[Federal Register Volume 71, Number 225 (Wednesday, November 22, 2006)]
[Proposed Rules]
[Pages 67506-67508]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E6-19801]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-26236; Directorate Identifier 2006-CE-66-AD]
RIN 2120-AA64


Airworthiness Directives; SOCATA--Groupe AEROSPATIALE Models TB 
20 and TB 21 Airplanes

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

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for the 
products listed above. This proposed 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 reports of interference between the wing spar lower boom 
and the wheel fairing attaching screw. The proposed AD would require 
actions that are intended to address the unsafe condition described in 
the MCAI.

DATES: We must receive comments on this proposed AD by December 22, 
2006.

ADDRESSES: You may send comments by any of the following methods:
     DOT Docket Web Site: Go to http://dms.dot.gov and follow 
the instructions for sending your comments electronically.
     Fax: (202) 493-2251.
     Mail: Docket Management Facility, U.S. Department of 
Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401, 
Washington, DC 20590-0001.
     Hand Delivery: Room PL-401 on the plaza level of the 
Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
     Federal eRulemaking Portal: http://www.regulations.gov. 
Follow the instructions for submitting comments.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://dms.dot.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 proposed AD, the regulatory evaluation, any 
comments received, and other information. The street address for the 
Docket Office (telephone (800) 647-5227) is in the ADDRESSES section. 
Comments will be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Doug Rudolph, Aerospace Engineer, FAA, 
Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 
64106; telephone: (816) 329-4059; fax: (816) 329-4090.

SUPPLEMENTARY INFORMATION: 

Streamlined Issuance of AD

    The FAA is implementing a new process for streamlining the issuance 
of ADs related to MCAI. The streamlined process will allow us to adopt 
MCAI safety requirements in a more efficient manner and will reduce 
safety risks to the public. This process continues to follow all FAA AD 
issuance processes to meet legal, economic, Administrative Procedure 
Act, and Federal Register requirements. We also continue to meet our 
technical decision-making responsibilities to identify and correct 
unsafe conditions on U.S.-certificated products.
    This proposed AD references the MCAI and related service 
information that we considered in forming the engineering basis to 
correct the unsafe condition. The proposed AD contains text copied from 
the MCAI and for this reason might not follow our plain language 
principles.

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2006-
26236; Directorate Identifier 2006-CE-66-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD because of those comments.
    We will post all comments we receive, without change, to http://dms.dot.gov, including any personal information you provide. We will 
also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    The European Aviation Safety Agency (EASA), which is the Technical 
Agent for the Member States of the European Community, has issued AD 
No.: 2006-0123, dated May 16, 2006 (referred to after this as ``the 
MCAI''), to correct an unsafe condition for the specified

[[Page 67507]]

products. The MCAI states there are reports of interference between the 
wing spar lower boom and the wheel fairing attaching screw causing an 
unsafe condition. The interference could, if left uncorrected, reduce 
the fatigue life of the wing spar with potentially catastrophic 
results. The MCAI requires inspections and repairs as necessary to 
correct this unsafe condition. You may obtain further information by 
examining the MCAI in the AD docket.

Relevant Service Information

    EADS SOCATA has issued TB Aircraft Mandatory Service Bulletin SB 
10-148, ATA No. 57, dated December 2005. The actions described in this 
service information are intended to correct the unsafe condition 
identified in the MCAI.

FAA's Determination and Requirements of the Proposed AD

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to our bilateral agreement with this State of Design Authority, they 
have notified us of the unsafe condition described in the MCAI and 
service information referenced above. We are proposing this AD because 
we evaluated all information and determined the unsafe condition exists 
and is likely to exist or develop on other products of the same type 
design.

