AD 2026-18-52

59048 Federal Register / Vol. 91, No. 180 / Friday, September 18, 2026 / Rules and Regulations DEPARTMENT OF ENERGY 10 CFR Part 460 [EERE–2009–BT–BC–0021] RIN 1904–AC11 Energy Conservation Program: Energy Conservation Standards for Manufactured Housing AGENCY : Office of Critical Minerals and Energy Innovation (formerly Energy Efficiency and Renewable Energy), Department of Energy. ACTION : Notification of legal effect. SUMMARY : In this notification, the U.S. Department of Energy (‘‘DOE’’ or ‘‘the Department’’) is providing notice that the Department’s Energy Conservation Standards for Manufactured Housing final rule published in the Federal Register on May 31, 2022, has no legal effect in light of the enactment of the 21st Century ROAD to Housing Act (‘‘ROAD Act’’). DATES : The information contained in this notification will be applicable on September 18, 2026 and will remain in effect until further notice. FOR FURTHER INFORMATION CONTACT : Mr. Jeremy Williams, U.S. Department of Energy, Office of Critical Minerals and Energy Innovation, Building Technologies Office, CM–5B, 1000 Independence Avenue SW, Washington, DC 20585–0121. Email: BuildingEnergyCodes@doe.gov. Mr. Pete Cochran, U.S. Department of Energy, Office of the General Counsel, GC–33, 1000 Independence Avenue SW, Washington, DC 20585–0121. Telephone: (202) 586–4798. Email: Peter.Cochran@hq.doe.gov. SUPPLEMENTARY INFORMATION : On May 31, 2022, DOE published in the Federal Register a final rule to establish energy conservation standards for manufactured housing pursuant to the Energy Independence and Security Act of 2007. 87 FR 32728. On July 11, 2026, the 21st Century ROAD to Housing Act (Pub. L. 119–101) (‘‘ROAD Act’’) was enacted. Section 301(d)(2)(B) of the ROAD Act specifies that ‘‘[n]o energy efficiency standards for manufactured homes developed by any Federal agency shall have legal effect unless and until adopted by the Department of Housing and Urban Development pursuant to the consensus standards and regulatory development process described in . . . 42 U.S.C. 5403(a)(2)).’’ Section 301(d)(2)(C) of the ROAD Act requires the Department of Housing and Urban Development (‘‘HUD’’) to ‘‘adopt minimum energy efficiency standards for manufactured homes’’ within one year of enactment, and to update those standards every three years. As of the date of this notification, no minimum energy efficiency standards meeting the requirements under section 301(d) of the ROAD Act have been adopted by HUD. Therefore, it is DOE’s position that the final rule published in the Federal Register on May 31, 2022, establishing energy conservation standards for manufactured housing has no legal effect pursuant to section 301(d)(2)(B) of the ROAD Act. The Department intends to initiate a rulemaking to conform DOE’s regulations for manufactured housing to account for the statutory changes adopted by the ROAD Act, and further notes that DOE will not enforce its energy conservation standards for manufactured housing as they have no legal effect under the ROAD Act. Signing Authority This document of the Department of Energy was signed on September 16, 2026, by Audrey Robertson, Assistant Secretary (EERE) for Critical Minerals and Energy Innovation, pursuant to delegated authority from the Secretary of Energy. That document with the original signature and date is maintained by DOE. For administrative purposes only, and in compliance with requirements of the Office of the Federal Register, the undersigned DOE Federal Register Liaison Officer has been authorized to sign and submit the document in electronic format for publication, as an official document of the Department of Energy. This administrative process in no way alters the legal effect of this document upon publication in the Federal Register . Signed in Washington, DC, on September 16, 2026. Jennifer Hartzell, Alternate Federal Register Liaison Officer, U.S. Department of Energy. [FR Doc. 2026–19154 Filed 9–17–26; 8:45 am] BILLING CODE 6450–01–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2026–8815; Project Identifier MCAI–2026–00951–E; Amendment 39–23468; AD 2026–18–52] RIN 2120–AA64 Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co. KG Engines AGENCY : Federal Aviation Administration (FAA), DOT. ACTION : Final rule; request for comments. SUMMARY : The FAA is adopting a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd. & Co. KG (RRD) Model RB211–Trent 875–17, 877– 17, 884–17, 884B–17, 892–17, 892B–17, and 895–17 engines. The FAA previously sent this AD as an emergency AD to all known U.S. owners and operators of these engines. This AD was prompted by reports of non- conformances leading to low oil pressure events on low life oil pumps. This AD requires de-pairing of engines on airplanes with two affected engines installed to ensure no more than one affected oil pump is installed on twin- engine airplanes. The FAA is issuing this AD to address the unsafe condition on these products. DATES : This AD is effective September 21, 2026. Emergency AD 2026–18–52, issued on September 5, 2026, which contains the requirements of this amendment, was effective with actual notice. The Director of the Federal Register approved the incorporation by reference of a certain publication identified in this AD as of September 21, 2026. The FAA must receive comments on this AD by November 2, 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–2026–8815; 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; phone: +49 221 8999 000; email: ADs@easa.europa.eu . You VerDate Sep<11>2014 16:31 Sep 17, 2026 Jkt 268001 PO 00000 Frm 00002 Fmt 4700 Sfmt 4700 E:\FR\FM\18SER1.SGM 18SER1 khammond on DSK9W7S144PROD with RULES

