[Federal Register Volume 70, Number 78 (Monday, April 25, 2005)]
[Notices]
[Page 21266]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 05-8137]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


Proposed Advisory Circular 23-13A, Fatigue, Fail-Safe, and Damage 
Tolerance Evaluation of Metallic Structure for Part 23 Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of availability of proposed advisory circular AC 23-13A, 
and request for comments.

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SUMMARY: This notice announces the availability of and requests 
comments on a proposed advisory circular, Advisory Circular (AC) 23-
13A, Fatigue, Fail-Safe, and Damage Tolerance Evaluation of Metallic 
Structure for part 23 Airplanes. The AC provides information and 
guidance on acceptable means, but not the only means of compliance with 
Title 14 of the Code of Federal Regulations (14 CFR) part 23, 
applicable to fatigue, fail-safe, and damage tolerance evaluations of 
metallic structure in normal, utility, aerobatic, and commuter category 
airplanes. The proposed AC is a significant revision to the existing AC 
23-13, incorporating a reader friendly question and answer format, 
updated guidance based on recent policy documents, and updated flight 
load spectra. The proposed AC also provides information on approval of 
continued operational flight with known cracks in the structure of 
small airplanes. Finally, it consolidates existing policy documents, 
and certain technical reports, into a single document. This notice is 
necessary to give all interested people an opportunity to present their 
views on the proposed AC.

DATES: Comments must be received on or before June 24, 2005.

ADDRESSES: If possible, please send your comments electronically to 
[email protected]. Otherwise, send all comments on the proposed AC 
to: Federal Aviation Administration, Attention: Mr. Mike Reyer, ACE-
111, 901 Locust, Kansas City, MO 64106. Comments may be inspected at 
the above address between 7:30 and 4 p.m. weekdays, except Federal 
holidays. All comments should contain the name and telephone number of 
the individual or company making the comment, the paragraph and page 
number that the comment references, the reason for comment, and the 
recommended resolution.

FOR FURTHER INFORMATION CONTACT: Mr. Mike Reyer, Standards Office, 
Small Airplane Directorate, Aircraft Certification Service, Kansas 
City, Missouri 64106, telephone (816) 329-4131, fax (816) 329-4090.

SUPPLEMENTARY INFORMATION:

Comments Invited

    Interested people are invited to comment on the proposed AC by 
submitting such written data, views, or arguments as they may desire. 
Comments should identify AC number 23-13A. Send comments, in duplicate, 
to the address specified above. All communications received on or 
before the closing date for comments will be considered before issuing 
the final AC. The proposed AC can be found and downloaded from the 
Internet at http://www.faa.gov/certification/aircraft in a few days. A 
paper copy of the proposed AC may be obtained by contacting the person 
named above under the caption FOR FURTHER INFORMATION CONTACT.

    Issued in Kansas City, Missouri on April 15, 2005.
Nancy C. Lane,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 05-8137 Filed 4-22-05; 8:45 am]
BILLING CODE 4910-13-P