Airworthiness Directives; Pratt & Whitney Division Turbofan Engines, 16620-16622 [2013-06118]

Download as PDF pmangrum on DSK3VPTVN1PROD with PROPOSALS 16620 Federal Register / Vol. 78, No. 52 / Monday, March 18, 2013 / Proposed Rules II. Procedural Background This rule is limited to the changes contained in Amendment No. 3 to CoC No. 1031 and does not include other aspects of the MAGNASTOR® Cask System design. Because the NRC considers this action noncontroversial and routine, the NRC is publishing this proposed rule concurrently with a direct final rule in the Rules and Regulations section of this issue of the Federal Register. Adequate protection of public health and safety continues to be ensured. The direct final rule will become effective on June 3, 2013. However, if the NRC receives significant adverse comments on this proposed rule by April 17, 2013, then the NRC will publish a document that withdraws the direct final rule. If the direct final rule is withdrawn, the NRC will address the comments received in response to these proposed revisions in a subsequent final rule. Absent significant modifications to the proposed revisions requiring republication, the NRC will not initiate a second comment period on this action in the event the direct final rule is withdrawn. A significant adverse comment is a comment where the commenter explains why the rule would be inappropriate, including challenges to the rule’s underlying premise or approach, or would be ineffective or unacceptable without a change. A comment is adverse and significant if: (1) The comment opposes the rule and provides a reason sufficient to require a substantive response in a notice-andcomment process. For example, a substantive response is required when: (a) The comment causes the NRC staff to reevaluate (or reconsider) its position or conduct additional analysis; (b) The comment raises an issue serious enough to warrant a substantive response to clarify or complete the record; or (c) The comment raises a relevant issue that was not previously addressed or considered by the NRC staff. (2) The comment proposes a change or an addition to the rule, and it is apparent that the rule would be ineffective or unacceptable without incorporation of the change or addition. (3) The comment causes the NRC staff to make a change (other than editorial) to the rule, CoC, or TS. For additional procedural information and the regulatory analysis, see the direct final rule published in the Rules and Regulations section of this issue of the Federal Register. List of Subjects in 10 CFR Part 72 Administrative practice and procedure, Criminal penalties, VerDate Mar<14>2013 14:09 Mar 15, 2013 Jkt 229001 Manpower training programs, Nuclear materials, Occupational safety and health, Penalties, Radiation protection, Reporting and recordkeeping requirements, Security measures, Spent fuel, Whistleblowing. 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; the Nuclear Waste Policy Act of 1982, as amended; and 5 U.S.C. 553; the NRC is proposing to adopt the following amendments to 10 CFR part 72. PART 72—LICENSING REQUIREMENTS FOR THE INDEPENDENT STORAGE OF SPENT NUCLEAR FUEL, HIGH–LEVEL RADIOACTIVE WASTE AND REACTOR–RELATED GREATER THAN CLASS C WASTE 1. The authority citation for Part 72 continues to read as follows: ■ Authority: Atomic Energy Act secs. 51, 53, 57, 62, 63, 65, 69, 81, 161, 182, 183, 184, 186, 187, 189, 223, 234, 274 (42 U.S.C. 2071, 2073, 2077, 2092, 2093, 2095, 2099, 2111, 2201, 2232, 2233, 2234, 2236, 2237, 2238, 2273, 2282, 2021); Energy Reorganization Act sec. 201, 202, 206, 211 (42 U.S.C. 5841, 5842, 5846, 5851); National Environmental Policy Act sec. 102 (42 U.S.C. 4332); Nuclear Waste Policy Act secs. 131, 132, 133, 135, 137, 141 148 (42 U.S.C. 10151, 10152, 10153, 10155, 10157, 10161, 10168); sec. 1704, 112 Stat. 2750 (44 U.S.C. 3504 note); Energy Policy Act of 2005, Pub. L. No. 109–58, 119 Stat. 549 (2005). Section 72.44(g) also issued under secs. Nuclear Waste Policy Act 142(b) and 148(c), (d) (42 U.S.C. 10162(b), 10168(c), (d)). Section 72.46 also issued under Atomic Energy Act sec. 189 (42 U.S.C. 2239); Nuclear Waste Policy Act sec. 134 (42 U.S.C. 10154). Section 72.96(d) also issued under Nuclear Waste Policy Act sec. 145(g) (42 U.S.C. 10165(g)). Subpart J also issued under Nuclear Waste Policy Act secs. 117(a), 141(h) (42 U.S.C. 10137(a), 10161(h)). Subpart K is also issued under sec. 218(a) (42 U.S.C. 10198). 2. In § 72.214, Certificate of Compliance 1031 is revised to read as follows: ■ § 72.214 List of approved spent fuel storage casks. * * * * * Certificate Number: 1031. Initial Certificate Effective Date: February 4, 2009. Amendment Number 1 Effective Date: August 30, 2010. Amendment Number 2 Effective Date: January 30, 2012. Amendment Number 3 Effective Date: June 3, 2013. SAR Submitted by: NAC International, Inc. PO 00000 Frm 00002 Fmt 4702 Sfmt 4702 SAR Title: Final Safety Analysis Report for the MAGNASTOR® System. Docket Number: 72–1031. Certificate Expiration Date: February 4, 2024. Model Number: MAGNASTOR®. * * * * * Dated at Rockville, Maryland, this 2nd day of March 2013. For the Nuclear Regulatory Commission. R.W. Borchardt, Executive Director for Operations. [FR Doc. 2013–06016 Filed 3–15–13; 8:45 am] BILLING CODE 7590–01–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2013–0072; Directorate Identifier 2013–NE–04–AD] RIN 2120–AA64 Airworthiness Directives; Pratt & Whitney Division Turbofan Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to adopt a new airworthiness directive (AD) for all Pratt & Whitney Division (PW) turbofan engine models PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090–3 with a certain 2nd-stage high-pressure turbine (HPT) air seal part number (P/N) installed. This proposed AD was prompted by discovery of cracks in the 2nd-stage HPT air seals. This proposed AD would require, for those air seals that meet certain cycles since new (CSN) criteria, inspection and removal from service of HPT air seals that fail inspection. We are proposing this AD to prevent failure of the 2nd-stage HPT air seal, which could lead to an uncontained engine failure and damage to the airplane. DATES: We must receive comments on this proposed AD by May 17, 2013. