### DEPARTMENT OF TRANSPORTATION Fede ral Aviation Administration 14 CFR Part 39 [Dock et 

### No. FAA-2007-28059; Directorate Identifier 2007-NE-13-AD] RI N 

### 2120-AA64 Ainvorthiness Directives; Roll s -Royce pic Tu rb ofa n Eng in es 

### AG E NCY: Fed eral Av iation Administration (FAA), DO T. 

### ACT ION : Notice of proposed rulemaking (NPRM)

. [ 4910-13-P]



### SUMMARY: We propose to s upe rse de an ex is ting airworthi ness directive (A D) for a ll Roll s- R oyce plc (RR) RB211-T ren t 553

- 61 , 553A2

- 6 1 , 556-61 , 556A2

- 61, 5568-61 , 55682-61, 560

- 61 , 560A2 -61 , 768-60 , 772-60 , 772 8- 60, 875- 1 7, 877-17 , 884 -17 , 8848- 17 , 892 -1 7, 8928-1 7 , and 895-17 turbofan eng in es. T he exist in g AD current ly r e quir es in spection of the in te nnediate

- pressure (IP) co mpressor rotor shaft rear balance land for cracks. Since we iss ued that AD , a crack was det e cted in a T re nt 500 lP co mpre ssor rotor
s h aft rear balance land during a s h op v i s it, and furt he r e ngi neering eval uatio n done by 

### RR conc l uded that th e cracking m ay also ex ist in Tre nt 900 engines. Thi s proposed AD would require inspection s of the IP com pre sso r ro tor shaft as required by th e existing A D wh i le a ddin g on - wing i nspections for th e T rent 500 engi nes , an d on - wi ng an d in- shop in spections fo r th e T r e nt 90 0 en g in es. We are p ro p os in g thi s AD to detect crack in g o n the IP comp resso r rotor s h aft rear bal ance land , w hi ch co uld lead to uncontained e n g in e fa ilu re and d ama ge to th e airplane. 

### DAT ES: W e must receive comm e nt s o n thi s p ro p ose d AD by [INS E RT D A TE 60 DAYS AFTER DATE OF P UBLICATI O N IN THE FEDERAL RE GI STER]. 

### ADDRE SSE S: You may se nd co mments, using th e proc edure s fo und in 14 CFR 11. 43 and 11 .45 , by an y of the fo ll owing methods:• Federal eRulemaking Portal: Go to http: //www.re gu lati on s .gov. Follow the instructions for s ubmi tting comments.
• Fax: 202-493-2251.
• Mai l : U.S

. Department of Tran spo rtation , Docket Operations, M-30 , West Building Ground Floor , Room Wl2-l40 , 1200 New Jersey Avenue SE., Washington , DC 20590.
• Hand Deliv ery: Deliver to Mail ad dres s abov e between 9 a.m. and 5 p.m. , Monday through Friday , except fede ral hol idays. For service information identified in this AD, contact Rolls

- Royce pic, Corporate Communications , P.O. Box 3 1 , Derby, Eng land , DE248BJ; phone: 

### Oil 44 1332 242424; fax: 0 11 44 13 32 2454 1 8; ema il : http://www.rolls-royce.com/contacts /civil team.jsp. You may view this service information at the FAA, Engine & Prop e ller Directorate, 12 New England Execut ive Park , Burlington, MA. for information on the availability of this materi a l at the FAA, ca ll 78 1- 238-7125. 

### Exa mining the A D Docket Yo u may examine the /\0 docket on the In ternet at http:/ / www.regu l ations.gov;
or in person at the Docket Management facility between 9 a.m. and 5 p.m. , Monday through Friday, except Federal holidays. The AD docket contains this proposed AD , the regulatory evaluation, any comments received and other information. The str eet address for the Docket Office (phone: 800-647

- 5527) is in the ADDRESSES section. Comments wi ll be avai l ab le in the AD docket short ly after receipt. 

