Calculation of Noise Levels Published in Advisory Circular 36-3, 27076 [E9-13333]

Download as PDF 27076 Federal Register / Vol. 74, No. 108 / Monday, June 8, 2009 / Rules and Regulations the regulated article must be sufficiently described on the certificate or limited permit and on the waybill to identify the regulated article. (b) The certificate or limited permit for the interstate movement of a regulated article must be furnished by the carrier or the carrier’s representative to the consignee listed on the certificate or limited permit upon arrival at the location provided on the certificate or limited permit. Background DEPARTMENT OF TRANSPORTATION Paragraph 3 of AC 36–3 states that ‘‘14 CFR part 36 requires the reporting of turbojet and large transport category aircraft certificated noise levels in units of Effective Perceived Noise Level in decibels (EPNdB). Many airport and other community noise analyses utilize a noise rating scale that is based upon A-weighted decibels. For this reason, Aweighted noise levels for aircraft under 14 CFR part 36 conditions have been estimated to provide a reference source for aircraft noise levels that is consistent with the many noise rating scales having A-weighted noise level as the basic measure.’’ The noise levels published in AC 36–3 for turbojet and large transport category airplanes are usually submitted to the FAA by the airplane type certificate (or supplemental type certificate) holder. The entity submitting the noise levels for publication is responsible for deriving the A-weighted level from the EPNdB levels submitted for certification. Recently, we received an inquiry requesting a clarification of those reference procedures, data analysis procedures, and data corrections that are to be used in deriving A-weighted noise levels for publication in AC 36– 3. The question and our policy stated in this document apply only to noise levels for turbojet and large transport category airplanes. Federal Aviation Administration Policy Statement (Approved by the Office of Management and Budget under control number 0579–0337) § 301.55–9 Costs and charges. The services of the inspector during normal business hours (8 a.m. to 4:30 p.m., Monday through Friday, except holidays) will be furnished without cost. APHIS will not be responsible for all costs or charges incident to inspections or compliance with the provisions of the quarantine and regulations in this subpart, other than for the services of the inspector. Done in Washington, DC, this 2nd day of June 2009. Kevin Shea, Acting Administrator, Animal and Plant Health Inspection Service. [FR Doc. E9–13317 Filed 6–5–09; 8:45 am] BILLING CODE 3410–34–P 14 CFR Part 36 Calculation of Noise Levels Published in Advisory Circular 36–3 AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Statement of policy. cprice-sewell on PRODPC61 with RULES SUMMARY: This action clarifies the Federal Aviation Administration’s (FAA) policy on the calculation of derived noise levels submitted for publication in Advisory Circular (AC) 36–3, Estimated Airplane Noise Levels in A–Weighted Decibels. This action is intended to provide guidance on calculating the derived levels used in that publication. FOR FURTHER INFORMATION CONTACT: Mr. James Skalecky, Office of Environment and Energy (AEE–100), Federal Aviation Administration, 800 Independence Avenue, SW., Washington, DC 20591; telephone (202) 267–3699; facsimile (202) 267–5594; e-mail James.Skalecky@faa.gov. VerDate Nov<24>2008 14:52 Jun 05, 2009 Jkt 217001 In order to ensure that all airplane noise levels submitted for publication in AC 36–3 are derived in a consistent manner, it is the FAA’s policy that the noise levels be derived using the same reference procedures, data analysis procedures, and data corrections/ adjustments that were used in deriving the 14 CFR part 36 certificated noise levels. The only exceptions are for deviations necessitated by (1) differences between the effective perceived noise level and A-weighted sound level metrics, or (2) inclusion of approach noise levels corresponding to use of less than the maximum flap setting, as permitted under AC 36–3, paragraph 4.a. In the case of number 2, the deviation is limited to the use of an approach configuration other than the noise-critical configuration that is required for the noise certification approach reference procedure by part 36, Appendix B, paragraph B36.7(c)(5). Such deviations must be identified to the FAA when the data are submitted for inclusion in the AC. No other deviations will be accepted. PO 00000 Frm 00006 Fmt 4700 Sfmt 4700 When an airplane model that is already listed in AC 36–3 is recertificated from 14 CFR part 36 Stage 3 to Stage 4, the noise levels corresponding to the Stage 3 configuration are not automatically replaced. The Stage 3 noise levels will remain in AC 36–3, unless noise levels corresponding to the Stage 4 configuration are submitted for publication. If Stage 4 noise levels are submitted, the FAA will remove the Stage 3 noise levels from AC 36–3 for that model and replace them with the Stage 4 noise levels when the AC is updated. Noise levels submitted for Stage 4 configurations must conform to this policy for deriving noise levels submitted for publication in AC 36–3. Issued in Washington, DC, on June 2, 2009. Lourdes Q. Maurice, Acting Director of Environment and Energy. [FR Doc. E9–13333 Filed 6–5–09; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 71 [Docket No. FAA–2009–1236; Airspace Docket No. 08–AGL–16] Amendment of Class E Airspace; Waverly, OH AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: This action amends Class E airspace at Waverly, OH. Additional controlled airspace is necessary to accommodate Area Navigation (RNAV) Standard Instrument Approach Procedures (SIAP) at Pike County Airport, Waverly, OH. The FAA is taking this action to enhance the safety and management of Instrument Flight Rule (IFR) operations at Pike County Airport. DATES: Effective Date: 0901 UTC, August 27, 2009. The Director of the Federal Register approves this incorporation by reference action under 1 CFR Part 51, subject to the annual revision of FAA Order 7400.9 and publication of conforming amendments. FOR FURTHER INFORMATION CONTACT: Scott Enander, Central Service Center, Operations Support Group, Federal Aviation Administration, Southwest Region, 2601 Meacham Blvd., Fort Worth, TX 76193–0530; telephone (817) 321–7716. SUPPLEMENTARY INFORMATION: E:\FR\FM\08JNR1.SGM 08JNR1

