### DEPART MEN T OF TRANSPORTATION Federal Av iation Administration 14 CFR Part 39 [4910-13-P]

[Docket No. FAA-2014-0363; Directorate Identifier 2014-NE-08-AD ; Amendment 39-18252 ; AD 2015-17-19] RIN 2120-AA64 Ainvorthiness Directives ; Rolls-Royce pic Turbofan Engines AGENCY: Feder a l Av iation Adm in istratio n (FAA) , DOT. ACTION: Fi na l ru le. SUM MARY: We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) RB21l Trent 768-60 , 772-60 , an d 772B-60 t urb ofan eng in es. Thi s AD was p r

ompted by fue l leaks caused by damage to th e fan case low-pressure (LP) fuel tube. Thi s AD r eq uires inspection of the fan case LP f uel tubes and associated cl ips and the fue l o il h eat exchanger (FOHE) mounts and assoc iated hardwa r e . We are i ss ui ng this AD to p r eve n t failure of the fan case LP fuel tube , w hi ch could lead to an in-flight eng in e shutdown , loss of tlu- u st co ntro l , and damage to the a irp lane. DAT ES: This AD i s e f fective [ INSERT DATE 35 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. The Director of the Federal Register approved the in co rp o ration by reference of certain publications listed in this AD as of [INSERT DATE 35 D AYS AFTER DATE OF PUBLICATION IN THE FEDERAL REG ISTE R]. ADDRESSES : For service inf ormation id entified in this AD , contact Rolls-Royce pic, Corporate Communica t ions , P.O. Box 31 , Derby , Eng land , DE248BJ; ph one: 0 11 -44- 1332-242424; fax: 0 11 -44

- 1 332

- 249936; email: http: / /\\'WW.rolls

royce.com/contac t / civ il

_ team.jsp; W e b site: https ://www.aero manage r.c om. You may
v iew this se rv ice i nformat io n at the FAA , Eng in e & 

### Propeller Directorate, 12 NewEngland Exec uti ve Park , Burlington , M A. F o r information on the ava ilability of this material at the PAA , ca ll 78 1 -238-7125

. It is a lso avail ab le on the Inte rnet at http: //www.rcg u lations.gov by searching for and locating Docke t No. 

# rAA-20 14-0363. 

### E x aminin g th e A D D o ck e t You may exa min e the AD docket on the Interne t at http: //www.regulat ions . gov by searching for a nd l oca ting Docket No. FAA-2 0 14-0363; or in p e rso n a t th e Docket Manage ment facility between 9 a . m. and 5 p.m. , Monday throu g h F riday , except Federal holidays. The AD docket contain s thi s AD, the r eg u latory ev aluation , a n y comments received , and othe r information

. T he address f o r the D ocket Otlice ( ph one: 800-647-5527) is Document Manageme n t Faci li ty, U .S. D e p artmen t of Tran spo rtation , Docket Operation s, M-30, Wes t Buildin g G ro und Floor, Room W 12 -140 , 1200 New Jersey A venue SE., Was h ington, DC 20590. 

### FOR F U RT HE R IN FORMATIO N C ONTA C T: Wego Wang , Aerospace Eng i ne e r , Engine Certification Office , FAA, Engine 

### & Pro pell er Directorate , 12 New England Executive Park , Burlington , MA 01803; phone : 781-238-7134; fax: 78 1

- 238 -7 1 99; e mail:
we go. wang @ faa.gov. 

### SU PPL E M ENTARY INF ORMA T I ON: Di s cu ss ion We i ssued a s upplemental noti ce o f proposed rul e makin g (SNP RM) to amend 14 C FR part 39 by addi n g an AD that wou ld apply to a ll RR RB211 Tren t 768-60, 772-60 , and 772B-60 turb ofa n e n g ines. The SNPRM published in the Federal Reg is t e r on April 21,2015 (80 FR 22 137). We preced e d th e SN PRM wit h a notic e of proposed rulemakin g (N P RM) that publi s he d in the Federal Reg is te r on Ju ly 3 , 2014 (79 FR 37965). T he NPRM proposed to re quire inspection o f th e f a n case LP fuel tubes a nd associated clips
a nd the F OHE m o unt s a nd associated h a rd wa r e. The N PRM was prompted by fue l leaks caused by damage to th e fan case LP fu e l tube. We are iss uin g thi s A D to pr event failure 2of the fan case LP fuel tube , which cou ld lead to an in-flight e ng in e s hutdo w n , loss of thrust control , and damage to the a irplan e. R e late d Service Inf o rmation under 1 CF R Part 51 We reviewed RR Alert No n-M odifica ti o n Serv ice Bull e tin (N M S B ) No