### FO R FU RTHE R INFORMATION CONTACT: Frederick Zink , Aerospace Engineer, Engine Certification Office, FAA, Engine & Prop e ller Dir ectorate, 12 New Eng land Executive Park , Burlington, MA 01803; phone: 781-238

- 7779; fax: 781

- 238-7199 ; ema il: frederick.zink (ci), faa.gov.

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### SUPPLEMENTARY INFORMATION: Com ment s Invited We invite you to se nd any written relev ant data, views, or arguments about this proposed AD. Send you r comments to an address li sted under the ADDRESSES section

. Include "Docket No. FAA-2007-28059 ; Dir ectorat e Identifier 2007

- NE-13

- AD" at the beginning of your comments. We specifically invite comments on the overall regulatory , economic, environmental , and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD because of tho se comments. We wi ll post all co mm ents we receive, without cha n ge , to http: //www .regul a tion s .g ov, includin g any personal information you provide. We will also post a report summarizing each subs tanti ve verbal contact we receive about this proposed AD. 

### Discussion On May 15,2012, we iss ued AD 20 12- 10-12 , Amendment 39-17061 (77 FR 3 1176 , May 25, 2012), for all RR RB211-Trent 553-61, 553A2-61, 556

- 61, 55 6A2 -6 1 , 5568-61, 556B2-61, 560-61, 560A2-61, 768-60 , 772

- 60, 772B-60, 875-17 , 877 -1 7 , 884- 17 , 8848-17 , 892-17, 892B-17 , and 895-17 turbofan engines. Th at AD requires continuing initial inspections, add in g add itional inspections, and a mandatory terminating action. That AD resulted from reports of add iti onal cracking o n RB211- Trent 700 and RB21 1

- Trent 800 IP compressor rotor shafts. We issued that AD to detect cracking on the IP compressor rotor shaft rear bal ance land , which cou ld l ead to uncont ained engine fail ure and damage to th e airplane. 

### Ac tion s S ince Ex i stin g AD Was Issued Si nce we iss ued A D 2012-10-12, Amendment 39- 1 7061 (77 FR 31176, May 25, 20 12), a crack in a T rent 500 JP compressor rotor shaft rear balance land was detected 

### 3during a shop vis it. Furth e r engineering evalu ation, d one b y RR , concluded that the
crac kin g may al so exis t in Tre nt 900 eng in es. 

### Relevant Service Information We rev iewed RR N on -Modificatio n Alert Service Bulletin (NMASB) N o. RB.211-72-AH058 , dated De cem ber 1 3,20 12, and RR NMAS B No. RB .21 1-72-AH059 , dat e d D ece mber 11 , 20 12

. NMASB No. RB.211-72-AH058 d es crib es proc ed ures fo r in spe ction of RB 2 l l

-Trent 55 3-6 1 , 553A2-6l, 556-61, 556A2-6 1 , 556 B- 61, 55 6B2 -61, 560 -61 , and 560A2-61 e n g in es. NMASB No. RB .2ll

- 72

- A H 059 de sc ribes p r ocedur es for insp ec tion o f RB211-Trent 970 -8 4 , 970B-84, 972 -8 4 ,972 8-84 ,97 7-84 , 97 7B -84, and 980-84 e n gi nes. 

### FAA's Determination W e are propos in g th is A D b ecau se we e valuate d all th e re levan t in fo rmation and detennined the un safe condition described prev iously i s likely to exist or deve lop in o ther products of the sa me type design. 

### Proposed AD Requirements This propo sed AD would retain a ll the require ments of A D 20 12- 1 0 -1 2, Amendment 39- 1706 1 (77 FR 3 117 6, May 25, 2 0 12). Thi s proposed A D wou ld add requirements to perform o n-win g in spec tion s fo r the T re nt 500 and on - w in g an d in-shop in s pec tion s for the Trent 900 e n g ines. 

