### DEPARTM EN T OF TRANSPORT AT lON Fe deral Av i ati on A dmini stration 14 CFR Part 39 [Dock et No. FAA-2014-0363; Directorate .Id e ntifi e r 2014-N E -08-AD] RIN 2120-AA64 Ainvorthines s Directives; Roll s- R oyce pi c Turbofan Engine s AGENCY: Fede ral Av iation Administration ( FAA) , DOT

. 

### ACTION : Not ice of proposed rulemakin g (N PRM). 

### [4910-13-PJ

SUMMARY: We propose to a d opt a n ew a irworthin ess dir ec ti ve (.t\D) for all Ro ll s Ro yce pic ( RR) RB2l l Trent 768-60 , 77 2-60, and 772B

- 60 turbofan e ngines. This propos e d AD was p r omp ted by fue l leaks cau se d by dama ge t o th e fan case low-pressure (LP) fue l tube

. Thi s proposed AD would re qu ire in spec tion of th e fan case LP fuel tube s and associated c lip s and th e fue l o il heat exc hanger (F O HE) mount s and assoc iated hard wa r e. We a re pro p os in g this AD to pr eve nt failure of th e f a n case LP fue l tube , which cou ld lead to an in-fli g ht shutdow n of o ne or more engines du e to fuel starvation , loss of thru s t co ntro l, and damage to the a irp l ane . 

### DAT E S: We mu s t receive conunents on this proposed AD b y [fN SE RT DATE 60 D AYS AFTER DATE OF PUBLICATION TN TH E FEDERAL R EG ISTER]. 

### AD DRESSES: You ma y send comments b y any of the following m e th o d s:
• Federa l e Rulemaking Po rta l : Go to http: //www .r egu la ti o n s.gov and follo w th e in struction s for se ndin g your comme nt s e l ec tro ni ca ll y . • Mail: D oc ket Management Faci lity , U.S. Dep art me nt ofT r a n s portation, 1200 New Jer sey Avenue SE., West Bui ldin g Gro und F loo r , Room W 12 -140 , Washington , D C 20590

- 000 I

.• Hand De li ve ry: Deliver t o Mai l a ddre ss above between 9 a.m. and 5 p.m. , Monday th roug h Friday , except Fed e ral holidays.
• Fax: 202-493

- 2251. Fo r serv i ce information identifi ed in thi s propos e d AD , contact Roll s - Ro yce p ic , Corporate Co mmuni c ation s , P.O. Bo x 3 1 , Derby , Eng land , D E248B J ; ph o ne: 0 1 1-44- 1332

- 242424; fax: 011-44-1332-249936 ; e mail: http: //www .rollsroyce.com/co nt ac t /c ivil

_ team
. jsp ; Web s ite: https: //www.aeromana ge r.com. You may
v iew this se rvic e information at the FAA, E ng in e & Prop elle r Dir ec torate , 12 New England Executive Pa rk , Burlington , MA. For inf o rmation on the avai labilit y of this material at the FAA, call 781

- 238

- 7125. Exa minin g th e AD Docket You ma y examin e th e AD docket on the In ternet at http ://www. reg ulations. gov by
searc hi ng for and loca tin g Docket No. FAA-20 14-0363; or in person at th e Docket Operation s office b etwee n 9 a.m. a nd 5 p.m. , Monday through Frid ay , exce pt Federal holidays. The AD docket contains th is proposed AD , the mandatory conti nuin g airworth in ess in fo rm ation ( MC A J ) , the r eg ul ato ry eva luati on , any co mm e nt s r ece ived , and other inf orm ati o n. The addre ss for the Docket Offic e (phon e : 800-647-5527) is in the ADDRE SSES sec tion

. Co mmen ts w ill be ava il ab le in the AD docket s hortl y after rece ipt. 

### FOR FURTHER IN FORMATION CONTACT: Wego W a ng , Ae ro space Engi n eer, E ngine Ce rtifi cati on Office , FAA , Engine & Prop eller Dir ecto rate , 12 New Eng land Exec u tive Park , Burlington , MA 0180 3 ; phone: 78 1- 238

- 7134 ; fax: 78 1- 23 8-7 1 99; e m a il:
wego .wang @ faa.gov. 

