Federal Register / Vol. 66, No. 96 / Thursday, May 17, 2001 / Notices 27589

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.

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 § 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 §§ 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 § 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 electricallypowered 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 § 25.1309

should also be satisfied.

In accordance with the requirements

§ 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

§ 25.1353(c)(6)(ii) or (iii), their correct

operations should be verified at agreed

maintenance intervals in addition to

compliance with § 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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