### Costs of C ompliance We est im ate that this proposed A D woul d affect about 136 eng ine s i ns talled on airplane s of U.S. regi st ry. We a lso estimat e tha t it wo uld take about 14 hour s per e ng ine to perform required in spec ti ons. The average labor rate is $85 per hou r. Replacement parts are es tim ated to cost about $2,27 1 per eng ine. Based on these fig ures, we estimate th e cost of the proposed A D on U.S. operators to be $ 4 70,696.



### 4Authority for this Rulcmaking Title 49 of th e United States Code specifies the FAA's authority to i ss ue ml es on aviation safet y. Subtitle I , Section 106 , describes the authority of the FAA Ad mini s trator. Subtitle V II , Aviation Programs , describes in more detail the scope of the Agency's authority. We are issuing this rulemaking under th e authority described in Subtitle VII , Part A , Subpart 

### Ill , Section 44701, " Gen e ral requirements. " Under that section, Congress charges the FAA with promoting safe fli ght of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds
nec essary for safe ty in air commerce. This regulation is within the scope of that authority becaus e it addresses an unsaf e cond i tion that is likely to exist or develop on products ident i fied in this rulemaking action. Regulatory F inding s We have detennine d that this proposed AD would not have federalism imp li cations under Executive Order 13 1 32. Thi s propo sed AD would not have a
s ub stant ia l direct effect on the States , on the relationship between the national Go ve rnment and the States, or on the distribution of power and re s ponsibilities amon g the various levels of government. For the r easons d iscussed above , I certify that the proposed regulation: ( 1) I s not a "sig nificant regu latory action " under Executive Order 12866 , (2) Is not a "sign ifican t rul e" und e r the DOT Regulatory Policies and Procedures (44 FR 11034 , February 26, 1979 ), (3) Will not affect intrastate av iation in Alaska, to the exte nt that it just ifi es making a regul atory distinction , and (4) Will not hav e a significant economic impact , p os itive or negative , on a substant ia l number of small entities under the criteria of the Regulatory Flex ibility Act.
5List of Subjects in 14 CFR Part 39 A i r transportation , Airc raft, Aviat ion safety, Incorporation b y reference, Safety. The Proposed Amendment Accordi n g ly , under the authority delegate d to m e by the Administrator, th e FAA proposes to amend 14 CF R part 39 as follows: PART 

### 39
- AIRWORTIDNESS DIRECTIVES 1. The authority citation for part 39 continues to r ead as follow s: Authority: 49 U.S.C. 106 (g), 40113,44701. 

### § 39.13 [Amend ed ] 2

. Th e FAA a m e nd s§ 39. 1 3 by r emoving a irwo 11hines s directive (AD) 2012-10- 1 2, Ame ndm ent 39-17061 (77 FR 3 117 6, May 25, 20 12), and adding the following n ew AD : Roll s -Royce pic : Docket No. FAA-2007-28059 ; Directorate Id entifier 2007-NE-1 3-AD. (a) Comments Due Date T h e FAA must receive comments o n this AD ac tion by [INSERT DATE 60 DAYS AFTER DATE OF PUB LICAT ION IN TH E FEDERAL REG I STER]. (b) Affected ADs This A D s up e rse des AD 20 12- 10

- 12, Amendme n t 39-17061 (77 FR 31 176 , May 25, 20 12). 

### (c) Applicability This AD app li es to Rolls-Royc e pic (RR) RB2 11-Tr e nt 553-6 1 , 553A2

- 6 1 , 556- 6 1 , 556A2 -61 , 5568-6 1 , 55682-61 , 560-61, 560A2-61 , 768

- 60, 772-60 , 772B -6 0, 875- 17,877 -17 , 884-17 , 884 B-17 , 892-17 , 8 92 B- 17, 895-17,970-84 , 970B-84, 972-84 , 972B84, 977 -84 , 977B-84 , and**9~0-84** tu rbofan engines.