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590. SUMMARY: E:\FR\FM\18MRP1.SGM 18MRP1 Federal Register / Vol. 78, No. 52 / Monday, March 18, 2013 / Proposed Rules was prompted by cracks in 2nd-stage HPT air seals discovered during fluorescent-penetrant inspection (FPI). This proposed AD would require, for HPT air seals that meet certain CSN criteria, either on-wing eddy current inspection (ECI) or in-shop FPI, and removal from service of any HPT air seal that fails inspection. We are proposing this AD to prevent failure of the 2ndstage HPT air seal. This condition, if not corrected, could lead to an uncontained engine failure, and damage to the airplane. Examining the AD Docket You may examine the AD docket on the Internet at https:// www.regulations.gov; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this proposed AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Office (phone: 800–647–5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Ian Dargin, Aerospace Engineer, Engine & Propeller Directorate, FAA, 12 New England Executive Park, Burlington, MA 01803; phone: 781–238–7178; fax: 781– 238–7199; email: ian.dargin@faa.gov. SUPPLEMENTARY INFORMATION: pmangrum on DSK3VPTVN1PROD with PROPOSALS • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this AD, contact Pratt & Whitney, 400 Main St., East Hartford, CT 06108; phone: 860–565–8770; fax: 860–565– 4503. You may view this service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781–238–7125. Relevant Service Information Comments Invited We invite you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA– 2013–0072; Directorate Identifier 2013– NE–04–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD because of those comments. We will post all comments we receive, without change, to https:// www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD. Interim Action Discussion We propose to adopt a new AD for all PW turbofan engine models PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090–3 with 2nd-stage HPT air seal, P/N 54L041, installed. This proposed AD VerDate Mar<14>2013 14:09 Mar 15, 2013 Jkt 229001 We reviewed PW Alert Service Bulletin (ASB) PW4G–112–A72–330, Revision 1, dated February 26, 2013. The ASB describes procedures for inspecting the integrity of 2nd-stage HPT air seals and criteria for their removal from service and replacement. FAA’s Determination We are proposing this AD because we evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. Proposed AD Requirements This proposed AD would require accomplishing the actions specified in the service information described previously. We consider this proposed AD interim action. PW has not determined the root cause of the cracks discovered in 2nd-stage HPT air seals. Costs of Compliance We estimate that this AD will affect 83 engines installed on airplanes of U.S. registry. We also estimate that it would take about 5 hours to perform the inspection required by this proposed AD. The costs of an ECI and an FPI are assumed to be equal. The average labor rate is $85 per hour. Based on these figures, we estimate the total cost of the AD to U.S. operators will be $35,275. 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 PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 16621 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 proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would 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 proposed regulation: (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), (3) Will not affect intrastate aviation in Alaska to the extent that it justifies making a regulatory distinction, and (4) 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. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 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 airworthiness directive (AD): ■ Pratt & Whitney Division: Docket No. FAA– 2013–0072; Directorate Identifier 2013– NE–04–AD. (a) Comments Due Date We must receive comments by May 17, 2013. E:\FR\FM\18MRP1.SGM 18MRP1 16622 Federal Register / Vol. 78, No. 52 / Monday, March 18, 2013 / Proposed Rules Issued in Burlington, Massachusetts, on March 4, 2013. Colleen M. D’Alessandro, Assistant Manager, Engine & Propeller Directorate, Aircraft Certification Service. (b) Affected ADs None. (c) Applicability This AD applies to all Pratt & Whitney Division (PW) turbofan engine models PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090–3 with 2nd-stage high-pressure turbine (HPT) air seal, part number 54L041, installed. [FR Doc. 2013–06118 Filed 3–15–13; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF COMMERCE (d) Unsafe Condition This AD was prompted by discovery of cracks in the 2nd-stage HPT air seals. We are issuing this AD to prevent failure of the 2ndstage HPT air seal, which could lead to uncontained engine failure and damage to the airplane. National Oceanic and Atmospheric Administration (e) Compliance RIN 0648–BC26 Comply with this AD within the compliance times specified, unless already done. (1) For 2nd-stage HPT air seals that