DEi> ARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CF R Part 39 [4910 -13 -P]

!Docket No. FAA-2012-1327; Directorate Identifier 2012-NE-47-AD; A mendm ent 39-17934; AD 2014-16-10] RIN 2120-AA64 A in vorthine ss Directives; Roll s-Royce pic Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACT ION: Final rule. SUM MA RY: We are supersed in g a irworthines s directive (AD) 2013-12-01 for all RollsRoyce pic 

### (RR) mode l RB211 Trent 768-60, 772-60 , and 772B-60 turbofan engines. AD 2013-12-0 I required a one-time ultra so nic inspection (UI) of low-pressure (LP)
co mpresso r blades with more than 2,500 flight cycles s inc e new or last in spec tion. This AD requires initial and repetitive Ul s of the affected LP compresso r b lades. This AD was prompted by LP compressor blade partia l airfo il relea se events
. We arc iss uing thi s AD to pr

eve nt LP comp resso r blade airfoil sepa r ations, damage to the eng ine , and damage to the
a irpl ane. D ATES: This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. ADDRESSES: for se rvice information ident ified in thi s AD, contact Roll s- Royce pic , P.O. Box 31, Derby DE24 8BJ, UK; phone: 44 0 1332 242424; fax: 44 0 1332 249936. Yo u may view this service information at the FAA , Engi ne & Prope ll er Directorate , 12 New Eng land Execu ti ve Park , Burlington , MA

. For informati on on the avai labi li ty of this material at th e fAA , call 781-238-7125.Exa minin g th e A D Doc k e t You may exam in e the A D docket on the Interne t at http: //www. r egulation s.gov by
searc hin g for and lo cating Docke t No. FAA-20 12 -1 32 7 ; or in person at the Docket Manageme nt Facility between 9 a.m. and 5 p.m. , Monday tlu·ough Friday , except Fede r a l holidays. T he AD docket contains thi s A D , the mandatory continuing airworthiness information, reg ulatory eval uati on , any comments received , and other inf ormation. The address for the Do cke t Office (phone: 800-647-5527) is Document Man age ment Facility , U. S. Department of Transportation , Docket Operation s , M- 30 , We st Building Ground Floor, R oo m W 12

- 140 , 1200 New J ersey Ave nu e SE

. , Washington , D C 20590. 

### FOR FU R THER INFO RM ATION C O NTACT : Robert Green , Aerospace Engine e r, Eng ine Certification Office , FAA , Engine & Propeller Directo rate , 1 2 New Eng land Exec utiv e Par k , Burlington , MA 0 1 803; phone: 781-238-7754; fax: 781-238-7199; email:
robert.green @ faa.gov. 

### SU PPL E ME NTA RY INF ORMAT I ON : Di scu ss io n We issued a notice of proposed rulemaking (NPRM) to am e nd 14 CFR part 39 to
s up e rsede AD 2013-12-01, Amendment 39- 17478 (78 FR 37703, Jun e 24, 20 13 ), ("AD 2013-12-01"). AD 20 13-12-01 appli e d to the specified products

. The NPRM publish e d in the Federa l Reg is t er o n May 23 , 2014 (79 FR 2 9 694). Th e N PRM proposed to require initial a nd rep et iti ve U l s o f the affected LP compressor b lades

. Co mm e nts We gave th e public the opportu ni ty to participate in developing this AD. W e received no comme n ts on the NPRM (79 FR 29694 , May 23, 2014). Co n c lu s i o n We reviewed th e available da ta and dete rmin e d that air safety and the public interest require ado ptin g this AD as proposed

