# Advisory Circular (AC) 25.613-1, Material Strength Properties and Material Design Values
**AGENCY:**
Federal Aviation Administration (FAA), DOT.
**ACTION:**
Notice of issuance of advisory circular.
**SUMMARY:**
The Federal Aviation Administration announces the issuance of Advisory Circular (AC) 25.613-1, “Material Strength Properties and Material Design Values.” The advisory circular provides guidance related to a recently published amendment concerning material strength properties and material design values for transport category airplanes.
**DATES:**
Advisory Circular 25.613-1 was issued by the FAA Transport Airplane Directorate on August 6, 2003.
*How to Obtain Copies:* An electronic copy of AC 25.613-1 can be downloaded from the Internet at *http://www.airweb.faa.gov/rgl* by taking the following steps: Click on “Advisory Circulars.” Under “Search Help” click on “Current ACs by Number.” A paper copy will be available in approximately 6-8 weeks from the U.S. Department of Transportation, subsequent distribution Office, DOT Warehouse, SVC-121.23, Ardmore East Business Center, 3341Q 75th Avenue, Landover, MD 20785, telephone 301-322-5377, or by faxing your request to the warehouse at 301-386-5394.
Issued in Renton, Washington, on August 6, 2003.
Vi L. Lipski,
Manager, Transport Airplane Directorate, Aircraft Certification Service.