have 1,200 or fewer cycles since new (CSN) on the effective date of this AD, perform an on-wing eddy current inspection (ECI) or in-shop fluorescent-penetrant inspection (FPI) for cracks within 2,200 CSN. (2) For 2nd-stage HPT air seals that have more than 1,200 CSN on the effective date of this AD, perform an on-wing ECI or in-shop FPI for cracks within 1,000 cycles after the effective date of this AD. (3) Thereafter, reinspect with either an onwing ECI or in-shop FPI every 1,200 cycles since last inspection. (4) If you find a crack, remove the air seal from service before further flight. (5) Use paragraph 7 of the Accomplishment Instructions of PW Alert Service Bulletin (ASB) PW4G–112–A72–330, Revision 1, dated February 26, 2013, to do the on-wing ECI, except the reporting requirement of that step. Gulf of the Farallones and Monterey Bay National Marine Sanctuaries Regulations on Introduced Species (f) Alternative Methods of Compliance (AMOCs) The Manager, Engine Certification Office, FAA, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request. pmangrum on DSK3VPTVN1PROD with PROPOSALS (g) Related Information (1) For more information about this AD, contact Ian Dargin, Aerospace Engineer, Engine & Propeller Directorate, FAA, 12 New England Executive Park, Burlington, MA 01803; phone: 781–238–7178; fax: 781–238– 7199; email: ian.dargin@faa.gov. (2) Refer to PW ASB PW4G–112–A72–330, Revision 1, dated February 26, 2013, for related information. (3) For service information identified in this AD, contact Pratt & Whitney, 400 Main St., East Hartford, CT 06108; phone: 860– 565–8770; fax: 860–565–4503. You may view this service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781–238–7125. VerDate Mar<14>2013 14:09 Mar 15, 2013 Jkt 229001 15 CFR Part 922 [Docket No. 120809321–2321–01] Office of National Marine Sanctuaries (ONMS), National Oceanic and Atmospheric Administration (NOAA), Department of Commerce (DOC). ACTION: Notice of proposed rulemaking; request for comments. AGENCY: NOAA proposes to amend the terms of designation and regulations regarding the introduction of introduced species into Gulf of the Farallones and Monterey Bay national marine sanctuaries (GFNMS and MBNMS, respectively). NOAA proposes to apply the regulations to the entirety of both sanctuaries and provide exceptions for) striped bass; and mariculture activities in Tomales Bay. This action would make the regulation of introduced species consistent in all four of the national marine sanctuaries off of California. SUMMARY: Comments on this proposed rule will be accepted on or before midnight on May 17, 2013. ADDRESSES: You may submit comments on this document, identified by NOAA– NOS–2012–0113, by any of the following methods: • Electronic Submission: Submit all electronic public comments via the Federal e-Rulemaking Portal. Go to www.regulations.gov/ #!docketDetail;D=NOAA–NOS–2012– 0113, click the ‘‘Comment Now!’’ icon, complete the required fields and enter or attach your comments. • Mail: Dave Lott, Regional Operations Coordinator, West Coast Region, Office of National Marine Sanctuaries, 99 Pacific Street, STE200K, Monterey, CA 93940. Instructions: Comments must be submitted by one of the above methods DATES: PO 00000 Frm 00004 Fmt 4702 Sfmt 4702 to ensure that the comments are received, documented, and considered by ONMS. Comments sent by any other method, to any other address or individual, or received after the end of the comment period, may not be considered. All comments received are a part of the public record and will generally be posted for public viewing on www.regulations.gov without change. All personal identifying information (e.g., name, address, etc.) submitted voluntarily by the sender will be publicly accessible. Do not submit confidential business information, or otherwise sensitive or protected information. ONMS will accept anonymous comments (enter ‘‘N/A’’ in the required fields if you wish to remain anonymous). Attachments to electronic comments will be accepted in Microsoft Word or Excel, WordPerfect, or Adobe PDF file formats only. You may obtain copies of the original final environmental impact statement, record of decision, or other related documents through the following Web site: https://sanctuaries.noaa.gov/ jointplan. FOR FURTHER INFORMATION CONTACT: Dave Lott, Regional Operations Coordinator, West Coast Region, Office of National Marine Sanctuaries, 99 Pacific Street, STE 100F, Monterey, CA 93940. (831) 647–1920. SUPPLEMENTARY INFORMATION: I. Background A. GFNMS and MBNMS Background The National Oceanic and Atmospheric Administration (NOAA) established Gulf of the Farallones National Marine Sanctuary (GFNMS) in 1981 to protect and preserve a unique, productive and fragile ecological community, including the largest seabird colony in the contiguous United States and diverse and abundant marine mammals. GFNMS lies off the coast of California, to the west and north of San Francisco, and is composed of 1,279 square statute miles (966 square nautical miles) of offshore waters and submerged lands thereunder. The sanctuary boundary extends out to and around the Farallon Islands and nearshore waters (up to the mean high water line) from Bodega Head to Rocky Point in Marin County. For more information about GFNMS, see https://farallones.noaa.gov. NOAA established Monterey Bay National Marine Sanctuary (MBNMS) in 1992 for the purposes of protecting and managing the conservation, ecological, recreational, research, educational, historical, and esthetic resources and qualities of the area. MBNMS is located offshore of California’s central coast, E:\FR\FM\18MRP1.SGM 18MRP1

