person, or destination , or for any use or purpose otherthan that fo r 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 

### 20 1 2- 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 114 2 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 no t 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 inspect ion every 1000 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. N o: 1 5MM00 8 

# l A A Unltod Teehnologloa Company 

## ENGINEERING AUTHORIZATION REV. LTR. East Hartford, CT 06118 

# I 3 PAGE OF 

### Appendi x 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:

**.J t~U-**  **~** WAIXIIIO lH1$
**~"INA**Y COlo"TAil<

**llo"JOIUU<TJO.**
**~** $1J11Jf<:T TO Tltlllo'TUNATIONAI.

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**~lAY** BE SU11J£CT TO A PeiAI.TYOFVPTO IO)'LU$ -="'WE)."f A.'IOA

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**~AllY** DATA W1«H IS SUIIWJTTm 01
**~~** h'O OISCl.OWU OR USE OF ntiS llo'RliiMA TIOX 1'\ P!l\)IISDU 'IIIITMOUT

**~** 'II'IUTTDI

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**~UTAl lOS**  TO DUIUl'l. )IA.'-VFAC'TVU OltltDAIIl P.UTS.. OR 08TAil< FAA **OltomD.GO\~** API'IlO\'AI. TO DO SO. wmtOVTUTt"'S EXPUSS

**~ P!»IISS~**  ltliTI I'EllUcti'PT Joo'OJ. POSSESSION orTHIS llOC\IIo4I!NTALO!II.

**~** Ah"Y SOUJ.CL COSSTITVT'!S SlXJII'D)CSSIQS. POUISSION. VSE. COPY1UOHT OJ. DISCLOS1JR! IIY ANYON! WlTitOI)l'Ult"'S UPRESS **\\'J.m!SI'UloiiS~IOSil** SOT A IJ'TIIORIUOAI';O MAY R!.Wl.l!XCilt\IIXAlA.'-'DOR (' 1\'U. UA811JTY,

...... A 'G.'Io-.,. ....,.......,. """'-'*'- EC'OJ OtOOI IJM c. -.c.town .Ct.bt d.c.

**~'-"in** 6n W... il

**'~** 10 ll. ""'tr"tiOD.,. &be ril k,... ofdli'

**c~o.:**• .,.m 1 

## 14

Pratt & Whitney Propri etary 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. N o: 15MM008 

# PraH 

# & Whitney REV . LTR . 

# l A A Unltod Todlnologlea Company 

## ENGINEERING AUTHORIZATION East Hartford , CT 06118 

## 4 

# I PAGE 

## j 1 4 O F 

## 1 . Scope The pwpose ofthis inspection i s to visually inspect for evidence ofdebris, pitting, and cracking on the PW6000 HPC 7th 

### Stage ffiR in the aft integral arm area on both the inner diameter (ID) and outer diamet er (OD) surface. A cr oss sectional view ofthe engine is shown in Figu re 1.1 i dentifying the inspection area on the 7th 

### stage 

### ffiR. This inspection is accomplished b y inserting a fl exible articulating borescope t hru t he op ening in the split case 

### to view the OD surface of the 7th 

### stage ffiR, or inserting the b ore scope thru the split case and into the weep hole on the forward integral arm of the 7 1h 

### 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 s ection ofHPC position of7th 

### Stage ffiR relative to Stage 7 

### bore scope port
Pratt & Whilney Propriclary Information - ECCN 9E99 1 U s e or

**d~clo~ure** oflhe dala contained in lhis shccl

**~** \ubjccl to the restriction on 

### the title:

**pa~ of~**  document Pratt & Whitney Prop r ietary In formation - ECC N 9E991 . Use or disclosure of the data containe d in t h is sheet is subject to t he rest r ictions on the title page of this docume nt.

# 0 E .A. No : 15MMOOB 

# PraH &Whitney l A A United Tochnologloa Company 

## ENGINEERING AUTHORIZATION REV. LTR. East Hartford. CT 06118 

## 5 

# -t PAGE O F 

### NOIP-1157 

### Approximate path ofborescope to ID Surf ace Approximate path ofborescope to OD surface 1 

## 14

Inspection area ofinterest

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 flex i ble borescope Equipment Availa ble from : Machida Borescopes 40 Ramland Rd.

