[Federal Register: June 30, 1998 (Volume 63, Number 125)]
[Notices]               
[Page 35638]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr30jn98-116]                         

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

 
Proposed Advisory Circular 25-XX, Certification of Transport 
Airplane Structure

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 C and D of 14 CFR part 25 regarding the type 
certification requirements for transport airplane structure. 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 October 28, 1998.

ADDRESSES: Send all comments on proposed AC to: Federal Aviation 
Administration, Attention: Jim Haynes, Airframe/Airworthiness Branch, 
ANM-115, 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:
Katherine Burks, Transport Standards Staff, at the address above, 
telephone (206) 227-2114.

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 structure 
that has been modified. In the past, advisory and guidance information 
applicable to transport airplane structure has been formally published 
as ACs. Advisory circulars have not been developed for all of the 
regulatory requirements applicable to transport airplane structure, 
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 June 22, 1998.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service, ANM-100.
[FR Doc. 98-17365 Filed 6-29-98; 8:45 am]
BILLING CODE 4910-13-M