[4910-13-P] DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2010-0683; Directorate Identifier 2010-NE-25-AD; Amendment 39-18065; AD 2015-02-01] RIN 2120-AA64 Airworthiness Directives; Technify Motors GmbH (Type certificate previously held by Thielert Aircraft Engines GmbH) Reciprocating Engines AGENCY: Federal Aviation Administration (FAA) , DOT. ACTION: Final rule ; request for comments. SUMMARY: We are superseding airworthiness directive (AD) 2011-23-01 for all Technif y Motors GmbH (TMG) models TAE 125-01 and TAE 125-02-99 reciprocating

engines with certain part number (PIN) and serial number (SIN) clutch assemblies installed
. AD 2011-23-01 required replacement of certain 

### PIN and SIN clutch assemblies. This AD requires the same actions but expands the population ofaffected 

### PIN and SIN clutch assemblies. This AD was prompted by an additional report ofa clutch assembly that malfunctioned due to disk springs that received a nonconforming heat treatment process. We are is suing thi s AD to prevent failure ofthe clutch as sembly, which could lead to f ailure ofthe engine, in-flight shutdown, and loss of control ofthe airplane. DATES: This AD is effective [INSERT DATE 15 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER].

### The Director ofthe Federal Register approved the incorporation by reference of a certain publication listed in this AD as of [INSERT DATE 15 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. The Director ofthe Federal Register approved the incorporation by reference of a certain other publication listed in this AD as ofNovember 22, 2011 (76 FR 68636, November 7, 2011). We must receive any comments on this AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. ADDRESSES: 

### You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any ofthe following methods:

• Federal eRulemaking Portal: Go to http: //www. regulations.gov. Follow the instructions for submitting comments.

• Fax: 202-493-2251.

• Mail: U
.S. Department ofTransportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590.

• Hand Delivery: U.S. Department ofTransportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140 , 1200 New Jersey Avenue SE. , Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays
. For service information identified in this AD , contact Technify Motors GmbH, Platanenstrasse 14, D-09356 Sankt Egidien, Germany; phone: +49-37204-696-0 ; fax : +49-37204-696-55; email: info @ centurion-engines.com. You may view this service 2information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability ofthis material at the FAA, call 781-238-7125. 

### Examining the AD Docket You may examine the AD docket on the Internet at http ://www.regulations.gov by searching for and locating Docket No. FAA-2010-0683; 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 AD, the mandatory continuing airworthiness information, regulatory evaluation, any comments received, and other information. The 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: Christopher McGuire, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; phone: 781-238-7120; fax: (781) 238- 7199; email: Chris.McGuire@faa.gov. 

### SUPPLEMENTARY INFORMATION: Comments Invited This AD is a final rule that involves requirements affecting flight safety, and we did not provide you with notice and an opportunity to provide your comments before it becomes effective. However, we invite you to send any written data, views , or arguments about this AD. Send your comments to an address listed under the ADDRESSES section. Include "Docket No. FAA-20 10-0683 ; Directorate Identifier 201 0-NE-25-AD " at the beginning ofyour comments. We specifically invite comments on the overall regulatory, 

### 3economic, environmental, and energy aspects ofthis AD. We will consider all comments received by the closing date and may amend this AD because ofthose comments. We will post all comments we receive , without change, to http://www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this AD. Discussion On August 16, 2010, we issued AD 2010-18-02, Amendment 39-16415 (75 FR 52240, August 25, 201 0), ("AD 201 0-18-02"), for certain Thielert Aircraft Engines GmbH (TAE) (previous certificate holder) models TAE 125-01 and TAE 125-02-99 reciprocating engines. AD 2010-18-02 resulted from reports ofengine in-flight shutdowns. Preliminary investigation showed that nonconforming disc springs used in a certain production batch ofthe clutch caused the shutdowns. AD 2010-18-02 required replacement ofcertain clutch assemblies. On October 19,2011, we superseded AD 2010-18-02, issuing AD 2011-23-01, Amendment 39-16852 (76 FR 68636 , November 7, 2011), for certain TAE models TAE 125-01 and TAE 125-02-99 reciprocating engines. AD 2011-23-01 required replacement ofcertain 

