### DEPARTMEN T OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2014-0940 ; Direc tora te Identifi er 2014-NE-15 -A D] RIN 2120-AA64 4910-13-P]

Airworthiness Directives; Lycoming E n g ine s Reciprocatin g En g ine s (Type Certificate prev iou s ly held by Textron Lycoming Divi s ion , AVCO Corporation) AGENCY : federal Aviation Adm in istration (fAA), DOT. 

### ACTION: Notice of proposed rulemaking (N PRM)

. 

### SUMMARY: We propose to adopt a new airwo rthi ness directi ve (AD) for certain Lycomi n g T I 0-540-A .I 1 A reciprocatin g e ngine s. This proposed AD wa s p r o mpted by
seve ral repo rts of cracke d e ngine ex h aust pipes. This proposed AD wo uld require in spection of the e n g in e exhaust pipes for cracks and replacement of the tu rbocharger mounting bracket. We are proposing thi s A D to prevent fa il ure of the ex hau s t sys te m clue to cracking , w hi ch cou ld lead to uncontro ll ed e ng ine fire, harmful exhau st gases ente ri ng the cab in r es ultin g i n c rew incapacitation , a nd damage to the a irplan e. 

### DATES: We mu s t r ece i ve comment s on thi s proposed AD by [ lN SE RT DATE 60 D AYS AFTER DAT E OF P UBLICAT ION I N THE Federal Reg is t e r]. 

### ADDRESSE S: You may send comments , u si ng the procedures found in 14 CFR 11.4 3 and 11.45, by any o f the following me thods:
• Fede ral eRulemaking Portal: Go to http :// www.regulation s . gov . F ollow the in s tructi ons fo r s ubmittin g comments.
• Fax: 202-493

- 2251.
• Mail: U.S. Department ofTransportation, D ocket Op e rat ions , M-30, West Building Ground Floor, Room W 1 2- 140 , 1200 New J ersey Avenue SE. , Washi ngton , D C 20590.

### • Hand Delivery: Deliver to Mail add r ess above between 9 a.m. and 5 p.m. , Monday through Friday , except Federal ho li days

. For serv i ce information identified in this proposed AD , contact Lycoming Engines , 652 O li ver Street , Williamsport , PA 177 01; phone: 800-258-3279; fax: 570

- 327-7 1 0 1 ; Intern e t: www.lycOJping.com/Lycoming/SUPPORT / TechnicalPublications/ServiceBulletins.aspx. You may view this service infom1ation at the FAA, Engine & 

### Propeller Directorate, 12 New England Executive Park , Burlinf,rton , MA. For information on th e availability of this material at the FAA , ca ll 78 1 -238-7125. Examining the AD Docket You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and lo catin g Docket No. FAA

- 20 1 4

- 0940; 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 street address for the Docket Office (phone: 800

- 647

- 5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Norm Pe renson , Ae r ospace Eng ine e r, New York Aircraft Certification Office, FAA , Engine & 

### Propeller Directo rate , 1600 Stewart Avenue , S ui te 410 , Westbury , NY 11590; phone: 516-228-7337; fax: 516-794- 5531 ; email: nonnan.perenson @ faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to send any written re l evant data , views, or arguments about this NPRM
. Send your comments to an address li sted under the ADDRESSES section. Include " Docket No. FAA-2014-0940; Directorate fdent ifier 20 14

-NE

- 15-AD " at the begi1ming of your comments. We specifically invite comments on the ove ra ll regulatory,

### economic , environmental, and energy aspects of tllis NPRM. We will consider all comments received by the closin g date and may amend this NPRM because of thos e comments. We will post all comments we receive, without change , to http: //www.regulations.gov, includin g any personal infonnation you provide. We will also post a r epott summarizing each s ub stantive verbal contact we rec eive about this NPRM. Discussion We issued Special A irworthine ss Information Bulletin (SATB) CE-04-22 on December 17 , 2003. The SAIB recommended pre-flight and r epet itive inspection of exha u st system components for signs of cracking. This NPRM was prompted by additional reports of ex hau st pipe cracking. Probable causes of exhaust pipe cracks are questionable exhaust pipe welds or misalignment of the exhaust pipe during ins ta llation. Additionally , non-conforming turbocharger mounting brackets were found during Lycoming engine assembly trials of new eng in e exhaust pipes. These out-of-tolerance mounting brackets may place stresses on exhaust system components. Taken a lone , or in combination, these conditions may overstress certain exhaust pipe locations and cause cracks to develop. With the presence of cracks, hot exhaust gases collect in the eng ine compartment and carbon monoxide gas i s now able to enter the airplane cabin. The conditions identified above , if not corrected , could result in uncontrolled engine fire, ham1ful exha u st gases entering the cabin resulting in crew incapacitation , and damage to the airplane. Relevant Service Information We reviewed Lycoming Eng ines Mandatory Service Bulletin (MSB) No. 614A , dated October I 

### 0 , 2014. The MSB describes procedures for exhaus t system in spect i on and turbocharger mounting bracket replacement. '

### FAA's Determination We are proposing this NPRM because we evaluated all the relevant information and determined the unsafe condition described previously i s likely to ex ist or develop in oth er products of the same type design. 

