Federal Register / Vol. 66, No. 38 / Monday, February 26, 2001 / Rules and Regulations 11529

High-Intensity Radiated Fields (HIRF)

With the trend toward increased

power levels from ground-based

transmitters, plus the advent of space

and satellite communications coupled

with electronic command and control of

the airplane, the immunity of critical

avionics/electronics and electrical

systems to HIRF must be established.

It is not possible to precisely define

the HIRF to which the airplane will be

exposed in service. There is also

uncertainty concerning the effectiveness

of airframe shielding for HIRF.

Furthermore, coupling of

electromagnetic energy to cockpitinstalled equipment through the cockpit

window apertures is undefined. Based

on surveys and analysis of existing HIRF

emitters, an adequate level of protection

exists when compliance with the HIRF

protection special condition is shown

with either paragraph 1 or 2 below:

1. A minimum threat of 100 volts rms

per meter electric field strength from 10

KHz to 18 GHz.

a. The threat must be applied to the

system elements and their associated

wiring harnesses without the benefit of

airframe shielding.

b. Demonstration of this level of

protection is established through system

tests and analysis.

2. A threat external to the airframe of

the following field strengths for the

frequency ranges indicated. Both peak

and average field strength components

from the Table are to be demonstrated.

Frequency

Field strength

(volts per meter)

Peak Average

10 kHz–100 kHz 50 50

100 kHz–500

kHz ................ 50 50

500 kHz–2 MHz 50 50

2 MHz–30 MHz 100 100

30 MHz–70 MHz 50 50

70 MHz–100

MHz ............... 50 50

100 MHz–200

MHz ............... 100 100

200 MHz–400

MHz ............... 100 100

400 MHz–700

MHz ............... 700 50

700 MHz–1 GHz 700 100

1 GHz–2 GHz ... 2000 200

2 GHz–4 GHz ... 3000 200

4 GHz–6 GHz ... 3000 200

6 GHz–8 GHz ... 1000 200

8 GHz–12 GHz 3000 300

12 GHz–18 GHz 2000 200

18 GHz–40 GHz 600 200

The field strengths are expressed in terms of

peak of the root-mean-square (rms) over the

complete modulation period.

The threat levels identified above are

the result of an FAA review of existing

studies on the subject of HIRF, in light

of the ongoing work of the

Electromagnetic Effects Harmonization

Working Group of the Aviation

Rulemaking Advisory Committee.

Applicability

As discussed above, these special

conditions are applicable to Airbus

Industrie A300 airplanes modified to

Electronic Cable Specialists design.

Should Electronic Cable Specialists

apply at a later date for a supplemental

type certificate to modify any other

model included on the same type

certificate to incorporate the same novel

or unusual design feature, these special

conditions would apply to that model as

well under the provisions of

§ 21.101(a)(1).

Conclusion

This action affects only certain novel

or unusual design features on the Airbus

Industrie A300 airplanes modified to

Electronic Cable Specialists design. It is

not a rule of general applicability and

affects only the applicant who applied

to the FAA for approval of these features

on the airplane.

The substance of these special

conditions has been subjected to the

notice and comment period in several

prior instances and has been derived

without substantive change from those

previously issued. It is unlikely that

prior public comment would result in a

significant change from the substance

contained herein. For this reason, and

because a delay would significantly

affect the certification of the airplane,

which is imminent, the FAA has

determined that prior public notice and

comment are unnecessary and

impracticable, and good cause exists for

adopting these special conditions upon

issuance. The FAA is requesting

comments to allow interested persons to

submit views that may not have been

submitted in response to the prior

opportunities for comment described

above.

List of Subjects in 14 CFR Part 25

Aircraft, Aviation safety, Reporting

and recordkeeping requirements.

The authority citation for these

special conditions is as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701,

44702, 44704.

The Special Conditions

Accordingly, pursuant to the

authority delegated to me by the

Administrator, the following special

conditions are issued as part of the

supplemental type certification basis for

Airbus Industrie A300 airplanes

modified to Electronic Cable Specialists

design.