Agencies

[Federal Register Volume 78, Number 52 (Monday, March 18, 2013)]
[Proposed Rules]
[Pages 16620-16622]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2013-06118]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2013-0072; Directorate Identifier 2013-NE-04-AD]
RIN 2120-AA64


Airworthiness Directives; Pratt & Whitney Division Turbofan 
Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for all 
Pratt & Whitney Division (PW) turbofan engine models PW4074, PW4074D, 
PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 with a certain 2nd-stage 
high-pressure turbine (HPT) air seal part number (P/N) installed. This 
proposed AD was prompted by discovery of cracks in the 2nd-stage HPT 
air seals. This proposed AD would require, for those air seals that 
meet certain cycles since new (CSN) criteria, inspection and removal 
from service of HPT air seals that fail inspection. We are proposing 
this AD to prevent failure of the 2nd-stage HPT air seal, which could 
lead to an uncontained engine failure and damage to the airplane.

DATES: We must receive comments on this proposed AD by May 17, 2013.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC 20590.

[[Page 16621]]

     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this AD, contact Pratt & 
Whitney, 400 Main St., East Hartford, CT 06108; phone: 860-565-8770; 
fax: 860-565-4503. You may view this service information at the FAA, 
Engine & Propeller Directorate, 12 New England Executive Park, 
Burlington, MA. For information on the availability of this material at 
the FAA, call 781-238-7125.

Examining the AD Docket

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

FOR FURTHER INFORMATION CONTACT: Ian Dargin, Aerospace Engineer, Engine 
& Propeller Directorate, FAA, 12 New England Executive Park, 
Burlington, MA 01803; phone: 781-238-7178; fax: 781-238-7199; email: 
ian.dargin@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2013-0072; 
Directorate Identifier 2013-NE-04-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD because of those comments.
    We will post all comments we receive, without change, to https://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    We propose to adopt a new AD for all PW turbofan engine models 
PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 with 
2nd-stage HPT air seal, P/N 54L041, installed. This proposed AD was 
prompted by cracks in 2nd-stage HPT air seals discovered during 
fluorescent-penetrant inspection (FPI). This proposed AD would require, 
for HPT air seals that meet certain CSN criteria, either on-wing eddy 
current inspection (ECI) or in-shop FPI, and removal from service of 
any HPT air seal that fails inspection. We are proposing this AD to 
prevent failure of the 2nd-stage HPT air seal. This condition, if not 
corrected, could lead to an uncontained engine failure, and damage to 
the airplane.