### Proposed AD Requirements This NPRM would require inspection of the exhaust system and replacement of the turbochar ger mounting bracket. 

### Costs of Compliance We estimate that this proposed AD would affect about 111 engines installed on airplanes of U
. S
. registry. We also estimate that it will take about 8 hours per engine to comply with this AD. The average labor rate is $85 per hour. Parts replacement will cost about $6 , 782 per engine. Based on these figures, we estimate the cost of this proposed AD on U.S. operators to be $828 , 282. Our cost estimate is exc lusiv e of possible warranty coverage. 

### Authority for this Rulemaking Title 49 of the United States Code specifies the FAA ' s authority to issue rules on aviation safety. Subtitle I, section 106 , describes the authority ofthe FAA Adm inistrator. S ub ti t le VII: Aviation Programs, describes in more detail the scope of the Agency ' s authority. We are issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart 

### Til, Section 44701: " General requirements." U nd e r that section , Congress cha r ges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices , methods , and procedures the Administrator finds necessary for safety in air commerce. This regu lation is within the scope of that authority because it addresses an un safe condition that is likely to exist or develop on products identified in this rulemakin g action.

### Re g ulato ry Findin gs We determi ned that t hi s proposed AD wo uld n o t have fe derali sm implicatio n s unde r Executive O rd er 1 3132
. T hi s proposed AD wo uld n o t have a s u bstantia l d irect effec t o n th e States , on the re lationshi p betwee n the natio n al Govenunent and the States , or on the d is tri bu ti o n of power and res p onsi bil ities among the vario u s levels of governme nt. Fo r the reaso n s discusse d above , I certi fy th is proposed regulat ion: ( 1) Is not a " s i gn i ficant reg ul ato r y ac ti o n " u nd e r Exec ut ive O rd e r 12866 , (2) I s not a " sign i fica nt ru l e" und e r th e D OT R eg ul ato ry P olicies and P roce d ures (44 F R 1 1034, Fe b ru ary 26, 1979), (3) Wi ll not affec t i ntrastate aviatio n in A l as ka to the exte nt th at it ju s ti fies
m aki ng a reg ul atory disti nction , and (4) W ill not have a s ig ni ficant eco no mi c impact, pos iti ve or negative, o n a
s ub stantial numb er of small e nti t ies und e r th e criteria of th e R eg ul ato r y Flex ibi lity Act. 

### Li s t of S ub.jects in 14 C F R Part 39 A ir tra n spo r tat i on , A irc raft, Av iation safety, Inco r po r ati o n b y refe r e nce , Safety

. 

### The Propo s ed Amendment Acc o rd i ngly , u nde r the au thori ty de legate d to me by t he A dmin istrato r, th e FAA proposes to a me nd 14 CF R part 39 as f o ll ows : 

### PART 39 -AIRWORTHINESS DIRECTIVES 1 . T h e au thori ty c itation fo r part 39 co ntinu es to read as fo ll ows : Authori ty: 49 U.S.C. 106(g) , 40 11 3 , 4470 1. 

### § 39 . 13 [Amended! 2
. T h e FAA a me nd s§ 39 .1 3 by ad din g th e fo ll owi ng new airworth iness d irect ive (A D ) :

### Lycoming Engines (Type Cert ificate previou s ly he l d by Textron Lycoming Divi s ion, AVCO Co rporation) : 

### D ocket No. F AA-20 14-0940 ; Dir ecto rate Identifier 20 14-NE-15

- A D

. (a) Comments Due Date 

### W e mu s t r ece i ve comments by [INS ERT DAT E 60 DA YS A FTER DATE OF PUB LI CATION I N THE Federal Re g ister]. (b) Affected ADs 

### None. (c) Applicab ili ty 

### This AD ap pli es to all Lyco min g TJ0-540-A .J IA r eciprocatin g engines listed by eng in e s eria l numb er (SIN) in Fi g ur e I to paragraph (c) of this AD an d to any TI0

