### DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. 

### FAA-2013-0052; Directorate Identifier 2013-NE-02-AD] RIN 2120-AA64 Airworthiness Directives; Rolls-Royce pic Turbofan Engines AGENCY: Federal Aviation Administration (FAA) , DOT. 

### ACTION: Notice of proposed rulemaking (NPRM). 

### [4910-13-P]

SUMMARY: We propose to adopt a new airworthiness directive (AD) for all RollsRoyce plc (RR) RB211-535E4-37 , RB211-535E4-B-37 , RB211-535E4-C-37 , and RB211-535E4-B-75 turbofan engines. This proposed AD was prompted by RR updating the low-cycle-fatigue life analysis for the low pressure turbine (LPT) stage 2 discs. This proposed AD would require removal of affected pmts using a drawdown plan. We are proposing this AD to prevent LPT stage 2 disc failure , which could result in uncontained engine damage and damage to the airplane. 

### DATES: We must receive comments on this proposed AD by [INSERT DATE 60 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. 

### ADDRESSES: You may send comments by any of the following methods:

• Federal eRulemaking Portal: Go to http: //www.regulations.gov and follow the instructions for sending your comments electronically.• Mail: Docket Management Facility , U
. S. Department of Transportation , 1200 New Jerse y Avenue SE., West Building Ground Floor , Room W12 -1 40 , Washington , DC 20590-0001.

• Hand Delivery: De li ver to Mail address above between 9 a .m . and 5 p.m. , Monday through Friday, except Federal holida ys.
• Fax: 202-493-2251. For service information identified in this AD , contact Rolls-Ro yce pic , Corporate Communications , P.O. Box 31 , Derby , E ngland , DE248BJ ; phone: 011-44

- 1 332

- 242424; fax: 011-44-1332 -2 49936; or e mail from http: //www.ro ll sroyce.com /contact / civil

_ team.jsp ; or download the publication from https: // www.aeromanager.com. You may view thi s service information at the FAA , E ngin e & Prop e ller Directorate , 12 New E ngland Exec uti ve Park , Bur lin gton , MA 01803. For information on the ava ilabilit y ofthis material at the FAA , call 781-238-7125. Examini ng the AD Docket You may examine the AD docket on the Internet at http :/ / www.reg ulation s .go v;
or in person at th e Dock e t Operations office betw ee n 9 a.m. and 5 p . m. , Monday through Friday , except Federa l holidays. The AD docket contains this proposed AD , the regu latory evaluation , any comments received , and other information. The street address for the Docket Operations office (p hon e: 800

- 647

- 5527) is the same as the Mail address provided in the ADDRESSES section. Co mments wi ll be ava il ab le in the AD docket
s hortl y after receipt. 

### FOR FURTHER INFORMATION CONTACT : Robert Green , Aerospace Engineer , E ngine Certification Office , FAA, E ngine & Propeller Directorate , 12 New E ngland 2Executive Park , Burlington , MA 01803 ; phone: 781-238-7754 ; fax: 781-238-7199 ; email: Robert. Green @ faa. gov. 

### SUPPLEMENTARY INFORMATION: Comments Invited We invite yo u to send any written relevant data , views , or arguments about this proposed AD. Send yo ur comments to an address listed under the ADDRESSES section. Include " Docket No
. FAA

- 2013-0052 ; Directorate Identifier 2013-NE-02-AD " at the beginning of your comments. We specifica ll y invite comments on the overall regulatory , economic, environmenta l, and energy aspects of this proposed AD. We will consider all comments received by the c losing date and ma y amend this proposed AD based on those comments. We wi ll post all comments we receive , without change , to http :/ /www.regulations.gov , including any personal in formation you provide
. We will also post a report summarizing each substantive verbal contact with FAA pers01me l
concern in g th i s proposed AD. Using the searc h function of the Web site , anyone can find and read the comments in any of our dockets , including , ifprovided , the name ofthe individual who sent the comment (or signed the comment on behalf of an association , bu s iness , labor union , etc.). You may review the DOT's complete Privacy Act Statement in the Federal Re g i s ter published on April11 , 2000 (65 FR 19477-78 )
. Discussion The E uropean Aviation Safety Agency (EASA) , which is the Technical Agent for the Member States of the E uropean Community , has issued EASA AD 2012-0266 , dated



