[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]
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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.
[[Page 68498]]
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]
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