### PIN and SIN clutch assemblies due to clutch failure. AD 2011-23-01 resulted from TAE identifying additional clutch assemblies with nonconforming disc springs. Actions Since AD 2011-23-01 was Issued Since we issued AD 2011-23-01, Amendment 39-16852 (76 FR 68636 , November 7, 2011 ), we received an additional report ofa malfunctioning clutch assembly. Investigation found that the same unsafe condition exists on approximately 40 additional SIN clutch assemblies that have nonconforming disk springs. Those additional 4nonconforming disc springs are identified in TMG Service Bulletin No. TM TAE 125- 0021, Revision 2, dated October 13, 2014. 

### FAA's Determination We are issuing this AD because we evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products ofthese same type designs. 

### AD Requirements This AD requires, for engines with affected clutch assemblies with more than 100 hours time since new (TSN), replacement of affected clutch assemblies before further flight. This AD also requires, for those engines with affected clutch assemblies that have accumulated less than 100 hours TSN, replacement ofaffected clutch assemblies before accumulating 100 hours TSN. 

### FAA's Justification and Determination of the Effective Date An unsafe condition exists that requires the immediate adoption ofthis AD. The FAA has found that the risk to the flying publicjustifies waiving notice and comment prior to adoption ofthis rule because TMG identified additional clutch assemblies with nonconforming disc springs and the need for operators to comply with some ofthe AD actions before further flight. Therefore, we find that notice and opportunity for prior public comment are impracticable and that good cause exists for making this amendment effective in less than 30 days. 

### Costs of Compliance We estimate that this AD will affect about 111 engines installed on airplanes of U
.S. registry
. We also estimate that it will take about 16 hours per engine to perform the 

### 5clutch assembly replacement. The average labor rate is $85 per hour. Required parts will cost about $1 ,796. Based on these figures, we estimate the cost ofthe AD on U.S
. operators to be $3 50,316. Authority for this Rulemaking Title 49 ofthe United States Code specifies the FAA ' s authority to issue rules on aviation safety. Subtitle I, Section 106, describes the authority ofthe FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope ofthe Agency's authority
. We are issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701, " General requirements." Under that section, Congress charges 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 regulation is within the scope ofthat authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution ofpower and responsibilities among the various levels of government. For the reasons discussed above, I certify that this AD: (1) Is not a " significant regulatory action" under Executive Order 12866,

6(2) Is not a " significant rule" under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska to the extent that itjustifies making a regulatory distinction, and (4) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria ofthe Regulatory Flexibility Act. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends part 39 ofthe Federal Aviation Regulations (14 CFR part 39) as follows: PART 39 -AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113,44701. 

### § 39.13 [Amended] 2. The FAA amends§ 39
. 13 by removing airworthiness directive (AD) 2011-23- 01 , Amendment 39-16852 (76 FR 68636 , November 7, 2011), and adding the following

new AD: 2015-02-01 Technify Motors GmbH (Type Certificate previously held by Thielert Aircraft Engines GmbH): Amendment 39-18065; Docket No. FAA-2010-0683; Directorate Identifier 201 0-NE-25-AD

.

7(a) Effective Date This AD is effective [INSERT DATE 15 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. (b) Affected ADs This AD supersedes AD 2011-23-01, Amendment 39-16852 (76 FR 68636, November 7, 2011). (c) Applicability This AD applies to Technify Motors GmbH (TMG) models TAE 125-01 and TAE 125-02-99 reciprocating engines, with a clutch assembly part number (PIN) listed in paragraphs (c)(i) through (c)(v) ofthis AD, and with a serial number (SIN) listed in either TMG Service Bulletin (SB) No. TM TAE 125-0021, Revision 2, dated October 13,2014,

or Thielert Aircraft Engines GmbH (TAE) SB No. TM TAE 125-1011 P1, Revision 2, dated August 31, 2011, installed. (i) 

