2026-10-12: Fuel

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by: a. Removing Airworthiness Directive (AD) 2024-04-06, Amendment 39-22685 (89 FR 19228, March 18, 2024); and b. Adding the following new AD: 2026-10-12 Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.): Amendment 39-23352; Docket No. FAA-2025-5024; Project Identifier MCAI-2025-00797-T. (a) Effective Date This airworthiness directive (AD) is effective July 1, 2026. (b) Affected ADs This AD replaces AD 2024-04-06, Amendment 39-22685 (89 FR 19228, March 18, 2024) (AD 2024-04-06). (c) Applicability This AD applies to Airbus Canada Limited Partnership (Type Certificate previously held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Model BD-500-1A10 and BD-500-1A11 airplanes, certificated in any category, as identified in Transport Canada AD CF-2025-24, dated April 29, 2025 (Transport Canada AD CF-2025-24). (d) Subject Air Transport Association (ATA) of America Code 28, Fuel. (e) Unsafe Condition This AD was prompted by reports of mechanical wear damage on the motive flow fuel-feed tubes that were secured by bonding clamps and clamp blocks inside the collector tank. This AD was also prompted by a determination that replacement of the saddle clamps of the motive flow tubes is also needed to address the unsafe condition. The FAA is issuing this AD to address mechanical wear damage on the motive flow fuel-feed tubes. The unsafe condition, if not addressed, could result in failure of the affected motive flow fuel-feed tubes and a subsequent failure of the gravity transfer system, which could lead to a fuel imbalance condition resulting in a reduction in airplane functional capabilities and increased crew workload. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Requirements Except as specified in paragraphs (h) and (i) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Transport Canada AD CF-2025-24. (h) Exception to Transport Canada AD CF-2025-24 (1) Where Transport Canada AD CF-2025-24 refers to its effective date, this AD requires using the effective date of this AD. (2) Where Transport Canada AD CF-2025-24 refers to January 4, 2023 (the effective date of Transport Canada AD CF-2022-70), this AD requires using April 22, 2024 (the effective date of AD 2024-04-06). (3) Where Transport Canada AD CF-2025-24 refers to hours air time, this AD requires using flight hours. (4) Where Parts II and III of Transport Canada AD CF-2025-24 specify to "rectify, as applicable", this AD requires replacing that text with "accomplish all applicable corrective actions before further flight". (5) Where the service information referenced in Parts II and III of Transport Canada AD CF-2025-24 specifies to do rework if there is no damage or paint damage only, operators may either do the rework or replace the fuel tubes as specified in the service information referenced in Parts II and III of Transport Canada AD CF-2025-24. (6) Where Part III of Transport Canada AD CF-2025-24 specifies inspecting for "a damage", this AD requires replacing that text with "damage (damage includes, but is not limited to, cracks, scores, scratches, nicks, and gouges)". (i) No Reporting Requirement Although the service information referenced in Transport Canada AD CF- 2025-24 specifies to submit certain information to the manufacturer, this AD does not include that requirement. (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 Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (k) 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 Transport Canada; or Airbus Canada Limited Partnership's Transport Canada Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. (k) Additional Information For more information about this AD, contact Erica Bayles, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 907-271-5844; email: erica.e.bayles@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 this AD specifies otherwise. (i) Transport Canada AD CF-2025-24, dated April 29, 2025. (ii) [Reserved] (3) For Transport Canada material identified in this AD, contact Transport Canada, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; telephone 888-663-3639; email TC.AirworthinessDirectives-Consignesdenavigabilite.TC@tc.gc.ca. You may find this material on the Transport Canada website at tc.canada.ca/en/aviation. (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 May 11, 2026. Brian Knaup, Acting Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2026-10491 Filed 5-26-26; 8:45 am]BILLING CODE 4910-13-P