Airworthiness Directives; Gulfstream Aerospace LP (Type Certificate Previously Held by Israel Aircraft Industries, Ltd.) Airplanes

Document Text

This section of the FEDERAL REGISTER contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510. The Code of Federal Regulations is sold by the Superintendent of Documents. Rules and Regulations Federal Register 57775 Vol. 91, No. 175 Friday, September 11, 2026 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2026–4654; Project Identifier MCAI–2026–00346–T; Amendment 39–23461; AD 2026–18–06] RIN 2120–AA64 Airworthiness Directives; Gulfstream Aerospace LP (Type Certificate Previously Held by Israel Aircraft Industries, Ltd.) Airplanes AGENCY : Federal Aviation Administration (FAA), DOT. ACTION : Final rule. SUMMARY : The FAA is superseding Airworthiness Directive (AD) 2025–15– 04, which applied to all Gulfstream Aerospace LP Model G150 airplanes. AD 2025–15–04 required revising the existing maintenance or inspection program, as applicable, to incorporate a new airworthiness limitation. Since the FAA issued AD 2025–15–04, the FAA has determined that new or more restrictive airworthiness limitations are necessary. This AD continues to require actions in AD 2025–15–04 and requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA is issuing this AD to address the unsafe condition on these products. DATES : This AD is effective October 16, 2026. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of October 16, 2026. The Director of the Federal Register approved the incorporation by reference of a certain other publication listed in this AD as of September 10, 2025 (90 FR 37786, August 6, 2025). ADDRESSES : AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2026–4654; 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 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. Material Incorporated by Reference: • For Civil Aviation Authority of Israel (CAAI) material identified in this AD, contact CAAI, P.O. Box 1101, Golan Street, Airport City, 70100, Israel; telephone 972–3–9774665; fax 972–3– 9774592; email aip@mot.gov.il. You may find this material on the CAAI website at www.gov.il/en/pages/israeli- airworthiness-directives. • 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–2026–4654. FOR FURTHER INFORMATION CONTACT : Frank Huynh, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 404–983– 5288; email: frank.huynh@faa.gov . SUPPLEMENTARY INFORMATION : Background The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2025–15–04, Amendment 39–23091 (90 FR 37786, August 6, 2025) (AD 2025–15–04). AD 2025–15–04 applied to all Gulfstream Aerospace LP Model G150 airplanes. AD 2025–15–04 required revising the existing maintenance or inspection program, as applicable, to incorporate a new airworthiness limitation. The FAA issued AD 2025–15–04 to address failure of the nose landing gear (NLG) actuator-to-strut attachment pin. The unsafe condition, if not addressed, could result in failure of the NLG to retract and lock after take-off or extend and lock before landing. The NPRM was published in the Federal Register on June 9, 2026 (91 FR 34788). The NPRM was prompted by CAAI AD ISR I–05–2025–10–1, dated October 15, 2025 (CAAI AD ISR I–05– 2025–10–1) (also referred to as the MCAI), issued by CAAI, which is the aviation authority for Israel. The MCAI states that new or more restrictive airworthiness limitations have been developed as specified in Gulfstream 150 Maintenance Manual, Section 05– 10–10, Revision 30, dated September 15, 2025, which includes an inspection reporting procedure. In the NPRM, the FAA proposed to continue to require the actions in AD 2025–15–04 and require revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations, as specified in CAAI AD ISR I–05–2025–10–1. The FAA is issuing this AD to address fatigue damage in principal structural elements of the horizontal stabilizer and elevator systems. The unsafe condition, if not addressed, could result in undetected fatigue cracking in critical empennage structural components, loss of elevator control authority, and reduced structural integrity of the airplane. You may examine the MCAI in the AD docket at regulations.gov under Docket No. FAA–2026–4654. Discussion of Final Airworthiness Directive Comments The FAA received a comment from one individual who supported the NPRM without change. Conclusion 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 reviewed the relevant data, considered any comments received, and determined that air safety requires adopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these products. Except for minor editorial changes, this AD is adopted as proposed in the NPRM. None of the changes will increase the economic burden on any operator. VerDate Sep<11>2014 15:47 Sep 10, 2026 Jkt 268001 PO 00000 Frm 00001 Fmt 4700 Sfmt 4700 E:\FR\FM\11SER1.SGM 11SER1 lotter on DSK8BHNXB4PROD with RULES1