Differences Between This Proposed 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 proposed different actions in this AD from those 
in the MCAI in order to follow FAA policies. Any such differences are 
described in a separate paragraph of the proposed AD. These 
requirements, if ultimately adopted, will take precedence over the 
actions copied from the MCAI.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD 
would affect about 270 products of U.S. registry. We also estimate that 
it would take about 15 work-hours per product to comply with the 
proposed AD. The average labor rate is $80 per work-hour. Required 
parts would cost about $15,000 per product. Where the service 
information lists required parts costs that are covered under warranty, 
we have assumed that there will be no charge for these costs. As we do 
not control warranty coverage for affected parties, some parties may 
incur costs higher than estimated here. Based on these figures, we 
estimate the cost of the proposed AD on U.S. operators to be 
$4,374,000, or $16,200 per product.

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 proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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 proposed 
regulation:
    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 a regulatory evaluation of the estimated costs to 
comply with this proposed AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 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.


Sec.  39.13  [Amended]

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

SOCATA--Groupe Aerospatiale: Docket No. FAA-2006-26236; Directorate 
Identifier 2006-CE-66-AD.

Comments Due Date

    (a) We must receive comments by December 22, 2006.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to SOCATA Models TB 20 and TB 21 airplanes, 
serial numbers 1 through 9999 without repair REP 20.031 implemented 
on both sides, certificated in any category.

Reason

    (d) The mandatory continuing airworthiness information (MCAI) 
states there are reports of interference between the wing spar lower 
boom and the wheel fairing attaching screw causing an unsafe 
condition. The interference could, if left uncorrected, reduce the 
fatigue life of the wing spar with potentially catastrophic results. 
The MCAI requires inspections and repairs as necessary to correct 
this unsafe condition.

Actions and Compliance

    (e) Unless already done, do the following actions.
    (1) Within the next 100 hours time-in-service or 12 months after 
the effective date of this AD, whichever occurs first, perform an 
inspection of the wing spar lower boom and repair it as necessary, 
in accordance with the accomplishment instructions of the EADS 
SOCATA TB Aircraft Mandatory Service Bulletin SB 10-148, ATA No. 57, 
dated December 2005.
    (2) If defect dimensions exceed the acceptable values given in 
the EADS SOCATA TB Aircraft Mandatory Service Bulletin SB 10-148, 
ATA No. 57, dated December 2005, or if the defect is not located in 
areas depicted in figure 2 of the EADS SOCATA TB Aircraft Mandatory 
Service Bulletin SB 10-148, ATA No. 57, dated December 2005, then 
the Type 1 or Type 2 repair solutions are not applicable. A written 
report shall be sent to the manufacturer as mentioned in section A.5 
of the EADS

[[Page 67508]]

SOCATA TB Aircraft Mandatory Service Bulletin SB 10-148, ATA No. 57, 
dated December 2005. In this case, all flight is prohibited until 
EADS SOCATA provides a repair solution or otherwise agrees to 
further flight.

FAA AD Differences

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

Other FAA AD Provisions

    (f) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
Standards Staff, FAA, ATTN: Doug Rudolph, Aerospace Engineer, FAA, 
Small Airplane Directorate, 901 Locust, Room 301, Kansas City, 
Missouri 64106; telephone: (816) 329-4059; fax: (816) 329-4090, has 
the authority to approve AMOCs for this AD, if requested using the 
procedures found in 14 CFR 39.19.
    (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, under the provisions of the Paperwork Reduction Act (44 
U.S.C. 3501 et seq.), the Office of Management and Budget (OMB) has 
approved the information collection requirements and has assigned 
OMB Control Number 2120-0056.

Related Information

    (g) Refer to European Aviation Safety Agency (EASA) 
Airworthiness Directive No.: 2006-0123, dated May 16, 2006; and EADS 
SOCATA TB Aircraft Mandatory Service Bulletin SB 10-148, ATA No. 57, 
dated December 2005, for related information.

    Issued in Kansas City, Missouri, on November 14, 2006.
Steven W. Thompson,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
 [FR Doc. E6-19801 Filed 11-21-06; 8:45 am]
BILLING CODE 4910-13-P