Airworthiness Directives; Pratt & Whitney Canada Corp. (P&WC) PW305A and PW305B Turboprop Engines, 72653-72655 [2010-29599]

Download as PDF 72653 Rules and Regulations Federal Register Vol. 75, No. 227 Friday, November 26, 2010 This section of the FEDERAL REGISTER contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510. published on February 3, 2010 (75 FR 5495), and March 8, 2010 (75 FR 10410). This document further corrects a typographical error that appears in the correction document published in the Federal Register on February 3, 2010. The Code of Federal Regulations is sold by the Superintendent of Documents. Prices of new books are listed in the first FEDERAL REGISTER issue of each week. List of Subjects in 10 CFR Part 50 10 CFR Part 50 Antitrust, Classified information, Criminal penalties, Fire protection, Intergovernmental relations, Nuclear power plants and reactors, Radiation protection, Reactor siting criteria, Reporting and recordkeeping requirements. [NRC–2007–0008] § 50.61a [Amended] 2. In § 50.61a, amend paragraph (g), Equation 7, by removing the text ‘‘A = 1.451 × 10¥7 for plates’’ and adding in its place the text ‘‘A = 1.561 × 10¥7 for plates’’. ■ Dated at Rockville, Maryland, November 19, 2010. For the Nuclear Regulatory Commission. Cindy Bladey, Chief, Rules, Announcements, and Directives Branch, Division of Administrative Services, Office of Administration. ■ NUCLEAR REGULATORY COMMISSION [FR Doc. 2010–29757 Filed 11–24–10; 8:45 am] BILLING CODE 7590–01–P Alternate Fracture Toughness Requirements for Protection Against Pressurized Thermal Shock Events; Correction For the reasons set out in the preamble and under the authority of the Atomic Energy Act of 1954, as amended; the Energy Reorganization Act of 1974, as amended; and 5 U.S.C. 552 and 553, the NRC is adopting the following amendments to 10 CFR part 50. AGENCY: Nuclear Regulatory Commission. ACTION: Correcting amendment. PART 50—DOMESTIC LICENSING OF PRODUCTION AND UTILIZATION FACILITIES [Docket No. FAA–2010–0892; Directorate Identifier 2010–NE–23–AD; Amendment 39– 16524; AD 2010–24–05] On January 3, 2010, the Nuclear Regulatory Commission (NRC or Commission) published in the Federal Register a final rule (75 FR 13) that amends the NRC’s regulations in Title 10 of the Code of Federal Regulations (10 CFR) part 50, section 61a to provide alternate fracture toughness requirements for protection against pressurized thermal shock (PTS) events for pressurized water reactor (PWR) pressure vessels. On February 3, 2010, the NRC published in the Federal Register a correction to the final rule (75 FR 5495) to correct formatting and typographical errors. This document is necessary to further correct a typographical error that appears in the correction document. DATES: The correction is effective on November 26, 2010, and is applicable beginning February 3, 2010, the date the original rule became effective. FOR FURTHER INFORMATION CONTACT: Cindy Bladey, Chief, Rules, Announcements, and Directives Branch, Office of Administration, Nuclear Regulatory Commission, Washington, DC 20555–0001, telephone: 301–492– 3667, e-mail: Cindy.Bladey@nrc.gov. SUPPLEMENTARY INFORMATION: This document is the third set of corrections to the final rule published on January 3, 2010. Previous corrections were ■ 1. The authority citation for Part 50 continues to read as follows: RIN 2120–AA64 RIN 3150–AI01 srobinson on DSKHWCL6B1PROD with RULES SUMMARY: VerDate Mar<15>2010 16:10 Nov 24, 2010 Jkt 223001 Authority: Secs. 102, 103, 104, 105, 161, 182, 183, 186, 189, 68 Stat. 936, 937, 938, 948, 953, 954, 955, 956, as amended, sec. 234, 83 Stat. 444, as amended (42 U.S.C. 2132, 2133, 2134, 2135, 2201, 2232, 2233, 2236, 2239, 2282); secs. 201, as amended, 202, 206, 88 Stat. 1242, as amended, 1244, 1246 (42 U.S.C. 5841, 5842, 5846); sec. 1704, 112 Stat. 2750 (44 U.S.C. 3504 note); Energy Policy Act of 2005, Pub. L. 109–58, 119 Stat. 194 (2005). Section 50.7 also issued under Pub. L. 95–601, sec. 10, 92 Stat. 2951 as amended by Pub. L. 102–486, sec. 2902, 106 Stat. 3123 (42 U.S.C. 5841). Section 50.10 also issued under secs. 101, 185, 68 Stat. 955, as amended (42 U.S.C. 2131, 2235); sec. 102, Pub. L. 91–190, 83 Stat. 853 (42 U.S.C. 4332). Sections 50.13, 50.54(dd), and 50.103 also issued under sec. 108, 68 Stat. 939, as amended (42 