58002 Federal Register / Vol. 77, No. 182 / Wednesday, September 19, 2012 / Rules and Regulations 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0115; Directorate 

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

17195; AD 2012–18–18] 

RIN 2120–AA64 

Airworthiness Directives; Turbomeca 

S.A. Turboshaft Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are superseding an 

existing airworthiness directive (AD) for 

certain Turbomeca S.A. Arriel 2B and 

2B1 turboshaft engines. That AD 

currently requires accomplishment of 

the TU166 modification. This new AD 

requires adding the Arriel 2S2 and 2C2 

engines to the applicability of engines 

requiring the TU166 modification with 

different compliance times. This AD 

was prompted by reports of an accident 

involving a twin-engine helicopter 

powered by two Arriel 2S2 engines. We 

are issuing this AD to prevent rupture 

of a gas generator (GG) turbine blade, 

which could result in an uncommanded 

in-flight shutdown and a forced landing 

or accident. 

DATES: This AD is effective October 24, 

2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in the AD 

as of October 24, 2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain other publication listed in 

this AD as of August 12, 2011 (76 FR 

40222, July 8, 2011). 

ADDRESSES: For service information 

identified in this AD, contact 

Turbomeca, 40220 Tarnos, France; 

phone: 33 (0)5 59 74 40 00; telex: 570 

042; fax: 33 (0)5 59 74 45 15. You may 

view this service information at the 

FAA, Engine & Propeller Directorate, 12 

New England Executive Park, 

Burlington, MA. For information on the 

availability of this 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; 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 regulatory 

evaluation, any comments received, and 

other information. The address for the 

Docket Office (phone: 800–647–5527) is 

Document Management Facility, U.S. 

Department of Transportation, Docket 

Operations, M–30, West Building 

Ground Floor, Room W12–140, 1200 

New Jersey Avenue SE., Washington, 

DC 20590. 

FOR FURTHER INFORMATION CONTACT: Rose 

Len, Aerospace Engineer, Engine 

Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7772; fax: 781–238– 

7199; email: rose.len@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 2011–13–05, 

Amendment 39–16728 (76 FR 40222, 

July 8, 2011). That AD applies to 

Turbomeca S.A. Arriel 2B and 2B1 

turboshaft engines. The NPRM 

published in the Federal Register on 

June 1, 2012 (77 FR 32437). That NPRM 

proposed to continue to require 

accomplishment of the TU166 

modification on Turbomeca S.A. Arriel 

2B and 2B1 turboshaft engines. That 

NPRM also proposed to require adding 

the Arriel 2S2 engine to the 

applicability of engines requiring the 

TU166 modification with a different 

compliance time. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the proposal and the FAA’s 

response to each comment. 

Request To Add the Arriel 2C2 Engine 

Model 

Turbomeca S.A. requested that we 

add the Arriel 2C2 engine model to the 

proposed AD applicability. The 

commenter referenced European 

Aviation Safety Agency (EASA) AD 

2012–0124, dated July 9, 2012, issued to 

include the Arriel 2C2 engine model 

requiring the TU166 modification. 

We agree. We added the Arriel 2C2 

engine model to the AD applicability. 

Request To Reduce Compliance Time 

Sikorsky requested that we reduce the 

proposed AD compliance time for Arriel 

2S2 engine models to within 100-cyclesin-service (CIS), instead of 500 CIS, and, 

add a calendar time limitation of ‘‘but 

not later than September 30, 2012,’’ 

based on the EASA AD having a 

compliance date of November 16, 2012. 

The commenter believes that the 

frequency of occurrence of the blade 

ruptures, when the risk is analyzed per 

the FAA Advisory Circular 39–8, 

targeting a reasonable risk, argues for an 

earlier TU166 modification. 

We do not agree. The risk analyzed by 

Sikorsky had inputs that were too 

conservative. We did not change the 

AD. 

Conclusion 

We reviewed the relevant data, 

considered the comments received, and 

determined that air safety and the 

public interest require adopting the AD 

with the changes described previously. 

Costs of Compliance 

Based on the service information, we 

estimate that this AD will affect about 

551 products of U.S. registry. We also 

estimate that it will take about 60 workhours per product to comply with this 

AD. The average labor rate is $85 per 

work-hour. Required parts will cost 

about $3,900 per product. Based on 

these figures, we estimate the cost of the 

AD on U.S. operators to be $4,959,000. 

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 have 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 that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Is not a ‘‘significant rule’’ under 

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979), 


srobinson on DSK4SPTVN1PROD with RULES
Federal Register / Vol. 77, No. 182 / Wednesday, September 19, 2012 / Rules and Regulations 58003 

(3) Will not affect intrastate aviation 

in Alaska, and 

(4) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the 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 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) 

2011–13–05, Amendment 39–16728 (76 

FR 40222, July 8, 2011), and adding the 

following new AD: 

2012–18–18 Turbomeca S.A.: Amendment 

39–17195; Docket No. FAA–2011–0115; 

Directorate Identifier 2010–NE–40–AD. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective October 24, 2012. 