6( d) U n safe Co n diti o n This AD was prompted by detection of a crack in a Trent 500 interm e diatepres s ur e ( IP ) compressor rotor s haft rear balance land w ith follow-on RR engi neerin g
eva luatio n concluding that cracking may a lso exist in Trent 900 engines. W e are is s uing this AD to detect cracking on the IP compressor rotor shaft rear b alance land, which could lead to uncontain e d engine failure and dama ge to th e airplane. (c) Co mpli a n ce Comp ly with thi s AD w ithin the co mpli ance t ime s spec ifi ed, unless a lready done. (f) R B21 1- T re nt 7 00 Seri es E ng in es - Re ar Ba l an ce La nd I n s p ecti ons (1) Within 625 cycles-in-service (C IS) after June 29,20 12, o r before th e next flight afte r the ef fectiv e date of thi s AD , whichever occurs later, borescope inspect th e IP
co mpressor rotor s haft rear bal ance land. Use RB 2 ll Tre nt 700 Series Propulsion Sys tem No n-Modific atio n Alert Serv ice Bulletin (NMASB) No. RB.211- 72-AG270, Revision 4, dated March 2 1 ,2 011 , se ction s 3 .A.(2)(a) through 3.A.(2)(c) and 3.A.(3)(a) tiU"ou g h 3.A.(3)(c) for in-shop procedures , or 3.B.(2)(a) through 3. B .(2)(c) and 3.B.(4)(a) tlU'ough 3.B.(4)(c) for on-wing procedure s, to do the in s p ection. (2) Th e reafter , repeat th e inspection within eve ry 625 cycles-since-last inspection (CSLI). You m ay count CS LI from the last borescope in spec tion o r the last eddy cur re nt inspe ctio n (ECI), whichever occurred la s t. (3) At each s h op v isit after the effective date of this AD , perform an EC I and
v i sually inspect the IP compressor rotor shaft rear ba l ance land, and visually inspect the balance weig hts. Use RB211 T re nt 700 and Tre nt 800 Series Pro pul sion Sys tems NMASB No
. RB.211-7 2-A G08 5, Re vis io n 2, dated July 7 , 2011, sec tion s 3.A

. thro u gh 3.C., to do th e inspections.

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### {g) RB211- Trent 800 S eries E n gin es - R ea r B a la nc e La nd In s pection s ( I ) Within 475 C IS after June 29,2012, or b efo re th e next fli g ht afte r the effect i ve date of this A D , whichever occurs later, borescope inspect the TP compressor rotor shaft
rear balance land. Use RB211 Tren t 800 Series Propulsion System NMASB No. RB. 2 11- 72

- AG264, Rev is ion 5, dated March 2 1 , 2011 , sec tions 3.A.(2)(b) throu gh 3.A.(2)(c) and 3.A.(3)(a) through 3.A.(3)(c) fo r in- sho p procedu res, or 3.B.(2)(a) through 3.B.(2)(c) and 3. B. (4)(a) through 3.B.(4)(c) fo r on-w in g procedures, to do the in spection. (2) Thereafter, repeat the in spection with in eve r y 475 CSLT. You may count CS LI from th e las t borescope in s pection or the l ast EC I , whicheve r occurred last. (3) At each shop visit, perform an EC I and visua ll y in s pect th e IP co mpre ssor
rotor shaft rear balance land , and v isually inspect the balanc e we ights. Use RB211 Trent 700 and Trent 800 Seri es Propul s i o n Systems NMAS B No. RB.2 11 -72-AG085 , Revi s ion 2, dated July 7, 20 II , sect ions 3.A. through 3

. C. , to do th e in spec tions. 