57776 Federal Register / Vol. 91, No. 175 / Friday, September 11, 2026 / Rules and Regulations Material Incorporated by Reference Under 1 CFR Part 51 CAAI AD ISR I–05–2025–10–1 specifies new or more restrictive airworthiness limitations for airplane structures and safe life limits, which include an inspection reporting procedure. This AD also requires CAAI AD ISR I–32–24–10–01R1, which the Director of the Federal Register approved for incorporation by reference as of September 10, 2025 (90 FR 37786, August 6, 2025). 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. Costs of Compliance The FAA estimates that this AD affects 82 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD: The FAA estimates the total cost per operator for the retained actions from AD 2025–15– 04 to be $7,650 (90 work-hours × $85 per work-hour). The FAA has determined that revising the existing maintenance or inspection program takes an average of 90 work- hours per operator, although the agency recognizes that this number may vary from operator to operator. Since operators incorporate maintenance or inspection program changes for their affected fleet(s), the FAA has determined that a per-operator estimate is more accurate than a per-airplane estimate. The FAA estimates the total cost per operator for the new actions to be $7,650 (90 work-hours × $85 per work- hour). 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, (2) Will not affect intrastate aviation in Alaska, and (3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. 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: ■ a. Removing Airworthiness Directive (AD) 2025–15–04, Amendment 39– 23091 (90 FR 37786, August 6, 2025); and ■ b. Adding the following new AD: 2026–18–06 Gulfstream Aerospace LP (Type Certificate Previously Held by Israel Aircraft Industries, Ltd.): Amendment 39–23461; Docket No. FAA–2026–4654; Project Identifier MCAI–2026–00346–T. (a) Effective Date This airworthiness directive (AD) is effective October 16, 2026. (b) Affected ADs This AD replaces AD 2025–15–04, Amendment 39–23091 (90 FR 37786, August 6, 2025) (AD 2025–15–04). (c) Applicability This AD applies to all Gulfstream Aerospace (Type Certificate previously held by Israel Aircraft Industries, Ltd.) LP Model Gulfstream G150 airplanes, certificated in any category. (d) Subject Air Transport Association (ATA) of America Code 05, Time limits/Maintenance checks. (e) Unsafe Condition This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. The FAA is issuing this AD to address fatigue damage in principal structural elements of the horizontal stabilizer and elevator systems, and to prevent failure of the nose landing gear (NLG) actuator to strut attachment pin. The unsafe condition, if not addressed, could result in undetected fatigue cracking in critical empennage structural components, loss of elevator control authority, and reduced structural integrity of the airplane, or the failure of the NLG to properly retract and lock after takeoff or extend and lock before landing. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Retained Revision of the Existing Maintenance or Inspection Program, With a New Terminating Action This paragraph restates the requirements of paragraph (g) of AD 2025–15–04, with a new terminating action. Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Civil Aviation Authority of Israel (CAAI) AD ISR VerDate Sep<11>2014 15:47 Sep 10, 2026 Jkt 268001 PO 00000 Frm 00002 Fmt 4700 Sfmt 4700 E:\FR\FM\11SER1.SGM 11SER1 lotter on DSK8BHNXB4PROD with RULES1

57777 Federal Register / Vol. 91, No. 175 / Friday, September 11, 2026 / Rules and Regulations I–32–24–10–01R1, revised October 15, 2024 (CAAI AD ISR I–32–24–10–01R1). Accomplishing the revision of the existing maintenance or inspection program required by paragraph (j) of this AD terminates the requirements of this paragraph. (h) Retained Exceptions to CAAI AD ISR I 32 24–10–01R1, With No Changes This paragraph restates the exceptions specified in paragraph (h) of AD 2025–15–04, with no changes. (1) Where CAAI AD ISR I–32–24–10–01R1 refers to its effective date, this AD requires using September 10, 2025 (the effective date of AD 2025–15–04). (2) The initial compliance time for doing the task specified in the Action paragraph of CAAI AD ISR I–32–24–10–01R1 is at the applicable ‘‘discard’’ interval as specified in the material referenced in the Action paragraph of CAAI AD ISR I–32–24–10– 01R1, or within 3 months after September 10, 2025 (the effective date of AD 2025–15–04), whichever occurs later. (3) Where the Action paragraph of CAAI AD ISR I–32–24–10–01R1 specifies to ‘‘incorporate AMM Revision 29’’, this AD requires replacing that text with ‘‘revise the existing maintenance or inspection program, as applicable, by incorporating the Nose Landing Gear Actuator to Nose Landing Gear Strut Attachment Pin task identified in AMM Revision 29’’. (i) Retained