Relevant Service Information

    We reviewed PW Alert Service Bulletin (ASB) PW4G-112-A72-330, 
Revision 1, dated February 26, 2013. The ASB describes procedures for 
inspecting the integrity of 2nd-stage HPT air seals and criteria for 
their removal from service and replacement.

FAA's Determination

    We are proposing this AD because we evaluated all the relevant 
information and determined the unsafe condition described previously is 
likely to exist or develop in other products of the same type design.

Proposed AD Requirements

    This proposed AD would require accomplishing the actions specified 
in the service information described previously.

Interim Action

    We consider this proposed AD interim action. PW has not determined 
the root cause of the cracks discovered in 2nd-stage HPT air seals.

Costs of Compliance

    We estimate that this AD will affect 83 engines installed on 
airplanes of U.S. registry. We also estimate that it would take about 5 
hours to perform the inspection required by this proposed AD. The costs 
of an ECI and an FPI are assumed to be equal. The average labor rate is 
$85 per hour. Based on these figures, we estimate the total cost of the 
AD to U.S. operators will be $35,275.

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 proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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 proposed 
regulation:
    (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),
    (3) Will not affect intrastate aviation in Alaska to the extent 
that it justifies making a regulatory distinction, and
    (4) 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.

List of Subjects in 14 CFR Part 39

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

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 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 airworthiness 
directive (AD):

Pratt & Whitney Division: Docket No. FAA-2013-0072; Directorate 
Identifier 2013-NE-04-AD.

(a) Comments Due Date

    We must receive comments by May 17, 2013.

[[Page 16622]]

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all Pratt & Whitney Division (PW) turbofan 
engine models PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and 
PW4090-3 with 2nd-stage high-pressure turbine (HPT) air seal, part 
number 54L041, installed.

(d) Unsafe Condition

    This AD was prompted by discovery of cracks in the 2nd-stage HPT 
air seals. We are issuing this AD to prevent failure of the 2nd-
stage HPT air seal, which could lead to uncontained engine failure 
and damage to the airplane.

(e) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.
    (1) For 2nd-stage HPT air seals that have 1,200 or fewer cycles 
since new (CSN) on the effective date of this AD, perform an on-wing 
eddy current inspection (ECI) or in-shop fluorescent-penetrant 
inspection (FPI) for cracks within 2,200 CSN.
    (2) For 2nd-stage HPT air seals that have more than 1,200 CSN on 
the effective date of this AD, perform an on-wing ECI or in-shop FPI 
for cracks within 1,000 cycles after the effective date of this AD.
    (3) Thereafter, reinspect with either an on-wing ECI or in-shop 
FPI every 1,200 cycles since last inspection.
    (4) If you find a crack, remove the air seal from service before 
further flight.
    (5) Use paragraph 7 of the Accomplishment Instructions of PW 
Alert Service Bulletin (ASB) PW4G-112-A72-330, Revision 1, dated 
February 26, 2013, to do the on-wing ECI, except the reporting 
requirement of that step.

(f) Alternative Methods of Compliance (AMOCs)

    The Manager, Engine Certification Office, FAA, may approve AMOCs 
for this AD. Use the procedures found in 14 CFR 39.19 to make your 
request.

(g) Related Information

    (1) For more information about this AD, contact Ian Dargin, 
Aerospace Engineer, Engine & Propeller Directorate, FAA, 12 New 
England Executive Park, Burlington, MA 01803; phone: 781-238-7178; 
fax: 781-238-7199; email: ian.dargin@faa.gov.
    (2) Refer to PW ASB PW4G-112-A72-330, Revision 1, dated February 
26, 2013, for related information.
    (3) For service information identified in this AD, contact Pratt 
& Whitney, 400 Main St., East Hartford, CT 06108; phone: 860-565-
8770; fax: 860-565-4503. You may view this service information at 
the FAA, Engine & Propeller Directorate, 12 New England Executive 
Park, Burlington, MA. For information on the availability of this 
material at the FAA, call 781-238-7125.

    Issued in Burlington, Massachusetts, on March 4, 2013.
Colleen M. D'Alessandro,
Assistant Manager, Engine & Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 2013-06118 Filed 3-15-13; 8:45 am]
BILLING CODE 4910-13-P
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