40222 Federal Register / Vol. 76, No. 131 / Friday, July 8, 2011 / Rules and Regulations 

reference of Rotax Aircraft Engines 

Mandatory Service Bulletin SB–912–058 SB– 

914–041, dated April 15, 2011. 

(2) For service information identified in 

this AD, contact BRP-Rotax GmbH & Co. KG, 

Welser Strasse 32, A–4623 Gunskirchen, 

Austria; phone: +43 7246 601 0; fax: +43 

7246 601 9130; Internet: http://www.rotaxaircraft-engines.com. 

(3) You may review copies of the 

referenced service information at the FAA, 

Small Airplane Directorate, 901 Locust, 

Kansas City, Missouri 64106. For information 

on the availability of this material at the 

FAA, call (816) 329–4148. 

(4) You may also review copies of the 

service information incorporated by reference 

for this AD at the National Archives and 

Records Administration (NARA). For 

information on the availability of this 

material at NARA, call (202) 741–6030, or go 

to: http://www.archives.gov/federal_register/ 

code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Kansas City, Missouri, on July 1, 

2011. 

Earl Lawrence, 

Manager, Small Airplane Directorate, Aircraft 

Certification Service. 

[FR Doc. 2011–17144 Filed 7–7–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0115; Directorate 

Identifier 2010–NE–40–AD; Amendment 39– 

16728; AD 2011–13–05] 

RIN 2120–AA64 

Airworthiness Directives; Turbomeca 

S.A. ARRIEL 2B and 2B1 Turboshaft 

Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This AD results 

from mandatory continuing 

airworthiness information (MCAI) 

issued by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: 

Several cases of Gas Generator (GG) 

Turbine Blade rupture occurred in service on 

ARRIEL 2 twin engine applications and 

recently one on a single engine helicopter. 

For the case occurring in flight on a single 

engine helicopter (ARRIEL 2B1 engine), the 

pilot performed an emergency autorotation, 

landing the helicopter without further 

incident. 

We are issuing this AD to prevent 

rupture of a GG turbine blade, which 

could result in an uncommanded inflight shutdown and an emergency 

autorotation landing or accident. 

DATES: This AD becomes effective 

August 12, 2011. The Director of the 

Federal Register approved the 

incorporation by reference of a certain 

publication listed in this AD as of 

August 12, 2011. 

ADDRESSES: The Docket Operations 

office is located at Docket Management 

Facility, U.S. Department of 

Transportation, 1200 New Jersey 

Avenue, SE., West Building Ground 

Floor, Room W12–140, Washington, DC 

20590–0001. 

FOR FURTHER INFORMATION CONTACT: Rose 

Len, Aerospace Engineer, Engine 

Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail: rose.len@faa.gov; phone: (781) 

238–7772; fax (781) 238–7199. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an AD that would 

apply to the specified products. That 

NPRM was published in the Federal 

Register on February 18, 2011 (76 FR 

9515). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

Several cases of Gas Generator (GG) 

Turbine Blade rupture occurred in service on 

ARRIEL 2 twin engine applications and 

recently one on a single engine helicopter. 

For the case occurring in flight on a single 

engine helicopter (ARRIEL 2B1 engine), the 

pilot performed an emergency autorotation, 

landing the helicopter without further 

incident. 

The design of ARRIEL 2 engines 

(containment shield around the GG turbine) 

allows debris from a blade or the disc interblade area to be contained in the event of 

rupture. However, the rupture of a GG 

Turbine Blade may lead to an uncommanded 

In Flight Shut-Down which, on a singleengine helicopter, could ultimately lead to an 

emergency autorotation landing. 

The most probable root cause of the 

ruptures is an excitation of one of the 

vibration modes of the GG Turbine Blade in 

conjunction with several secondary 

contributing factors which are deemed 

sufficient to reduce the stress margin of the 

blade to a level consistent with the rate of 

occurrences of ruptures encountered. 

Turbome ́ca has released TU166 

modification which consists in inserting 

Blade dampers between the GG Turbine Disc 

and the GG Turbine Blade platform. 

Introduction of these dampers minimizes the 

effects of HP blade vibratory excitation and 

increases the blade tolerance for this type of 

stress. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the NPRM. 

Conclusion 

We reviewed the available data and 

determined that air safety and the 

public interest require adopting the AD 

as proposed. 

Costs of Compliance 

Based on the service information, we 

estimate that this AD would affect about 

537 products of U.S. registry. We also 

estimate that it would take about 60 

work-hours per product to comply with 

this AD. The average labor rate is $85 

per work-hour. Required parts would 

cost about $3,900 per product. Based on 

these figures, we estimate the cost of the 

AD on U.S. operators to be $4,833,000. 

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 of 

the FAA Administrator. ‘‘Subtitle 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 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 of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We determined that 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 of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify this AD: 

1. Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866; 

2. Is not a ‘‘significant rule’’ under the 

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979); and 

3. Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 


wreier-aviles on DSKGBLS3C1PROD with RULES
Federal Register / Vol. 76, No. 131 / Friday, July 8, 2011 / Rules and Regulations 40223 

under the criteria of the Regulatory 

Flexibility Act. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this AD and placed it in the AD docket. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Operations office between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this AD, the regulatory 

evaluation, any comments received, and 

other information. The street address for 

the Docket Operations office (phone: 

(800) 647–5527) is provided in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

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 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 adding 

the following new AD: 

2011–13–05 Turbomeca S.A.: Amendment 

39–16728. Docket No. FAA–2011–0115; 

Directorate Identifier 2010–NE–40–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective August 12, 2011. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Turbomeca S.A. 