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### Cos t s of Co mpl i an ce We estimate that this AD affects 56 eng ines installed on a irplan es of U.S. reg i stry. We also estimate that it will take about 44 hours per engine to comply with th e initial in spection requirements in this AD. The average labor rate is $85 per hour. Based on these figures , we estimate the cost of this AD on U.S. operators to be $209 , 440. A u th o ri ty for thi s Rul c m a kin g T it le 49 of the United States Code spec ifies the FAA's authority to issue r ules on aviation safety. Subtitle l , Section 106 , describes the authority of the FAA Administrator. S ubtitle V JJ , Aviation Programs, describes in more detail the scope of the Agency ' s authority. We are issuing this rulemaking under the authority described in Subtit le VII , Part A, Subpa rt II I , Section 44701 , "Ge ne ral requirements. " Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regu lat ion s for practic es , methods , and procedures the Administrator finds
nece ssa r y for safety in air commerce. This regulation is within th e s cope of that authority because it addresses an unsafe condition that i s like ly to exist o r develop on products identified in this rulemaking action. Regu l atory F indin gs This AD w ill not have federalism implications under Executive Order 13132. This AD will n ot have a substan tial direct effect on the States , on the relationship between the national government and the States , or on the distribution of power and responsibilities among the various leve ls of government. For th e reaso ns discussed above , I certify that t hi s AD: ( l ) I s not a " significant regulatory act io n " under Executive O rd e r 12866 , (2) I s not a ' ·significant rule " und e r DOT Regulatory Policies and Procedures (44 FR 1 I 034 , February 26, 1979),


### 3(3) Will not affect intrastate aviati on in Alaska to the extent that it justifies making a r egulatory dist in ction, and (4) W ill not have a significant economic impact, positive or negative , on a substantial number of small entities under the c rite ria of the Regu latory Flexibility Act. 

### List of Subjects in 14 CFR Part 39 Ai r transportation , Aircraft , Av iation safety , Incorporation by ref erence, Safety. 

### Adoption of the Amendment According ly , under the authority de legated to me by the Administrator, the FAA amends part 39 of the Federal Aviation Regul at io n s (14 CF R part 39) as follows: 

### PART 39 - AIRWORT HINESS DIRECTIV ES 1. The authority citation fo r part 39 continues to read as fo ll ows: A uthority: 49 U

. S.C

. 1 06(g) , 40113 , 44701. 

### § 39 . 13 !Am ended] 2. T h e FAA ame nd s§ 39.13 by remov i ng a irworthin ess dire c ti ve (AD) 2013

- 12- 01, Ame ndme nt 39-17478 (78 FR 3 7703 , Jun e 24, 20 13 ) , a nd ad d ing th e following new AD: 

### 2014-16-10 Rolls-Royce pic : Amendment 39-17934; Docket No. FAA-2012-1327 ; Dir ec torate Ide nti fier 20 1 2

- NE-47-AD. 

### (a) E ffective Date This A D i s effec tive [IN SERT DATE 35 DAYS AFTER DATE OF PUBLI CATION IN THE FEDERAL REG I STER]. 

### (b) Affected AD s Th i s A D supersedes AD 20 13- 12-01 , Ame ndment 39- 1 7478 (78 FR 37 703 , Jun e 24, 2013).

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### (c) Applicability This AD app li es to Rolls-Royce p i c (RR) model RB 2 1 I Tren t 768-60 , 772-60 , and 772B

- 60 turbofan engines, w ith low-pressure (LP) compressor blade, part numbers (PINs) FK23411 , FK25441 , FK25968 , FW II901 , FWl5393 , FW23643 , FW2:3741, FW23744 , KH23403 , or KH23404 , installed. 

### (d) Unsafe Co nditi on This AD was prompted by LP compressor blade partia l airfo il release eve nts. We
are issuing thi s AD t o prevent LP compressor blade airfoil separat ions, eng in e damage , and damage to the airplane. 

### (e) Action s and Com pli a nce Un less a lready done, do the following actions. 

### (1) Ultraso nic Inspection (Ul) 

### of LP Com pressor Blade ( i

) After the effective date of thi s AD , ultrasonically in spect each LP compressor blade before the blade exceeds 3 , 600 cycles s in ce new (CSN) or before further flight , whichever occurs later. Repeat the U l o f the b lade every 2 ,400 cycles si nce last inspection (CSLT). ( ii ) For any LP compressor blade that exceeds 2,200 CSLI on the effec t ive date of this AD , i n spec t the b lade before exceed in g 3 , 000 CSLI o r before furthe r flight , whichever occurs later. Thereafter, perform the repetitive inspections required by this 

### AD. ( iii ) Use paragraph 3 , excluding subpa ragraphs 3.A.(9), 3.B.(5), 3.C.(4) , 3.D.(3) , 3.E.(5), 3.F.( I O), anci3.G.(7), ofRR Ale rt Non-Mod ificat i on Service Bu ll etin (NMSB) RB.211-7 2-AH465 , elated July 1 5 , 20 1 3 , to pe rf orm the in spections r equi r e d by this AD

. 