### PIN 02-7210-11001R11 (ii) 

### PIN 02-7210-11001R11-AT (iii) 

### PIN 02-7210-11001R13 (iv) 

### PIN 05-7211-K006001 (v) 

### PIN 05-7211-K006002 (d) Unsafe Condition This AD was prompted by TMG identifying 40 additional SIN clutch assemblies with nonconforming disk springs for TMG TAE 125-01 reciprocating engines. We are issuing this AD to prevent failure ofthe clutch assembly, which could lead to failure of the engine, in-flight shutdown, and loss of control of the airplane. 8(e) Compliance Comply with thi s AD within the compliance times specified, unless already done

. After the effective date ofthis AD: (1) For engines with affected clutch assemblies that have accumulated 100 hours time since new (TSN) or more, replace the clutch assembly before further flight. (2) For engines with affected clutch assemblies that have accumulated less than 100 hours TSN, replace the clutch assembly before accumulating 100 hours TSN. (f) Installation Prohibition After the effective date ofthis AD, do not install onto any airplane any engine having a clutch assembly, 

### PIN 02-7210-11001R11, 

### PIN 02-7210-11001Rl1-AT, 

### PIN 02- 7210-11001R13 , 

### PIN 05-7211-K006001 , or 

### PIN 05-7211

- K006002 , installed, that has

an SIN listed in TMG SB No. TM TAE 125-0021 , Revision 2, dated October 13,2014, or in TAE SB No. TM TAE 125-1011 P 1, Revision 2, dated August 31, 2011. (g) Credit for Previous Actions If before the effective date ofthis AD you replaced an affected clutch assembly with a clutch assembly not listed in this AD , or with one not listed in either TMG SB No. TM TAE 125-0021 , Revision 2, dated October 13 ,2014, or TAE SB No
. TM TAE 125- 1011 P 1, Revision 2, dated August 31, 2011, then you met the requirements ofparagraph (e) ofthi s AD and no further action is required to comply with this AD
. (h) Alternative Methods of Compliance (AMOCs) The Manager, Engine Certification Office, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39
. 19 to make your request. You may email your request to: ANE-AD-AMOC @ faa.gov. 9(i) Related Information (1) For more information about this AD, contact Christopher McGuire, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; phone: 781-238-7120 ; fax: (781) 238- 7199 ; email: Chris.McGuire @ faa.gov. (2) Refer to MCAI European Aviation Safety Agency AD 2014-0232, dated October 22, 2014 and corrected on November 4, 2014, for more information. You may examine the MCAI in the AD docket on the Internet at http: //www.regulations.gov by searching for and locating it in Docket No. FAA-2010-0683

. 

### U) Material Incorporated by Reference (1) The Director ofthe Federal Register approved the incorporation by reference (IBR) ofthe service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.(2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (3) The following service information was approved for IBR on [INSERT DATE 15 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. (i) Technify Motors GmbH (TMG) Service Bulletin (SB) No
. TM TAE 125-0021 , Revision 2, dated October 13 , 2014. (ii) Reserved. (4) The following service information was approved for IBR on November 22 , 2011.

10(i) Thielert Aircraft Engines GmbH (TAE) SB No. TM TAE 125-1011 P1 , Revision 2, dated August 31, 2011. (ii) Reserved. (5) For TMG and TAE service information identified in this AD , contact Technify Motors GmbH, Platanenstrasse 14, D-09356 Sankt Egidien, Germany ; phone : +49- 37204-696-0 ; fax : +49-37204-696-55 ; email: info @ centurion-engines

.com. (6) You may view this service information at FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability ofthis material at the FAA, call 781-238-7125. (7) You may view this service information at the National Archives and Records Administration (NARA)
. For information on the availability ofthis material at NARA, call 202-741-6030, or go to: http: //www.archives.gov/federal-register/cfr/ibrlocations.html. Issued in Burlington, Massachusetts , on January 8, 2015.

Colleen M. D'Alessandro , Assistant Directorate Manager, Engine & Propeller Directorate, Aircraft Certification Service.

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