### 3D e c e mb e r 18 , 20 1 2 , t o c o rrec t a n un safe co nditi o n for th e s p ec ifi e d p ro du c t s. T h at
m a nd a to ry co n tinuin g a ir w orthin ess in fo rm ati o n (MCA I ) stat es: A rece nt re - eva lu at i o n of C ritic a l P art li ves ca rri e d o ut by R o ll s R oyce reve al e d c h a n ges to th e th e rm a l pro fil e a nd s tr esses in certa in fea tur es of th e low p ress ure turbin e (L P T) S t age 2 di s c . T hese c h a n ges h ave res ult ed in a re du c ti o n of th e cyc li c li fe oft he L P T s tage 2 di scs . O p e ra ti o n o f a n e n g in e e quipp e d w ith a C riti ca l P art th at h as ex c ee d e d it s c y cli c li fe m ay res ult in C riti ca l P art fa ilure , co n se qu e nt re lease of hi g h e ne r gy d e bri s , d a m age t o th e ae ropl a n e a nd / o r injury to occ up a nt s. We are pro p os in g thi s A D to preve nt L PT s tage 2 di sc fa ilure, w hi c h co uld res ult in
un co nt a in e d e n g in e d a m age a nd d a m age to th e a irpl a n e. Y o u m ay o bt a in f urth e r info rm a ti o n b y exa minin g th e M CA I in th e A D d o ck et. Rele v ant Service Information RR h as i ss u e d A l ert No n- Mo di fica ti o n Serv i ce Bull e tin (NMS B ) No. RB .2 11- 72- AH0 29 , d ate d D ece mb e r 1 3 , 2 01 2. T he NMS B intr o du ces new LP T s tage 2 di sc p art li ves th a t w ill b e th e dr aw do w n pl a n retire m e nt tlu·es hold s. FAA 's Det e rmination and Requir e ment s of thi s Propo s ed A D T hi s pr o du c t h as b ee n appr ove d b y th e av i ati o n a uth o rit y of th e U nit e d Kin g d o m
and i s a ppr ove d fo r o p e r a ti o n in th e U nite d S ta tes . Pur s u a nt t o o ur bil ate r a l agree m e nt
w ith th e E ur opea n Co mmunit y , EASA h as n o ti fie d u s of th e un safe co nditi o n des c r ib e d in th e MCA I a nd serv i ce in for m a ti o n refe re n ce d a b ove. We are pr o p os in g thi s A D be c au se we eva lu at e d a ll inform ati o n pr ov id e d b y EASA a nd d e termin e d th e un safe
co nd iti o n ex i s t s a nd i s like ly t o ex i s t o r deve lo p o n o th e r pro du c t s of th e sa m e t ype des i g n. T hi s pro p ose d A D wo uld re quire re m ova l of affec t e d L P T s tage 2 di scs u s in g a dr aw d ow n pl a n . 4Difference s Between th e A D and the MCAI or Service Inf01·mation T hi s A D di ffe r s f rom EAS A A D 2 01 2 -0 2 66 , date d D ece mb e r 18 ,2 01 2 , a s follo ws: T he EASA A D s p e cifi es repl ac in g th e affe cte d c riti ca l p a rt s durin g th e m o dul e di sasse mbl y if th e s ub se qu e nt , a nti c ip ate d tim e o n w in g ( tim e b efo re n ex t s hop v i s it) p lu s
c urre nt lif e of th e p art w ill excee d th e n ew prov i s ional li ves publi s he d in th e RR A lert NMS B No. RB. 2 ll- 72

- A H0 29, d ate d D e c e mb er 1 3, 2 01 2. W e s p ec ify re pl ac in g at nex t
s hop v i s it ( d e fin e d b y th e se p ar ation of a m a j o r fl a n g e ). Cost s of Compliance W e es tim ate th at thi s prop ose d A D wo uld af fect a bout 22 0 e n g in es in s ta ll e d o n
airpl a nes of U.S. reg i s try . T he ave ra ge l a b o r r at e i s $ 85 p e r ho ur. W e do n o t es tim at e a n y labor c o s t ass o c iat e d w ith thi s prop ose d A D b e cau se th e af fec te d p art s a re replac e d durin g s ch e dul e d s h o p v i s it s . Prorate d c os t of th e part s adju s te d f or los t lif e i s about $ 8 , 29 0 p e r e ng in e. B ase d o n th ese fi g ures , we es tim at e th e c os t of th e pr o p ose d A D o n U
. S
. o p e rator s to b e $ 1 , 823 , 800
. Authority for Thi s Rulemaking T itl e 4 9 of th e U nited S tat es Co d e s p e cifi es th e F A A ' s a uth o rit y to i ss ue rul es on
a v iati o n safe ty. S ubtitl e I , se ction 10 6 , d esc rib es th e authorit y of th e FAA A dmini str ato r.

