[Federal Register Volume 66, Number 219 (Tuesday, November 13, 2001)]
[Notices]
[Page 56896]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 01-28377]



[[Page 56896]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


Advisory Circular 20-66A, Vibration and Fatigue Evaluation of 
Airplane Propellers

AGENCY: Federal Aviation (FAA), DOT.

ACTION: Notice of issuance of advisory circular.

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SUMMARY: This notice announces the issuance of Advisory Circular (AC) 
20-66A, titled ``Vibration and Fatigue Evaluation of Airplane 
Propellers''. This advisory circular (AC) provides guidance and 
describes one method, but not the only method, for demonstrating 
compliance with Secs. 23.907 and 25.907 of Title 14 of the Code of 
Federal Regulations, for the evaluation of vibration stresses on 
propellers installed on airplanes. Like all AC material, this AC is 
not, in itself, mandatory and does not constitute a regulation. While 
these guidelines are not mandatory, they are derived from extensive 
Federal Aviation Administration (FAA) and industry experience in 
determining compliance with the pertinent regulations.

DATES: Advisory Circular 20-66A was issued by the Manager, Engine and 
Propeller Directorate, Aircraft Certification Office, ANE-100, on 
September 17, 2001.
    How to Obtain Copies: A paper copy of AC 20-66A may be obtained by 
writing to the U.S. Department of Transportation, Subsequent 
Distribution Office, DOT Warehouse, SVC-121.23, Ardmore East Business 
Center, 3341Q 75th Ave., Landover, MD 20785, telephone 301-322-5377, or 
by faxing your request to the warehouse at 301-386-5394. The AC will 
also be available on the Internet at http://www.faa.gov/avr/air/airhome.htm, at the link titled ``Advisory Circulars'' under the 
``Available Information'' down-drop menu.

    Issued in Burlington, Massachusetts on October 23, 2001.
Thomas Boudreau,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 01-28377 Filed 11-9-01; 8:45 am]
BILLING CODE 4910-13-M