DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [4910-13-P]

[Docket No. FAA-2014-1130; Directorate Identifier 2015-NE-04- AD; Amendment 39-18250; AD 2015-17-17] RIN 2120-AA64 Ainvorthiness Directives; Pratt & Whitney Turbofan Engines AGENCY: Federal Aviation Administration (FAA) , DOT. ACTION: Final rule. SUMMARY: We ar e adopting a new airworthiness directive (AD) fo r a ll Pratt & Whitney (PW) PW4164-1D , PW4168-1D , PW4168A-1D and PW4170 engines, and certain PW 4164 , PW4168 , and PW4168A turbofan engines. This AD was prompted by fuel nozzle-to-fuel supply manifold interface fuel leaks. Thjs AD requires insp ectin g fue l nozzles for signs of leakage , replacing hardware as required , and torqueing to specified requirement. We are issuing this AD to prevent fuel leaks which could result in e ngine fire and damage to the airplane. DATES: This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. The Director of the Federal Register approved the incorporation by re ference of a certain publication listed in this AD as of [INSER T DATE 35 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]
. ADDRESSES: For s e rvic e infom1ation identified in this AD , contact Pratt & Whitney , 400 Main St. , East Hartford , CT 06108 ; phone: 860-565-8770; fax: 860-565-4503. You may view this service information at the FAA , Eng ine & Propeller Directorate, 12 New E ngland Executive Park , Burlington , MA. For information on the availability of thismater i al at the FAA , call 781-238-7125
. It i s also availab le on the I nt emet at http://www.reg ul at ions.gov by searchi n g fo r a n d locati ng Doc k et No. FAA

- 20 14

- 1 1 30
. Exa minin g th e AD Docket Yo u m ay exa mi ne the AD docket on the l ntemet at h ttp://www. regul a t ions.gov by
sea r c h i n g for an d l oca tin g D ocke t No. FAA

- 20 14

- 1130; or in person at the Docket Ma n ageme nt Fac ili ty between 9 a.m. and 5 p
. m . , Monday t h

rough Friday , e x cept Federa l hol idays
. The A D docke t con t ai n s t h is AD , the regu latory evaluation , any comments received , a n d o th e r informat ion. Th e address for the Docke t O ffice (phone : 800-647-5527) i s Doc um e nt Ma n ageme nt Fac ili ty , U.S
. D e partme nt ofTr ans p o rtation , Docke t Operati o n s , M-30, West B ui ld ing Ground F loor , Room W 1 2 -1 40 , 1200 New Jersey Aven u e SE
. , Wash ingto n , D C 20590
. 

### F OR F U RTHER INFORMATIO N CONT ACT: Kat he ry n Ma la te k , Ae rospace E n ginee r , E n g in e Ce r t i ficat io n Office , FAA , Eng ine & Prope ll e r D irectora te , 1 2 New E n gla nd Execu ti ve P ark , Bu rli ngton , MA 01803; pho n e: 78 1 -238-7 7 47; fax: 7 81 -238

- 7 1 99; e m a il : kathe ry n .mala tek @ faa.gov. 

### SU PP LE MENTARY INFORMATION : Di s cu s sion We i ss u ed a no t ice of proposed rulemak ing (N PRM) to ame n d 14 CF R part 39 by addi n g an A D t h at wo ul d app ly to a ll PW PW4164-l D , PW 4 168- 1 D , PW4168A

- 1D and PW4170 eng in es , a n d ce rtai n P W4 1 64 , P W4168 , and PW4168A t urbofan engines. The N P RM publis h ed in the F ede ral Reg i ste r on A pril2 1 , 2 0 15 ( 80 FR 22 140)
. The NPRM
was pro m pte d by repo rts of fo ur fu el n ozz le leak s in serv ice a nd an ad d it ional six fu el
nozz l e lea k s fou nd du rin g s h op vis its. T he root cause is inadeq uate to rque of the fuel
nozz le - to
- fue l su p ply m a ni fo ld B

- n u ts fo r the t emperat ures that th e fuel n ozzles expe r ie n ce . The N P RM p roposed to r equi re inspecti n g fue l nozz les for s i gns of leakage , repl a ci n g hardware as req u ired , and torq ue in g B- nu t s to spec i fie d requi r emen t. We a re 2issuing th i s AD to p revent fuel leaks w hich could result in eng in e tire and damage to the airplane. 

