AD 2026-18-03

56575 Federal Register / Vol. 91, No. 170 / Thursday, September 3, 2026 / Rules and Regulations www.regulations.gov. Search for Docket ID NRC–2026–2476. Address questions about NRC dockets to Helen Chang; telephone: 301–415–3228; email: Helen.Chang@nrc.gov . For technical questions, contact the individual listed in the FOR FURTHER INFORMATION CONTACT section of this document. • NRC’s Agencywide Documents Access and Management System (ADAMS): You may obtain publicly available documents online in the ADAMS Public Documents collection at https://www.nrc.gov/reading-rm/ adams.html. To begin the search, select ‘‘Begin ADAMS Public Search.’’ For problems with ADAMS, please contact the NRC’s Public Document Room (PDR) reference staff at 1–800–397–4209, at 301–415–4737, or by email to PDR.Resource@nrc.gov. The revision of Certificate of Compliance No. 1032, the associated changes to the technical specifications, and the final safety evaluation report are available in ADAMS under Accession No. ML26240A234. • NRC’s PDR: The PDR, where you may examine and order copies of publicly available documents, is open by appointment. To make an appointment to visit the PDR, please send an email to PDR.Resource@nrc.gov or call 1–800–397–4209 or 301–415– 4737, between 8 a.m. and 4 p.m. eastern time, Monday through Friday, except Federal holidays. FOR FURTHER INFORMATION CONTACT : Denise Edwards, Office of Nuclear Material Safety and Safeguards, U.S. Nuclear Regulatory Commission, Washington, DC 20555–0001; telephone: 301–415–7204, email: Denise.Edwards@ nrc.gov and John-Chau Nguyen, Office of Nuclear Material Safety and Safeguards, U.S. Nuclear Regulatory Commission, Washington, DC 20555– 0001; telephone: 301–415–0262, email: John-Chau.Nguyen@nrc.gov. Both are staff of the U.S. Nuclear Regulatory Commission, Washington, DC 20555– 0001. SUPPLEMENTARY INFORMATION : On July 23, 2026 (91 FR 46243), the NRC published a direct final rule amending its regulations in part 72 of title 10 of the Code of Federal Regulations to include Amendment No. 10 to Certificate of Compliance No. 1032. In the direct final rule, the NRC stated that if no significant adverse comments were received, the direct final rule would become effective on October 6, 2026. The NRC received and docketed three comment submissions on the companion proposed rule (91 FR 46314; July 23, 2026). Electronic copies of the comments can be obtained from the Federal Rulemaking website at https:// www.regulations.gov under Docket ID NRC–2026–2476 and are also available in ADAMS under Accession No. ML26244A087. The NRC evaluated the comments against the criteria described in the direct final rule and determined that the comments were not significant and adverse. Therefore, this direct final rule will become effective as scheduled. Dated: September 1, 2026. For the Nuclear Regulatory Commission. Araceli Billoch Colon, Chief, Rulemaking Projects Branch 2, Division of Guidance, Rulemaking, Economic Analysis, and Technical Editing Office of Nuclear Material Safety and Safeguards. [FR Doc. 2026–18107 Filed 9–2–26; 8:45 am] BILLING CODE 7590–01–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2026–8793; Project Identifier MCAI–2026–00772–T; Amendment 39–23458; AD 2026–18–03] RIN 2120–AA64 Airworthiness Directives; Airbus SAS Airplanes AGENCY : Federal Aviation Administration (FAA), DOT. ACTION : Final rule; request for comments. SUMMARY : The FAA is adopting a new airworthiness directive (AD) for certain Airbus SAS Model A318–112; Model A319–115, –132, and –133; Model A320–214, –216, –232, –233, –251N, and –271N; and Model A321–211, –213, –231, –271N, –251NX, –253NX, and –271NX airplanes. This AD was prompted by a quality escape identified in the production assembly line on the main landing gear (MLG) support rib 5 lugs, which resulted in tool mark damage in the bore of the forward and aft lugs. This AD requires repetitive detailed visual inspections (DVIs) of the affected parts and applicable corrective actions. This AD also provides a one- time special detailed inspection (SDI) as a terminating action for the repetitive inspections. The FAA is issuing this AD to address the unsafe condition on these products. DATES : This AD is effective September 18, 2026. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of September 18, 2026. The FAA must receive comments on this AD by October 19, 2026. 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– 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 under Docket No. FAA–2026–8793; 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 final rule, the mandatory continuing airworthiness information (MCAI), any comments received, and other information. The street address for Docket Operations is listed above. Material Incorporated by Reference: • For European Union Aviation Safety Agency (EASA) material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu. You may find this material on the EASA website at ad.easa.europa.eu. • You may view this material 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. It is also available at regulations.gov under Docket No. FAA–2026–8793. FOR FURTHER INFORMATION CONTACT : Andrew Younglove, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206– 231–3644; email: Andrew.E.Younglove@ faa.gov. SUPPLEMENTARY INFORMATION : Comments Invited The FAA invites you to send any written data, views, or arguments about this final rule. Send your comments using a method listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2026–8793; Project Identifier MCAI–2026–00772–T’’ at the beginning of your comments. The most helpful comments reference a specific portion of the final rule, explain the reason for any recommended change, and include supporting data. The FAA will consider VerDate Sep<11>2014 16:06 Sep 02, 2026 Jkt 268001 PO 00000 Frm 00027 Fmt 4700 Sfmt 4700 E:\FR\FM\03SER1.SGM 03SER1 khammond on DSK9W7S144PROD with RULES

