Airworthiness Directives; CFM International, S.A. Engines, 47404-47407 [2023-15378]

Download as PDF 47404 Federal Register / Vol. 88, No. 140 / Monday, July 24, 2023 / Proposed Rules airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 757–53A0115 RB, dated January 25, 2022. (d) Subject Air Transport Association (ATA) of America Code 53, Fuselage. (e) Unsafe Condition This AD was prompted by a crack growth analysis, which indicated that current inspections are not adequate to detect cracks in the Sections 43 and 46 upper frame at the frame splice between stringers S–13 and S– 14 before a single frame fails. The FAA is issuing this AD to address cracking at the upper frames common to the splice at stringers S–13 to S–14, which could interact with fuselage skin cracking at the stringer S– 14 lap splice. The unsafe condition, if not addressed, could result in the inability of a principal structural element to sustain limit loads and could adversely affect the structural integrity of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. lotter on DSK11XQN23PROD with PROPOSALS1 (g) Required Actions Except as specified by paragraph (h) of this AD: At the applicable times specified in the ‘‘Compliance’’ paragraph of Boeing Alert Requirements Bulletin 757–53A0115 RB, dated January 25, 2022, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 757–53A0115 RB, dated January 25, 2022. Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 757–53A0115, dated January 25, 2022, which is referred to in Boeing Alert Requirements Bulletin 757–53A0115 RB, dated January 25, 2022. (h) Exceptions to Service Information Specifications (1) Where the Compliance Time columns of the tables in the ‘‘Compliance’’ paragraph of Boeing Alert Requirements Bulletin 757– 53A0115 RB, dated January 25, 2022, use the phrase ‘‘the original issue date of Requirements Bulletin 757–53A0115 RB,’’ this AD requires using ‘‘the effective date of this AD.’’ (2) Where Boeing Alert Requirements Bulletin 757–53A0115 RB, dated January 25, 2022, specifies contacting Boeing for repair instructions or for alternative inspections: This AD requires doing the repair and doing the alternative inspections and applicable oncondition actions using a method approved in accordance with the procedures specified in paragraph (i) of this AD. (3) For Group 1, Group 2, and Group 3 airplanes, as identified in Boeing Requirements Bulletin 757–53A0115 RB, dated January 25, 2022, with APB winglets installed in accordance with STC ST01518SE: Where Table 1, Conditions 2.1, 2.2, 4.1, 4.2; Table 2, Conditions 6.1, 6.2, 8.1, 8.2; Table 3 Conditions 10.1, 10.2, 12.1, 12.2; and Table 4 Conditions 14.1, 14.2, 16.1, 16.2 VerDate Sep<11>2014 16:14 Jul 21, 2023 Jkt 259001 in the ‘‘Compliance’’ paragraph of Boeing Alert Requirements Bulletin 757–53A0115 RB, dated January 25, 2022, specify a repeat inspection interval of 3,000 flight cycles, this AD requires using a repeat inspection interval of 2,600 flight cycles. (i) Alternative Methods of Compliance (AMOCs) (1) The Manager, Continued Operational Safety Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (j) of this AD. Information may be emailed to: 9-ANMSACO-AMOC-Requests@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (3) An AMOC that provides an acceptable level of safety may be used for any repair, modification, or alteration required by this AD if it is approved by The Boeing Company Organization Designation Authorization (ODA) that has been authorized by the Manager, Continued Operational Safety Branch, FAA, to make those findings. To be approved, the repair method, modification deviation, or alteration deviation must meet the certification basis of the airplane, and the approval must specifically refer to this AD. (j) Related Information (1) For more information about this AD, contact Wayne Ha, Aviation Safety Engineer, Continued Operational Safety Branch, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: 562–627–5238; email: wayne.ha@faa.gov. (2) Service information identified in this AD that is not incorporated by reference is available at the addresses specified in paragraphs (k)(3) and (4) of this AD. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) Boeing Alert Requirements Bulletin 757–53A0115 RB, dated January 25, 2022. (ii) [Reserved] (3) For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 2600 Westminster Blvd., MC 110–SK57, Seal Beach, CA 90740–5600; telephone 562–797–1717; website myboeingfleet.com. (4) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. PO 00000 Frm 00009 Fmt 4702 Sfmt 4702 (5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, fr.inspection@nara.gov, or go to: www.archives.gov/federal-register/cfr/ibrlocations.html. Issued on May 24, 2023. Michael Linegang, Acting Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2023–15302 Filed 7–21–23; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2023–1216; Project Identifier AD–2023–00502–E] RIN 2120–AA64 Airworthiness Directives; CFM International, S.A. Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: The FAA proposes to adopt a new airworthiness directive (AD) for all CFM International, S.A. (CFM) Model LEAP–1B21, LEAP–1B23, LEAP–1B25, LEAP–1B27, LEAP–1B28, LEAP– 1B28B1, LEAP–1B28B2, LEAP– 1B28B2C, LEAP–1B28B3, LEAP– 1B28BBJ1, and LEAP–1B28BBJ2 (LEAP– 1B) engines. This proposed AD was prompted by a manufacturer investigation that revealed that certain high-pressure turbine (HPT) rotor stage 1 disks (HPT stage 1 disks) and a certain compressor rotor stages 6–10 spool were manufactured from material suspected to have reduced material properties due to iron inclusion. This proposed AD would require replacement of certain HPT stage 1 disks and a certain compressor rotor stages 6–10 spool. The FAA is proposing this AD to address the unsafe condition on these products. DATES: The FAA must receive comments on this proposed AD by September 7, 2023. SUMMARY: 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 regulations.gov. Follow the instructions for submitting comments. • Fax: (202) 493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– ADDRESSES: E:\FR\FM\24JYP1.SGM 24JYP1 Federal Register / Vol. 88, No. 140 / Monday, July 24, 2023 / Proposed Rules 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. AD Docket: You may examine the AD docket at regulations.gov by searching for and locating Docket No. FAA–2023– 1216; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this NPRM, any comments received, and other information. The street address for Docket Operations is listed above. Material Incorporated by Reference: • For service information identified in this NPRM, contact CFM International, S.A., GE Aviation Fleet Support, 1 Neumann Way, M/D Room 285, Cincinnati, OH 45215; phone: (877) 432–3272; email: aviation.fleetsupport@ ge.com. • You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (817) 222–5110. FOR FURTHER INFORMATION CONTACT: Mehdi Lamnyi, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238–7743; email: Mehdi.Lamnyi@ faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under ADDRESSES. Include ‘‘Docket No. FAA–2023–1216; Project Identifier AD– 2023–00502–E’’ at the beginning of your comments. The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may amend this proposal because of those comments. Except for Confidential Business Information (CBI) as described in the following paragraph, and other information as described in 14 CFR 11.35, the FAA will post all comments received, without change, to regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this NPRM. Confidential Business Information CBI is commercial or financial information that is both customarily and actually treated as private by its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public disclosure. If your comments responsive to this NPRM contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this NPRM, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as ‘‘PROPIN.’’ The FAA will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this NPRM. Submissions containing CBI should be sent to Mehdi Lamnyi, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. Background The FAA was notified by the manufacturer of the detection of iron inclusion in three non-LEAP–1B HPT rotor disks. Further investigation by the manufacturer determined that the iron inclusion is attributed to deficiencies in the manufacturing process. The investigation by the manufacturer also determined that certain LEAP–1B HPT stage 1 disks and a certain compressor rotor stages 6–10 spool manufactured using the same process may have reduced material properties and a lower fatigue life capability due to iron inclusion, which may cause premature fracture and subsequent uncontained 47405 failure of certain HPT stage 1 disks and a certain compressor rotor stages 6–10 spool. This