" S ubtitl e V II : Av i a tion Pro g ram s, " d esc rib es in more d e ta il th e s c o p e of th e Age nc y ' s
authorit y. W e are i ss uin g thi s rul em a kin g und e r th e authorit y d es crib e d in " S ubtitl e VII , Part A , S ubp a rt III , Se ction 44701 : Ge ne r a l re quire m e nt s . " U nd e r t h at se cti o n , Co n g ress
c h arges th e FAA w ith p r o motin g safe fli g ht of c iv il aircr aft in a ir co mm e rc e b y presc ribin g reg ul ati o n s fo r prac ti ces , m e th o d s , a nd pro ce dur es th e A dmini s tr ator find s 

### 5necessary for safety in ai r commerce. This regulation is with in the sco pe of that authority because it addresses an unsafe cond iti on that i s lik e ly to exist or develop on products identified in this rul emaking action. Regulatory Findings We determined that this proposed AD would not have federa li sm implications under Executive Order 13132. This proposed AD would not have a s ubstantial direct effect on the States , on the relationship between the n at ion a l Governme nt and the States , or on the distribution of power and responsibilities amo n g the various leve l s of goverm11ent. For the reasons discussed above , I certify this proposed regulation: (1) I s not a " significant regulatory act io n " under Executive Order 12866 ; (2) Is not a " s i gnifica nt rule " under the DOT Regulatory Policies and Procedures (44 FR 11 034 , Febr uary 26 , 1979) ; and (3) Will not affect intrastate aviat ion in A l aska to the exte nt that it justifies making a regulatory distinction , a nd (4) Will not have a significant economic impact , positive or negative , on a substantial number of sma ll entities under the criteria of the Regulatory Flexibi lit y Act. We prepared a regu lat ory eva lu ation of the estimated costs to comp l y with this proposed AD and placed it in the AD docket. List of S ubject s in 14 CFR Part 39 Air transportation , Aircraft , Av i ation safety , Incorporation by reference , Safety.

6

### The Propo s ed Amendment Ac cordin g ly , und e r th e a uth o rit y d e legate d to me b y th e A dmini strator , th e FAA pro p oses t o a me nd 14 CF R p a rt 39 as fo ll ows : 

### PA RT 39- A IRWORTHINE SS DIRE C TIV ES I. T he a uth o rit y c it ati o n fo r p art 39 co ntinu es to read as foll ows: A uth o rity: 49 U.S.C. 10 6(g) , 4011 3 , 44 7 0 1. 

### § 39.13 [A mended] 2. T he FAA a me nd s§ 39
. 1 3 b y add i n g th e fo ll ow in g new A D : 

### Rolls-Ro y ce pic: D oc ket N o . FAA

- 2 01 3 -00 52 ; Dire cto rate Id e ntifi e r 20 1 3

- NE

- 0 2

- A D
. 

### (a) C omment s Due Date W e mu st rece ive comm e nt s by [IN SE R T D ATE 60 D AYS AFTE R D ATE OF PUBLICA TI ON IN T H E FED ERAL REG I STE R]. 

### (b) A ffected A irworthines s Directi v e s (A D s ) No ne . 

### (c) A pplicability T hi s A D appli es to a ll R o l l s -Roy c e p lc (RR ) RB 2 11- 535E 4- 3 7 , RB 2 11

- 535E4-B3 7 , RB 2 11- 535E4- C

- 3 7 , a nd RB 2 11- 53 5 E 4-B- 75 turb ofa n e ng in es. 

### (d) Rea s on T hi s A D was pro mpted b y RR upd at in g th e low - cyc le - fa ti g u e li fe a n al ys i s fo r th e low press ure turbin e (L P T) s tage 2 di s c s . We a re i ss uin g thi s A D t o preve nt L P T s tage 2 di sc fa ilure , w hi c h co uld res ult in u nco nt a ine d e n g in e d am age a nd d am age to th e
a irpl a n e.