56576 Federal Register / Vol. 91, No. 170 / Thursday, September 3, 2026 / Rules and Regulations all comments received by the closing date and may amend this final rule 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 final rule. 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 AD 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 AD, 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 AD. Submissions containing CBI should be sent to Andrew Younglove, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206–231–3644; email: Andrew.E.Younglove@faa.gov. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 2026–0142, dated July 20, 2026 (EASA AD 2026– 0142) (also referred to as the MCAI), to correct an unsafe condition for certain Model A318–112; Model A319–115, –132, –133; Model A320–214, –216, –232, –233, –251N, –271N; and Model A321–211, –213, –231, –271N, –251NX, –253NX, and –271NX airplanes. The MCAI states that a quality escape was identified in the production assembly line on the MLG support rib 5 lugs. The non-conformity on the affected MLG support ribs is tool mark damage in the bore of the forward and aft lugs due to an improper bush removal technique used by the supplier at the assembly stage. This condition, if not corrected, could lead to fatigue damage of the MLG support rib 5, a safe-life principal structural element (PSE), which could result in structural failure and subsequent collapse of the MLG. The FAA is issuing this AD to address the unsafe condition on these products. You may examine the MCAI in the AD docket at regulations.gov under Docket No. FAA–2026–8793. Material Incorporated by Reference Under 1 CFR Part 51 EASA AD 2026–0142 specifies procedures for repetitive DVIs of the MLG support rib 5 lugs for discrepancies, a one-time SDI of the lug bore holes of each affected part for discrepancies as a terminating action for the repetitive inspections, and applicable corrective actions ( i.e., contacting the manufacturer for repair instructions and doing the repair). Discrepancies include cracking, corrosion, any out of tolerance dimension, signs of bush rotation or migration, presence of liner bushes, ovality, nicks ( e.g., any scratches, shallow dents, scoring), on the forward lug, aft lug, or between the forward and aft lugs, or identifying a part having a part number (P/N) or serial number (S/ N) other than the ones listed in Appendix 1 of EASA AD 2026–0142. This material is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. FAA’s Determination These products have been approved by the civil aviation authority of another country and are approved for operation in the United States. Pursuant to the FAA’s bilateral agreement with this State of Design Authority, that authority has notified the FAA of the unsafe condition described in the MCAI referenced above. The FAA is issuing this AD after determining that the unsafe condition described previously is likely to exist or develop on other products of the same type design. AD Requirements This AD requires accomplishing the actions specified in EASA AD 2026– 0142 described previously, except for any differences identified as exceptions in the regulatory text of this AD. See ‘‘Differences Between This AD and the MCAI for a discussion of the general differences included in this AD. Differences Between This AD and the MCAI EASA AD 2026–0142 paragraph (2) requires an SDI within specified compliance times. However, the planned compliance times for that action allows enough time to provide notice and opportunity for prior public comment on the merits of the action. Therefore, this AD does not require the SDI. However, the FAA is allowing the SDI as an optional terminating action as specified in paragraph (4) of EASA AD 2026–0142. The FAA is considering further rulemaking to mandate the terminating action within the specific compliance times. Explanation of Required Compliance Information In the FAA’s ongoing efforts to improve the efficiency of the AD process, the FAA developed a process to use some civil aviation authority (CAA) ADs as the primary source of information for compliance with requirements for corresponding FAA ADs. The FAA has been coordinating this process with manufacturers and CAAs. As a result, EASA AD 2026–0142 is incorporated by reference in this AD. This AD requires compliance with EASA AD 2026–0142 in its entirety through that incorporation, except for any differences identified as exceptions in the regulatory text of