### Related Service Information under CFR part 51 We reviewed PW Ale rt Service Bulletin (ASB) No. PW 4G- 100 -A73-44 , Revision I , dated Feb ruar y 12, 2015
. This AS B describes procedur es for fuel s uppl y manifold inspection a ndre-to rqu e of the B-nut coru1ection. This service in format ion i s reasonably avai lable because the interested parties have access to it through the ir no rmal cou rse of business or by th e means id entified in the ADDRESSES section of th is A D. 

### Comments We gave the public the o ppor tunity to p artic ip ate in deve lop in g thi s AD. T he followi n g presents the comments received on th e NPRM (80 F R 22 140 , Ap ril 21, 20 15 ) and th e FAA ' s response to eac h comment. 

### Request to C h a n ge Referenced Service Information Korean Ai r req ueste d that thi s A D mandate follow in g PW ASB No. PW4G-100- A73-44 Rev ision 1 , dated February 12 , 2015 instead ofPW ASB No. PW 4G -100 -A73- 44 , dated October 10, 2014. Korean A i r wo uld like to r ece i ve credit for serv ice performed in accordance w ith th e lates t revision of the AS B. We agree . We changed th is AD to includ e PW ASB No. PW4G

- 100

- A73

- 4 4 R evision 1, dated February 12, 2015 and a dd ed a C redi t for Previous Action sec ti on to prov id e credit w h en PW AS B No. PW 4G- 100-A73-44 , dated October 10,2014 i s fo ll owed, before the effective date of thi s AD. 

### R eq uest to Add Service Information Korean Air requested that eng in es i ncorporat ing Special In struction (S I ) 129F

- 14
m eet th e requ iremen t for compliance with this AD since SI 129F- 14 prov i des the same in st ru ctio n s as PW ASB No. PW 4G-100- A73

- 44, dated O ctober 10 , 2014 and P W ASB No
. PW4G-100

- A73

- 44 Revis i on 1 , dat ed February 12 , 20 15. 

### 3We agree . We a dded S I l 29F -14 to t h e Credit for Previo u s Actio n section
. 

### R eq u est to C h a n ge Ma nd atory Termin a tin g Ac ti o n Korean A ir requested that the Mandatory T e rminating Action section be changed to state that th e actions listed are closing actions to the repetitive i nspections defined in the Comp li ance section. We agree. We changed the Mandato ry Te rm inati ng Action section by adding , "As tem1inati n g acti o n to the repetitive i nspection requirements i n paragrap h (e)( I ) of this AD do the fo ll owing: "
. 

### R eq u es t to Cha n ge Appli cab ili ty PW requested that engines incorporating PW Serv ice Bulletin (SB) No. PW4G1

00

- 72

- 220 , Revision 4, dated September 30 , 2011 be added to the App li cability section. We disag ree. Engines incorporating PW SB No. PW4G- 1 00-72-220 , Rev ision 4 , dated September 30 , 2011 are id e ntified in the Applicability section by mode l designation. We d id not change this AD. 

### R e qu est t o R edefi n e "Cy cl es" PW requested t hat the defin ition of cycles be changed from "cycles s ince new or cycles since the in co rporat ion ofPW SB No. PW4G

- 100

- 72

- 214 , dated December 1 5 , 201 1 o r SB No. PW4G-100-72-219 , Revision! , dated Octobe r 5 , 201 I " to " since new (1 st run) o r since last torque application to the B

- nuts on the fuel nozz le insta ll ation. " The justification for this request is that the B

- nuts cou l d have been torqued s ubsequent to the incorporation of the se rvice bulle tins. We agree. We changed t he Definition paragraph to define cycles as "
... since new
or cycles since last torque app li cati on to the B-nuts on the fuel nozz l e insta ll at i on. "

4

### Request to Change Compliance Time Asiana Airlines requested that the compliance time listed in this AD match the dates li sted in the ASB. Asiana believes the compliance t im e liste d in thj s AD i s more restrictive than the date s li s ted in the ASB. We d isagree. Us in g cycles since the effective date of this AD instead of calendar dates provides greater fleet mana ge ment flex i b ili ty to th e operator while acceptab ly resolving the unsafe condition. 

### Co nclu sio n We reviewed the r e l

evant data, considered the comments received , and determined that air safety and the pub li c interest require adopting this AD w i th th e
c hanges described previously. We also determined that these changes w ill no t increase th e economic burden on any operator or increase the scope of thjs AD
. 