### SUPPLEMENTARY INFORMA TJON: Comments Invited We invite yo u to se nd an y written r elevan t data , views , o r argu m e nts about this proposed AD. Se nd yo ur comments t o an a d dress li sted und er th e ADDRESSES sec ti on. 2In clude "Docket No. FAA-2014 -0 363; Directorate Identifier 2014-NE-08-AD" at the beginning of your comments. We specifically invite comments on the overall regulatory , eco nomic , e n vironmental, and energy aspects of this proposed AD. We will consider all
commen ts rece ived by the c los in g date and may amend thi s propo sed AD based on those comments. We wi ll po st all comments we receive, without change, to ht1p: //www

. regu l at ions.gov, includin g any personal inf orma tion you provide. We will also post a report summa ri z ing each s ubstantive verbal con tact with FAA personne l concerning this proposed AD. 

### Discussion The European Aviation Safe t y Agency (EASA), wh i ch is th e Tech nical Agent for the Member States of the European Communi ty, h as i ssued EASA AD 2014-0089, dated April 15 , 2014 (referred to hereinafter as " the MC/\1 "), to correct an un safe condition for th e spec ifi ed products. The MCAI states: Fuel leaks from the engine have occu rred in-service due to damage to sections of the fan case low-pressure (L P) fu e l tub e which runs betwee n the fuel oi l heat exchanger (FO H E) and the high pressure fuel pump. Fret1age damage between the securing c lip s and the tube ou ter surface has been caused by excessive movement w ithin the sys tem that result e d from deterioration ofthe FOl

-IE mounting hardware. The thinning of the tube wall causes the tube to fracture and fuel loss to occ ur. This co ndition , i f n ot detected and co rr ected, could lead to a criti cal fuel imbalance o r in-flight fuel sta rv ation, possib ly resulting engine in-tlight shut-down and, consequently, reduced control of the aeroplane. For the reasons described above, this AD requires repetitive on wing and in-shop in spec ti o n s and, depending on findings, rep laceme nt of fan case LP fue l tub es, clips a nd FOl

- IE mounting hardware.

3You may obtai n further inf o rm ation by exam ining th e MCA I in the AD docket on the Internet at http://www .regu lations.gov by search ing for and locating Docket No. FAA

- 2014-0363. 

### Relevant Service Information RR has issued Alert Non

- Modification Service Bull etin (NMSB) No. RB. 211 -7 3- AH522 , Revision I , dated March 18 , 2014. The Ale11 NMSB describes procedures for on-wing and in-shop in spection and replacement if neces sa ry , of the LP fue l tubes and FOHE mounts and associated hardware. 

### FAA's Determination a nd Requirements of T hi s Proposed AD Thi s product has been approved by the aviation autho ri ty of the United Kingdom and is approved for operatio n in the United S tates. Pursuant to our bilateral agreement
w ith the European Co mmunity , EASA has notified us of the un safe co ndition describ ed in the M CA l and se rvice inform ation referenced above. We are proposing this AD because we evaluated all information provided by EASA and determined the unsafe condition exists and is likely to exist o r develop on other products of the same type design. This proposed AD would require inspection of affected LP fuel tubes and FOHE mounts and associated hardware and , if necessary, replacement w ith a part eligib l e for installation. 

### Costs of Co mpli a nce We estimate that this proposed AD would affect about 50 e ngines in stalled on airplanes of U.S. registry. We also estimate that it would take about 6 hours per engine to comply with this proposed AD. The ave r age labor rate is $85 per hour. Based on these figures, we est imate the cost of thi s proposed AD on U.S. operators to be $25,500. 

### Authority for This Rulemaking Title 49 or the United States Code specifies the FAA ' s authority to issue rules on
av iation safety. Subtit le I , section I 06 , desc rib es the authorit y or the FAA Admi ni strato r. 

### 4"S ub t it le V U: Av iation Programs," describes in more detail the scope of the Agency's authority. We are issuing this ru l emak ing und er the authori ty de sc ri bed in "S ubtitle VII , P art A, Subpart III , Sectio n 44701: General requirements. " Under that section, Congress charges the F AA with promoting safe flight of c ivi l aircra ft in air commerce by prescrib in g r egu lations for practi ces, meth o d s, a nd procedur es the Ad mini s trator find s necessary for safety i n a ir co mm e r ce. This r eg ulation i s w ithin th e scope of that authority becau se it a ddresses an unsafe condition th at i s li kely to ex i s t or develop on prod u cts identified in thi s rul emaki n g action. 