### ( h ) RB211-Trent 500 Series E n gines

- Rear Bal a nce Land In spectio n s (I) Within 340 C IS after th e effective elate of this AD , borescope inspect the IP compres s or roto r shaft rear balance land

. Use RB2 11 Trent 500 Series Propulsion Systems NMASB No. RB.211

- 72-A H058, dated D ecember 13 , 20 12, sections 3.A.(2)(a) tlu-oug h 3.A .(2)(c) , 3.A.(3)(a) through 3.A.(3)(d), and 3.A.(5)(a) through 3.A.(5)(c) for on-wing procedu res, to d o th e inspection. (2) Thereafter, repeat the inspection w ithin every 340 CS LI. You may count CS LI from the last borescope i nspection o r the last EC I, whi chever occ urred l ast. (3) At each shop vis it, p erform an EC I and visually i nspec t the 

### IP compressor rotor s haft rear bal ance land, and v isually in spect the balance weights. Use RB211 Trent 500 and Trent 900 Series Propulsion Systems Non-Modification Service Bulletin (NMSB) No. RB. 21 1-72-G448, R ev isio n 3 , elated July 7 , 2011, section s 3.D.(4) tlu-ough

83.0.(5) , 3.D.(6)(t) through 3.D.(7)(w), 3.D.(8)(t) through 3.D.(8)(w), 3.0.( 1 1), and 3. 0 .(12) , to do the i n spections. 

### (i) RB211 -Trent 900 Serie s E n g in es - Rear Balance Land In s pection s (l) W ithi n 280 fl ight cycles after the effec ti ve date of this AD , borescope inspect the IP compressor rotor shaft rear ba lanc e land. Use RB2ll Tre nt 900 Series Propul sio n Systems NMAS B No. RB.2 11 -72

- AH059, dated December 1 1 ,2 012 , sect ions 3.A.(2 )(a) through 3.A.(2)( c) , 3 .A .(3)(a) throu g h 3.A.(3)(d) , and 3.A.(5)(a) th rough 3.A.( 5)(c) , to do the in spec ti o n. (2) T hereafter, repeat the in spect ion with in every 280 CSLI. You may count from the l ast borescop e in s p ec ti o n or th e last EC I , w hi c h ever occ urred last. (3) At each shop v isit aft e r the effect ive da t e of this A D , perf o rm an ECI and visually inspect the IP compressor rotor shaft rear balance land, and v isua ll y in spect the balanc e we ights. Use RB21 1 Tre nt 500 and Tre nt 900 Serie s Propu l sion Syste ms NMSB No. RB .2ll-72-G448, Revision 3, dated Ju ly 7, 20 11 , sections 3. 0. (4 ) through 3.0.(5) , 3.0.(6)(1) thro ugh 3.D.(7)(w), 3. D .(8)(f) throu g h 3.0.(8)(w), 3.0.(1 1 ) , and 3. 0.(1 2), to do the in s pection. 

### (j) 

### Ma ndato ry Termination Action fo r RB211 -Tre nt 700 a nd RB211- T rent 800 E n g in es ( 1 ) For RB 2 1 1

- Trent 700 engi nes. At th e next shop v is i t in w h ich any level of inspection or strip is sc hed uled to be carried out o n the I P co mpre ssor, remove the
ex ist i ng IP co mpressor balance weigh t s. (2) For RB 21 1

- Trent 800 e ngines. At the next shop v is it in whi ch any level of inspection or strip i s sc heduled to be car ri ed out on the IP compressor, remove the
ex i sti ng IP compressor balance weig ht s . (3) O nc e you have remov ed the bal ance we i gh t s, do not r e- in stall the m on any IP compre sso r s haft rear ba lance land. 

### 9

### (k) Credit for Previou s Action s (1) 

### For RB211-Trent 700 series engi nes : (i) I f you bore scope inspected your RB211- Trent 700 series engine using RB211 Tre n t 700 Series Propul s ion System NMASB No. RB.211

- 72-AG270, R ev is ion 1 , dated December 14, 2009, or Revis ion 2, dated Dece mb er 2 1 , 20 1 0, or Revision 3, dated February 25,20 11 , before the ef fecti ve date of thi s AD , you have satisfi ed the requirements of parag raph (f)( I) of this AD. (ii) 

### If you performed the 

### EC I and visual inspec tion of yo ur RB2ll- Trent 700 series engi nes usin g RB211 Tre nt 700 and Trent 800 Se ries Propu lsion Systems NMASB No. RB.211-72

