Airworthiness Directives Eurocopter France (ECF) Model SA-365N1, AS-365N2, AS 365 N3, EC 155B, and EC155B1 Helicopters

[Federal Register Volume 75, Number 183 (Wednesday, September 22, 2010)]
[Rules and Regulations]
[Pages 57659-57660]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-23098]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-0426; Directorate Identifier 2009-SW-34-AD; 
Amendment 39-16433; AD 2010-19-05]
RIN 2120-AA64


Airworthiness Directives Eurocopter France (ECF) Model SA-365N1, 
AS-365N2, AS 365 N3, EC 155B, and EC155B1 Helicopters

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for the 
specified ECF model helicopters. This AD results from a mandatory 
continuing airworthiness information (MCAI) AD issued by the aviation 
authority of the European Aviation Safety Agency (EASA). The MCAI AD 
reports the separation and loss of a stainless steel ring (75 
millimeter (mm) in diameter) from a tail rotor blade (blade) sleeve 
resulting in severe, high-frequency vibrations, which can lead to 
damage to the fenestron blades, loss of yaw control, and subsequent 
loss of control of the helicopter.

DATES: This AD becomes effective on October 27, 2010.
    The incorporation by reference of certain publications is approved 
by the Director of the Federal Register as of October 27, 2010.

ADDRESSES: You may examine the AD docket on the Internet at http://regulations.gov or in person at the Docket Operations office, U.S. 
Department of Transportation, M-30, West Building Ground Floor, Room 
W12-140, 1200 New Jersey Avenue, SE., Washington, DC between 9 a.m. and 
5 p.m. Monday through Friday, except Federal holidays.
    You may get the service information identified in this AD from 
American Eurocopter Corporation, 2701 Forum Drive, Grand Prairie, TX 
75053-4005, telephone (800) 232-0323, fax (972) 641-3710, or at http://www.eurocopter.com.
    Examining the AD Docket: The AD docket contains the Notice of 
proposed rulemaking (NPRM), the economic evaluation, any comments 
received, and other information. The street address and operating hours 
for the Docket Operations office (telephone (800) 647-5527) are in the 
ADDRESSES section of this AD. Comments will be available in the AD 
docket shortly after they are received.

FOR FURTHER INFORMATION CONTACT: DOT/FAA Southwest Region, Gary Roach, 
ASW-111, Aviation Safety Engineer, Rotorcraft Directorate, Regulations 
and Guidance Group, 2601 Meacham Blvd., Fort Worth, Texas 76137; 
telephone (817) 222-5130; fax (817) 222-5961.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued an NPRM to amend 14 CFR part 39 to include an AD that 
would apply to the specified ECF model helicopters on April 14, 2010. 
That NPRM was published in the Federal Register on April 22, 2010 (75 
FR 20931). That NPRM proposed:
    <bullet> For the ECF Model SA-365N1, AS-365N2, and AS 365 N3 
helicopters, within 50 hours time-in-service (TIS), and thereafter at 
intervals not to exceed 10 hours TIS, inspecting each blade of the 
fenestron tail rotor to determine whether there has been any outward 
slippage (toward the shroud) of the stainless steel ring that is around 
the sleeve of each blade where the blade enters the fenestron hub.
    <bullet> For the ECF Model EC 155B or B1 helicopters, within 50 
hours TIS, and thereafter at intervals not to exceed 15 hours TIS, 
inspecting each blade for slippage of the fenestron tail rotor to 
determine whether there has been any outward slippage (toward the 
shroud) of the stainless steel ring that is around the sleeve of each 
blade where the blade enters the fenestron hub.
    <bullet> If the stainless steel ring has slipped outward, before 
further flight, replacing the blade with an airworthy blade.

Comments

    By publishing the NPRM, we gave the public an opportunity to 
participate in developing this AD. We received no comment on the NPRM 
or on our determination of the cost to the public; however, since the 
issuance of the NPRM, the average labor rate has increased from $80 per 
work hour to $85 per work hour, resulting in an increase of $41 in 
costs of compliance. We have determined that this change does not 
significantly increase the economic burden on any AD operator nor does 
it increase the scope of the AD. Therefore, based on our review and 
evaluation of the available data, we have determined that air safety 
and the public interest require adopting the AD as proposed.

Related Service Information

    Eurocopter has issued Alert Service Bulletin No. 05A011 for the 
Model EC 155B and B1 helicopters and No. 05.00.49 for the Model SA-
365N1, AS-365N2, and AS 365 N3 helicopters. Both service bulletins are 
dated March 1, 2006. The service information specifies checking the 
blade sleeve for slippage of the stainless steel ring (75 mm in 
diameter) and replacing the blade if the stainless steel ring has 
slipped. The actions described in the MCAI AD are intended to correct 
the same unsafe condition as that identified in the service 
information.