### Regulatory Findi n gs We d e te rmin ed that th i s proposed AD would not have fede ra li s m implicati ons under Executive O rder 13132

. Thi s proposed A D woul d not hav e a s ub s tantial direct effect on th e States, on the relationship between the nationa l Government a nd th e States , o r on th e distribution of power and respon s ibilities among th e various levels of government. For the reasons discussed ab ove, I ce rtif y thi s proposed regu l at i on: ( 1) I s n ot a "s i g nificant reg ul ato ry ac tion " under Exec uti ve Order 1 2866, (2) I s not a "s ign ific ant rul e " und e r the DOT R egu latory Po li c ies and Pro cedu r es ( 44 FR 11 034 , February 26, 1979). (3) Wi ll not affect intrastate aviation in A laska to the exten t that it justifies making a regulato ry d i s tin c tion , and (4) Will not have a s ignificant eco n o mic impact , po s iti ve or ne gati ve, on a
s ub stantial numb e r of s mall entities und e r th e crite ri a ofth e R egu latory F lex ibi lit y Act. 

### List of S ubj ects in 14 CFR Part 39 A ir transportatio n , A ircraft, Av iat ion sa fety , Incorporation by reference , Safety.

5The Proposed Amendment According ly, under the authori t y del ega ted to me by the Adm in istrator, the FAA proposes to ame nd 14 CFR part 39 as follows: 

### PART 39- AIRWORTIDNESS DIRE CTIVES I. The authority c itation for part 39 cont inues to read as follows: Authority: 49 U .S. C. 106(g) , 40113 , 44701. 

### § 39.13 [Amended! 2. Th e FAA amends§ 39. 1 3 by add in g the following new airworthiness directive (A D): Roll s- Royce pic : D ocke t No

. FAA-2014-0363; Directorate Identifier 20 14- NE-08- A D. (a) Comments Due Date We mu st receive comments by [INSERT DATE 60 DAYS AFTER DATE OF PUBLICATION TN THE FEDERAL REGISTER]. (b) Affected ADs None. (c) Applicability Thi s AD applies to a ll Rolls-Royc e pic (RR) RB211 Trent 768-60, 772-60, and 772B-60 turbofan e n g ines. (d) Reason This AD was prompted by fuel leaks caused by damage to the fan case lowpressure (LP) fuel tube. We are issuing thi s AD to prevent failure of th e fan case LP fuel tube, which could lead to an in -flight sh utdown of one or more engines due to fuel starvation, los s of thrust contro l , and damage to the airplane. 

### (e) Actions and Compliance Co mpl y wi th this AD within the compliance times spec ifi ed , unless already done.



### 6(1) For e ng in es that ha ve 3 , 200 or more fli g ht hours s in ce new (FHSN) on th e ef

fective d a t e of thi s AD, within 800 fli g ht hour s ( FHs) after th e effect ive date of this AD, acco mpli s h a n on-wing in spect io n o f fan case LP fuel tubes , part number (PIN) FW53576 , and assoc iated clips , and the fue l oil heat exc h a n ge r (FO HE) mounts and associated h a rdware. Use paragraph 3

. A. of 

### RR Alert Non-Modificati on Serv ice Bu lle t in (NMSB) No

. RB. 21 1-7 3

- A H5 22 , Revision I , dated March 18 , 2014 , to do the insp ection. Thereafter , inspect at intervals not to exceed 4 , 000 FHs. (2) For e ngi nes that have le ss than 3 , 200 FHSN on the effect iv e d ate of this A D , before exceed i ng 4 , 000 FHSN , accomplish a n o n-w i ng in spection of fan case LP fuel tubes , 

### P IN FW53576 , a nd associated clip s, a nd the FOHE mounts and associated hard wa r e. U s e paragraph 3.A

. ofRR A le rt N M SB No. RB. 2 11 -73-A H 522 , Revision 1 , dated March 18 , 20 14 , to do the inspection. Th e reafter , in spect at inte rval s not to exceed 4,000 FHs. (3) Afte r the effective date of thi s AD , during each e ngine shop v is it , inspect th e fa n case L P f uel tu bes , PIN s FW26589, fW36335 , F W26587 , FW535776 , and FW 53577 , an d associated c lip s , and th e F OH E mounts and associated hardware. Use p a ragraph 3.B. ofRR A lert NMSB No

