### [4910-13-P) DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2015-0593 ; Directorate Identifier 2015-N E -08-AD; Amendment 39-18254; AD 2015-17-21] RIN 2120-AA64 Ainvorthiness Directive s ; Rolls-Royce pic Turbofan Engine s AGENCY: Federal Aviation Admin i stration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a new a irw o rthin ess directive (AD) fo r all Roll s -Royce plc (RR) RB211-535E4-37 , RB211-535E4-B-37 , and RB2ll-5 35E4-C-37 turbofan
e ngi nes . Thi s AD requires reducing th e cyc li c lif e li m it s for cer tain high-pressure tu rbine (HPT) di s ks , re moving tho se disks that have exce e ded the n ew life limi t, and replaci ng th em w it h serv iceable parts. Thi s AD was prompted by RR updating the life limi ts fo r
ce 11 ai n HPT disks. We are issuing this AD to prevent fai lure of the HPT disk , whic h
co uld result in uncontained disk r e lease , damage to the e ngine , and damage to the
airpl ane. DAT E S: This AD becomes effec ti ve [INS E RT DATE 35 DAYS AFTER DATE OF PUB LICATIO N IN THE FED ERAL REGISTER]. The Director of the Federal R eg ister approved the incorporation by reference of a certain publica ti on li sted in thi s AD as of [INSERT D ATE 35 DAYS AFTER D ATE OF PUBLICATION IN T H E FE DERAL REG IS TER).

### ADDRE SSES: For service information identified in this AD , contact Rolls-Royce pic , Corpo rate Co mmunic ation s, P.O. Box 3 1 , De rby, Eng land , DE24 8BJ; phone: 011--44- 1 332

- 242424 ; fax: 01 1 --44

- 1332

- 249936; ema il: http://www.rollsroyce.com/ contact/civil_team.jsp; Internet: https: // www.aeromanager.com. You may view this se r vice infonnation at the FAA , Engine & Prop eller Dir ecto rate , 12 New Eng land Execu ti ve Park , Burlin gton, MA. For inf o rma tion on the ava il ability of this material at the FAA, call781

- 238-7125. lt i s also ava ilabl e on th e In ternet at http: //www.regulatio n s.gov by searching for and loca tin g Do cket No. FAA

- 2015

- 0593. 

### Examining th e AD Docket You may exa mine the A D docket on the I nternet at http: //www. r egulations.gov by
searc hin g for and l ocati n g Docket No. 

### F AA-20 1 5-0593; or in person at th e Docket Mana gemen t Fac ili ty betwee n 9 a.m . and 5 p.m. , Monday through Friday , exce pt Federa l holidays. Th e AD docket contains thi s AD , the mandatory continuing airwo rt hiness informatio n (MCAI), the regu latory eva lua tion, any com m ents received , and other information. Th e add r ess for the Docket Office (p hon e : 800-647-5527) i s Document Management Facility , U.S. Departm e n t of Transporta tion , Docke t Opera tions , M-30 , West B uilding Ground Floo r , Room W 1 2- 140 , 1200 New J e r sey Avenue SE. , Wash in gto n , D C 20590. 

### FOR FURTHER INFORMATION C ONTACT: Wego Wang , Aerospace Engin eer, E ngine Certification Office , FAA , E n gine 

### & Propeller Directorat e, 1 2 New Eng la nd Exec u tive Park , Burli ngton , MA 01803; phone: 781-238-7134 ; fax: 781-238-7199; emai l :
wego. wang @ faa.gov.

2SUPPLEMENTARY INFORMATION: Discus s ion We issued a notice of proposed rulemaking (NPRM) to ame nd 14 CF R part 39 by add i ng an AD that would app ly to the specified products. T he NPRM was p ubli shed in the Federal R egiste r o n April 29, 2015 (80 FR 23737). The N PRM proposed to correct an unsafe cond i t io n for the spec ifi ed p r oducts. The MCAI s tates :

Comments A n engineerin g ana lys i s , carried out by RR, of th e lives of critical p arts ofthe RB211-535E4-37 eng in e, has r esulted in red uced cyclic life limi ts for certai n hi gh pressure (HP ) turbin e discs. T he r educed limits are published in the RR RB211-535E4-37 Time Limits Manual (TLM): 05-10-01-800-000, current Revision d ated July 2014. Operation of critical parts beyond t h ese red uced cyclic life lim its may r es ul t in part failure , possibly resulting in the release of highenergy debri s , whic h may cause damage to the aeroplan e and/o r i nj ury to the occupants .