(b) Affected ADs 

This AD supersedes AD 2011–13–05, 

Amendment 39–16728 (76 FR 40222, July 8, 

2011). 

(c) Applicability 

This AD applies to Turbomeca S.A. Arriel 

2B, 2B1, 2S2, and 2C2 turboshaft engines not 

modified by TU166 modification. 

(d) Unsafe Condition 

This AD was prompted by reports of an 

accident involving a twin-engine helicopter 

powered by two Arriel 2S2 engines. We are 

issuing this AD to prevent rupture of a gas 

generator (GG) turbine blade, which could 

result in an uncommanded in-flight 

shutdown and a forced landing or accident. 

(e) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(1) For Arriel 2B and 2B1 turboshaft 

engines, accomplish the TU166 modification 

in accordance with the instructions specified 

within Turbomeca Alert Mandatory Service 

Bulletin (MSB) No. 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 676 cycles-in-service (CIS) 

after the effective date of this AD, whichever 

occurs first. 

(2) For Arriel 2S2 turboshaft engines, 

accomplish the TU166 modification in 

accordance with the instructions specified 

within Turbomeca Alert MSB No. A292 72 

4166 Version A, dated March 23, 2012, when 

the GG Turbine is replaced or when the 

engine or Module M03 is going through 

overhaul or repair, or within 500 CIS after the 

effective date of this AD, whichever occurs 

first. 

(3) For Arriel 2C2 turboshaft engines, 

accomplish the TU166 modification in 

accordance with the instructions specified 

within Turbomeca Alert MSB No. A292 72 

5166 Version A, dated June 18, 2012, when 

the GG Turbine is replaced or when the 

engine or Module M03 is going through 

overhaul or repair or within 650 engine hours 

after the effective date of this AD, whichever 

occurs first. 

(f) Credit for Actions Accomplished in 

Accordance With Previous Service 

Information 

(1) For Arriel 2B and 2B1 turboshaft 

engines, if you performed the TU166 

modification before the effective date of this 

AD using Turbomeca Alert MSB No. A292 72 

3166 Version A, dated August 17, 2010, you 

met the requirements of paragraph (e)(1) of 

this AD. 

(2) For Arriel 2C2 and 2S2 turboshaft 

engines, if you performed the TU166 

modification before the effective date of this 

AD using Turbomeca Alert MSB No. A292 72 

2166 Version A, dated March 30, 2009, 

Version B, dated September 4, 2009, Version 

C, dated June 15, 2010, Version D, dated July 

28, 2010, Version E, dated October 4, 2010, 

Version F, dated May 13, 2011, or Version G, 

dated March 26, 2012, you met the 

requirements of paragraph (e)(2) or (e)(3) as 

applicable, of this AD. 

(g) 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. 

(h) Related Information 

(1) For more information about this AD, 

contact Rose Len, Aerospace Engineer, 

Engine Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7772; fax: 781–238–7199; 

email: rose.len@faa.gov. 

(2) European Aviation Safety Agency AD 

2012–0054, dated April 2, 2012, and AD 

2012–0124, dated July 9, 2012, also pertain 

to this AD. 

(i) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the 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 October 24, 2012. 

(i) Turbomeca Alert Mandatory Service 

Bulletin No. A292 72 4166 Version A, dated 

March 23, 2012. 

(ii) Turbomeca Alert Mandatory Service 

Bulletin No. A292 72 5166 Version A, dated 

June 18, 2012. 

(4) The following service information was 

approved for IBR on August 12, 2011 (76 FR 

40222, July 8, 2011). 

(i) Turbomeca Alert Mandatory Service 

Bulletin (MSB) No. A292 72 3166 Version B, 

dated September 20, 2010. 

(ii) Reserved. 

(5) For Turbomeca service information 

identified in this AD, contact Turbomeca, 

40220 Tarnos, France; phone: 33 (0)5 59 74 

40 00; telex: 570 042; fax: 33 (0)5 59 74 45 

15. 

(6) You may view this service information 

at FAA, Engine & Propeller Directorate, 12 

New England Executive Park, Burlington, 

MA. For information on the availability of 

this 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 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 

September 6, 2012. 

Robert G. Mann, 

Acting Manager, Engine & Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2012–22536 Filed 9–18–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2006–24785; Directorate 

Identifier 2006–NE–20–AD; Amendment 39– 

17196; AD 2012–19–01] 

RIN 2120–AA64 

Airworthiness Directives; Lycoming 

Engines Reciprocating Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are superseding an 

existing airworthiness directive (AD) for 

certain Lycoming Engines (L)O–360, 

(L)IO–360, AEIO–360, O–540, IO–540, 

AEIO–540, (L)TIO–540, IO–580, and IO– 

720 series reciprocating engines. That 

AD currently requires replacing certain 

crankshafts in the affected engines. This 

AD continues to require replacing 

certain crankshafts, corrects the start 

date of affected engine models in 

Lycoming Mandatory Service Bulletin 

(MSB) No. 569A to the start date in 

Supplement No. 1 to Lycoming MSB 

No. 569A, dated May 27, 2009, and 


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