this AD. Using common terms that are the same as the heading of a particular section in EASA AD 2026–0142 does not mean that operators need comply only with that section. For example, where the AD requirement refers to ‘‘all required actions and compliance times,’’ compliance with this AD requirement is not limited to the section titled ‘‘Required Action(s) and Compliance Time(s)’’ in EASA AD 2026–0142. Material required by EASA AD 2026– 0142 for compliance will be available at regulations.gov under Docket No. FAA– 2026–8793 after this AD is published. Interim Action The FAA considers that this AD is an interim action. The FAA is considering further rulemaking to mandate the terminating action. Justification for Immediate Adoption and Determination of the Effective Date Section 553(b) of the Administrative Procedure Act (APA) (5 U.S.C. 551 et seq. ) authorizes agencies to dispense with notice and comment procedures for rules when the agency, for ‘‘good cause,’’ finds that those procedures are ‘‘impracticable, unnecessary, or contrary to the public interest.’’ Under this section, an agency, upon finding good cause, may issue a final rule without providing notice and seeking comment prior to issuance. Further, section 553(d) of the APA authorizes agencies to make rules effective in less than thirty days, upon a finding of good cause. VerDate Sep<11>2014 16:06 Sep 02, 2026 Jkt 268001 PO 00000 Frm 00028 Fmt 4700 Sfmt 4700 E:\FR\FM\03SER1.SGM 03SER1 khammond on DSK9W7S144PROD with RULES

56577 Federal Register / Vol. 91, No. 170 / Thursday, September 3, 2026 / Rules and Regulations An unsafe condition exists that requires the immediate adoption of this AD without providing an opportunity for public comments prior to adoption. The FAA has found that the risk to the flying public justifies forgoing notice and comment prior to adoption of this rule because fatigue damage of the MLG support rib 5, a safe-life PSE, could result in structural failure and subsequent collapse of the MLG. Additionally, the compliance time in this AD is shorter than the time necessary for the public to comment and for publication of the final rule. Accordingly, notice and opportunity for prior public comment are impracticable and contrary to the public interest pursuant to 5 U.S.C. 553(b). In addition, the FAA finds that good cause exists pursuant to 5 U.S.C. 553(d) for making this amendment effective in less than 30 days, for the same reasons the FAA found good cause to forgo notice and comment. Regulatory Flexibility Act The requirements of the Regulatory Flexibility Act (RFA) do not apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt a rule without prior notice and comment. Because the FAA has determined that it has good cause to adopt this rule without notice and comment, RFA analysis is not required. Costs of Compliance The FAA estimates that this AD affects 29 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD: E STIMATED C OSTS FOR R EQUIRED A CTIONS Labor cost Parts cost Cost per product Cost on U.S. operators 3 work-hours × $85 per hour = $255 .......................................................................................... $0 $255 $7,395 E STIMATED C OSTS FOR O PTIONAL A CTIONS Labor cost Parts cost Cost per product 345 work-hours × $85 per hour = $29,325 ............................................. Up to $30,300 ................................ Up to $59,625. The FAA has received no definitive data on which to base the cost estimates for the on-condition actions specified in this AD. According to the manufacturer, some or all of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected operators. The FAA does not control warranty coverage for affected operators. As a result, the FAA has included all known costs in the cost estimate. Paperwork Reduction Act A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a currently valid OMB Control Number. The OMB Control Number for this information collection is 2120–0056. Public reporting for this collection of information is estimated to take approximately 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. All responses to this collection of information are mandatory. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to: Information Collection Clearance Officer, Federal Aviation Administration, 10101 Hillwood Parkway, Fort Worth, TX 76177–1524. 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 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 that this AD: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, and (2) Will not affect intrastate aviation in Alaska. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. 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 airworthiness directive: 2026–18–03 Airbus SAS: Amendment 39– 23458; Docket No. FAA–2026–8793; Project Identifier MCAI–2026–00772–T. VerDate Sep<11>2014 16:06 Sep 02, 2026 Jkt 268001 PO 00000 Frm 00029 Fmt 4700 Sfmt 4700 E:\FR\FM\03SER1.SGM 03SER1 khammond on DSK9W7S144PROD with RULES