Differences Between This AD and the MCAI AD

    We refer to flying hours as hours time-in-service. Also, we use 
``inspect'' rather than ``check'' to describe the actions required by 
this AD. We use a different initial compliance time.

Costs of Compliance

    We estimate that this AD will affect about 33 helicopters of U.S. 
registry. We also estimate that it will take about 15 minutes per 
helicopter to inspect for slippage of the stainless steel ring of the 
blade sleeve. The average labor rate is $85 per work-hour. Based on 
these figures, we estimate the cost of the AD on U.S. operators is 
$701, assuming none of the blades are replaced.

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

[[Page 57660]]

because it addresses an unsafe condition that is likely to exist or 
develop on product(s) 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.
    Therefore, 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 Flexibility Act.
    We prepared an economic evaluation of the estimated costs to comply 
with this AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

0
Accordingly, under the authority delegated to me by the Administrator, 
the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new AD:

2010-19-05 Eurocopter France: Amendment 39-16433 ; Docket No. FAA-
2010-0426; Directorate Identifier 2009-SW-34-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective on 
October 27, 2010.

Other Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Model SA-365N1, AS-365N2, AS 365 N3, EC 
155B, and EC155B1 helicopters, with a fenestron tail rotor blade 
(blade), part number 365A12-0060-01 or 365A12-0070-00, installed, 
certificated in any category.

Reason

    (d) The mandatory continuing airworthiness information (MCAI) AD 
reports the separation and loss of a stainless steel ring (75 mm in 
diameter) from a blade sleeve resulting in severe, high-frequency 
vibrations, which can lead to damage to the fenestron blades, loss 
of yaw control, and subsequent loss of control of the helicopter.

Actions and Compliance

    (e) Required as indicated:
    (1) For the Model SA-365N1, AS-365N2, and AS 365 N3 helicopters, 
within 50 hours time-in-service (TIS), unless done previously, and 
thereafter at intervals not to exceed 10 hours TIS, inspect each 
blade of the fenestron tail rotor to determine whether there has 
been any outward slippage (toward the shroud) of the stainless steel 
ring that is around the sleeve of each blade where the blade enters 
the fenestron hub as depicted in Appendix 1 and by following the 
Accomplishment Instructions, paragraph 2.B.1., of Eurocopter Alert 
Service Bulletin No. 05.00.49, dated March 1, 2006.
    (2) For the Model EC 155B or B1 helicopters, within 50 hours 
time-in-service (TIS), unless done previously, and thereafter at 
intervals not to exceed 15 hours TIS, inspect each blade of the 
fenestron tail rotor to determine whether there has been any outward 
slippage (toward the shroud) of the stainless steel ring that is 
around the sleeve of each blade where the blade enters the fenestron 
hub as depicted in Appendix 1 and by following paragraph 2.B.1., of 
Eurocopter Alert Service Bulletin No. 05A011, dated March 1, 2006.
    (3) If the stainless steel ring has slipped outward, before 
further flight, replace the blade with an airworthy blade.

Differences Between This AD and the MCAI AD

    (f) We refer to flying hours as hours time-in-service. Also, we 
use ``inspect'' rather than ``check'' to describe the action to be 
taken in the AD. We use a different initial compliance time.

Other Information

    (g) Alternative Methods of Compliance (AMOCs): The Manager, 
Rotorcraft Directorate, Safety Management Group, Attn: DOT/FAA 
Southwest Region, Gary Roach, ASW-111, Aviation Safety Engineer, 
Regulations and Guidance Group, 2601 Meacham Blvd., Fort Worth, 
Texas 76137, telephone (817) 222-5130, fax (817) 222-5961, has the 
authority to approve AMOCs for this AD, if requested using the 
procedures found in 14 CFR 39.19.

Related Information

    (h) European Aviation Safety Agency MCAI Airworthiness Directive 
No. 2006-0099, dated April 24, 2006, contains related information.

Joint Aircraft System/Component (JASC) Code

    (i) The JASC Code is 6400: Tail Rotor.

Material Incorporated by Reference

    (j) You must use the specified portions of Eurocopter Alert 
Service Bulletins No. 05A011 and No. 05.00.49, both dated March 1, 
2006, to do the actions required.
    (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 
American Eurocopter Corporation, 2701 Forum Drive, Grand Prairie, TX 
75053-4005, telephone (800) 232-0323, fax (972) 641-3710, or at 
http://www.eurocopter.com.
    (3) You may review copies at the FAA, Office of the Regional 
Counsel, Southwest Region, 2601 Meacham Blvd., Fort Worth, Texas 
76137; 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/ibr-locations.html.

    Issued in Fort Worth, Texas, on September 3, 2010.
Kim Smith,
Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 2010-23098 Filed 9-21-10; 8:45 am]
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