U.S.C. 2138). Sections 50.23, 50.35, 50.55, and 50.56 also issued under sec. 185, 68 Stat. 955 (42 U.S.C. 2235). Sections 50.33a, 50.55a and Appendix Q also issued under sec. 102, Pub. L. 91–190, 83 Stat. 853 (42 U.S.C. 4332). Sections 50.34 and 50.54 also issued under sec. 204, 88 Stat. 1245 (42 U.S.C. 5844). Sections 50.58, 50.91, and 50.92 also issued under Pub. L. 97–415, 96 Stat. 2073 (42 U.S.C. 2239). Section 50.78 also issued under sec. 122, 68 Stat. 939 (42 U.S.C. 2152). Sections 50.80–50.81 also issued under sec. 184, 68 Stat. 954, as amended (42 U.S.C. 2234). Appendix F also issued under sec. 187, 68 Stat. 955 (42 U.S.C. 2237). PO 00000 Frm 00001 Fmt 4700 Sfmt 4700 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 Airworthiness Directives; Pratt & Whitney Canada Corp. (P&WC) PW305A and PW305B Turboprop Engines Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: SUMMARY: As a result of a change in the low-cycle fatigue lifing methodology for the IMI 834 material, the recommended service life of certain PW305A and PW305B Impellers has been reduced, as published in the Airworthiness Limitations (AWL) section of Engine Maintenance Manual (EMM). The in-service life of impellers P/N 30B2185, 30B2486 and 30B2858–01 has been reduced from 12,000 to 7,000 cycles; and of P/N 30B4565–01 from 8,500 to 7,000 cycles. We are issuing this AD to prevent failure of the impeller, which could result in an uncontained event and possible damage to the airplane. E:\FR\FM\26NOR1.SGM 26NOR1 72654 Federal Register / Vol. 75, No. 227 / Friday, November 26, 2010 / Rules and Regulations This AD becomes effective January 3, 2011. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of January 3, 2011. ADDRESSES: The Docket Operations office is located at Docket Management Facility, U.S. Department of Transportation, 1200 New Jersey Avenue, SE., West Building Ground Floor, Room W12–140, Washington, DC 20590–0001. FOR FURTHER INFORMATION CONTACT: James Lawrence, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: james.lawrence@faa.gov; phone: (781) 238–7176; fax: (781) 238–7199. SUPPLEMENTARY INFORMATION: DATES: Discussion We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM was published in the Federal Register on August 19, 2010 (75 FR 51187). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI states: As a result of a change in the low-cycle fatigue lifing methodology for the IMI 834 material, the recommended service life of certain PW305A and PW305B Impellers has been reduced, as published in the Airworthiness Limitations (AWL) section of Engine Maintenance Manual (EMM). The in-service life of impellers P/N 30B2185, 30B2486 and 30B2858–01 has been reduced from 12,000 to 7,000 cycles; and of P/N 30B4565–01 from 8,500 to 7,000 cycles. This Airworthiness Directive (AD) is issued to mandate the incorporation of the revised in-service life limits for the affected impellers, in the AWL section of EMM, as introduced by Temporary Revision (TR) AL–8. Within 30 days from the effective date of this AD, update AWL section of your PW305 EMM P/N 30B1402, to incorporate TR AL–8 for compliance with the revised in-service limits for the affected Impellers, installed on PW305A and PW305B engine. Comments srobinson on DSKHWCL6B1PROD with RULES We gave the public the opportunity to participate in developing this AD. We considered the comment received. Request To Establish an Ending Engine Serial Number Applicability One commenter, Bombardier—Learjet, asked us to establish an ending engine serial number (S/N) applicability for the proposed AD. The commenter said that any engine from S/N CA0651 forward will be linked to the updated engine maintenance manual (EMM) with the VerDate Mar<15>2010 16:10 Nov 24, 2010 Jkt 223001 7,000 cycle exducer life limit. Therefore, engines that have entered or will enter service with the appropriate Airworthiness Limitations already included in their EMM, will not be subject to this unsafe condition. To leave the AD applicability open-ended, will cause hours of unnecessary review and logbook entries for original equipment manufacturers (OEMs) and operators of engines that do not have an unsafe condition. We don’t agree. Because there are no mandatory links between the engine S/N and the EMM, there is no guarantee the EMM will stay with a particular engine