[Federal Register Volume 66, Number 96 (Thursday, May 17, 2001)]
[Notices]
[Page 27589]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 01-12197]



  Federal Register / Vol. 66, No. 96 / Thursday, May 17, 2001 / 
Notices  

[[Page 27589]]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


Proposed Advisory Circular 25.1353-1X, Electrical Equipment and 
Installations

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of availability of proposed Advisory Circular (AC) 
25.1353-1X and request for comments.

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SUMMARY: This notice announces the availability of and requests comment 
on a proposed advisory circular (AC) that provides methods acceptable 
to the Administrator for showing compliance with the airworthiness 
standards for electrical equipment on transport category airplanes. The 
guidance provided in the AC supplements the engineering and operational 
judgment that must form the basis of any compliance findings relative 
to electrical installation and nickel cadmium installation to minimize 
the hazards to an airplane. 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 June 15, 2001.

ADDRESSES: Send all comments on the proposed AC to: Federal Aviation 
Administration, Attn: Stephen Slotte, FAA, Transport Airplane 
Directorate, Aircraft Certification Service, Airplane and Flightcrew 
Branch, ANM-111, 1601 Lind Avenue SW., Renton, Washington 98055-4056. 
Comments may be inspected at the above address between 7:30 a.m. and 4 
p.m. weekdays, except Federal holidays.

FOR FURTHER INFORMATION CONTACT: Susan Boylon, Standardization Branch, 
ANM-113, Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., 
Renton, Washington 98055-4056; telephone (425) 227-1152.

SUPPLEMENTARY INFORMATION:

Comments Invited

    Interested persons are invited to comment on the proposed AC by 
submitting such written data, views, or arguments as they may desire. 
Commenters must identify the AC by title and submit comments in 
duplicate to the address specified above. The Transport Airplane 
Directorate will consider all communications received on or before the 
closing date for comments before issuing the final AC.

Availability of Proposed AC

    The proposed AC can be found and downloaded from the Internet at 
http://www.faa.gov/avr/air/airhome.htm, at the link titled ``Draft 
AC's'' under the ``Available Information'' drop-down menu. A paper copy 
of the proposed AC may be obtained by contacting the person named above 
under the caption FOR FURTHER INFORMATION CONTACT.

Discussion

    Proposed AC 25.1353-1X, ``Electrical Equipment and Installations,'' 
has been prepared to provide guidance on one means of demonstrating 
compliance with the requirements of Sec. 25.1353, ``Electrical 
Equipment and Installations,'' of Title 14, Code of Federal Regulations 
(CFR) part 25, commonly referred to as part 25 of the Federal Aviation 
Regulations (FAR). Part 25 contains the airworthiness standards 
applicable to transport category airplanes.
    The means of compliance described in proposed AC 25.1353-1X is 
intended to provide guidance to supplement the engineering and 
operational judgment that must form the basis of any compliance 
findings relative to paragraph Secs. 25.1353(a) and 25.1353(c)(6). 
These paragraphs concern electrical equipment, nickel cadmium battery 
installations, and nickel cadmium battery storage.
    In accordance with the requirements of Sec. 25.1353(a), show 
compliance by considering the following sources of interference:
    a. Conducted and radiated interference caused by electrical noise 
generation from apparatus connected to the busbars,
    b. Coupling between electrical cables or between cables and aerial 
feeders,
    c. Malfunctioning of electrically-powered apparatus,
    d. Parasitic currents and voltages in the electrical distribution 
and earth systems, including the affects of lightning currents or 
static discharge,
    e. Difference frequencies between generating or other systems, and
    f. The requirements of Sec. 25.1309 should also be satisfied.
    In accordance with the requirements Sec. 25.1353(c)(6)(ii) and 
(iii), show compliance by demonstrating the following:
    a. Where temperature sensing and over-temperature warning devices 
are installed to comply with Sec. 25.1353(c)(6)(ii) or (iii), their 
correct operations should be verified at agreed maintenance intervals 
in addition to compliance with Sec. 25.1309(a) and (b).

Harmonization of Standards and Guidance

    The proposed AC is based on recommendations submitted to the FAA by 
the Aviation Rulemaking Advisory Committee (ARAC). The FAA tasked ARAC 
(63 FR 50954, September 23, 1998) to provide advice and recommendations 
on ``harmonizing'' certain sections of part 25 with the counterpart 
standards contained in Joint Aviation Requirements (JAR) 25. The goal 
of ``harmonization tasks,'' such as this, is to ensure that:
     Where possible, standards and guidance do not require 
domestic and foreign parties to manufacture or operate to different 
standards for each country involved; and
     The standards and guidance adopted are mutually acceptable 
to the FAA and the foreign aviation authorities.
    The guidance contained in the proposed AC has been harmonized with 
that of the JAA, and provides a method of compliance that has been 
found acceptable to both the FAA and JAA.

    Issued in Renton, Washington, on May 3, 2001.
Lirio Liu Nelson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 01-12197 Filed 5-16-01; 8:45 am]
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