7(e) Action s and Compliance (1) Within 30 d ays aft e r th e effec ti ve d a te of thi s A D , re - ca lcul ate th e cyc li c li fe
s in ce n ew of eac h L PT s tage 2 di sc. Use th e part li ves a nd p ro rate d li fe fo rmul as in A pp e ndi ces 1 , 2 , a nd 3 of RR A le rt No n- Mo di fica tion Se rv ice Bull etin (NMS B ) No. RB. 2 11- 72

- A H0 29 , d ate d D ece mb er 13 , 2 01 2 , t o mak e th at calcul ati o n . (2) Ass ig n th e Max imum Appr ove d L ives d e fin e d in App e ndi x 1 of A le rt NMS B No. RB
. 2 11-7 2

- AH 0 29 , d at e d D e c e mb e r 1 3 , 2 01 2 , to th e LPT s ta ge 2 di sc b ase d o n th e fl ig h t pr ofi le th at w ill b e fl ow n . (3) Fo r e n g in es that h ave a n e n g in e s h o p v i s it (ESV) af t e r th e effe cti ve d at e of thi s A D , re m ove th e L P T s tage 2 di sc f rom se rv ice b efo re th e p art excee d s th e m ax imum
approve d li fe ass ig n e d in p a rag ra ph (e)(2) of thi s A D
. (4) Fo r th ose e n g in es th at d o no t h ave a n ES V af t e r th e ef fec ti ve d ate of thi s A D b efo re th e p art ex c ee d s th e p art li fe ass ig ne d in p ara g r aph (e)(2) of thi s A D , re m ove th e p art f ro m se rv ice at th e n ex t ES V
. (f) In s tallation Prohibition With th e ex c epti o n of p a rt s th at can b e rewo rke d u s in g RR Se rv ice Bull etin No
. R B.2 11- 72 -D 365 , R ev i s io n 5 , d ate d D ece mb e r 1 3 , 2 01 2 , d o no t re in s ta ll a n y part
re mo ve d p e r thi s A D into an y e n g in e. ( g) D efinition s Fo r th e purp ose of thi s A D , a n ES V i s w h e n eve r e ng in e m a int e nan ce p e r fo rm ed p ri o r t o re in s ta ll ati o n re quires th e se p ar ati o n of a p a ir of m a j o r m atin g e n g in e m o dul e fla nges. Se p ar ati o n of fla nges so le ly fo r th e purp ose of s hipm e nt w ith o ut s ub se qu e n t inte rn al m a int e n a nce i s n o t a s h o p vis it. 8(h) A lternati v e M e thods of Complianc e (AM OC s ) T he Ma nager , E n g in e Ce rti fica ti o n Of fi ce , FAA , m ay ap prove AMOCs to thi s A D
. Use th e proce du res fo und in 14 CF R 39 .1 9 to m ake yo ur re qu est. (i) Related Inform a tion (1) Fo r m o re in fo rm ati o n a bo ut thi s AD , co nt ac t R o b e rt G ree n , Ae ros p ace E ng in ee r , E n g in e Ce rti fica ti o n Office , FAA , E n g in e & Prop e ll e r D irecto rat e , 1 2 New E ng la nd Exec uti ve P ark , B urlin g to n , MA 0 180 3 ; phon e : 781- 23 8- 775 4 ; fax: 781- 23 8- 71 99 ; e m a il : R o b e r t.G ree n @ faa
. gov. (2) R efe r to E u ro p ea n Av iatio n Safe ty Age ncy A i rwo rthin ess Direct ive 20 1 2

- 0266, d ate d D ece mb er 18 , 20 1 2, and RR A le rt NMSB No. RB .2 11- 72

- AH029 , d ate d D ece mb e r 1 3 , 2 01 2 , fo r re l ate d in fo rm ati o n . (3) Fo r se rv ice in fo rm ati o n id e nti fie d in thi s A D , co ntac t R o ll s-Royce plc , Corpo r at e Co mmuni cati o n s , P.O. B ox 3 1 , Derb y, E ng l a nd , D E248 BJ ; ph o ne: 0 11 -44

- 1 332

- 242424 ; fax: 0 11 -4 4

- 1 332

- 249936 ; or e m a il fro m http :// www.ro ll s roy c e.co m/co nt ac t / c iv il

_ te am . j sp ; o r d ow nl oad th e publi cati o n fro m http s: //www . ae ro m a nage r.c o m. Y o u m ay v iew thi s se r v ice in fo rm ati o n at th e FAA , E n g in e & P rope ll e r Direc t or ate , 1 2 New E n g l a nd Exec uti ve P a rk , B urlin g t o n , MA 0 180 3. Fo r in fo rm ati o n o n th e ava il a bili ty ofthi s m a ter i a l a t th e FAA , ca ll 781- 238 -71 25
.

9

### Issued in Burlington, Massachusetts, on March 28 , 20 13.

Co ll ee n M. D ' Alessandro, Ass istant Manager , E ngine & 

### Propeller Directorate , Aircraft Certification Service.

10