Federal Register, Volume 75, Number 30, February 16, 2010, Pages 7027-7148 Page: 7,028
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Federal Register/Vol. 75, No. 30/Tuesday, February 16, 2010/Rules and Regulations
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
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
under the criteria of the Regulatory
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 (telephone
(800) 647-5527) is provided in the
ADDRESSES section. Comments will be
available in the AD docket shortly after
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
Adoption of the Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA amends 14 CFR part 39 as
m 1. The authority citation for part 39
continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
* 2. The FAA amends 39.13 by adding
the following new AD:
2010-04-07 Turbomeca: Amendment 39-
16200. Docket No. FAA-2009-0568;
Directorate Identifier 2009-NE-20-AD.
(a) This airworthiness directive (AD)
becomes effective March 23, 2010.
(c) This AD applies to Turbomeca Arriel
2S1 turboshaft engines that have not
incorporated Modification TU 109. These
engines are installed on, but not limited to,
Sikorsky S-76C twin-engine helicopters.
(d) 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. We are
issuing this AD to prevent loss of full
automatic control of the engine during
acceleration up to the One Engine
Inoperative 30-second rating. This condition
could result in reduced controllability of the
Actions and Compliance
(e) Unless already done, do the following
(1) Within 350 operating hours after the
effective date of this AD, perform an upgrade
of the digital electronic control unit (DECU)
software to version 11.01, to implement
modification TU 109.
(2) Guidance on implementing TU 109 can
be found in Turbomeca Mandatory Service
Bulletin No. 292 73 2109, Version E, dated
September 17, 2008.
Prohibition of Mixed DECU Software
Versions on the Same Helicopter
(3) Do not operate an Arriel 2S1-powered
twin-engine helicopter with one engine
upgraded to modification TU 109 if the other
engine is not upgraded to modification TU
FAA AD Differences
(f) This AD differs from the Mandatory
Continuing Airworthiness Information
(MCAI) and/or service information as
(1) The MCAI requires performing the
DECU software upgrade no later than August
(2) This proposed AD would require
performing the DECU software upgrade
within 350 operating hours after the effective
date of the proposed AD.
Alternative Methods of Compliance
(g) 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.
(h) Refer to MCAI EASA Airworthiness
Directive 2009-0010, dated January 20, 2009,
and Turbomeca Mandatory Service Bulletin
No. 292 73 2109, Version E, dated September
17, 2008, for related information. Contact
Turbomeca, 40220 Tarnos, France; telephone
(33) 05 59 74 40 00, fax (33) 05 59 74 45 15
for the service information identified in this
(i) Contact Kevin Dickert, Aerospace
Engineer, Engine Certification Office, FAA,
Engine and Propeller Directorate, 12 New
England Executive Park, Burlington, MA
01803; e-mail: firstname.lastname@example.org;
telephone (781) 238-7117; fax (781) 238-
7199, for more information about this AD.
Material Incorporated by Reference
Issued in Burlington, Massachusetts, on
February 8, 2010.
Peter A. White,
Assistant Manager, Engine and Propeller
Directorate, Aircraft Certification Service.
[FR Doc. 2010-3000 Filed 2-12-10; 8:45 am]
BILLING CODE 4910-13-P
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United States. Office of the Federal Register. Federal Register, Volume 75, Number 30, February 16, 2010, Pages 7027-7148, periodical, February 16, 2010; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc67594/m1/6/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.