[Federal Register Volume 63, Number 179 (Wednesday, September 16, 1998)]
[Notices]
[Pages 49631-49632]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-24853]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


Proposed Advisory Circular 25-XX, Certification of Transport 
Airplane Electrical Equipment Installations

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 type of 
certification requirements for transport airplane electrical systems 
and equipment installations. 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 January 14, 1999.

ADDRESSES: Send all comments on proposed AC to: Federal Aviation 
Administration, Attention: John McGraw, Manager, Airplane and 
Flightcrew Interface Branch, ANM-111,

[[Page 49632]]

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 (425) 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 advisory circular applies to Part 25 of the Federal Aviation 
Regulations for transport category airplanes for which a new, amended, 
or supplemental type certificate is requested. The policy extracts 
contained in the AC are presented in order to provide guidelines which 
can help in understanding and resolving certification issues or making 
approval decisions. In the past, advisory and guidance information 
applicable to transport airplane electrical systems and equipment 
installations has been formally published within ACs. However in many 
instances policy has been developed and applied to specific 
certification projects without formal publication. This policy was 
documented in the form of policy memorandums, issue papers which were 
distributed to the FAA Aircraft Certification Offices, or in the form 
of letters sent to commercial companies, other U.S. government 
agencies, U.S. Congressional representatives, or foreign certification 
and airworthiness authorities. In many instances this information was 
not organized in a way that allowed easy access. This AC is intended to 
document existing policy so that the public and FAA personnel have 
access to this information. The excerpts from memoranda and letters 
provided in this AC represent historical views of regulations and 
requirements which may have evolved since the issue of policy in the 
extract, and may be applicable to a specific airplane model depending 
on the certification basis. The applicant and the cognizant 
certificating authority are advised to check and ensure, at the 
earliest practical moment, that a specific policy extract applies to 
any specific airplane type certification programs.

    Issued in Renton, Washington, on September 8, 1998.
Ronald T. Wojnar,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service, ANM-100.
[FR Doc. 98-24853 Filed 9-15-98; 8:45 am]
BILLING CODE 4910-13-M