Interim Guidelines for Certification and Continued Airworthiness of Unbalanced Control Surfaces With Freeplay and Other Nonlinear Features, 21090 [06-3858]

Download as PDF 21090 Federal Register / Vol. 71, No. 78 / Monday, April 24, 2006 / Notices Form(s): FAA Form 8070–1. Affected Public: A total of 2426 respondents. Frequency: The information is collected on an as-needed basis. Estimated Average Burden Per Response: Approximately 30 minutes per response, depending on the activity. Estimated Annual burden Hours: an estimated 1,147,928 hours annually. Abstract: Title 49 U.S.C. 44702, authorizes the issuance of air carrier operating certificates. 14 CFR part 135 prescribes requirements for Air Carrier/ Commercial Operators. The information collected shows compliance and applicant eligibility. ADDRESSES: Send comments to the Office of Information and Regulatory Affairs, Office of management and Budget, 725 17th Street, NW., Washington, DC 20503, Attention FAA Desk Officer. Comments are invited on: Whether the proposed collection of information is necessary for the proper performance of the functions of the Department, including whether the information will have practical utility; the accuracy of the Department’s estimates of the burden of the proposed information collection; ways to enhance the quality, utility and clarity of the information to be collected; and ways to minimize the burden of the collection of information on respondents, including the use of automated collection techniques or other forms of information technology. Issued in Washington, DC, on April 18, 2006. Judith D. Street, FAA Information Collection Clearance Officer, Information Systems and Technology Services Staff, ABA–20. [FR Doc. 06–3857 Filed 4–21–06; 8:45 am] BILLING CODE 4910–13–M DEPARTMENT OF TRANSPORTATION Federal Aviation Administration [Policy Statement No. ANM–05–115–019] Interim Guidelines for Certification and Continued Airworthiness of Unbalanced Control Surfaces With Freeplay and Other Nonlinear Features Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed interim guidelines; request for comments. rmajette on PROD1PC67 with NOTICES AGENCY: SUMMARY: The Federal Aviation Administration (FAA) announces the availability of proposed Interim Guidelines for Certification and Continued Airworthiness of Unbalanced VerDate Aug<31>2005 14:56 Apr 21, 2006 Jkt 208001 Control Surfaces with Freeplay and Other Nonlinear Features. DATES: Send your comments on or before May 25, 2006. ADDRESSES: Address your comments to the individual identified under FOR FURTHER INFORMATION CONTACT. FOR FURTHER INFORMATION CONTACT: Gerald Lakin, Federal Aviation Administration, Transport Airplane Directorate, Transport Standards Staff, Standardization Branch, ANM–113, 1601 Lind Avenue, SW., Renton, WA 98055–4056; telephone (425) 227–1187; fax (425) 227–1320; e-mail: gerald.lakin@faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited The proposed memorandum is available on the Internet at the following addresses: https://www.airweb.faa.gov/ rgl, and https://www.faa.gov/aircraft/ draft_docs. If you do not have access to the Internet, you can obtain a copy of the proposed memorandum by contacting the person listed under FOR FURTHER INFORMATION CONTACT. The FAA invites your comments on this proposed memorandum. We will accept your comments, data, views, or arguments by letter, fax, or e-mail. Send your comments to the person indicated in FOR FURTHER INFORMATION CONTACT. Mark your comments, ‘‘Comments to Policy Statement No. ANM–05–115– 019.’’ Use the following format when preparing your comments: • Organize your comments issue-byissue. • For each issue, state what specific change you are requesting to the proposed interim guidelines. • Include justification, reasons, or data for each change you are requesting. We also welcome comments in support of the proposed interim guidelines. We will consider all communications received on or before the closing date for comments. We may change the proposed interim guidelines because of the comments received. Background This memorandum clarifies FAA guidance on the design, certification, and continued airworthiness of control surfaces that rely on retention of restraint stiffness for flutter prevention. These control surfaces typically do not have added mass balance, but there are some that are partially mass balanced for which the guidelines would also apply. This memorandum provides acceptable means of establishing and certifying freeplay limits and inspection PO 00000 Frm 00122 Fmt 4703 Sfmt 4703 procedures, provides guidance for managing freeplay over the airplane service life, and provides a means of finding compliance for control system designs whose failure can result in a nonlinear aeroelastic configuration and limit cycle oscillation (LCO). This memorandum provides interim guidelines and standardized methods of compliance that address the inadequacies of current guidance, until the FAA revises the applicable guidance contained in AC 25.629–1A. Issued in Renton, Washington, on April 9, 2006. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 06–3858 Filed 4–21–06; 8:45 am] BILLING CODE 4910–13–M DEPARTMENT OF TRANSPORTATION Maritime Administration [Docket No: MARAD 2006–24149] Availability of a Draft FONSI/FONPA Department of Transportation, Maritime Administration. ACTION: Notice of the Availability of a draft Finding of No Significant Impact/ Finding of No Practicable Alternative. AGENCY: SUMMARY: The purpose of this Notice is to make available to the public the draft Finding of No Significant Impact/ Finding of No Practicable Alternative (FONSI/FONPA) for the Port of Anchorage Intermodal Expansion, North End Runway Material Extraction and Transport Project (Project). A draft Environmental Assessment (EA), dated March 2006, was prepared that analyzed the potential impacts on the human and natural environment associated with the proposed material extraction activities at the North End Borrow Site and potential transportation corridors located on Elmendorf Air Force Base (EAFB). A final EA and a final FONSI/FONPA will be published once comments have been properly addressed. This environmental documentation supports the proposed expansion of the Port of Anchorage (POA), which includes a variety of activities to enhance the transportation of goods and people within the State of Alaska. DATES: Comments on this draft FONSI/ FONPA must be received by May 24, 2006. You may submit comments [identified by DOT DMS Docket Number MARAD–2006–24149] by any of the following methods: ADDRESSES: E:\FR\FM\24APN1.SGM 24APN1