condition, if not addressed, could result in uncontained debris release, damage to the engine, and damage to the aircraft. FAA’s Determination The FAA is issuing this NPRM after determining that the unsafe condition described previously is likely to exist or develop on other products of the same type design. Related Service Information Under 1 CFR Part 51 The FAA reviewed CFM Service Bulletin LEAP–1B–72–00–0392–01A– 930A–D, Issue 001, dated March 7, 2023. This service information identifies the part numbers and serial numbers of HPT stage 1 disks and a compressor rotor stages 6–10 spool with potentially reduced material properties and specifies procedures for replacement of these parts. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in ADDRESSES. Proposed AD Requirements in This NPRM This proposed AD would require replacement of certain HPT stage 1 disks and a certain compressor rotor stages 6– 10 spool. This proposed AD would also prohibit installation of an HPT stage 1 disk or compressor rotor stages 6–10 spool that has a part number and serial number identified in the service information onto any engine. Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 39 engines installed on airplanes of U.S. registry. These 39 engines would require replacement of the HPT stage 1 disk. The FAA estimates that there are no engines installed on airplanes of U.S. registry that would require replacement of the compressor rotor stages 6–10 spool. The FAA estimates the following costs to comply with this proposed AD: lotter on DSK11XQN23PROD with PROPOSALS1 ESTIMATED COSTS Cost per product Cost on U.S. operators Action Labor cost Parts cost Replace HPT stage 1 disk ............. 8 work-hours × $85 per hour = $680. 8 work-hours × $85 per hour = $680. $215,635 (pro-rated) ...................... $216,315 $8,436,285 $37,660 (pro-rated) ........................ 38,340 0 Replace compressor rotor stages 6–10 spool. VerDate Sep<11>2014 16:14 Jul 21, 2023 Jkt 259001 PO 00000 Frm 00010 Fmt 4702 Sfmt 4702 E:\FR\FM\24JYP1.SGM 24JYP1 47406 Federal Register / Vol. 88, No. 140 / Monday, July 24, 2023 / Proposed Rules § 39.13 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. The FAA is 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 The FAA 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) Would not affect intrastate aviation in Alaska, and (3) Would 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. lotter on DSK11XQN23PROD with PROPOSALS1 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. VerDate Sep<11>2014 16:14 Jul 21, 2023 Jkt 259001 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive: ■ CFM International, S.A.: Docket No. FAA– 2023–1216; Project Identifier AD–2023– 00502–E. (a) Comments Due Date The FAA must receive comments on this airworthiness directive (AD) by September 7, 2023. (h) Definition (b) Affected ADs None. (c) Applicability This AD applies to CFM International, S.A. (CFM) Model LEAP–1B21, LEAP–1B23, LEAP–1B25, LEAP–1B27, LEAP–1B28, LEAP–1B28B1, LEAP–1B28B2, LEAP– 1B28B2C, LEAP–1B28B3, LEAP–1B28BBJ1, and LEAP–1B28BBJ2 engines. (d) Subject Joint Aircraft System Component (JASC) Code 7230, Turbine Engine Compressor Section; 7250, Turbine Section. (e) Unsafe Condition This AD was prompted by a manufacturer investigation that revealed that certain highpressure turbine (HPT) rotor stage 1 disks (HPT stage 1 disks) and a certain compressor rotor stages 6–10 spool were manufactured from material suspected to have reduced material properties due to iron inclusion. The FAA is issuing this AD to prevent fracture and subsequent uncontained failure of certain HPT stage 1 disks and a certain compressor rotor stages 6–10 spool. The unsafe condition, if not addressed, could result in uncontained debris release, damage to the engine, and damage to the aircraft. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) For engines with an installed HPT stage 1 disk having a part number (P/N) and serial number (S/N) identified in Compliance, paragraph 3.E., Tables 1 through 2, of CFM Service Bulletin (SB) LEAP–1B–72–00–0392– 01A–930A–D, Issue 001, dated March 7, 2023 (CFM SB LEAP–1B–72–00–0392–01A–930A– D): At the next piece-part exposure of the HPT stage 1 disk, or before exceeding the applicable cycles since new (CSN) threshold identified in Compliance, paragraph 3.E., Tables 1 through 2, of CFM SB LEAP–1B–72– 00–0392–01A–930A–D, whichever occurs first after the effective date of this AD; or if the applicable CSN threshold has been exceeded as of the effective date of this AD, within 50 flight cycles (FCs) from the effective date of this AD; remove the HPT stage 1 disk from service and replace with a part eligible for installation. (2) For engines with an installed compressor rotor stages 6–10 spool having a P/N and S/N identified in Compliance, paragraph 3.E., Table 3, of CFM SB LEAP– 1B–72–00–0392–01A–930A–D: At the next PO 00000 Frm 00011 Fmt 4702 piece-part exposure of the compressor rotor stages 6–10 spool, or before exceeding the applicable CSN threshold identified in Compliance, paragraph 3.E., Table 3, of CFM SB LEAP–1B–72–00–0392–01A–930A–D, whichever occurs first after the effective date of this AD; or if the applicable CSN threshold has been exceeded as of the effective date of this AD, within 50 FCs from the effective date of this AD; remove the compressor rotor stages 6–10 spool from service and replace with a part eligible for installation. Sfmt 4702 For the purpose of this AD, a ‘‘part eligible for installation’’ is an HPT stage 1 disk or compressor rotor stages 6–10 spool that does not have a P/N and S/N identified in Compliance, paragraph 3.E., Tables 1 through 3 of CFM SB LEAP–1B–72–00–0392–01A– 930A–D. (i) Installation Prohibition After the effective date of this AD, do not install an HPT stage 1 disk or compressor rotor stages 6–10 spool that has a P/N and S/N identified in Compliance, paragraph 3.E., Tables 1 through 3 of CFM SB LEAP–1B–72– 00–0392–01A–930A–D. (j) Alternative Methods of Compliance (AMOCs) (1) The Manager, AIR–520 Continued Operational Safety Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (k) of this AD and email to: ANE-AD-AMOC@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. (k) Related Information For more information about this AD, contact Mehdi Lamnyi, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238–7743; email: mehdi.lamnyi@faa.gov. (l) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) CFM International, S.A. Service Bulletin LEAP–1B–72–00–0392–01A–930A–D, Issue 001, dated March 7, 2023. (ii) [Reserved] (3) For service information identified in this AD, contact CFM International, S.A., GE Aviation Fleet Support, 1 Neumann Way, M/ D Room 285, Cincinnati, OH 45215; phone: (877) 432–3272; email: aviation.fleetsupport@ge.com. E:\FR\FM\24JYP1.SGM 24JYP1 Federal Register / Vol. 88, No. 140 / Monday, July 24, 2023 / Proposed Rules (4) You may view this service information at FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (817) 222–5110. (5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email: fr.inspection@nara.gov, or go to: www.archives.gov/federal-register/cfr/ibrlocations.html. Issued on June 12, 2023. Ross Landes, Deputy Director for Regulatory Operations, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2023–15378 Filed 7–21–23; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket Number USCG–2023–0490] RIN 1625–AA00 Safety Zone; Mercury Powerboat Race; Sheboygan Harbor, Sheboygan, Wisconsin Coast Guard, DHS. Notice of proposed rulemaking. AGENCY: ACTION: The Coast Guard is proposing to establish a two temporary safety zones for certain navigable waters in and around Sheboygan Harbor in Sheboygan, WI. The safety zones are needed to protect personnel, vessels, and the marine environment from potential hazards association from the Mercury Powerboat Race event. This proposed rulemaking would prohibit entry of vessels or persons into these zones unless specifically authorized by the Captain of the Port Lake Michigan or a designated representative. We invite your comments on this proposed rulemaking. DATES: Comments and related material must be received by the Coast Guard on or before the abridged comment period of 15 days beginning on July 21, 2023 and ending on August 4, 2023. ADDRESSES: You may submit comments identified by docket number USCG– 2023–0490 using the Federal Decision Making Portal at https:// www.regulations.gov. See the ‘‘Public Participation and Request for Comments’’ portion of the SUPPLEMENTARY INFORMATION section for lotter on DSK11XQN23PROD with PROPOSALS1 SUMMARY: VerDate Sep<11>2014 16:14 Jul 21, 2023 Jkt 259001 further instructions on submitting comments. If you have questions about this proposed rulemaking, call or email Sector Lake Michigan Waterways Management Division, U.S. Coast Guard; telephone 414–747–7136, email