
[Federal Register Volume 76, Number 47 (Thursday, March 10, 2011)]
[Rules and Regulations]
[Pages 13061-13063]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-4468]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-0866; Directorate Identifier 2010-SW-065-AD; 
Amendment 39-16586; AD 2011-03-03]
RIN 2120-AA64


Airworthiness Directives; Bell Helicopter Textron Canada Limited 
Model 427 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 
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:

    Tail rotor driveshaft hanger bearing bracket part number (P/N) 
427-044-223-101 has been found cracked due to fatigue. It has been 
determined that the fatigue cracking was initiated by a tooling mark 
left during manufacture.
    The existence of tooling marks on the bracket could lead to 
bracket failure, loss of tail rotor drive and, consequently, loss of 
control of the helicopter.

We are issuing this AD to require actions to correct the unsafe 
condition on these products.

DATES: This AD becomes effective April 14, 2011.
    On April 14, 2011, the Director of the Federal Register approved 
the incorporation by reference of certain publications listed in this 
AD.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov or in person at 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 service information identified in this AD, contact Bell 
Helicopter Textron, Inc., P.O. Box 482, Fort Worth, TX 76101; 
telephone: (817) 280-2011; fax: (817) 280-2321; or at http://www.bellhelicopter.com. You may review copies of the referenced service 
information at the FAA, Office of the Regional Counsel, Southwest 
Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137.

FOR FURTHER INFORMATION CONTACT: Sharon Miles, Aerospace Engineer, FAA, 
Rotorcraft Directorate, 2601 Meacham Blvd., Fort Worth, Texas 76137; 
telephone: (817) 222-5122; fax: (817) 222-5961.

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 August 30, 2010 (75 
FR 52912). That NPRM proposed to correct an unsafe condition for the 
specified products. The MCAI states:


[[Page 13062]]


    Tail rotor driveshaft hanger bearing bracket part number (P/N) 
427-044-223-101 has been found cracked due to fatigue. It has been 
determined that the fatigue cracking was initiated by a tooling mark 
left during manufacture.
    The existence of tooling marks on the bracket could lead to 
bracket failure, loss of tail rotor drive and, consequently, loss of 
control of the helicopter.

    The MCAI requires you to rework the tail rotor driveshaft hanger 
bearing bracket.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We received no comments on the NPRM or on the determination of 
the cost to the public.

Conclusion

    We reviewed the available data and determined that air safety and 
the public interest require adopting the AD as proposed.

Differences Between This AD and the MCAI or Service Information

    We have reviewed the MCAI and related service information and, in 
general, agree with their substance. But we might have found it 
necessary to use different words from those in the MCAI to ensure the 
AD is clear for U.S. operators and is enforceable. In making these 
changes, we do not intend to differ substantively from the information 
provided in the MCAI and related service information.
    We might also have required different actions in this AD from those 
in the MCAI in order to follow FAA policies. Any such differences are 
highlighted in a Note within the AD.

Costs of Compliance

    We estimate that this AD will affect 30 products of U.S. registry. 
We also estimate that it will take about 4 work-hours per product to 
comply with the basic requirements of this AD. The average labor rate 
is $85 per work-hour.
    Based on these figures, we estimate the cost of this AD to the U.S. 
operators to be $10,200 or $340 per product.
    In addition, we estimate that any necessary follow-on actions would 
require parts costing $5,034, for a cost of $5,034 per product. We have 
no way of determining the number of products that may need these 
actions.

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 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 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 Management Facility 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains the NPRM, the regulatory evaluation, 
any comments received, and other information. The street address for 
the Docket Office (telephone (800) 647-5527) is 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

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:

2011-03-03 Bell Helicopter Textron Canada Limited: Amendment 39-
16586; Docket No. FAA-2010-0866; Directorate Identifier 2010-SW-065-
AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective April 
14, 2011.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Bell Helicopter Textron Canada Limited 
Model 427 helicopters, all serial numbers (SNs), certificated in any 
category.

Subject

    (d) Air Transport Association of America (ATA) Code 65: Tail 
Rotor Drive.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:
    Tail rotor driveshaft hanger bearing bracket part number (P/N) 
427-044-223-101 has been found cracked due to fatigue. It has been 
determined that the fatigue cracking was initiated by a tooling mark 
left during manufacture.
    The existence of tooling marks on the bracket could lead to 
bracket failure, loss of tail rotor drive and, consequently, loss of 
control of the helicopter.