- 540- AJ 

### IA reciprocating eng in e with a replacement turbocharger mounting bracket in sta ll ed that wa s purchased betwee n A pril 5 , 2012 an d May 29 , 2014. qgure lt p 0 

### aragra p1 c - h () L 

### ycommg ngme 

## - - ec e E
. 

### TIO 540 AJlA Aft t 

### d SIN Eng i ne SIN E ngine S/N Engine S/N Engine SIN 

### L-6748-61 E L-13828-61 E L-1 3832-6 1 E L-13843

- 61E L

-1 3 8 1 7-61 E L-13831-61 £ L -1 3833-6 1 E L

- 13 84 7-61 E L-1 38 19-6 1 E L-13823-61 E L-13839-6 1 E L-13855-61 E L- 13856 -61 E L-13947-61 E L- 140 I 1-6 I E RL-2551-61 E L- 1 385 7-61 E L-13948-61 £ L

- 140 1 3-6 1 E RL-2848-61 E L- 1 3866-6 1 E L-13949-61 E L

- 140 14-61 E RL-3450-61 E L-1 3867-6 1 E L-13950-61 E L- 140 1 5-6 1 E RL-4138-61 E L- 1 3873-61 E L-1 3960

- 61 E L-140 I 7-61 E RL-7243-61E L-13882

- 61 E L-13961-61£ L-14024

- 6 1 E RL-7512- 6 1 E L-13883-6 1 E L- 1 3962

- 6 1£ L-1 4025

- 6 1 E RL-843 5- 6 1 E L-13884-6 1 E L-13967-61£ L

- 14026-61 E RL-8767 -61 E L- 13885-6 1 E L

- 13973-61 E L- 1 4028-61 E RL

- 89 14

- 61 E L-1 3886 -61 E L-13975- 6 1 E L-14034-61 E RL -8 979-61 E L- 1 3895-6 1 E L-13976-61 E L

- 1

4054-6 1 E RL-9399-61 E L-13896-61 E L-13979-61 E L-1 4055-6 1 E RL- 9466-6 1 E sL-13898-61 E L

- 13981-61 E L-14056-61 E RL-9618-61 E L-13900-61 E L-13983-61 E L-14057-61£ RL-9663

- 61£ L-13902-61 E L

- 13984-61 E L- 1 4062-61 E R L-1 0098-6 1 E L-13907-61 E L- 1 3993-61 E L-14063-61 E RL-1 0194-61 E L-1391 3 -61 E L-13996-61 E L-14066-61 E RL-1 0249-61 E L-1 3915-6 1£ L-13997- 6 1 E L-14067-61£ RL-1 0615-61£ L-1 3930-61 E L

- 13998-61 E L- 14069-6 1 E RL-11011-6 1 E L-13 93 1-61 E L

- 13999-61 E L-14071-61 E RL-12121-61 E L

- 13934-61 E L-14000-61 E L-14076-61 E RL-12163

- 61£ L-13936-61 E L- 1400 l -61 E L

- 14077-61 E RL-12343

- 61 E L

- 13938-61 £ L-14003-61 E RL-1726-61 E RL-13352-61 E L

- 13939-61 E L

- 14004-6 1 E RL-181 0-61 E RL- 1 3601-61£ L-13946-61 E L-14005-61 E RL-1862-61 E 

### ( d ) U nsa f e Co nditi on Thi s AD was prompted by several r epo rts of cracked e ngin e exhaust pipes. We
are issuing thi s AD to preve nt failure of the exhaust system due to cracking, wh ich cou ld lead to uncontro ll ed e n gi ne fire , h ar mful exha u s t gases entering th e cab in res ulting in
c rew incap acitation , and dam age to th e airp l ane. (e) 