. RB.211-7 3 -AH 522 , Rev is ion 1 , date d March 1 8 , 2014, to do the inspection. (4) If any in spection required by paragraphs (e)( I) , (e)(2) , o r (e)(3) of this A D fails , replace the affec ted part with a part elig ibl e for in stall at ion. (f) Credit for Previous Actions ( I ) If , before th e effective date of this AD , you perform ed the in s p ec tions and corrective act io n s r eq uired by paragrap h s (e)( I ) , (e)(2) , or (e)(3) of thi s AD using RR A lert NMSB No. RB.211-72-AH522 , dated Septem b er 20 , 20 1 3 , you met the initial inspection requi remen t s of paragraphs ( e)( I). (e) (2) , o r (e)(3 ) of thi s AD.

7(2) Any in spec tions and corrective actions performed before the effective date of this AD are not terminating action for the repetitive inspections r equi r e d by paragraphs (e)(I), (e)(2), and (e)(3) of this AD. 

### (g) Definition s For th e pu rposes of thi s AD: (I) An "e ngine shop visit" is th e in duction of an engine into th e s hop for maintenance invo lvi ng the separa tion of pairs of major mating engi ne flanges , except that the separation of e ngine flan ges so l e l y for th e purposes of transport ation without subsequent e n g in e maintenance is n o t an e n gine shop visit. (2) The fan case LP fuel tubes and assoc ia t ed clips, and the FO H E mounts and associated ha rdw a r e are e ligible for in s tallation if they have passed the inspection requirements of paragraphs (e)(l) , (e)(2) , and (e)(3) of this AD. 

### (h) Alternative Methods of Compliance (AMOCs) The Man age r, Engine Certification Office , FAA , may approve AMOCs to this AD. Use the procedures found in 14 CfR 39. 19 to make y our r eq uest. 

### (i) Related Information (I) For more information about thi s AD , contact Wego Wang , Aerospace Engin eer, Engine Ce rtifi cation Office , FAA , Eng ine & Propeller Directorate , 12 New England Exec utiv e Park , Burlington , MA 01803; ph one: 78 1 -238-7 1 3 4 ; fax: 781-238- 7199 ; e mail: wego.wang @ faa.gov. (2) Refer toMCA T European Av ia tion Safe ty Agency AD 20 14-0089 , dated April 15, 2014 , for more information. You may exa mine the MCAI in the AD docket on the Interne t at http: //w ww.regulations.gov by sea rching for and locatin g it in Docket No. FAA-20I4-0 363.



### 8(3) RR A le rt NMSB No. RB. 2 1 1-73-AH52 2 , R e vi s ion 1 , dat e d M arch 18 , 20 14 , wh ic h is not in co rp orated by reference in this AD , can be ob tained from R olls -Royce pi c
u s in g th e contact inf o rm ation in p a ra g ra ph ( i)(4) of th is A D. (4) For se rvi ce i n fo rmation id e nlitied in this AD , co ntact Roll s-Royce pic , Co rporat e Co mmuni cat ion s , P.O. B ox 3 1 , D erby , Eng land , D E248 BJ ; phone: 0 1 1-44- 1 332

- 24 2424; fax: 0 11-44-1332

- 249936; emai l : http: //www .roll s royc e.c om / contact /c ivil

_ team .j s p ; We b s it e : http s://www

. aero mana ge r. co m. (5) You may v iew this service info rm at ion at the FAA , Engin e 

### & Propeller Dir ec tor at e , 12 New En g land Exec uti ve P ark , Burlin g ton , MA

. Fo r in formatio n on th e availab ili ty of th is mate rial at the FAA , call 781-238-71 25

.
Iss u ed in Burlin gto n , M assachu setts , o n June 27 , 20 1 4.

Co ll ee n M. D ' Alessandro , A s sista nt Directora t e Manager , E ng in e & Propeller Directorate , Ai rc ra ft Certifi cation Serv ice.



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