### (2) Usc of Replacement Blades L P compressor blades , PINs FK2341 I , FK25441 , FK25968, FW I 190 I , FW15393 , FW23643 , FW23741 , FW 23744, KH23403, or Kl i23404 , that have 

### 5accumulated at least 3,600 CSN or 2 , 400 CSLI arc eligib le for installati o n if the blade ha s pa sse d the U I required by this AD. (f) 

### C r e di t fo r Prev ious Ac ti o n s If yo u p erfo rmed aU T of an affected LP comp r ess o r blade befo r e the effective date of this AD u si ng RR NMSB No. RB.211-72-G7 02, dated May 23, 20 II ; o r RR NMSB No

. RB. 2 li-7 2-G872, Revision 2, date d March 8 , 2 013 , or ear li e r revisions; or RR NMSB No. RB. 21 1-72

- H31 1 , dated March 8 , 20 13; o r Engine Manua l E

- Trent-1RR , T ask 72-31

- 11-200 -806, you have me t th e initial in spec ti o n requ ire m e nt s of this AD. H owever, you mu st st ill comply w ith the repetitive 2,400 CS LI requi re men t o fthi s A D. 

### (g) Alte rn a tiv e Meth o d s of Compli a n ce (AM O Cs) The Manage r, E ngine Certificat io n Office , may approve AMOCs for this AD. Use the procedure s found in 14 CFR 39.19 to make your reques t. 

### ( h ) R e late d In fo rm atio n (1) For more informa t ion about this AD , contact Robert Green , Ae r ospace E ng in ee r, Engin e Cert ification Offic e, FAA , Eng in e & Propeller Dir ec t o rate, 12 New Eng land Execut ive Park , Burlington , MA 0 1803 ; phone: 781-238

- 7754; fax: 781

-238- 7199; email: Robert. Gree n @ faa.gov. (2) Refer to MCAI European Aviation Safety Agency AD 2014-003 1 , dated February 4, 2014, for mo re infom1 ati o n . You may examin e the MCA I in the AD docket
o n th e Intern e t at http: //ww w.regulations.gov /# !documentDetail;D= FAA-20 12-13 27- 0007. 

### (i ) M a t e rial In corp o rate d b y 

### R efer enc e ( 1 ) The Dir ecto r of the Federal R eg ister app roved the incorp o ration by r efere nce (JBR) of the service information li sted in this paragrap h unde r 5 U .S. C. 552(a) and I CFR p art 5 1

.

6(2) You must use th is service information as applicab l e to do the actions required by t hi s AD , u n less th e AD spec i fies othe rwise

. (i) Ro ll s-Royce pic A le r t Non-Modification Service Bu ll eti n No. RB.2 1 1-72- AH465 , dated July 1 5 , 2013. (ii ) Re served. (3) For RR service information id e nt i fied in this AD , contact Ro ll s-Royce pic, P.O

. Box 3 1 , Derby DE24 8B J , UK; phone: 44 0 1 332 242424; f ax: 44 0 1 332 249936. (4) You may view t hi s service info rmatio n at FAA, Engine & P r ope ll er Directorate , 12 N e w England Executiv e Park , Burl i ngton , MA. For information on the
avai labi li ty of thi s mater ia l at the FAA , ca ll 781-238

- 7 1 25. (5) You may view this service informatio n at the National Archives and Records Administration (NARA)

. Fo r i nformatio n on the availabi l ity of this mater i a l at NARA, call 202-741-6030 , o r go to: http://www.a r ch ives.gov/federal-reg ister/cfr/ib rlocations. html.

Issued in Burli ng ton , Massachusetts , on Au g u s t l , 2014.

Collee n M. D ' A lessand ro , Assistant Di recto rate Manager , Engine & Prope ll er Di rectorate , Aircraft Certification Service.



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