brianna.m.henry@ uscg.mil. SUPPLEMENTARY INFORMATION: FOR FURTHER INFORMATION CONTACT: I. Table of Abbreviations CFR Code of Federal Regulations DHS Department of Homeland Security FR Federal Register NPRM Notice of proposed rulemaking § Section U.S.C. United States Code 47407 prohibited unless authorized by the COTP or a designated representative. The regulatory text we are proposing appears at the end of this document. IV. Regulatory Analyses We developed this proposed rule after considering numerous statutes and Executive orders related to rulemaking. Below we summarize our analyses based on a number of these statutes and Executive orders, and we discuss First Amendment rights of protestors. II. Background, Purpose, and Legal Basis On February 8, 2023, Powerboat P1 USA notified the Coast Guard that was planning on hosting the Mercury Racing Midwest Challenge in Sheboygan, WI from August 11 to August 13, 2023. The race event will take place in two locations in and near the Sheboygan Harbor. The Captain of the Port Sector Lake Michigan (COTP) has determined that potential hazards associated with the boat races would be a safety concern for anyone within the two designated race areas. The purpose of this rulemaking is to ensure the safety of vessels and the navigable waters within and near the two race areas before, during, and after the scheduled event. The Coast Guard is proposing this rulemaking under authority in 46 U.S.C. 70034 (previously 33 U.S.C. 1231).] A. Regulatory Planning and Review Executive Orders 12866 and 13563 direct agencies to assess the costs and benefits of available regulatory alternatives and, if regulation is necessary, to select regulatory approaches that maximize net benefits. This NPRM has not been designated a ‘‘significant regulatory action,’’ under Executive Order 12866. Accordingly, the NPRM has not been reviewed by the Office of Management and Budget (OMB). This regulatory action determination is based on the size, location, and duration of the safety zones. The safety zones created by this proposed rule will impact a small part of the waterway and is designed to minimize its impact on navigable waters. This proposed rule will prohibit entry into certain navigable waters of Lake Michigan and Sheboygan Harbor near in Sheboygan, WI and it is not anticipated to exceed 3 days in duration. Moreover, under certain conditions vessels may still transit through the safety zone when permitted by the COTP Lake Michigan. III. Discussion of Proposed Rule The COTP is proposing to establish two safety zones from 8 a.m. on August 11 to 6:30 p.m. on August 13, 2023. One of the safety zones would be located off shore of Sheboygan, WI and would cover all navigable waters within the offshore course located within the following coordinates: NW corner 43°44′54.32″ N, 87°42′5.77″ W, NE corner 43°44′54.10″ N, 87°41′3.21″ W, SW corner 43°42′27.10″ N, 87°42′10.11″ W, SE corner 43°42′26.73″ N, 87°40′54.66″ W. The other safety zone would be located in a triangular area within Sheboygan Harbor and would cover all navigable waters within the following coordinates: 43°44′56.76″ N, 87°41′05.60″ W, 43°45′07.29″ N, 87°41′51.07″ W, 43°44′57.24″ N, 87°42′05.24″ W. The duration of the zones is intended to protect personnel, vessels, and the marine environment in these navigable waters during the race events. Entry into, transiting, or anchoring within the safety zone is B. Impact on Small Entities The Regulatory Flexibility Act of 1980, 5 U.S.C. 601–612, as amended, requires Federal agencies to consider the potential impact of regulations on small entities during rulemaking. The term ‘‘small entities’’ comprises small businesses, not-for-profit organizations that are independently owned and operated and are not dominant in their fields, and governmental jurisdictions with populations of less than 50,000. The Coast Guard certifies under 5 U.S.C. 605(b) that this proposed rule would not have a significant economic impact on a substantial number of small entities. While some owners or operators of vessels intending to transit the safety zones may be small entities, for the reasons stated in section IV.A above, this proposed rule would not have a significant economic impact on any vessel owner or operator. If you think that your business, organization, or governmental jurisdiction qualifies as a small entity PO 00000 Frm 00012 Fmt 4702 Sfmt 4702 E:\FR\FM\24JYP1.SGM 24JYP1