**Changeburg ~**  

### 10962 800-431-5420 www.macbidaScope. coo: Pratt & Whitney Proprietary Information- ECCN 9E991 Use or disclosure ofthe data contained in this sheet is subject to the res triction on the title page of this docmnent Pratt 

### & Whitney Proprietary Information - ECCN 9E991. U se or d isclosure of the data contained in this sheet is subject to the restri ct io n s on the title page of t hi s d ocument.

# 0 PraH & Whitney E.A . No : 15MM008 \A A United Technologies Company 

## ENGINEERING AUTHORIZATION REV. LTR. East Hartford, CT 06118 

# 6 

# I PAGE 1 

## 14 OF

------ - - - - - -------. 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 ofat 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. 

### Ifnecessary clean the lens and verify articulation of the borescope is working properly. 

### Ifarticulation does not work properly, damage to the scope or hardwar e 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 ofthe 7th s tage IBR 

### aft integral ann i s 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 ofthe data contained in this sheet is subject to the restriction on the title**pa~** ofthis document 

### Pratt 

### & Whitney Proprietary Information - ECCN 9E991 . Use or dis closu re of the data contained in this sheet is subject to the restri ctions 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 

# 114 OF 

### 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 ofany debris, pitting or cracking witnessed on the surface. 

### Ifnecessary, articul ate the borescope to maintain proper view ofthe surface during engine rotation. 5.4 

### Upon completion, remove borescope from the OD surface and split case. D ocument results of the 

### inspection . Pratt & Whitney Proprietary lnfornllltion- ECCN 9E991

Usc or disdos urc ofthe data c:ontainc:d in this sheet is subject to the

**~tric:tioo** on the tille page oftills document P ratt 

### & Wh itney Proprietary Information - ECCN 9E991. Use or disclosure of the data contained in this sheet is subject to t he restrict ions o n t h e tit le 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 

### 1 

## 14 OF


### 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 ofthe 

### 7th stage .ffiRforward 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 tbnfsplit case 

### in Figure 6.1. 6.2 

### Inspection of

### the ID swface 

### will be conducted atthe 3:00 and 9:00 · positions by the inspector 

### in order to cover the 

### entire 360 degrees ofthe 

### 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 ofthe 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 ofthe 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 ofthe weep hole. Use 01' disclosure ofthe 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 th is document.

# 0 PraH & Whitney E .A

. No : 15MM008 

## l A A Unl!ed Toc:hnologlea Company 

## ENGINEERING AUTHORIZATION REV . LTR. East Hartford, CT 06 118 

## 9 

# l P AGE 1 

## 14 OF
NDIP-11 5 7



### FIGURE6 .2 

### View oflnteSraJ Ann 

### and Weep hol e

FIGURE6.3 Oil WeqJ 

### H ole Pratt & Whitney Proprietary lnf011ll4tion- ECCN 9E991

**u~** or
**~dosiii'C** of the data contained in this

**~b c:c:**  **t** i$ $Ubjc:c:t to the: restriction on the: title page: of this doc:uwc:ot 

### Pratt 

### & Wh itney Proprietary l nfo nn at io n - ECCN 9E9 91 . U se o r d isclosure of the data conta i ned in th is sheet is subject to the restriction s on the title pag e of th is document.