### Cos t s of Com pliance We es timat e th at this AD would affect about 72 engines ins ta ll ed on airplanes of U.S. reg i stry
. The average labor rate is $85 per hour. We estimate that parts replacem ent
w ill cost about $1 , 356 per eng ine. Based on these figures, we estimate the cost of this A D
on U.S. operators to be $391 , 392. 

### Authority for this Rulem aki n g Title 49 of the United States Code spec ifies the FAA ' s authori ty to issu e rul es on
av iation safety
. Subti t l e I , sectio n 1 06 , describ es th e authority of the FAA Administrator. Subtitle 

### Vll : Aviation Programs , descri bes in more detail the scope of the Agency's authority. We are issuing thi s rulemaking under the authority described in S ubtitle VII, Part A , Subpart Ul , Section 44701: "Ge neral requirements." Under that section , Congress charges the FAA with promoting safe flight of civil a ircraft in a ir commerce by 

### 5prescribing regulations fo r practices , methods , and procedures the Admin i strato r finds necessary for safety in air commerce. This regulation is within the scope of that authority becau s e it addresses an unsafe cond i tion that is likely to exist or deve lop on product s identified in thi s rulemaking action. 

### R eg ulatory F inding s T hi s 

### AD will not have federa li sm implic ations under Executive Order 13132. This AD wi ll not have a substantial direct effect on th e States, on the relationship between th e
n at ional gove rnm e nt and the S tates, or on the distribution of power and responsibi li ties
amo n g the various l evels of govemment. For the reasons discussed above, I certify th at this AD: (I) Is not a "significa nt regulatory ac ti on " under Execut ive Order 12866 , (2) Is not a "significant rule " under DOT Regulatory Policies and Procedures (44 FR II 034 , February 26 , 1979) , (3) W ill not affect intrastate aviat ion in Alaska to the ex t ent tha t it justifie s making a regulatory distinction , and (4) Will not have a s ignificant economic impact , positive or negative, on a subs tantial number of small enti tie s und e r the crite ri a of the Regula to ry Flexibility Act. 

### List of S ubject s in 14 

### CFR Part 39 A ir transportation, Aircraft, Avia tion safety , I ncorporation by r efe re nc e, Safety. 

### Adoption of th e Amendment Accordingly , under the authority delegated to me by the Administrator, the FAA
ame n d s 14 CFR part 39 as follows: 

### PART 39 

### -A IRWORTHINESS DIRE CT IV ES I. The a uth ori ty citation for part 39 co ntin ues to read as follows: Autho ri ty: 49 U.S.C. 106(g) , 401 1 3,44701.



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### § 39.13 [Amen d e d) 2
. The FAA amends§ 39.13 by adding the fo ll owing ne w airworthiness directive (A D): 2015-17-17 Pratt & Whitne y: Ame ndmen t 39- 1 8250; Docket No. FAA

- 2014-1130; Directorate Identifi er 20 15-NE-04-AD. (a) Effective Date This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF PUBLICATION 

### IN THE FEDERAL REGISTER]. (b) Aff ected ADs None. (c) Applicability This AD app li es to all Pratt & Whitney (PW) PW4164 -1D , PW4168-ID , PW4168A-1D and PW4170 engines; and all PW4 1 64, PW4168 , and PW4168A turbofan
e ngin es that have i ncorporated either PW Service Bulletin (SB) No. PW4G-100-72-214 , dated D ecember 15 , 2011 orPW SB No. PW4G-100-72-219 , Revision 1 , dated October 5 , 2011. (d) Unsafe Condition This AD was prompted by fi1el nozzl e-to-f ue l supply manifold interface fue l leak s. We are iss ui ng thi s AD to prevent fue l leaks which could result in engine fire and damage to the a ir p l ane . (e) Compliance Comply with this AD within t h e comp li ance t im es specified , unless a lready done. (1) W ithin 800 flight hours after th e effec ti ve date of this AD, and within every 800 flight hours since last insp ect i on thereafte r, in spect all fuel no zz le-to -fu e l supp ly manifold interfaces for ev idenc e of fuel leaks, soot , and coke formation. Use the

7Acco m p li s hment Instruct io n s, Pa rt A , ofPW A le r t Se r v ice Bulle t in (AS B ) No. PW4G