56578 Federal Register / Vol. 91, No. 170 / Thursday, September 3, 2026 / Rules and Regulations (a) Effective Date This airworthiness directive (AD) is effective September 18, 2026. (b) Affected ADs None. (c) Applicability This AD applies to Airbus SAS airplanes specified in paragraphs (c)(1) through (4), certificated in any category, as identified in European Union Aviation Safety Agency (EASA) AD 2026–0142, dated July 20, 2026 (EASA AD 2026–0142). (1) Model A318–112 airplanes. (2) Model A319–115, –132, and –133 airplanes. (3) Model A320–214, –216, –232, –233, –251N, and –271N airplanes. (4) Model A321–211, –213, –231, –271N, –251NX, –253NX, and –271NX airplanes. (d) Subject Air Transport Association (ATA) of America Code 57, Wings. (e) Unsafe Condition This AD was prompted by a quality escape identified in the production assembly line on the main landing gear (MLG) support rib 5 lugs, which resulted in tool mark damage in the bore of the forward and aft lugs. The FAA is issuing this AD to address fatigue damage of the MLG support rib 5, which could result in structural failure and subsequent collapse of the MLG. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Requirements Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, EASA AD 2026–0142. (h) Exceptions to EASA AD 2026–0142 (1) Where EASA AD 2026–0142 refers to its effective date, this AD requires using the effective date of this AD. (2) This AD does not adopt paragraph (2) of EASA AD 2026–0142. (3) Where paragraph (3) of EASA AD 2026– 0142 specifies ‘‘discrepancies, as defined in the AOT, are detected’’, this AD requires replacing that text with ‘‘any discrepancy is detected’’. (4) This AD does not adopt the ‘‘Remarks’’ section of EASA AD 2026–0142. (i) Additional AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): 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 responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (j) of this AD and email to: AMOC@faa.gov . Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, AIR–520, Continued Operational Safety Branch, FAA; or EASA; or Airbus SAS’s EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA- authorized signature. (3) Required for Compliance (RC): Except as required by paragraph (i)(2) of this AD, if any material referenced in EASA AD 2026– 0142 that contains paragraphs that are labeled as RC, the instructions in RC paragraphs, including subparagraphs under an RC paragraph, must be done to comply with this AD; any paragraphs, including subparagraphs under those paragraphs, that are not identified as RC are recommended. The instructions in paragraphs, including subparagraphs under those paragraphs, not identified as RC may be deviated from using accepted methods in accordance with the operator’s maintenance or inspection program without obtaining approval of an AMOC, provided the instructions identified as RC can be done and the airplane can be put back in an airworthy condition. Any substitutions or changes to instructions identified as RC require approval of an AMOC. (j) Additional Information For more information about this AD, contact Andrew Younglove, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206–231–3644; email: Andrew.E.Younglove@faa.gov. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the material listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless this AD specifies otherwise. (i) European Union Aviation Safety Agency (EASA) AD 2026–0142, dated July 20, 2026. (ii) [Reserved] (3) For EASA material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu. You may find this material on the EASA website at ad.easa.europa.eu. (4) You may view this material 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. (5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ ibr-locations or email fr.inspection@nara.gov. Issued on August 27, 2026. Brian Knaup, Acting Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2026–18052 Filed 9–1–26; 4:15 pm] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2026–2724; Project Identifier AD–2025–01606–E; Amendment 39–23451; AD 2026–17–08] RIN 2120–AA64 Airworthiness Directives; Pratt & Whitney Division Engines AGENCY : Federal Aviation Administration (FAA), DOT. ACTION : Final rule. SUMMARY : The FAA is adopting a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) Model PW4074D, PW4077D, PW4084D, PW4090, and PW4090–3 engines. This AD was prompted by the discovery of a quality escape involving incorrect shot peening on certain high-pressure compressor (HPC) drum rotor disk assemblies. This AD requires visually inspecting the HPC drum rotor disk assembly for incorrect shot peen coverage and, depending on the results of the inspection, replacing the HPC drum rotor disk assembly with a part eligible for installation. This AD also requires removing and replacing certain HPC drum rotor disk assemblies before reaching certain life limits. The FAA is issuing this AD to address the unsafe condition on these products. DATES : This AD is effective October 8, 2026. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of October 8, 2026. ADDRESSES : AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2026–2724; 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 final rule, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. VerDate Sep<11>2014 16:06 Sep 02, 2026 Jkt 268001 PO 00000 Frm 00030 Fmt 4700 Sfmt 4700 E:\FR\FM\03SER1.SGM 03SER1 khammond on DSK9W7S144PROD with RULES