S/N. Also, because the proposed AD is a onetime requirement to reduce the life limit for the exducer in the Airworthiness Limitations Section, the proposed AD won’t cause hours of unnecessary review and logbook entries for OEMs and operators of engines. We didn’t change the proposed AD. Conclusion We reviewed the available data, including the comment received, and determined that air safety and the public interest require adopting the AD as proposed. Costs of Compliance Based on the service information, we estimate that this AD will affect about 114 products of U.S. registry. We also estimate that it will take 0 work-hours per product to comply with this AD. The average labor rate is $85 per workhour. Required parts will cost about $54,288 per product. Based on these figures, we estimate the cost of the AD on U.S. operators to be $6,188,832. Our cost estimate is exclusive of possible warranty coverage. Authority for This Rulemaking Title 49 of the United States Code specifies the FAA’s authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. ‘‘Subtitle VII: Aviation Programs,’’ describes in more detail the scope of the Agency’s authority. We are issuing this rulemaking under the authority described in ‘‘Subtitle VII, Part A, Subpart III, Section 44701: General requirements.’’ Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on PO 00000 Frm 00002 Fmt 4700 Sfmt 4700 products identified in this rulemaking action. Regulatory Findings We determined that this AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify this AD: 1. Is not a ‘‘significant regulatory action’’ under Executive Order 12866; 2. Is not a ‘‘significant rule’’ under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. We prepared a regulatory evaluation of the estimated costs to comply with this AD and placed it in the AD docket. Examining the AD Docket You may examine the AD docket on the Internet at http:// www.regulations.gov; or in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Operations office (phone (800) 647–5527) is provided in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: ■ PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new AD: ■ 2010–24–05 Pratt & Whitney Canada Corp. (Formerly Pratt & Whitney Canada, Inc.): Amendment 39–16524. Docket No. E:\FR\FM\26NOR1.SGM 26NOR1 Federal Register / Vol. 75, No. 227 / Friday, November 26, 2010 / Rules and Regulations FAA–2010–0829; Directorate Identifier 2010–NE–23–AD. Effective Date (a) This airworthiness directive (AD) becomes effective January 3, 2011. Affected ADs (b) None. Applicability (c) This AD applies to Pratt & Whitney Canada Corp. (P&WC) PW305A and PW305B turboprop engines with certain impellers, part numbers (P/Ns) 30B2185, 30B2486, 30B2858–01, or 30B4565–01 installed. These engines are installed on, but not limited to, Hawker-Beech Corporation BAe.125 series 1000A, 1000B, and Hawker 1000 airplanes and Learjet Inc. Learjet 60 airplanes. Reason (d) This AD results from: As a result of a change in the low-cycle fatigue lifing methodology for the IMI 834 material, the recommended service life of certain PW305A and PW305B Impellers has been reduced, as published in the Airworthiness Limitations (AWL) section of Engine Maintenance Manual (EMM). The in-service life of impellers P/N 30B2185, 30B2486 and 30B2858–01 has been reduced from 12,000 to 7,000 cycles; and of P/N 30B4565–01 from 8,500 to 7,000 cycles. We are issuing this AD to prevent failure of the impeller, which could result in an uncontained event and possible damage to the airplane. Actions and Compliance (e) Unless already done, do the following actions. (f) Within 30 days from the effective date of this AD, update AWL section of your PW305 EMM P/N 30B1402, to incorporate Pratt & Whitney Canada Corp. Temporary Revision (TR) AL–8, dated January 20, 2010, for compliance with the revised in-service limits for the affected Impellers, installed on PW305A and PW305B engine. (g) None. Other FAA AD Provisions (h) The following provisions also apply to this AD: Alternative Methods of Compliance (AMOCs) Related Information srobinson on DSKHWCL6B1PROD with RULES [FR Doc. 2010–29599 Filed 11–24–10; 8:45 am] (j) Refer to MCAI Transport Canada Airworthiness Directive CF–2010–09, dated March 17, 2010, for related information. (k) Contact James Lawrence, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: james.lawrence@faa.gov; phone: (781) 238–7176; fax: (781) 238–7199, for more information about this AD. Jkt 223001 FKNMS, and will help protect the Florida Keys ecosystem from potentially harmful vessel sewage discharges. An environmental assessment has been prepared for this action pursuant to the National Environmental Policy Act. The environmental assessment includes a Finding of No Significant Impact (FONSI) regarding the impacts of this rulemaking. DATES: These regulations are effective on December 27, 2010. ADDRESSES: A copy of the environmental assessment, which includes the FONSI, described in this rule is available upon request to Sean Morton, Sanctuary Superintendent, Florida Keys National Marine Sanctuary, 33 East Quay Road, Key West, Florida 33040. It is also available for viewing and download at http:// floridakeys.noaa.gov/. FOR FURTHER INFORMATION CONTACT: Sean Morton, Sanctuary Superintendent, Florida Keys National Marine Sanctuary, 33 East Quay Road, Key West, Florida 33040. Phone: 305– 809–4700. SUPPLEMENTARY INFORMATION: BILLING CODE 4910–13–P DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration 15 CFR Part 922 [Docket No. 090122044–0403–02] RIN 0648–AX58 Marine Sanitation Device Discharge Regulations for the Florida Keys National Marine Sanctuary Office of National Marine Sanctuaries (ONMS), National Oceanic and Atmospheric Administration (NOAA), Department of Commerce (DOC). ACTION: Final rule. NOAA is amending the regulations for the Florida Keys National Marine Sanctuary (FKNMS or sanctuary) by eliminating the exemption that allows discharges from within the boundary of the sanctuary of biodegradable effluent incidental to vessel use and generated by marine sanitation devices (MSDs) approved under the Clean Water Act (CWA), and by requiring that MSDs be secured to prevent discharges of treated and untreated sewage. This action builds upon the Environmental Protection Agency’s creation of a No Discharge Zone (NDZ) for the state waters of the SUMMARY: (i) The Manager, Engine Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. 16:10 Nov 24, 2010 Issued in Burlington, Massachusetts, on November 10, 2010. Peter A. White, Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. AGENCY: FAA AD Differences VerDate Mar<15>2010 Material Incorporated by Reference (l) You must use Pratt & Whitney Canada Corp. Temporary Revision No. AL–8, dated January 20, 2010, to P&WC EMM P/N 30B1402 to do the actions required by this AD, unless the AD specifies otherwise. (1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact Pratt & Whitney Canada Corp., 1000 Marie-Victorin, Longueuil, Quebec, Canada J4G 1A1; telephone (800) 268–8000; fax (450) 647–2888; or go to: http://www.pwc.ca. (3) You may review copies at the FAA, New England Region, 12 New England Executive Park, Burlington, MA; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741–6030, or go to: http:// www.archives.gov/federal-register/cfr/ibrlocations.html. 72655 PO 00000 Frm 00003 Fmt 4700 Sfmt 4700 Electronic Access This Federal Register document is also accessible via the Internet at http://www.gpoaccess.gov/fr/ index.html. I. Statutory and Regulatory Background The National Marine Sanctuaries Act (NMSA) (16 U.S.C. 1431 et seq.) authorizes the Secretary of Commerce to designate and protect as national marine sanctuaries areas of the marine environment with special national significance due to their conservation, recreational, ecological, historical, scientific, cultural, archeological, educational, or esthetic qualities. Management of national marine sanctuaries has been delegated by the Secretary of Commerce to NOAA’s Office of National Marine Sanctuaries. The primary objective of the NMSA is to protect marine resources, such as coral reefs, sunken historical vessels, or unique habitats. The FKNMS was designated by Congress in 1990 through the Florida Keys National Marine Sanctuary Protection Act (FKNMSPA, Pub. L. 101– 605) and extends approximately 220 nautical miles southwest from the southern tip of the Florida peninsula. The sanctuary’s marine ecosystem supports over 6,000 species of plants, fishes and invertebrates, including the Nation’s only living coral reef that lies adjacent to the continent. The area includes one of the largest seagrass E:\FR\FM\26NOR1.SGM 26NOR1