Agencies

[Federal Register Volume 71, Number 78 (Monday, April 24, 2006)]
[Notices]
[Page 21090]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 06-3858]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

[Policy Statement No. ANM-05-115-019]


Interim Guidelines for Certification and Continued Airworthiness 
of Unbalanced Control Surfaces With Freeplay and Other Nonlinear 
Features

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed interim guidelines; request for comments.

-----------------------------------------------------------------------

SUMMARY: The Federal Aviation Administration (FAA) announces the 
availability of proposed Interim Guidelines for Certification and 
Continued Airworthiness of Unbalanced Control Surfaces with Freeplay 
and Other Nonlinear Features.

DATES: Send your comments on or before May 25, 2006.

ADDRESSES: Address your comments to the individual identified under FOR 
FURTHER INFORMATION CONTACT.

FOR FURTHER INFORMATION CONTACT: Gerald Lakin, Federal Aviation 
Administration, Transport Airplane Directorate, Transport Standards 
Staff, Standardization Branch, ANM-113, 1601 Lind Avenue, SW., Renton, 
WA 98055-4056; telephone (425) 227-1187; fax (425) 227-1320; e-mail: 
gerald.lakin@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

    The proposed memorandum is available on the Internet at the 
following addresses: https://www.airweb.faa.gov/rgl, and https://
www.faa.gov/aircraft/draft_docs. If you do not have access to the 
Internet, you can obtain a copy of the proposed memorandum by 
contacting the person listed under FOR FURTHER INFORMATION CONTACT.
    The FAA invites your comments on this proposed memorandum. We will 
accept your comments, data, views, or arguments by letter, fax, or e-
mail. Send your comments to the person indicated in FOR FURTHER 
INFORMATION CONTACT. Mark your comments, ``Comments to Policy Statement 
No. ANM-05-115-019.''
    Use the following format when preparing your comments:
     Organize your comments issue-by-issue.
     For each issue, state what specific change you are 
requesting to the proposed interim guidelines.
     Include justification, reasons, or data for each change 
you are requesting.
    We also welcome comments in support of the proposed interim 
guidelines.
    We will consider all communications received on or before the 
closing date for comments. We may change the proposed interim 
guidelines because of the comments received.

Background

    This memorandum clarifies FAA guidance on the design, 
certification, and continued airworthiness of control surfaces that 
rely on retention of restraint stiffness for flutter prevention. These 
control surfaces typically do not have added mass balance, but there 
are some that are partially mass balanced for which the guidelines 
would also apply. This memorandum provides acceptable means of 
establishing and certifying freeplay limits and inspection procedures, 
provides guidance for managing freeplay over the airplane service life, 
and provides a means of finding compliance for control system designs 
whose failure can result in a nonlinear aeroelastic configuration and 
limit cycle oscillation (LCO). This memorandum provides interim 
guidelines and standardized methods of compliance that address the 
inadequacies of current guidance, until the FAA revises the applicable 
guidance contained in AC 25.629-1A.

    Issued in Renton, Washington, on April 9, 2006.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 06-3858 Filed 4-21-06; 8:45 am]
BILLING CODE 4910-13-M
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