# 0 Pratt & Whitney E .A . No: 15MM008 

# ' A A Uni ted Tecllnologles Company 

## ENGINEERING AUTHORIZATION REV . LTR. East Hartford, CT 06118 

## 10 

# I PAGE 1 

## 14 OF 

### NDIP-1157 

### 6.4 Push the borescope thru the weep hole and drop down to the LPT shaft. Position the b orescope on top ofthe shaft and push the borescope aft to enter the cavity between the LPT shaft and 7th 

### ffiR bore . Articulation and insertion ofthe 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 ofthe 7th 

### stage bore is viewable. Articulate the sco pe to a complete 90 degree bend 

## in orderto view the ID surface ofthe integra l ann. See Figure 6.5 for typical view ofthe bolts, nuts, and ID swface 

## ofthe 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:** ofthe data contained in tbis sheet is subject to the RStriction on the title page ofthis document Pratt 

### & Whitney Proprietary Information - ECCN 9E991. Use or disclosure of the data contained in this sheet is subject to the restrictions on the titl e page of this document.

# 0 E.A . No: 15MM008 

# PraH &

# Whitney

' A A United Tocllnologles Company 

## ENGINEERING AUTHORIZATION REV. LTR . East Hartford, CT 061 1 8 

## 1 1 

# 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%ofthe 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 ofthe 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 h ole at the 9: 00 position on the side ofd1e engine thru the split case. This will allow for inspection ofthe 50% ofthe 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 ofany indications witnessed during inspection . Pratt & Whitney Proprietary Information- ECCN 9£991 

## 114

U5C or disdos w-c ofthe data contained in this sheet is subject to the KStriction on the title page ofthis document Pratt & Whitney 1-'ropnetary 1ntonnat1on- t:t;t;N 9 t: 991 . use or disclosu r e ot the data contamed 1 n thiS sheet IS su b ject to the re strictions on the title p age of this document.

# 0 E.A . N o: 15MM008 

# PraH & 

# Whitney REV . LTR. l A A Un!te<l Technologies Company 

## ENGINEERING AUTHORIZATION East Hartford, CT 06118 

# 12 

# I PAGE 1 

# 14 OF 

### NDIP-1157

FIGURE6.6 

### Typical View ofinspection surface with debris present

FIGURE6.7 

### Typical View ofinspection surface Pratt & Whitoey Proprietary Wormation - ECCN 9E99 1 Use w

**~c:lowrc** of the data contained in this sheet i) subject to the restriction on tllc title page ofthis docwns:nt Pratt & Whitney Proprietary Inf ormation - ECCN 9E991. Use or disclosure of the data contained in this sheet is s ubject to the restrict ions on the title page of this document.

# 0 E.A . No : 15MM008 

# PraH &

# Whitney \ A A United Technologies Company 

## ENGINEERING AUTHORIZATION REV. L TR . East Hartford, CT 06118 

## 13 

# I PAGE 

## 114 OF NDIP-1157

FIGURE6.8 

### View ofinspection surface from under nut

Figure6.9 

### View ofinspection surface debris Pratt&: Whitney Proprietary Information - ECCN 9E991

**u~e** or disclo sure ofthe data contlli.ocd in this sheet is subject to tbe restriction on the ti tle patte of

**thi~** document 

### Pratt & Whitney Proprietary Information- ECCN 9E991 . Use or disclosure of the data contained in this sheet i s subject to the restrictions on the tit le page of this document.

# 0 PraH & 

# Whitney E .A . N o: 15MM008 

### l A A United Technologies Company 

## ENGINEERING AUTHORIZATION REV . L TR . East Hartford , CT06118 

# 14 

# l PAG E 1 

# 14 OF 

### NDIP-1157 7 . Ac c ept/Reject Criteria 

### Refer to Applicable ACCEPT 

### I REJECT conditions set in Service Bulletin for thi s inspection . 

## 8 . Reporting Report the inspection results to local Pratt & 

### Whitney Field Representative or Customer Support Representative . Su,bmit photos orv ideos ofindications for review by appropriate P& W personnel.

Pratt & Whitney Propricury Information - ECCN 9E99l Usc or disclosure o f t.bc data contained io tim s bc:ct

**~ ~ubjcct**  to the

**~trictioo** oo

**th~ tit!~**  **pa~** ofthis docU1UC1lt
Pratt 

### & Whitney Proprietary Information - ECCN 9E991. Use or disclosure of the data contained i n this sheet is subject to t h e restrictions on the title p age of this document.