Agencies

[Federal Register Volume 88, Number 140 (Monday, July 24, 2023)]
[Proposed Rules]
[Pages 47404-47407]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-15378]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-1216; Project Identifier AD-2023-00502-E]
RIN 2120-AA64


Airworthiness Directives; CFM International, S.A. Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for all CFM International, S.A. (CFM) Model LEAP-1B21, LEAP-1B23, LEAP-
1B25, LEAP-1B27, LEAP-1B28, LEAP-1B28B1, LEAP-1B28B2, LEAP-1B28B2C, 
LEAP-1B28B3, LEAP-1B28BBJ1, and LEAP-1B28BBJ2 (LEAP-1B) engines. This 
proposed AD was prompted by a manufacturer investigation that revealed 
that certain high-pressure turbine (HPT) rotor stage 1 disks (HPT stage 
1 disks) and a certain compressor rotor stages 6-10 spool were 
manufactured from material suspected to have reduced material 
properties due to iron inclusion. This proposed AD would require 
replacement of certain HPT stage 1 disks and a certain compressor rotor 
stages 6-10 spool. The FAA is proposing this AD to address the unsafe 
condition on these products.

DATES: The FAA must receive comments on this proposed AD by September 
7, 2023.

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 regulations.gov. Follow 
the instructions for submitting comments.
     Fax: (202) 493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-

[[Page 47405]]

30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue 
SE, Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    AD Docket: You may examine the AD docket at regulations.gov by 
searching for and locating Docket No. FAA-2023-1216; or in person at 
Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, 
except Federal holidays. The AD docket contains this NPRM, any comments 
received, and other information. The street address for Docket 
Operations is listed above.
    Material Incorporated by Reference:
     For service information identified in this NPRM, contact 
CFM International, S.A., GE Aviation Fleet Support, 1 Neumann Way, M/D 
Room 285, Cincinnati, OH 45215; phone: (877) 432-3272; email: 
[email protected].
     You may view this service information at the FAA, 
Airworthiness Products Section, Operational Safety Branch, 1200 
District Avenue, Burlington, MA 01803. For information on the 
availability of this material at the FAA, call (817) 222-5110.

FOR FURTHER INFORMATION CONTACT: Mehdi Lamnyi, Aviation Safety 
Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: 
(781) 238-7743; email: [email protected].

SUPPLEMENTARY INFORMATION: 

Comments Invited

    The FAA invites you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under ADDRESSES. Include ``Docket No. FAA-2023-1216; Project Identifier 
AD-2023-00502-E'' at the beginning of your comments. The most helpful 
comments reference a specific portion of the proposal, explain the 
reason for any recommended change, and include supporting data. The FAA 
will consider all comments received by the closing date and may amend 
this proposal because of those comments.
    Except for Confidential Business Information (CBI) as described in 
the following paragraph, and other information as described in 14 CFR 
11.35, the FAA will post all comments received, without change, to 
regulations.gov, including any personal information you provide. The 
agency will also post a report summarizing each substantive verbal 
contact received about this NPRM.

Confidential Business Information

    CBI is commercial or financial information that is both customarily 
and actually treated as private by its owner. Under the Freedom of 
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public 
disclosure. If your comments responsive to this NPRM contain commercial 
or financial information that is customarily treated as private, that 
you actually treat as private, and that is relevant or responsive to 
this NPRM, it is important that you clearly designate the submitted 
comments as CBI. Please mark each page of your submission containing 
CBI as ``PROPIN.'' The FAA will treat such marked submissions as 
confidential under the FOIA, and they will not be placed in the public 
docket of this NPRM. Submissions containing CBI should be sent to Mehdi 
Lamnyi, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des 
Moines, WA 98198. Any commentary that the FAA receives which is not 
specifically designated as CBI will be placed in the public docket for 
this rulemaking.