59049 Federal Register / Vol. 91, No. 180 / Friday, September 18, 2026 / Rules and Regulations 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, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (817) 222– 5110. It is also available at regulations.gov under Docket No. FAA– 2026–8815. FOR FURTHER INFORMATION CONTACT : Alexis Whitaker, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (516) 228–7309; email: alexis.j.whitaker@ 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–2026–8815; Project Identifier MCAI–2026–00951–E’’ 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 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 Alexis Whitaker, 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 issued Emergency AD 2026– 18–52, dated September 5, 2026 (the emergency AD), to address an unsafe condition on all RRD Model RB211– Trent 875–17, 877–17, 884–17, 884B– 17, 892–17, 892B–17, and 895–17 engines. The FAA sent the emergency AD to all known U.S. owners and operators of these engines. The emergency AD requires de-pairing of engines on airplanes with two affected engines installed to ensure no more than one affected oil pump is installed on twin-engine airplanes. The emergency AD was prompted by EASA Emergency AD 2026–0173–E, dated September 4, 2026 (EASA Emergency AD 2026–0173–E) (also referred to as the MCAI), issued by EASA, which is the Technical Agent for the Member States of the European Union, to correct an unsafe condition on all RRD Model RB211-Trent 875–17, 877–17, 884–17, 884B–17, 892–17, 892B–17, and 895–17 engines. The MCAI states that occurrences have been reported of non-conformances leading to low oil pressure events on low life oil pumps. Subsequent investigation identified a potential failure mode affecting the oil pump input coupling shear neck. This condition, if not addressed, could lead to a dual in-flight shutdown on airplanes equipped with two affected engines, resulting in reduced control of the airplane. 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–2026–8815. Material Incorporated by Reference Under 1 CFR Part 51 The FAA reviewed EASA Emergency AD 2026–0173–E. This material specifies procedures for de-pairing of engines on airplanes with two affected engines installed to ensure no more than one affected oil pump is installed on twin-engine airplanes. 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 (CAA) 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 Emergency AD 2026–0173–E, described previously, except for any differences identified as exceptions in the regulatory text of this AD. Interim Action The FAA considers that this AD is an interim action. If final action is later identified, the FAA might consider additional rulemaking. 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 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 Emergency AD 2026–0173–E is incorporated by reference in this AD. This AD requires compliance with EASA Emergency AD 2026–0173–E in its entirety through that incorporation, except for any differences identified as exceptions in the regulatory text of this AD. Material required by EASA Emergency AD 2026–0173–E for compliance will be available at regulations.gov under Docket No. FAA– 2026–8815 after this AD is published. 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. An unsafe condition exists that required the immediate adoption of Emergency AD 2026–18–52, issued on VerDate Sep<11>2014 16:31 Sep 17, 2026 Jkt 268001 PO 00000 Frm 00003 Fmt 4700 Sfmt 4700 E:\FR\FM\18SER1.SGM 18SER1 khammond on DSK9W7S144PROD with RULES

59050 Federal Register / Vol. 91, No. 180 / Friday, September 18, 2026 / Rules and Regulations September 5, 2026, to all known U.S. owners and operators of these engines. The FAA found that the risk to the flying public justified forgoing notice and comment prior to adoption of this rule because the oil pump can fail prematurely due to cracking of the internal rotor. This condition could lead to a dual in-flight shutdown on airplanes equipped with two affected engines, resulting in reduced control of the airplane. These conditions still exist; therefore, 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 forego 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 prior notice and comment, RFA analysis is not required. Costs of Compliance The FAA estimates that this AD affects 154 engines installed on airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD: E STIMATED C OSTS Action Labor cost Parts cost Cost per product Cost on U.S. operators Records check ................................................ 1 work-hour × $85 per hour = $85 ................. $0 $85 $13,090 The FAA estimates the following costs to do any necessary repair or replacement that would be required based on the results of the records check. The agency has no way of determining the number of engines that might need this repair or replacement: O N -C ONDITION C OSTS Action Labor cost Parts cost Cost per product Repair or replace oil pump ....................................... Up to 16 work-hours × $85 per hour = $1,360 ........ Up to $237,070 Up to $238,430. 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: 2026–18–52 Rolls-Royce Deutschland Ltd. & Co. KG: Amendment 39–23468; Docket No. FAA–2026–8815; Project Identifier MCAI–2026–00951–E. (a) Effective Date The FAA issued Emergency Airworthiness Directive (AD) 2026–18–52 on September 5, 2026 (also referred to as the emergency AD), directly to affected owners and operators. As a result of such actual notice, the emergency AD was effective for those owners and operators on the date it was received. This AD contains the same requirements as the emergency AD and, for those who did not receive actual notice, is effective on September 21, 2026. (b) Affected ADs None. (c) Applicability This AD applies to all Rolls-Royce Deutschland Ltd. & Co. KG Model RB211- Trent 875–17, 877–17, 884–17, 884B–17, 892–17, 892B–17, and 895–17 engines. (d) Subject Joint Aircraft System Component (JASC) Code 7261, Turbine Engine Oil System. (e) Unsafe Condition This AD was prompted by reports of non- conformances leading to low oil pressure events on low life oil pumps due to a failure mode affecting the oil pump input coupling shear neck. The FAA is issuing this AD to address a failure mode affecting the oil pump input coupling shear neck. The unsafe condition, if not addressed, could lead to a dual in-flight shutdown on airplanes equipped with two affected engines, resulting in reduced control of the airplane. VerDate Sep<11>2014 16:31 Sep 17, 2026 Jkt 268001 PO 00000 Frm 00004 Fmt 4700 Sfmt 4700 E:\FR\FM\18SER1.SGM 18SER1 khammond on DSK9W7S144PROD with RULES

59051 Federal Register / Vol. 91, No. 180 / Friday, September 18, 2026 / Rules and Regulations (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) Emergency AD 2026– 0173–E, dated September 4, 2026 (EASA Emergency AD 2026–0173–E). (h) Exceptions to EASA Emergency AD 2026– 0173–E (1) Where EASA Emergency AD 2026– 0173–E refers to its effective date, this AD requires using the effective date of this AD. (2) This AD does not adopt the ‘‘Remarks’’ section of EASA Emergency AD 2026–0173– E. (i) Special Flight Permits Special flight permits, as described in 14 CFR 21.197 and 21.199, are not allowed. (j) 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 AIR–520, Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (k) of this AD or 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 Rolls-Royce Deutschland Ltd. & Co. KG’s EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature. (k) Additional Information For more information about this AD, contact Alexis Whitaker, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (516) 228–7309; email: alexis.j.whitaker@faa.gov . (l) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference 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 the AD specifies otherwise. (i) European Union Aviation Safety Agency (EASA) Emergency AD 2026–0173–E, dated September 4, 2026. (ii) [Reserved] (3) For EASA material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; phone: +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 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 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 September 15, 2026. Brian Knaup, Acting Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2026–19171 Filed 9–16–26; 4:15 pm] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2026–8814; Project Identifier MCAI–2026–00950–E; Amendment 39–23467; AD 2026–18–51] RIN 2120–AA64 Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co. KG Engines AGENCY : Federal Aviation Administration (FAA), DOT. ACTION : Final rule; request for comments. SUMMARY : The FAA is adopting a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd. & Co. KG (RRD) Model RB211 Trent 768–60, 772– 60, and 772B–60 engines. The FAA previously sent this AD as an emergency AD to all known U.S. owners and operators of these engines. This AD was prompted by reports of non- conformances leading to low oil pressure events on low life oil pumps. This AD requires de-pairing of engines on airplanes with two affected engines installed to ensure no more than one affected oil pump is installed on twin- engine airplanes. The FAA is issuing this AD to address the unsafe condition on these products. DATES : This AD is effective September 21, 2026. Emergency AD 2026–18–51, issued on September 5, 2026, which contains the requirements of this amendment, was effective with actual notice. The Director of the Federal Register approved the incorporation by reference of a certain publication identified in this AD as of September 21, 2026. The FAA must receive comments on this AD by November 2, 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–2026–8814; 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; phone: +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, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (817) 222– 5110. It is also available at regulations.gov under Docket No. FAA– 2026–8814. FOR FURTHER INFORMATION CONTACT : Alexis Whitaker, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (516) 228–7309; email: alexis.j.whitaker@ 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–2026–8814; Project Identifier MCAI–2026–00950–E’’ at the beginning VerDate Sep<11>2014 16:31 Sep 17, 2026 Jkt 268001 PO 00000 Frm 00005 Fmt 4700 Sfmt 4700 E:\FR\FM\18SER1.SGM 18SER1 khammond on DSK9W7S144PROD with RULES