The MCAI requires you to rework the tail rotor driveshaft hanger 
bearing bracket.

Actions and Compliance

    (f) Unless already done, do the following actions:
    (1) Applicable to SNs 56001 through 56073, and 56077: Within 30 
days after April 14, 2011 (the effective date of this AD), inspect 
both sides of the hanger bracket, P/N 427-044-223-101, for cracks 
following Bell Helicopter Alert Service Bulletin No. 427-09-29, REV 
A, dated November 17, 2009.
    (i) If no cracks are found during the inspection required by 
paragraph (f)(1) of this AD, before further flight, rework both 
sides of the hanger bracket, P/N 427-044-223-101, following Bell 
Helicopter Alert Service Bulletin No. 427-09-29, REV A, dated 
November 17, 2009.
    (ii) If cracks are found during the inspection required by 
paragraph (f)(1) of this AD, before further flight, replace the 
hanger bracket, P/N 427-044-223-101, with a new hanger bracket, P/N 
427-044-223-101, that has been reworked following Bell Helicopter

[[Page 13063]]

Alert Service Bulletin No. 427-09-29, REV A, dated November 17, 
2009.
    (2) Applicable to all SNs: As of April 14, 2011 (the effective 
date of this AD), you may not install replacement tail rotor 
driveshaft hanger bracket, P/N 427-044-223-101, unless the bracket 
has been inspected and found free of cracks and has been reworked 
following Bell Helicopter Alert Service Bulletin No. 427-09-29, REV 
A, dated November 17, 2009.

FAA AD Differences

    Note:  This AD differs from the MCAI and/or service information 
as follows: No differences.

Other FAA AD Provisions

    (g) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
Standards Office, FAA, has the authority to approve AMOCs for this 
AD, if requested using the procedures found in 14 CFR 39.19. Send 
information to ATTN: Sharon Miles, Aerospace Engineer, FAA, 
Rotorcraft Directorate, 2601 Meacham Blvd., Fort Worth, Texas 76137; 
telephone: (817) 222-5122; fax: (817) 222-5961. Before using any 
approved AMOC on any airplane to which the AMOC applies, notify your 
appropriate principal inspector (PI) in the FAA Flight Standards 
District Office (FSDO), or lacking a PI, your local FSDO.
    (2) Airworthy Product: For any requirement in this AD to obtain 
corrective actions from a manufacturer or other source, use these 
actions if they are FAA-approved. Corrective actions are considered 
FAA-approved if they are approved by the State of Design Authority 
(or their delegated agent). You are required to assure the product 
is airworthy before it is returned to service.
    (3) Reporting Requirements: For any reporting requirement in 
this AD, a federal agency may not conduct or sponsor, and a person 
is not required to respond to, nor shall a person be subject to a 
penalty for failure to comply with a collection of information 
subject to the requirements of the Paperwork Reduction Act unless 
that collection of information displays a current valid OMB Control 
Number. The OMB Control Number for this information collection is 
2120-0056. Public reporting for this collection of information is 
estimated to be approximately 5 minutes per response, including the 
time for reviewing instructions, completing and reviewing the 
collection of information. All responses to this collection of 
information are mandatory. Comments concerning the accuracy of this 
burden and suggestions for reducing the burden should be directed to 
the FAA at: 800 Independence Ave., SW., Washington, DC 20591, Attn: 
Information Collection Clearance Officer, AES-200.

Related Information

    (h) Refer to MCAI Transport Canada AD No. CF-2010-17, dated June 
2, 2010; and Bell Helicopter Alert Service Bulletin No. 427-09-29, 
REV A, dated November 17, 2009, for related information.

Material Incorporated by Reference

    (i) You must use Bell Helicopter Alert Service Bulletin No. 427-
09-29, REV A, dated November 17, 2009, 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 Bell 
Helicopter Textron, Inc., P.O. Box 482, Fort Worth, TX 76101; 
telephone: (817) 280-2011; fax: (817) 280-2321; or at http://www.bellhelicopter.com.
    (3) You may review copies of the referenced service information 
at the FAA, Office of the Regional Counsel, Southwest Region, 2601 
Meacham Blvd., Room 663, Fort Worth, Texas 76137. 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 Fort Worth, Texas, on January 13, 2011.
Kim Smith,
Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 2011-4468 Filed 3-9-11; 8:45 am]
BILLING CODE 4910-13-P