. RB.211

- 73-A H5 22 , Revision 2 , dated Jul y 18 , 20 14 ; and RR Alert N M SB No. RB. 21 1-73- AH837 , dated Septe mber 9 , 2014. This se r vice infonnation de sc ribe s procedures for inspecting , and re p l ac ing if required , th e fan case LP fuel tube and c li p s and the FO l-I E mounts and hardwa re . Th is se rvic e inform ati o n i s reasonab ly ava il ab le b ec ause the interested parties have access to it throug h their nor mal course of business o r see ADDRE SSES f or other ways to access thi s service inform ation

. Com m e nt s W e gave the public the opportunity to participate in dev e lopin g this AD

. W e received no comments on the SNPRM (8 0 FR 22 1 37 , April21 , 2015). Co nclu s i o n We re viewe d the relevant data and determined that air safe ty and the public interest require adoptin g tlus A D as proposed. C o sts of Co mpli a n ce We es t ima t e that t hi s AD affec ts abou t 50 e ngines insta ll ed o n a irplan es of U .S. registry. W e a l so est imat e that it wi ll take abo ut 6 hours per e ng in e t o comply w ith this A D. Th e ave rage labor rate is $85 per hour. We also estimate that 25 of the e ngin es w ill fa il the in spec ti on required by thi s AD. Required p arts co s t about $4 , 03 1 per e ngine. Based on the se fi g ures , we es timate the cos t o f thi s AD on U.S. operators to b e $126,275. Authority for thi s Rul e m a kin g Title 49 o f the U nited States Code spec ifi es the FAA's a uth o rity to iss ue rul es o n aviation saf ety. Subtitl e I , secti on 106 , de s c rib es the authority oflhe FAA A dmini s trator.



### 3Subtitle 

### Vll: Aviation Program s, d escribes in m o re detail the scope of th e Agenc y's authori ty
. W e a r e iss uin g thi s rulemaking und e r the authority de sc rib ed in Subtitle 

### Vll , Part A , S ub part lll , Sect io n 

### 44701: " Ge nera l r eq uire m e nts . " Under that sec tion , Congress
c h arges the 

### fAA wi th promoting safe flight of civil airc raft in ai r co mm erce by prescribing reg ul a ti ons for practic es , m e th ods, a nd procedures the Admi ni s trator finds
n ecessa ry f o r saf e ty in air commerc e. Thi s regula t ion is with in the sc op e of that au th ority becau se it addresses an un safe condition th at is likely to exist or dev e lo p on product s identified in this rul e m aki ng action. 

### Regu l atory Findings Thi s AD w ill not hav e federalism im plication s und er Exec u ti ve Order 

### 13132. This AD will not hav e a s ub stantial direct ef f ect o n the States , on th e re lation s hip between th e national gove rnm e n t and the States, o r o n the distribution of pow e r a nd respo nsibilitie s
amon g th e va ri ou s leve l s of government. For th e reasons d isc u ssed above , I ce rtify that this AD: (1) I s not a " s ig nificant regulatory ac ti on " und e r Exec uti ve O rd er 

### 12866, (2) I s not a " s ig nificant rule " under DOT R eg ulatory Poli c i es a nd Procedures 

### (44 FR 

### 110 34 , February 

### 26, 1979) , (3) Will not affect intrastate av iat io n in Alaska to th e exte nt that it ju s tifies making a regulatory disti nction , and (4) Will not h ave a sig nific ant econom ic impact , positive or n egati ve , on a
s ubstantial numb e r of s mall entities und e r th e c ri te ria of the Re g ul atory F lexibility Act. 

### List of Subjects in 14 CFR Part 39 Air tr anspo rtation , Aircraft , Av i ati o n safe ty , Incorp o ra tio n by refe r e nc e, Safety.

4Adoption of t h e Amendment Accordingly , under the authority de lega t ed to me by the Adm inistrator, th e FAA amends 14 CFR part 39 as follows : 

### PART 39

- A IRWORTIDN ESS DIRE CTIVES 1. The authorit y citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g) , 40113 , 44701. 