1. Protection from Unwanted Effects

of High-Intensity Radiated Fields

(HIRF). Each electrical and electronic

system that performs critical functions

must be designed and installed to

ensure that the operation and

operational capability of these systems

to perform critical functions are not

adversely affected when the airplane is

exposed to high-intensity radiated

fields.

2. For the purpose of these special

conditions, the following definition

applies: Critical Functions: Functions

whose failure would contribute to or

cause a failure condition that would

prevent the continued safe flight and

landing of the airplane.

Issued in Renton, Washington, on February

16, 2001.

Donald L. Riggin,

Acting Manager, Transport Airplane

Directorate, Aircraft Certification Service.

[FR Doc. 01–4676 Filed 2–23–01; 8:45 am]

BILLING CODE 4910–13–M

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 71

[Airspace Docket No. 00–AWP–6]

Establishment of Class D Airspace;

Sacramento Mather Airport, CA

AGENCY: Federal Aviation

Administration (FAA), DOT.

ACTION: Final rule.

SUMMARY: This action establishes Class

D airspace extending upward from the

surface to and including 2,600 feet MSL

within a 4.5-mile radius of Sacramento

Mather Airport in Sacramento, CA. A

review of airspace and procedures has

made this action necessary. Last year a

Federal Contract Tower commenced

operations at this location on a full-time

basis, serving a large volume of air cargo

and general aviation traffic. The

intended effect of this action is to

establish Class D airspace consistent

with the nature of operations at

Sacramento Mather Airport.

EFFECTIVE DATE: May 17, 2001.

FOR FURTHER INFORMATION CONTACT: Jeri

Carson, Airspace Specialist, AWP–

520.11, Air Traffic Division, WesternPacific Region, Federal Aviation

Administration, 15000 Aviation

Boulevard, Lawndale, California 90261,

telephone (310) 725–6611.

11530 Federal Register / Vol. 66, No. 38 / Monday, February 26, 2001 / Rules and Regulations

SUPPLEMENTARY INFORMATION:

Background

On November 28, 2000, the FAA

published a document (65 FR 70823)

proposing to establish Class D airspace

at Sacramento Mather Airport, CA.

Interested parties were invited to

participate in this rulemaking effort by

submitting comments on the proposal to

the FAA. In the ensuing comment

period, which closed on January 12,

2001, the FAA received no comments

on the proposed action.

The Rule

This action amends 14 CFR part 71 by

establishing Class D airspace extending

upward from the surface to and

including 2,600 feet MSL within a 4.5-

mile radius of Sacramento Mather

Airport in Sacramento, CA.

The FAA has determined that this

regulation only involves an established

body of technical regulations for which

frequent and routine amendments are

necessary to keep them operationally

current. Therefore, this regulation—(1)

is not a ‘‘significant regulatory action’’

under Executive Order 12866; (2) is not

a ‘‘significant rule’’ under DOT

Regulatory Policies and Procedures (44

FR 11034; February 26, 1979); and (3)

does not warrant preparation of a

Regulatory Evaluation as the anticipated

impact is so minimal. Since this is a

routine matter that will only affect air

traffic procedures and air navigation, it

is certified that this rule will not have

a significant economic impact on a

substantial number of small entities

under the criteria of the Regulatory

Flexibility Act.

Class D airspace areas are published

in Paragraph 5000 of FAA Order

7400.9H, Airspace Designations and

Reporting Points, dated September 1,

2000, and effective September 16, 2000,

through September 15, 2001, which is

incorporated by reference in 14 CFR

71.1. The Class D airspace designation

listed in this document will be

published subsequently in that Order.

List of Subjects in 14 CFR Part 71

Airspace, Incorporation by reference,

Navigation (air).