### Co mpli a n ce Comply with this AD with in th e co mpliance times spec ifi e d , un l ess al r eady clone. 

### (1) For affected engines with an S/N l is ted in Figure 1 to p ara g rap h (c) of t hi s AD wi th 400 h o ur s or less time since new (TSN) or time s ince la s t overhaul ( TSLO), and for any TI0-540-AJ I A rec ipro ca ting eng in e with a r ep lacement turbocharge r mounting bracket in s t alled that was purcha sed between April 5, 2012 and May 29 , 20 1 4 , that has accumulated 400 hours or less time-in-service (T IS), within 25 hours after the effective elate of this AD , re p lace t he tu rboc h arger mounting bracket with a part elig ib le for installati o n , and inspect the exhaust pipes for cracks. Use L yco min g Eng ines Mandato ry Service Bulleti n (MS B ) No. 614A , dated October I 0, 2014, Exhaust System Disa ssemb lyand R e m ova l , paragraphs 1 through 22 to re plac e th e bracket , and Exhaust System In spect io n , par agrap hs l through 5 to do th e in spec tion. (2) For affected eng i nes wi th an SIN li s t e d in f- ig ure I to p a ragraph (c) of thi s AD wi th m o re than 400 hours TSN or TSLO , and for any T I 0-540-A J I A reciprocating engine w ith a re pl ace m e n t turbocharger mountin g bracket in sta ll ed that was purcha se d between April 5, 20 1 2 and May 29 ,2 014 , that h as acc umul a t ed m ore than 400 hours TI S,
re plac e th e turb oc harger mounting bracket wi th a pa rt e li g ible fo r in stallation , and inspect th e ex h aus t pipe s for cracks at the n ext eng in e overh a ul , sepa r ation of th e c rankcase h a lves , o r twe lv e years from th e effec ti ve dat e of thi s AD , w hi c h eve r co m es fir s t. Use Lycoming E ngin es MSB No. 614A , dated October 10 , 2014, Ex haust Sys tem Di sassem bl y a n d Removal , para graphs 1 through 22 to rep lac e th e bracket, and Exhaust Sys t e m Inspection , paragraphs 1 thro u g h 5 to do the in spec tion. (f) In sta ll a tion Prohibition After th e effective date of this AD, do n ot re turn to serv ice any eng in e with a T I0 -540-A J I A turbocharge r mountin g brack e t that was r e moved from an e n g ine id e n t ifi ed in Figure I to paragraph (c) of th i s A D o r th at wa s purchased b etwee n April 5 , 20 1 2 a nd May 29,20 1 4. (g) C redit for Previous Action (I) If, belo re the ef f ecti ve d ate of thi s AD , yo u r ep laced the turbochar ge r
m o untin g brack et w ith one e li gi bl e fo r in sta llati on yo u may t ake c re dit for your prior
cor r ec ti ve ac tion. No furt h er turbocharger mountin g br acke t re pl aceme nt i s req uired

. (2) If, befo re th e effective date o f thi s A D , yo u p e rformed the crack inspection using eithe r of the fo ll owing: ( i) Lycoming E n g in es MS B No. 614A, dated Oc tobe r I 0 , 20 1 4, Exhaust System In s p ect ion , paragraphs 1 through 5 , or( ii ) Cessna Service Letter No. SEL-78-0 1 , dated May 30, 20 14 , you may tak e credit for your p r ior corrective action. No further inspect ion is required. However, you must sti ll replace th e turbocharger mountin g bracket. 

### ( h) A lt e rn ative Meth ods of Com pli ance (AMOCs) The Manage r , New York A ircraft Ce rtification Office , fAA , may ap pro ve AMOCs to this AD. Use the procedures found in 14 CFR 39.19 to make yo ur request. 

### ( i) R el ate d In fo rm at io n ( 1 ) For m o r e informat ion about thi s AD , contact Norm Pere n so n , Aerospace Engineer , New York A ircraft Certification Office , FAA , Engine & Prope ller Directorate , 1 600 Stewart Aven u e , S uite 410 , Westbu ry , NY 11590 ; phon e: 5 1 6-228-7337; fax: 516- 794

- 5531 ; e ma il: norman.perenson @ faa.gov. (2) Lycoming Engines MSB No. 614A , dated October 10 , 20 14 , which is not incorporated b y refe re nce , can be obtained from Lycom ing E n g in es u s ing the contact information in paragraph (i)(3) of this AD. (3) Fo r s ervice i nfo rmation identified in this AD, contact Lycomi n g Engines , 652 O l iver Street, Williamsport , PA 17701 ; phone: 800-258-3279 ; fax: 570-327-7 101; I nte rn e t:
www . l ycom i n g .c o m/Lycomi ng/ S U PPORT /Tec hni cal Pub I ication s/Se rvic e B u11etins.a s p x. (4) You may v i ew this service inf o rm ation at the FAA , Eng in e & Propeller Dire cto rate , 12 New England Executive Park , Burlington , MA. Fo r inforn1ation on the
a vailabi li ty of thi s material at the FAA , ca ll 781-238-7125.

Issued in Burlin g ton , Massachusetts, on January 21, 20 1 5.

Co lleen M. D ' Alessa ndro , Assistant Directorate Manager, Engine & Propeller Directorate , Aircraft Certi fication Service.