- AG085, Revisi on I , 

### dated Septe mber 27,20 1 0, before the effective date of this AD, 

### you have satisfied the 

### EC I a n d visual in spections r eq uired by paragraph (f)(3) 

### of thi s AD. 

### (2) For RB211- Trent 800 series engines: (i) I f yo u borescope in spec ted your RB211- Trent 800 serie s engi ne using RB211 Trent 800 Series Propuls ion System NMA S B No. RB. 2 11-72-AG26 4 , Revision 3, dated D ecember 2 1 ,2 010 , or Revision 4 , dated Feb ruary 25 , 20 11 , befo re the effective date of this AD , you have satisfied the requirements of paragraph (g)(l) of this AD. (ii) 

### If you perfo rmed the 

### EC I and in -s hop visual inspection of your RB211- T re nt 800 series e n g ines us in g RB211 Tre nt 700 and Tren t 800 Series Propulsion Sys tem s NMASB No. RB.211-72-AG085 , Rev ision I , 

### dated September 27, 2010, before the effective d ate o f this AD, yo u have satisfied the 

### ECI a nd visual in s pection s required by paragraph (g)(3) of thi s AD. (3) For RB211

- Trent 500 and 900 series engines: ( i

) If you performed the 

### EC I of you r RB2 11 -Trent 500 series engines usin g RB211 Trent 500, 700 and 800 Series Propulsion Sys tems NMASB No. RB.211-72- Af260, Rev is ion 4, d at ed Ju ly 28 , 2009, and RB21 1 Trent 500 and Trent 900 Series 10Propulsion Systems N MSB No. RB. 211-72-G448 , Revision 2, dated December 23, 20 10 befo r e the effec tive da t e of this AD, you have satisfied the EC i s requir ed by paragraph (h)(3) of t his AD. ( ii) If you p e rformed the in- s hop visual in s p ec ti o n of yo ur RB 2 11- Trent 500 series engines u sing RB211 Trent 500 and T rent 900 Series Propul sio n Syste m s NMSB No. RB.211-72-G448 , Rev is io n 2, dated D ece mb er 23 , 20 I 0 , before the effective date of thi s AD , you h ave satisfied the in-shop v is ual inspections required by p aragrap h (h)(3) of thi s AD. (I) Definitions For the purpo se of this AD , a s hop vi s it i s defined as introduction of an engine into a s hop and di sasse mbl y suffici e nt to ex pose the IP co mpressor m odu l e rear face. (m) Alternative Methods of Compliance (AMOCs) T he Manage r , E ngine Ce rtificat ion Office , F AJ\, m ay approve AMOCs for th is AD. Use the pro ced ures in I4 CFR 39 .1 9 to mak e your req uest. (n) Related Information (I) For m ore information about th is AD, contact f-rederick Z in k , Aer ospace E ngineer, E n g ine Certi ficat ion Office , FAA , Engine & Prope ller Dir ec to rate, 12 New En g land Executiv e Park, Burlin g to n , MA 01803 ; phone: 78 1-238-777 9; fax: 781-238- 7 1 99; email : fred e r ick.zink @ faa.gov. (2) European Aviati on Safe ty Age ncy AD 2013-0002, dated January 4, 20 1 3 a l so pertains to the s ubj ect of this AD. (3) For service information identified in th is AD, co nt act Roll s- R oyce plc , Corpo rate Commu ni cations, P.O. Box 3 1 , Derby , England, DE248BJ ; phone: 011--44- 1 332-242424; fax: 0 1 1--44-1332-245418; Inte rn e t: http://www.rollsroyce . com/co nt ac t /civi I_team.j sp.

II(4) You may view the referenced service information at th e FAA , Engine & Prope ll er Directorate, 12 New England Executive Park , Burlington , MA 01803. For information on the availability of this material at the FAA, call 781-238-7 125.

Issue d in Burlington, Ma ssachuse tt s, on March 13 , 2013.

Colleen M. 0' A lessandro, Assistant Manager, Engine & Pro p elle r Directorate , A ircraft Certification Serv ice.

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