Adoption of the Amendment

In consideration of the foregoing, the

Federal Aviation Administration

amends part 71 of Title 14, Code of

Federal Regulations as follows:

PART 71—DESIGNATION OF CLASS A,

CLASS B, CLASS C, CLASS D AND

CLASS E AIRSPACE AREAS;

AIRWAYS; ROUTES; AND REPORTING

POINTS

1. The authority citation for 14 CFR

part 71 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40103, 40113,

40120; E.O. 10854, 24 FR 9565, 3 CFR, 1959–

1963 Comp., p. 389.

§ 71.1 [Amended]

2. The incorporation by reference in

14 CFR 71.1 of the Federal Aviation

Administration Order 7400.9H,

Airspace Designations and Reporting

Points, dated September 1, 2000, and

effective September 16, 2000, is

amended as follows:

Paragraph 5000 Class D Airspace

* * * * *

AWP CA D Sacramento Mather Airport, CA

[New]

Sacramento Mather Airport, CA

(Lat. 38°33′14′′, long. 121°17′51′′W)

That airspace extending upward from the

surface to and including 2,600 feet MSL

within a 4.5-mile radius of Sacramento

Mather Airport.

* * * * *

Issued in Los Angeles, California, on

February 12, 2001.

John Clancy,

Manager, Air Traffic Division, Western-Pacific

Region.

[FR Doc. 01–4678 Filed 2–23–01; 8:45 am]

BILLING CODE 4910–13–M

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 71

[Airspace Docket No. 00–AWP–15]

Modification of Class D and E Surface

Areas; Sacramento Executive Airport,

CA

AGENCY: Federal Aviation

Administration (FAA), DOT.

ACTION: Final rule.

SUMMARY: This action modifies the Class

D and E airspace areas at Sacramento

Executive Airport by reducing the

radius of the basic surface area and by

removing those portions of airspace

defined as a northeast extension to the

basic surface area. A review of airspace

and procedures has made this action

necessary. The intended effect of this

action is to reduce the volume of

regulatory airspace at Sacramento

Executive Airport to only that necessary

for safe and efficient operations.

EFFECTIVE DATE: May 17, 2001.

FOR FURTHER INFORMATION CONTACT: Jeri

Carson, Airspace Specialist, AWP–

520.11, Air Traffic Division, WesternPacific Region, Federal Aviation

Administration, 15000 Aviation

Boulevard, Lawndale, California 90261,

telephone (310) 725–6611.

SUPPLEMENTARY INFORMATION:

Background

On November 28, 2000, the FAA

published a document (65 FR 70824)

proposing to revise the Class D and E

airspace areas at Sacramento Executive

Airport in Sacramento, California.

Interested parties were invited to

participate in this rulemaking effort by

submitting comments on the proposal to

the FAA. In the ensuing comment

period, which closed on January 12,

2001, the FAA received no comments

on the proposed action.

The Rule

This action amends 14 CFR part 71 by

reducing the radius of the basic surface

area at Sacramento Executive Airport

and by removing those portions of

airspace defined as a northeast

extension to the basic surface area. The

FAA has determined that this regulation

only involves an established body of

technical regulations for which frequent

and routine amendments are necessary

to keep them operationally current.

Therefore, this regulation— (1) is not a

‘‘significant regulatory action’’ under

Executive Order 12866; (2) is not a

‘‘significant rule’’ under DOT

Regulatory Policies and Procedures (44

Fr 11034; February 26, 1979); and (3)

does not warrant preparation of a

Regulatory Evaluation as the anticipated

impact is so minimal. Since this is a

routine matter that will only affect air

traffic procedures and air navigation, it

is certified that this rule will not have

a significant economic impact on a

substantial number of small entities

under the criteria of the Regulatory

Flexibility Act.

Class D and E2 airspace areas are

published in Paragraphs 5000 and 6002,

respectively, of FAA Order 7400.9H,

Airspace Designations and Reporting

Points, dated September 1, 2000, and

effective September 16, 2000, through

September 15, 2001, which is

incorporated by reference in 14 CFR

71.1. The Class D and E2 airspace

designations listed in this document

will be published subsequently in that

Order.

List of Subjects in 14 CFR Part 71

Airspace, Incorporation by reference,

Navigation (air).