[Federal Register Volume 63, Number 238 (Friday, December 11, 1998)] [Notices] [Pages 68497-68498] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 98-32967] ======================================================================= ----------------------------------------------------------------------- DEPARTMENT OF TRANSPORTATION Federal Aviation Administration Proposed Advisory Circular 25-XX, Certification of Transport Airplane Mechanical Systems
Agency
Federal Aviation Administration, DOT.
Action
Notice of availability of proposed Advisory Circular (AC) 25-XX and request for comments.
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Summary
This notice announces the availability of and requests comments on a proposed advisory circular (AC) which provides methods acceptable to the Administrator for showing compliance with the provisions of subparts D and F of 14 CFR part 25 regarding the type certification requirements for transport airplane mechanical systems. This notice is necessary to give all interested persons an opportunity to present their views on the proposed AC.
Dates
Comments must be received on or before April 12, 1999.
Addresses
Send all comments on proposed AC to: Federal Aviation Administration, Attention: Mahinder Wahi, Propulsion/Mechanical Systems/Crashworthiness/Noise Branch, ANM-112, Transport Airplane Directorate, Aircraft Certification Service, 1601 Lind Avenue SW, Renton, WA 98055-4056. Comments may be inspected at the above address between 7:30 a.m. and 4:00 p.m. weekdays, except Federal holidays.
For Further Information Contact
Toni Jackson, Transport Standards Staff, at the address above, telephone (425) 227-2112.
Supplementary Information
Comments Invited
A copy of the draft AC may be obtained by contacting the person named above under FOR FURTHER INFORMATION CONTACT. Interested persons are invited to comment on the proposed AC by submitting such written data, views, or arguments as they may desire. Commenters should identify AC 25-XX, and submit comments, in duplicate, to the address specified above. All communications received on or before the closing date for comments will be considered by the Transport Standards Staff before issuing the final AC.
Discussion
This AC contains guidance for the latest amendment of the regulations and applies to all transport category airplanes for which a new, amended, or supplemental type certificate is required. This guidance should be applied to any portion of the airplane mechanical systems that has been modified. In the past, advisory and guidance information applicable to transport airplane mechanical systems has been formally published as AC's. Advisory circulars have not been developed for all of the regulatory requirements applicable to transport airplane mechanical systems, however. In many instances, certification of new technology airplanes resulted in the need to interpret the existing regulations and to apply new regulations. Issue papers and special conditions were generated to document the compliance method agreed upon between the applicant and the FAA. In other instances, applicants, FAA Aircraft Certification Office (ACO) managers, and foreign regulatory authorities have requested interpretation of the intent of specific regulations. This guidance was documented in the form of policy memorandums that were distributed to all ACOs, letters to applicants and foreign airworthiness authorities, and issue papers. In many instances, this information was not organized in a manner that allowed easy access, and applicants were not aware of revised policy. This AC formalizes existing policy so that the public and FAA personnel have access to this information. The methods and procedures described in this AC have evolved after many years and represents current certification practice.
Issued in Renton, Washington, on November 30, 1998. John J. Hickey, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service, ANM-100. [FR Doc. 98-32967 Filed 12-10-98; 8:45 am] BILLING CODE 4910-13-M