ARRIEL 2B and 2B1 turboshaft engines not 

modified by TU166 modification. These 

engines are installed on, but not limited to, 

Eurocopter AS 350 B3 and EC 130 B4 

helicopters. 

Reason 

(d) This AD results from: 

Several cases of Gas Generator (GG) 

Turbine Blade rupture occurred in service on 

ARRIEL 2 twin engine applications and 

recently one on a single engine helicopter. 

For the case occurring in flight on a single 

engine helicopter (ARRIEL 2B1 engine), the 

pilot performed an emergency autorotation, 

landing the helicopter without further 

incident. 

We are issuing this AD to prevent rupture 

of a GG turbine blade, which could result in 

an uncommanded in-flight shutdown and an 

emergency autorotation landing or accident. 

Actions and Compliance 

(e) Unless already done, do the following 

actions. 

(1) Accomplish TU166 modification in 

accordance with the instructions specified 

within Turbome ́ca Mandatory Service 

Bulletin (MSB) A292 72 3166 Version B, 

dated September 20, 2010, when the GG 

Turbine is replaced or when the engine or 

Module M03 is going through overhaul or 

repair, or within 1,300 cycles-in-service after 

the effective date of this AD, whichever 

occurs first. 

(2) Accomplishment, before the effective 

date of this AD, of TU166 modification in 

accordance with the instructions of 

Turbome ́ca MSB A292 72 3166 Version A, 

dated August 17, 2010, satisfies the 

requirement of paragraph (e)(1) of this AD. 

FAA AD Differences 

(f) This AD differs from the Mandatory 

Continuing Airworthiness Information 

(MCAI) and or service information by the 

following: 

(1) European Aviation Safety Agency 

(EASA) AD No. 2010–0198, dated October 1, 

2010, applies to the ARRIEL 2B1A engine. 

This AD does not apply to that model 

because it has no U.S. type certificate. 

(2) EASA AD No. 2010–198 has a 

compliance date of ‘‘but no later than 25 

months after the effective date of this AD. 

This AD has a compliance time of ‘‘1,300 

cycles-in-service,’’ based on average fleet 

usage data supplied by Turbomeca. 

Other FAA AD Provisions 

(g) The following provisions also apply to 

this AD: 

Alternative Methods of Compliance 

(AMOCs) 

(h) The Manager, Engine Certification 

Office, FAA, has the authority to approve 

AMOCs for this AD, if requested using the 

procedures found in 14 CFR 39.19. 

Related Information 

(i) Refer to MCAI EASA Airworthiness 

Directive 2010–0198, dated October 1, 2010, 

for related information. 

(j) Contact Rose Len, Aerospace Engineer, 

Engine Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail: rose.len@faa.gov; phone: (781) 238– 

7772; fax (781) 238–7199, for more 

information about this AD. 

Material Incorporated by Reference 

(k) You must use Turbomeca S.A. 

Mandatory Service Bulletin A292 72 3166 

Version B, dated September 20, 2010, to do 

the actions required by this AD, unless the 

AD specifies otherwise. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) For service information identified in 

this AD, contact Turbomeca S.A., 40220 

Tarnos, France; e-mail: noriadallas@turbomeca.com; telephone 33 05 59 

74 40 00, fax 33 05 59 74 45 15, or go to: 

http://www.turbomeca-support.com. 

(3) You may review copies at the FAA, 

New England Region, 12 New England 

Executive Park, Burlington, MA; or at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, call 

(202) 741–6030, or go to: http:// 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued in Burlington, Massachusetts, on 

June 14, 2011. 

Peter A. White, 

Acting Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2011–16955 Filed 7–7–11; 8:45 am] 

BILLING CODE 4910–13–P 

SECURITIES AND EXCHANGE 

COMMISSION 

17 CFR Parts 230, 240 and 260 

[Release Nos. 33–9232; 34–64800; 39–2476; 

File No. S7–02–09] 

RIN 3235–AK26 

Extension of Temporary Exemptions 

for Eligible Credit Default Swaps To 

Facilitate Operation of Central 

Counterparties To Clear and Settle 

Credit Default Swaps 

AGENCY: Securities and Exchange 

Commission. 

ACTION: Final temporary rules; 

extension. 

SUMMARY: We are extending the 

expiration dates in our temporary rules 

that provide exemptions under the 

Securities Act of 1933, the Securities 

Exchange Act of 1934, and the Trust 

Indenture Act of 1939 for certain credit 

default swaps in order to continue 

facilitating the operation of one or more 

central counterparties for those credit 

default swaps as we consider rules 

implementing the clearing provisions of 

the Dodd-Frank Wall Street Reform and 

Consumer Protection Act. 

DATES: Effective Date: These 

amendments are effective July 8, 2011, 

and the expiration dates in the 

temporary rules and amendments 

published January 22, 2009 (74 FR 

3967), extended in a release published 

on September 17, 2009 (74 FR 47719), 

and further extended in a release 

published on November 26, 2010 (75 FR 

72660), are further extended from July 

16, 2011 to April 16, 2012. If the 

Commission adopts permanent 

exemptions for security-based swaps 


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