[Federal Register Volume 63, Number 178 (Tuesday, September 15, 1998)] [Notices] [Pages 49377-49378] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 98-24707] ======================================================================= ----------------------------------------------------------------------- DEPARTMENT OF TRANSPORTATION Federal Aviation Administration Advisory Circular 25.629-1A, Aeroelastic Stability Substantiation of Transport Category Airplanes AGENCY: Federal Aviation Administration, DOT. ACTION: Notice of issuance of advisory circular. ----------------------------------------------------------------------- SUMMARY: This notice announces the issuance of Advisory Circular (AC) 25.629-1A, Aeroelastic Stability Substantiation of Transport Category Airplanes. This AC provides guidance material for acceptable means, but not the only means, of demonstrating compliance with the provisions of part 25 of the Federal Aviation Regulations (FAR) dealing with the design requirements for transport category airplanes to preclude the aeroelastic instabilities of flutter, divergence and control reversal. DATES: Advisory Circular 25.639-2A was issued by the Manager, Transport Airplane Directorate, Aircraft Certification Service, ANM-100, on July 23, 1998. HOW TO OBTAIN COPIES: A copy may be obtained by writing to the U.S. [[Page 49378]] Department of Transportation, Subsequent Distribution Office, DOT Warehouse, SVC-121.23, 3341Q 75th Ave., Landover, MD 20785, telephone 301-322-5377, or faxing your request to the warehouse at 301-386-5394. Issued in Renton, Washington, on September 4, 1998. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service, ANM-100. [FR Doc. 98-24707 Filed 9-14-98; 8:45 am] BILLING CODE 4910-13-M