We gave the public the opportunity to participate in developing this AD. We
rece ived no conunent s on the NPRM (80 FR 23737 , Apri l 29 , 2015). Conclusion We reviewed th e ava il ab le data and detetmined that air safety and the public interest require adopti ng this AD as proposed. Related Ser-vice Information under 1 CFR Part 51 We r eviewed RR Non-Modification Service Bulletin (NMSB) No. RB.211-72- 0188 , Revision No .1 , dated October 30,2013 , and RR RB21 1-535£4-37 , Time Limits Manual (TLM) : 05-10-01-800-000 , Revision dated July 

### 1 , 2014; and RR RB211-535E4-37 , TLM: 05-00-01-800-000, Revision dated July 1 , 2014 (refer red to 3hereafter as ' th e TLM '). The NMSB describes the updated lifin g analys is ofthe affected 1

- -I PT disks. The TLM provides revised li fe li mi ts for the affected HPT disks. T l lis serv ice info rmation i s reasonab ly available becau se the interested partie s have access to i t through thei r norma l course of business or see A DDRESSES for other ways to access this
serv ice infom1ati o n. 

### Costs o f C omplian ce We estimate that this AD affect s 650 eng ines installed on airp l anes of U.S. registry. We also es timate that it wou ld ta ke about 0 hours per engine to comply with this AD. The ave rage labo r rate js $85 per hour. The pro-rated cost o f required parts would be about $ 12 ,2 1 3 per e ngi ne. Based on th ese fi g ure s, we estimate the cost of this AD on U.S. operators to be $7,938,450. A uthori ty f o r T hi s Rul e makin g Title 49 ofthe U n ited States Code specifies the FAA 's auth o rit y to i ss ue rules on aviation s afe ty. S ubtitle I , section 106 , describes the authority ofthe FAA Administrato r. "S ubtitle VII: Aviation Programs ," de sc rib es in mo r e detail the sco pe of the Agency's authority. We are issuing this rulemaking und er th e authority describ ed in "Su bt it le 

### VII, Pa1t A, Subpart III , Sec tion 44701: Gene ra l requirements." Under th at sec tion , Congress charges the FAA with promoting safe fli g ht of civil aircraft in air commerce by prescribing regu lat io n s for practices , methods, and procedures the Admi ni strato r fi nds necessary for sa f e t

y in a ir commerce. This regu lation is w ithin the sco pe of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in thi s rulcmaking action. 4

### Regulatory F in ding s We determined that this AD will not have federalism impli cations under Exec uti ve Order 13132. This AD w ill not have a substanti al direct effect on the States , on the relationship between the national government and the States , or on the distribution of power and respon s ibilities among the vario u s levels of government. For the reasons discussed above , 

### J certif y this AD: 

### (1) Is not a "s ig nificant re g ulatory ac tion " under Executive Order 12866, (2) Is not a "s ign ificant rule " under the DOT Regulatory Policies and Procedures (44 FR II 034 , February 26 , 1979) , (3) Will not affect intrastate aviation in Alaska to the extent that it ju stifies making a regulatory dist in ction, and (4) Will not h ave a s i g nifi cant economic impact , positive o r negative , o n a substantial number of small enti ti es under the crite ri a of the Regulatory Flex ibi li ty Act. 

### List of S ubj ects in 14 CFR Part 39 Air transportation , A ircraft , Av iation safety, Incorporation by reference, Safety. 

### Adoption of th e A m e ndment According ly , under the author ity delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: 

### PART 

### 39- AIRWORTHINESS DI RECT IVES 

### l . Th e a uth o rity citatio n for part 39 co ntinu es to r ead as follows: Au th ority: 49 U.S.C. 106(g), 40113 , 44701.



### 5

### § 39.13 [Amended] 2. The FAA amends§ 39
. 13 by addi n g the fo ll ow in g new a i rworthiness d irective (AD): 2015-17-21 Rolls-Royce pic: 

### Amendment 39-18254; Docket No
. FAA-2015-0593; Directorate Identifie r 20 15-NE-08-AD. (a) Eff ective Date T lli s AD becomes effective [INSERT DATE 35 D AYS AFTER D ATE OF P U BLICATION IN THE FEDERAL REGISTER]. (b) Affected ADs None
. (c) Applicability This AD applies to a ll R olls-Royce plc (RR) , RB211-535E4-37 , RB211-535E4- B -37 , and RB211-535E4-C-37 turb ofa n eng in es. (d) Reason This AD was prompted by RR u p dati ng the li fe limits for certain hi gh-p ressure turbine (H PT) disks. We a r e i ssu in g this A D to prevent failure o f the HPT disk, which could result in uncontained disk releas e , damage to the engine , and damage to the airplane. (e) Actions a nd Co mpliance Comply with this AD within the compliance times spec ifi ed , unless already done. (1) Afte r the e ffect ive date of this AD , use RR RB211-535E4-37 , Time Limits Ma nu a l (TLM) : 05-10-01-800-000 , Revision dated July I , 