### § 39.13 [Amend e d] 2. The FAA amends§ 39.13 by adding the following new ai rwo rthiness dir ective (AD): 2015-17-19 Rolls-Royce pic : Amendment 39-18252; Docket No. FAA-2014-0363; Directorate I dentifier 20 14

-NE-08- A D. (a) Effective Date This AD is effect ive [INSERT DATE 35 DAYS AFTER DATE OF PUBLICATION 

### TN THE FEDERAL REGISTER]. ( b ) Affected A D s None. (c) Applicability This AD applies to a ll Roll s-Royce p ic (RR) RB21l Tre nt 768-60, 772-60, and 7728-60 turbofan engines, if fitted with fuel tube, pa1t number (PIN) FW53576 , which
was inco rporated through RR production modification 73-F343 or which we re modified in service in accordance w ith RR Service Bulletin (SB) No. RB.211-73-F343 , Revision 4 , dated May 26, 201 1 , o r earli er versions. (d) Reason Th is AD was prompted by fuel leaks caused by damage to the fan case lowpressure (LP) fue l tube. We are issuing this AD to prevent failure of the fan case LP fuel



### 5tube , which could lead to an in-flight engine shutdown , loss of thrust control , and damage to the airplane. (e) Actions an d C ompli an ce Comply with th i s AD within the compliance t imes specified , unless a lready done. (1) Within 800 fl ight hours (FH) after the effective date of this AD , and there after at intervals not to exceed 800 FH , inspect the clip at the uppermost fan case LP fue l tube clip position , CP4881, and support bracket , 

### PIN FW26692. Use Accomp l ishment Instructions , paragraph 3.A, ofRR Alert Non

- Modification Service Bulletin (NMSB) No. RB.211

- 73-AH837, dated S eptember 9 , 2014 , or paragraph 3

. A. or 3

. B. ofRR Alert NMSB No. RB.211-73-AH522 , Revision 2 , dated July I 8 , 2014, or earlier versions , to do your inspection. (i) If the clip at the uppermost cl i p position , CP4881 , fails inspection , rep lace the clip with a part eligible for install ation and , before further flight , inspect the fan case LP fuel tube , 

### PIN FW53576 , for fretting , and clips for cracks or failure , according to Accomplishment Ins t ructions , paragraph 3.A. ofRR Ale rt NMSB No. RB.211-73- AH837, dated September 9 , 2014 , or paragraph 3.A. or 3.B

. ofRR Alert NMSB No. RB.211-73-AH522 , Rev ision 2 , dat e d July 18 , 2014 , or earlier ve rsions. (ii) If the support bracket , PIN FW26692 , fa il s inspection , rep lace the bracket before further flight with a part e li gib le for installation and inspect the fan case LP fuel tube , 

### PIN FW53576 , and clips for cracks or fa il ure. (2) Within 4 , 000 FH since new or 800 FH , whichever occurs late r, after the effective date of this AD , and thereafter at intervals not to exceed 4 , 000 FH , i nspect the fan cas e LP fuel tube , P / N FW53576 , and clips, and the fuel oi l heat exchanger (FOHE) mounts and hardwa r e, for damage , wear , or fretting. Use paragraph 3

. A. or 3.B

. , Accomplishment Instructions , of RR Alert NMSB No

. RB.2 1 1-73-AH522 , Revision 2 , dated July 18 , 2014 , or earlier versions , to do the inspection.
6

### (i) If 

### the fan case LP fuel tube, PIN FW53576, fails inspection, before further flight, rep lace the fue l tube and clips with part s el ig ib le for installation. ( ii ) If any FOHE mount or hardware s hows s igns of damag e , wear, or fretting, replace the damaged part before further night w ith a part eligible for installation. (3) At each shop v is it after the effective date of this AD , inspect the fan case LP fuel tubes, PINs rW26589, FW36335, FW26587, FW53577, and FW53576, and clips , and the FO H E mount s and hardware , for damage, wear, or frett in g. Use paragraphs 3. B. ( l ) and 3.8.(2) of RR Aler t NMSB No. RB.211-73-AH522, Revis io n 2, elated Jul y 18 , 2014 , or earlier versions, to do the inspection. (i) If any fan case LP fu el tube fai ls inspection , replace the fuel tube and clips before further 