Background

    The FAA was notified by the manufacturer of the detection of iron 
inclusion in three non-LEAP-1B HPT rotor disks. Further investigation 
by the manufacturer determined that the iron inclusion is attributed to 
deficiencies in the manufacturing process. The investigation by the 
manufacturer also determined that certain LEAP-1B HPT stage 1 disks and 
a certain compressor rotor stages 6-10 spool manufactured using the 
same process may have reduced material properties and a lower fatigue 
life capability due to iron inclusion, which may cause premature 
fracture and subsequent uncontained failure of certain HPT stage 1 
disks and a certain compressor rotor stages 6-10 spool. This condition, 
if not addressed, could result in uncontained debris release, damage to 
the engine, and damage to the aircraft.

FAA's Determination

    The FAA is issuing this NPRM after determining that the unsafe 
condition described previously is likely to exist or develop on other 
products of the same type design.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed CFM Service Bulletin LEAP-1B-72-00-0392-01A-930A-
D, Issue 001, dated March 7, 2023. This service information identifies 
the part numbers and serial numbers of HPT stage 1 disks and a 
compressor rotor stages 6-10 spool with potentially reduced material 
properties and specifies procedures for replacement of these parts. 
This service information is reasonably available because the interested 
parties have access to it through their normal course of business or by 
the means identified in ADDRESSES.

Proposed AD Requirements in This NPRM

    This proposed AD would require replacement of certain HPT stage 1 
disks and a certain compressor rotor stages 6-10 spool. This proposed 
AD would also prohibit installation of an HPT stage 1 disk or 
compressor rotor stages 6-10 spool that has a part number and serial 
number identified in the service information onto any engine.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 39 engines installed on airplanes of U.S. registry. These 39 
engines would require replacement of the HPT stage 1 disk. The FAA 
estimates that there are no engines installed on airplanes of U.S. 
registry that would require replacement of the compressor rotor stages 
6-10 spool.
    The FAA estimates the following costs to comply with this proposed 
AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
              Action                      Labor cost             Parts cost           product        operators
----------------------------------------------------------------------------------------------------------------
Replace HPT stage 1 disk..........  8 work-hours x $85     $215,635 (pro-rated).        $216,315      $8,436,285
                                     per hour = $680.
Replace compressor rotor stages 6-  8 work-hours x $85     $37,660 (pro-rated)..          38,340               0
 10 spool.                           per hour = $680.
----------------------------------------------------------------------------------------------------------------


[[Page 47406]]

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.
    The FAA is 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

    The FAA 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) Would not affect intrastate aviation in Alaska, and
    (3) Would 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:

CFM International, S.A.: Docket No. FAA-2023-1216; Project 
Identifier AD-2023-00502-E.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by September 7, 2023.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to CFM International, S.A. (CFM) Model LEAP-
1B21, LEAP-1B23, LEAP-1B25, LEAP-1B27, LEAP-1B28, LEAP-1B28B1, LEAP-
1B28B2, LEAP-1B28B2C, LEAP-1B28B3, LEAP-1B28BBJ1, and LEAP-1B28BBJ2 
engines.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7230, Turbine Engine 
Compressor Section; 7250, Turbine Section.