### 2014 (referred to hereafter as

' the TLM ' ) , to det e rmine the n ew li fe limits for the affected engine mode l s and 6configurations , with the exception of those engine models m e ntioned in paragraph (e)(2) of this AD. (2) For RR RB211-S3SE4

- B-37 or RB2 I 1-S 3SE4

- C -37 engines with an affected HPT di sk that was previously installed on an RB211-535E4-37 e ngine operated under Flight P l an A, use Task 05-00

- 01

- 800

- 000 in the TLM to re-calculate equival ent cycles
s ince new to ob tain the new li fe limit. (3) If a n affected eng in e mode l has an 

### H PT disk insta ll ed wi th part n umb e r (P /N) UL27681 o r UL39767, r emove the affected 1-IPT disk before the accumu lated cyclic l ife exceeds either 19 ,5 00 flight cycles (FCs) under f- l ight Plan A , or 14 , 700 FCs under F l ight Plan B , or within 25 FCs after the etiective date of thi s AD , whichever occurs later. (4) For all affected engines, other than those s p ec ifi ed in paragraph (e)(3) of this AD , remove each HP T disk befo re exceed i ng its applicab le li fe limit as spec ified i n the TLM. (5) Install an HPT disk e l igible for insta llation. ( f) D e finition For the purpose of t hi s AD, a part e li g i b l e for insta ll at ion i s one w ith a PIN li ste d in the T LM with a tota l acc u mu lated cyclic li fe that i s le ss than the applicable life li mit spec ifi ed in the TLM. (g) A ltern a ti ve Method s of C omplianc e (AM O Cs) The Manager , E n gine Certification Office , FAA, may a pprove AMOCs for this AD. Use the p rocedures found in 14 CFR 39.19 to make you r request. You may email yo ur r eq uest to: ANE-AD

- AMOC @ faa.gov.



### 7

### (h) R e l ate d I nform ation (1) For more infonnation abo ut this A D , contact Wego Wang , Aerospace E ngi nee r, Eng in e Certification Office , FAA , Engine & 

### Prope ll er Directorate , 1 2 New E n gla nd E xecutive Park, Burlingto n , MA 0 1 803; phone: 7 81

- 238-7134; fax : 78 1 -238

- 7199; e m ail: wego.wang @ faa.gov
. (2) Refer to M CAI European Av iat io n Safety Agency AD 20 14

- 0249R1 , dated February 18 , 2015 , for more information. You may exam in e th e MCAJ in the AD docket
o n the In ternet at http://www.regulati ons . gov by searchi ng for and loca ting it i n D ocket No. 

### FAA-2015-0593. ( i) Mat e rial Incorporated 

### b y R efe re nc e ( 1) 

### The Director of the Federa l Reg i ste r approve d the i ncorporation by reference (JBR) of the service info r mation listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51
. (2) You mu st use thi s service informati o n as appl ic ab le to do the action s req uired by this A D , un less the AD specifies otherwise. ( i) Ro ll s-Royce plc RB211-535E4-37 , Time Limi ts Manu al : 05-10-01-800-000 , Revision dated Jul y 1 , 

### 2014
. (i i) Reserved
. (3) For RR se rv ice information identified in this AD , contact Rolls

-Royce pic , Cor por ate Commu ni cations , P
. O
. Box 31 , De rby , Eng l a nd , DE24 8BJ; phone: 0 1 1-44- 1332

- 242424; fax: 011-44-1332-249936; emai l: http: / /www
. rollsroyce . co m / co ntact / civil
_ team.j sp ; Internet: https:/ / www.aeromanage r.com ..
8(4) You may view this serv ice inf ormati on at FAA, Eng in e & Propeller D.irectorate, 12 N ew E n g land Execu ti ve P ark, Burling to n , MA. For inform ation on the avai l abil it y of thi s mate ri a l at th e FAA, ca ll 781- 23 8-7125. (5) You ma y v iew this service i nformation at the Natio n a l A rchi ves and R ecords Administration (NA RA )
. For inform at ion o n the availab il ity of this m a terial at NARA,
ca ll 202-741-60 30, or go to: http://www.arc hi ves.g ov/ federal-re g is te r /c fr / ibrlocati ons . htm l
.

I ssued in Burli n gto n , Ma ssac husett s, on A u gus t 2 1 , 2015.

Colleen M. D ' A lessand ro , Directorate Mana ge r , E n g in e & Prop e ll e r Dir ec torate, A ircraft Certil i cat io n Se rv ic e .

9