Agencies

[Federal Register Volume 75, Number 227 (Friday, November 26, 2010)]
[Rules and Regulations]
[Pages 72653-72655]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-29599]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-0892; Directorate Identifier 2010-NE-23-AD; 
Amendment 39-16524; AD 2010-24-05]
RIN 2120-AA64


Airworthiness Directives; Pratt & Whitney Canada Corp. (P&WC) 
PW305A and PW305B Turboprop Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: We are adopting a new airworthiness directive (AD) for the 
products listed above. This AD results from mandatory continuing 
airworthiness information (MCAI) issued by an aviation authority of 
another country to identify and correct an unsafe condition on an 
aviation product. The MCAI describes the unsafe condition as:

    As a result of a change in the low-cycle fatigue lifing 
methodology for the IMI 834 material, the recommended service life 
of certain PW305A and PW305B Impellers has been reduced, as 
published in the Airworthiness Limitations (AWL) section of Engine 
Maintenance Manual (EMM).
    The in-service life of impellers P/N 30B2185, 30B2486 and 
30B2858-01 has been reduced from 12,000 to 7,000 cycles; and of P/N 
30B4565-01 from 8,500 to 7,000 cycles.

    We are issuing this AD to prevent failure of the impeller, which 
could result in an uncontained event and possible damage to the 
airplane.

[[Page 72654]]


DATES: This AD becomes effective January 3, 2011. The Director of the 
Federal Register approved the incorporation by reference of certain 
publications listed in this AD as of January 3, 2011.

ADDRESSES: The Docket Operations office is located at Docket Management 
Facility, U.S. Department of Transportation, 1200 New Jersey Avenue, 
SE., West Building Ground Floor, Room W12-140, Washington, DC 20590-
0001.

FOR FURTHER INFORMATION CONTACT: James Lawrence, Aerospace Engineer, 
Engine Certification Office, FAA, Engine & Propeller Directorate, 12 
New England Executive Park, Burlington, MA 01803; e-mail: 
james.lawrence@faa.gov; phone: (781) 238-7176; fax: (781) 238-7199.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an AD that would apply to the specified products. 
That NPRM was published in the Federal Register on August 19, 2010 (75 
FR 51187). That NPRM proposed to correct an unsafe condition for the 
specified products. The MCAI states:

    As a result of a change in the low-cycle fatigue lifing 
methodology for the IMI 834 material, the recommended service life 
of certain PW305A and PW305B Impellers has been reduced, as 
published in the Airworthiness Limitations (AWL) section of Engine 
Maintenance Manual (EMM).
    The in-service life of impellers P/N 30B2185, 30B2486 and 
30B2858-01 has been reduced from 12,000 to 7,000 cycles; and of P/N 
30B4565-01 from 8,500 to 7,000 cycles.
    This Airworthiness Directive (AD) is issued to mandate the 
incorporation of the revised in-service life limits for the affected 
impellers, in the AWL section of EMM, as introduced by Temporary 
Revision (TR) AL-8.
    Within 30 days from the effective date of this AD, update AWL 
section of your PW305 EMM P/N 30B1402, to incorporate TR AL-8 for 
compliance with the revised in-service limits for the affected 
Impellers, installed on PW305A and PW305B engine.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We considered the comment received.

Request To Establish an Ending Engine Serial Number Applicability

    One commenter, Bombardier--Learjet, asked us to establish an ending 
engine serial number (S/N) applicability for the proposed AD. The 
commenter said that any engine from S/N CA0651 forward will be linked 
to the updated engine maintenance manual (EMM) with the 7,000 cycle 
exducer life limit. Therefore, engines that have entered or will enter 
service with the appropriate Airworthiness Limitations already included 
in their EMM, will not be subject to this unsafe condition. To leave 
the AD applicability open-ended, will cause hours of unnecessary review 
and logbook entries for original equipment manufacturers (OEMs) and 
operators of engines that do not have an unsafe condition.
    We don't agree. Because there are no mandatory links between the 
engine S/N and the EMM, there is no guarantee the EMM will stay with a 
particular engine S/N. Also, because the proposed AD is a onetime 
requirement to reduce the life limit for the exducer in the 
Airworthiness Limitations Section, the proposed AD won't cause hours of 
unnecessary review and logbook entries for OEMs and operators of 
engines. We didn't change the proposed AD.

Conclusion

    We reviewed the available data, including the comment received, and 
determined that air safety and the public interest require adopting the 
AD as proposed.