Provisions for Alternative Actions and Intervals, With a New Exception This paragraph restates the requirements of paragraph (i) of AD 2025–15–04, with a new exception. Except as required by paragraph (j) of this AD, after the existing maintenance or inspection program has been revised as required by paragraph (g) of this AD, no alternative actions ( e.g., inspections) or intervals are allowed unless they are approved as specified in the provisions of paragraph (m)(1) of this AD. (j) New Requirements Except as specified in paragraph (k) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, CAAI AD ISR I–05–2025– 10–1, October 15, 2025 (CAAI AD ISR I–05– 2025–10–1). Accomplishing the revision of the existing maintenance or inspection program required by this paragraph terminates the requirements of paragraph (g) of this AD. (k) Exceptions to CAAI AD ISR I–05–2025– 10–1 (1) Where CAAI AD ISR I–05–2025–10–1 refers to its effective date, this AD requires using the effective date of this AD. (2) Where the Action paragraph of CAAI AD ISR I–05–2025–10–1 specifies to ‘‘incorporate AMM Revision 30’’, this AD requires replacing the text with ‘‘revise the existing maintenance or inspection program, as applicable, to incorporate the information specified in Section 05–10–10 Airworthiness Limitations, Chapter 05 Time Limits/ Maintenance Checks, Gulfstream G150 Maintenance Manual, Revision 30, dated September 15, 2025’’. (3) The initial compliance time for doing the tasks specified in the material referenced in the Action paragraph of CAAI AD ISR I– 05–2025–10–1 is at the applicable initial inspection interval, comply within time, or discard interval specified in the material referenced in the Action paragraph of CAAI AD ISR I–05–2025–10–1, or within 90 days after the effective date of this AD, whichever occurs later. (l) New Provisions for Alternative Actions and Intervals After the existing maintenance or inspection program has been revised as required by paragraph (j) of this AD, no alternative actions ( e.g., inspections) and intervals are allowed unless they are approved as specified in the provisions of the Action paragraph of CAAI AD ISR I–05– 2025–10–1. (m) Additional AD Provisions The following provisions also apply to this AD. (1) Alternative Methods of Compliance (AMOCs): The Manager, International Validation 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 International Validation Branch, send it to the attention of the person identified in paragraph (n) 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, International Validation Branch, FAA; or CAAI; or CAAI’s authorized Designee. If approved by the CAAI Designee, the approval must include the Designee’s authorized signature. (n) Additional Information For more information about this AD, contact Frank Huynh, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 404–983– 5288; email: frank.huynh@faa.gov. (o) 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 the AD specifies otherwise. (3) The following material was approved for IBR on October 16, 2026. (i) Civil Aviation Authority of Israel (CAAI) AD ISR I–05–2025–10–1, dated October 15, 2025. (ii) [Reserved] (4) The following material was approved for IBR on September 10, 2025 (90 FR 37786, August 6, 2025). (i) Civil Aviation Authority of Israel (CAAI) AD ISR I–32–24–10–01R1, revised October 15, 2024. (ii) [Reserved] (5) For CAAI material identified in this AD, contact CAAI, P.O. Box 1101, Golan Street, Airport City, 70100, Israel; telephone 972–3– 9774665; fax 972–3–9774592; email aip@ mot.gov.il. You may find this material on the CAAI website at www.gov.il/en/pages/israeli- airworthiness-directives. (6) 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. (7) 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 31, 2026. Christopher R. Parker, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2026–18600 Filed 9–10–26; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2026–4662; Project Identifier MCAI–2026–00207–T; Amendment 39–23457; AD 2026–18–02] RIN 2120–AA64 Airworthiness Directives; Dassault Aviation Airplanes AGENCY : Federal Aviation Administration (FAA), DOT. ACTION : Final rule. SUMMARY : The FAA is superseding Airworthiness Directive (AD) 2023–22– 12, which applied to all Dassault Aviation Model FALCON 2000 airplanes. AD 2023–22–12 required revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. Since the FAA issued AD 2023–22–12, the FAA has determined that new or more restrictive airworthiness limitations are necessary. This AD continues to require certain actions in AD 2023–22–12 and requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA is issuing this AD to address the unsafe condition on these products. DATES : This AD is effective October 16, 2026. VerDate Sep<11>2014 15:47 Sep 10, 2026 Jkt 268001 PO 00000 Frm 00003 Fmt 4700 Sfmt 4700 E:\FR\FM\11SER1.SGM 11SER1 lotter on DSK8BHNXB4PROD with RULES1