Agencies

[Federal Register Volume 74, Number 108 (Monday, June 8, 2009)]
[Rules and Regulations]
[Page 27076]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E9-13333]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 36


Calculation of Noise Levels Published in Advisory Circular 36-3

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Statement of policy.

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SUMMARY: This action clarifies the Federal Aviation Administration's 
(FAA) policy on the calculation of derived noise levels submitted for 
publication in Advisory Circular (AC) 36-3, Estimated Airplane Noise 
Levels in A-Weighted Decibels. This action is intended to provide 
guidance on calculating the derived levels used in that publication.

FOR FURTHER INFORMATION CONTACT: Mr. James Skalecky, Office of 
Environment and Energy (AEE-100), Federal Aviation Administration, 800 
Independence Avenue, SW., Washington, DC 20591; telephone (202) 267-
3699; facsimile (202) 267-5594; e-mail James.Skalecky@faa.gov.

Background

    Paragraph 3 of AC 36-3 states that ``14 CFR part 36 requires the 
reporting of turbojet and large transport category aircraft 
certificated noise levels in units of Effective Perceived Noise Level 
in decibels (EPNdB). Many airport and other community noise analyses 
utilize a noise rating scale that is based upon A-weighted decibels. 
For this reason, A-weighted noise levels for aircraft under 14 CFR part 
36 conditions have been estimated to provide a reference source for 
aircraft noise levels that is consistent with the many noise rating 
scales having A-weighted noise level as the basic measure.'' The noise 
levels published in AC 36-3 for turbojet and large transport category 
airplanes are usually submitted to the FAA by the airplane type 
certificate (or supplemental type certificate) holder. The entity 
submitting the noise levels for publication is responsible for deriving 
the A-weighted level from the EPNdB levels submitted for certification.
    Recently, we received an inquiry requesting a clarification of 
those reference procedures, data analysis procedures, and data 
corrections that are to be used in deriving A-weighted noise levels for 
publication in AC 36-3. The question and our policy stated in this 
document apply only to noise levels for turbojet and large transport 
category airplanes.

Policy Statement

    In order to ensure that all airplane noise levels submitted for 
publication in AC 36-3 are derived in a consistent manner, it is the 
FAA's policy that the noise levels be derived using the same reference 
procedures, data analysis procedures, and data corrections/adjustments 
that were used in deriving the 14 CFR part 36 certificated noise 
levels. The only exceptions are for deviations necessitated by (1) 
differences between the effective perceived noise level and A-weighted 
sound level metrics, or (2) inclusion of approach noise levels 
corresponding to use of less than the maximum flap setting, as 
permitted under AC 36-3, paragraph 4.a. In the case of number 2, the 
deviation is limited to the use of an approach configuration other than 
the noise-critical configuration that is required for the noise 
certification approach reference procedure by part 36, Appendix B, 
paragraph B36.7(c)(5). Such deviations must be identified to the FAA 
when the data are submitted for inclusion in the AC. No other 
deviations will be accepted.
    When an airplane model that is already listed in AC 36-3 is 
recertificated from 14 CFR part 36 Stage 3 to Stage 4, the noise levels 
corresponding to the Stage 3 configuration are not automatically 
replaced. The Stage 3 noise levels will remain in AC 36-3, unless noise 
levels corresponding to the Stage 4 configuration are submitted for 
publication. If Stage 4 noise levels are submitted, the FAA will remove 
the Stage 3 noise levels from AC 36-3 for that model and replace them 
with the Stage 4 noise levels when the AC is updated.
    Noise levels submitted for Stage 4 configurations must conform to 
this policy for deriving noise levels submitted for publication in AC 
36-3.

    Issued in Washington, DC, on June 2, 2009.
Lourdes Q. Maurice,
Acting Director of Environment and Energy.
[FR Doc. E9-13333 Filed 6-5-09; 8:45 am]
BILLING CODE 4910-13-P
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