100-A73-44, Revis i on l , dated Februa ry 12 , 2015 to do th e inspec t ions
. (2) Rep l ace hardware that fails an in spect io n . Use th e Accomp li shme n t Instructio n s , Pa r t A, ofPW ASB No. PW4G

- 100

- A73-44, Revis io n 1 , dated February 1 2, 2015 to do the rep laceme nt. (f) M a nd a tory Te rmin a tin g Act ion As te t minati ng acti o n to the r epet itive inspection requirements in paragrap h (e)( I ) of this A D do the fo ll owi n g: (1) Inspect all fue l nozz le - to-f ue l s upp ly man ifo l d i nterfaces for fuel leaks, soot,
a nd coke fonnation, rep l ace hardware that fail s i n spect ion , andre-torque all fuel nozzle

to-fuel s u pply manifo l d B

- nu t s as follows: (i) For eng i nes wi th fewer tha n 1 , 500 cycles o n the effective date of this A D , before accu mu l at ing another 650 cycles, not to exceed 1 , 900 cycles
. ( ii ) For e ng i nes w ith 1, 500 cycles or more , but less than 2 , 500 cycles on the effect ive date of th is AD, before accumulat ing anothe r 400 cyc les , not to exceed 2 ,700 cycles. (i i i) For engines with 2 , 500 cyc les or more on t he effective date of this A D , before accumu l ati ng another 200 cycles. (2) Use the Accomp l is h ment Tnstructions , Parts B through E, of P W ASB No
. PW4G-100-A73-44 , Rev ision 1 , dated February 1 2,2015 to do the i nspectio n , rep lacement , and retorque i ng. ( g ) Cre dit f or Previou s A ction Th i s paragraph prov ides c red it for the actions requi r ed by paragraphs (e) and (f) of this AD , if the actions were performed before the effective date of t hi s AD , us ing the p rocedures spec i fied in PW ASB No. PW40

- 1 00

- A73-44 , dated Octobe r I 0 , 20 14 or Special Ins tr uction 129F

- 14. 

### 8( h ) D efi nition For th e purpose of this A D "cy cle s" is defined as cycles s ince new or cycles since las t to rqu e applica tion to the B-nuts on the fu e l nozz le insta ll ation. (i) A lt e rnati ve Methods of Compliance (A MO Cs) The Manager , Engine Certification Office , FAA , may approve AMOCs for this !\D. Use the procedures found in 14 CFR 39.19 to make you r re qu es t. You may email your request to: ANE

- AD

-AMOC @ faa.gov. 

### U) Related T nformation Fo r more information about th is AD , contact K a th e ryn Malatek , Ae ro s pace Eng in ee r , E ngine Ce rtification O ffice, FAA, En g in e & Prop e ll er Directorate , 12 New E ngl a nd Exec utive P ark , Burlington , MA 01803; phone: 781- 23 8-7747 ; fax: 781-238- 7 199; e m a i l: katheryn.malatek @ faa.go v . (k) Material Incorporated by Ref e rence ( I ) The Director of the Federa l Re g is t e r a pproved the inco rporation b y refere nc e ( IBR) o f the se rvice inf ormation listed in this para g r a ph und e r 5 U .S.C. 552(a) and 1 CFR pa rt 51.(2) You must use this service inform ation as applicab l e to do th e ac t ions required by thi s AD, unless the AD specifies otherwise. ( i) PW ASB No. PW4G-100- A73 -4 4 , Revi s ion I , dated February 12 , 2015. ( ii ) Rese rved. (3) For PW se rv ice information identifi e d in this AD , contact Pratt & Whitne y, 400 Main St., East H artford , CT 06108; ph o ne: 860-565-8770 ; fax : 860-565-4503. (4) You m ay v iew this service inform at ion at th e FAA , Engin e & Prope ll er Dir ec torat e, 12 New Englan d Executi ve Park , Burlin g to n , MA. Fo r information on the
ava ilability ofthis material at the FAA , call 781- 23 8-71 25
.



### 9(5) You may view this se rvice inf ormation that is inco r porated by reference at the National Archive s and Records Admini s tration (NARA). For in format ion on the availability of thi s material at NARA , ca ll 202-74 1-6030 , or go to: http: //www.archives.gov / federal-register / cfr / ibr-location s. html
.
Issued in Burlin gto n , Massachusetts, o n August 1 8, 2015.

Diane S. Romano s ky , Acting Directorate Manager, En g in e 

### & Propeller Dir ecto rate , Ai rcraft Certificatio n Service.

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