### tl ig ht w ith parts e li g ibl e fo r installation. (ii) I f any FO l

- IE mount or hardware s hows s ig n s of dama ge , wear, or fretting,
replace the dama ged pa rt before further f li ght wi th a p art e li gib l e for in s ta ll ati o n. (4) If you replace any fan case LP fue l tube, clip, or FOl-IE moun t or hardware as
a result of the in spectio n s of paragraphs (e)(l ) , (e)(2) , or (e)(3) of this AD , you must still continue to perform the repetiti ve in spec ti ons of paragraphs (e)( l ) , (e)(2) , and (e)(3) of this AD. (5) Any repo rts requested in the A lert NMSB accomplishment ins tru ction s referenced in paragraphs (e)(l), (e)(2) , and (e)(3) of this AD are not required by this AD. (f) Credit for Previous Actions 

### If

, before the effective date of this AD , you pe rformed the inspections and corrective actions requi r ed by paragraph (e)(2) of this AD using RR NMSB No. RB.211- 73

- G848 , Revi s ion 3, date d Jun e 12 , 2014 , o r ea rli er versions , you met th e initia l inspection requirements of parag raph (e)(2) of this AD. (g) D efi niti o ns 

### Fo r the purposes of this AD:


### 7(I) An "e n g in e shop visit" is th e induction of an e n gine into th e s hop for maintenance involv in g th e separation of pairs of

**m~or** mating e n gin e nanges , except that the separat ion of e n g ine flanges solely for th e purposes of transportation witho u t
s ubsequent e n g in e m a intenanc e is not a n e n g in e s hop v isit. ( 2 ) Th e f a n c ase LP fuel tub es a nd c lip s, and the F OHE mount s and hard w are , are eligibl e for in s ta ll a tion i f they have pa sse d th e in s pection require m e nts of paragraphs (e)(l) , (e)(2) , and (e)(3) of thi s AD. (h) A lternative Methods of Complianc e (AMOCs) Th e M a n age r, E ngine Certificati o n Offic e, F AA , may appro ve AMO C s to thi s AD. U se th e proce dures found in 14 C fR 3 9.19 to make y our re qu es t. You may e mail y our requ es t to: ANE-AD-AMOC @ f aa. gov . (i) Related Information (1) For more info rm ation about thi s AD , co nt act Wego Wang , Ae rospace Engineer , E n g in e Ce rtification Offic e, FAA , E n g ine & P rop e ll e r Dir e ctorate, 12 New England E xec uti ve P a rk , Burlin g ton , M A 018 03; phone: 781- 23 8- 7 1 3 4 ; f ax : 781-238- 7199 ; email: wego . w an g @ f a a.go v . (2) Ref e r to MCAI European Av i ation Safety Agency AD 2 0 14-0243R1 , dated December 10 , 2014 for more information. You may exam in e the M C A I in the AD docket
on the Intern e t at http: //www .r egulation s . g o v/# !documentDetail ; D = FAA-2014-0363- 0004. 

### U) Materia l In co rporated 

### b y R e fere nc e 

### (1) Th e Di re ctor of the Fede ra l Re gi s t e r approved the incorporation by reference (IBR) of the servic e info rmat ion listed in th is paragraph und e r 5 U.S.C. 552(a) and 1 CFR part 51.(2) Yo u mu s t u s e this serv ic e inf o rmation as applicabl e to d o th e action s require d b y this A D , unl ess the AD specifie s o th e rw ise . 8

### (i) Rolls -Royce pic (RR) Ale t t Non-Modification Service Bull e ti n (NMSB) No. RB.211-73

- AH522 , Revision 2 , dated July 18 , 2014. (ii) RR NMSB No. RB.21 1-73-AH837 , dat ed September 9 , 2014. (3) For RR service information identified in this AD , contact Rolls-Ro yce pic , Corporate Communications , P .O

. Box 31 , Derby , Eng l and, D E24 8BJ; phone: 011-44- 1332

- 242424; fax: 0 1 1-44-1332-249936; email: http://www.rollsroyce.com / contact / civ il

_ team.jsp; Internet: https://www.aeromanager.com. (4) You may view this service information at the FAA , Eng in e & 

### Propeller Directorate , 12 New England Executive Park , Burlington , MA. For information on the availability of this material at the FAA , call 781-238-7125. (5) You may view this service information that is in corporated by reference at the National Archives and Records Adminjstration (NARA)

. For information on the availab ili ty of this material at NARA , ca ll 202-741-6030, or go to: http: //www.archives.gov / federal-register/cfi·/ibr-locations.htm l

.
Issued in Burlington , Massachusetts , on August 20 , 2015.

Colleen M. D'Alessandro, Directorate Manager, Engine & 

### Propeller Directorate , Aircraft Certification Service.

9