(e) Unsafe Condition

    This AD was prompted by a manufacturer investigation that 
revealed that certain high-pressure turbine (HPT) rotor stage 1 
disks (HPT stage 1 disks) and a certain compressor rotor stages 6-10 
spool were manufactured from material suspected to have reduced 
material properties due to iron inclusion. The FAA is issuing this 
AD to prevent fracture and subsequent uncontained failure of certain 
HPT stage 1 disks and a certain compressor rotor stages 6-10 spool. 
The unsafe condition, if not addressed, could result in uncontained 
debris release, damage to the engine, and damage to the aircraft.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Required Actions

    (1) For engines with an installed HPT stage 1 disk having a part 
number (P/N) and serial number (S/N) identified in Compliance, 
paragraph 3.E., Tables 1 through 2, of CFM Service Bulletin (SB) 
LEAP-1B-72-00-0392-01A-930A-D, Issue 001, dated March 7, 2023 (CFM 
SB LEAP-1B-72-00-0392-01A-930A-D): At the next piece-part exposure 
of the HPT stage 1 disk, or before exceeding the applicable cycles 
since new (CSN) threshold identified in Compliance, paragraph 3.E., 
Tables 1 through 2, of CFM SB LEAP-1B-72-00-0392-01A-930A-D, 
whichever occurs first after the effective date of this AD; or if 
the applicable CSN threshold has been exceeded as of the effective 
date of this AD, within 50 flight cycles (FCs) from the effective 
date of this AD; remove the HPT stage 1 disk from service and 
replace with a part eligible for installation.
    (2) For engines with an installed compressor rotor stages 6-10 
spool having a P/N and S/N identified in Compliance, paragraph 3.E., 
Table 3, of CFM SB LEAP-1B-72-00-0392-01A-930A-D: At the next piece-
part exposure of the compressor rotor stages 6-10 spool, or before 
exceeding the applicable CSN threshold identified in Compliance, 
paragraph 3.E., Table 3, of CFM SB LEAP-1B-72-00-0392-01A-930A-D, 
whichever occurs first after the effective date of this AD; or if 
the applicable CSN threshold has been exceeded as of the effective 
date of this AD, within 50 FCs from the effective date of this AD; 
remove the compressor rotor stages 6-10 spool from service and 
replace with a part eligible for installation.

(h) Definition

    For the purpose of this AD, a ``part eligible for installation'' 
is an HPT stage 1 disk or compressor rotor stages 6-10 spool that 
does not have a P/N and S/N identified in Compliance, paragraph 
3.E., Tables 1 through 3 of CFM SB LEAP-1B-72-00-0392-01A-930A-D.

(i) Installation Prohibition

    After the effective date of this AD, do not install an HPT stage 
1 disk or compressor rotor stages 6-10 spool that has a P/N and S/N 
identified in Compliance, paragraph 3.E., Tables 1 through 3 of CFM 
SB LEAP-1B-72-00-0392-01A-930A-D.

(j) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, AIR-520 Continued Operational Safety Branch, 
FAA, has the authority to approve AMOCs for this AD, if requested 
using the procedures found in 14 CFR 39.19. In accordance with 14 
CFR 39.19, send your request to your principal inspector or local 
Flight Standards District Office, as appropriate. If sending 
information directly to the manager of the certification office, 
send it to the attention of the person identified in paragraph (k) 
of this AD and email to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.

(k) Related Information

    For more information about this AD, contact Mehdi Lamnyi, 
Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, 
WA 98198; phone: (781) 238-7743; email: [email protected]

(l) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (i) CFM International, S.A. Service Bulletin LEAP-1B-72-00-0392-
01A-930A-D, Issue 001, dated March 7, 2023.
    (ii) [Reserved]
    (3) For service information identified in this AD, contact CFM 
International, S.A., GE Aviation Fleet Support, 1 Neumann Way, M/D 
Room 285, Cincinnati, OH 45215; phone: (877) 432-3272; email: 
[email protected].

[[Page 47407]]

    (4) You may view this service information at FAA, Airworthiness 
Products Section, Operational Safety Branch, 1200 District Avenue, 
Burlington, MA 01803. For information on the availability of this 
material at the FAA, call (817) 222-5110.
    (5) You may view this service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, email: [email protected], or go to: www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on June 12, 2023.
Ross Landes,
Deputy Director for Regulatory Operations, Compliance & Airworthiness 
Division, Aircraft Certification Service.
[FR Doc. 2023-15378 Filed 7-21-23; 8:45 am]
BILLING CODE 4910-13-P
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