Costs of Compliance

    Based on the service information, we estimate that this AD will 
affect about 114 products of U.S. registry. We also estimate that it 
will take 0 work-hours per product to comply with this AD. The average 
labor rate is $85 per work-hour. Required parts will cost about $54,288 
per product. Based on these figures, we estimate the cost of the AD on 
U.S. operators to be $6,188,832. Our cost estimate is exclusive of 
possible warranty coverage.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. ``Subtitle VII: Aviation 
Programs,'' describes in more detail the scope of the Agency's 
authority.
    We are issuing this rulemaking under the authority described in 
``Subtitle VII, Part A, Subpart III, Section 44701: General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We determined that this AD will not have federalism implications 
under Executive Order 13132. This AD will not have a substantial direct 
effect on the States, on the relationship between the national 
government and the States, or on the distribution of power and 
responsibilities among the various levels of government.
    For the reasons discussed above, I certify this AD:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979); and
    3. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this AD and placed it in the AD docket.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Operations office 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains this AD, the regulatory evaluation, 
any comments received, and other information. The street address for 
the Docket Operations office (phone (800) 647-5527) is provided in the 
ADDRESSES section. Comments will be available in the AD docket shortly 
after receipt.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

0
Accordingly, under the authority delegated to me by the Administrator, 
the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

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


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new AD:

2010-24-05 Pratt & Whitney Canada Corp. (Formerly Pratt & Whitney 
Canada, Inc.): Amendment 39-16524. Docket No.

[[Page 72655]]

FAA-2010-0829; Directorate Identifier 2010-NE-23-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective January 
3, 2011.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Pratt & Whitney Canada Corp. (P&WC) 
PW305A and PW305B turboprop engines with certain impellers, part 
numbers (P/Ns) 30B2185, 30B2486, 30B2858-01, or 30B4565-01 
installed. These engines are installed on, but not limited to, 
Hawker-Beech Corporation BAe.125 series 1000A, 1000B, and Hawker 
1000 airplanes and Learjet Inc. Learjet 60 airplanes.

Reason

    (d) This AD results from:
    As a result of a change in the low-cycle fatigue lifing 
methodology for the IMI 834 material, the recommended service life 
of certain PW305A and PW305B Impellers has been reduced, as 
published in the Airworthiness Limitations (AWL) section of Engine 
Maintenance Manual (EMM).
    The in-service life of impellers P/N 30B2185, 30B2486 and 
30B2858-01 has been reduced from 12,000 to 7,000 cycles; and of P/N 
30B4565-01 from 8,500 to 7,000 cycles.
    We are issuing this AD to prevent failure of the impeller, which 
could result in an uncontained event and possible damage to the 
airplane.

Actions and Compliance

    (e) Unless already done, do the following actions.
    (f) Within 30 days from the effective date of this AD, update 
AWL section of your PW305 EMM P/N 30B1402, to incorporate Pratt & 
Whitney Canada Corp. Temporary Revision (TR) AL-8, dated January 20, 
2010, for compliance with the revised in-service limits for the 
affected Impellers, installed on PW305A and PW305B engine.

FAA AD Differences

    (g) None.

Other FAA AD Provisions

    (h) The following provisions also apply to this AD:

Alternative Methods of Compliance (AMOCs)

    (i) The Manager, Engine Certification Office, FAA, has the 
authority to approve AMOCs for this AD, if requested using the 
procedures found in 14 CFR 39.19.

Related Information

    (j) Refer to MCAI Transport Canada Airworthiness Directive CF-
2010-09, dated March 17, 2010, for related information.
    (k) Contact James Lawrence, Aerospace Engineer, Engine 
Certification Office, FAA, Engine & Propeller Directorate, 12 New 
England Executive Park, Burlington, MA 01803; e-mail: 
james.lawrence@faa.gov; phone: (781) 238-7176; fax: (781) 238-7199, 
for more information about this AD.

Material Incorporated by Reference

    (l) You must use Pratt & Whitney Canada Corp. Temporary Revision 
No. AL-8, dated January 20, 2010, to P&WC EMM P/N 30B1402 to do the 
actions required by this AD, unless the AD specifies otherwise.
    (1) The Director of the Federal Register approved the 
incorporation by reference of this service information under 5 
U.S.C. 552(a) and 1 CFR part 51.
    (2) For service information identified in this AD, contact Pratt 
& Whitney Canada Corp., 1000 Marie-Victorin, Longueuil, Quebec, 
Canada J4G 1A1; telephone (800) 268-8000; fax (450) 647-2888; or go 
to: http://www.pwc.ca.
    (3) You may review copies at the FAA, New England Region, 12 New 
England Executive Park, Burlington, MA; or at the National Archives 
and Records Administration (NARA). For information on the 
availability of this material at NARA, call (202) 741-6030, or go 
to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Burlington, Massachusetts, on November 10, 2010.
Peter A. White,
Assistant Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 2010-29599 Filed 11-24-10; 8:45 am]
BILLING CODE 4910-13-P