2026-15-14: Engine fuel and control

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) AD 2025-06-01, Amendment 39-22989 (90 FR 12457, March 18, 2025); and b. Adding the following new AD: 2026-15-14 Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.): Amendment 39-23426; Docket No. FAA-2026-1336; Project Identifier MCAI-2025-00254-T. (a) Effective Date This airworthiness directive (AD) is effective September 3, 2026. (b) Affected ADs This AD replaces AD 2025-06-01, Amendment 39-22989 (90 FR 12457, March 18, 2025) (AD 2025-06-01). (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-2025-12, dated March 4, 2025 (Transport Canada AD CF-2025-12). (d) Subject Air Transport Association (ATA) of America Code 73, Engine fuel and control. (e) Unsafe Condition This AD was prompted by a design review that discovered software protection logic for potential large leaks from the engine bleed duct inside the engine core compartments was partially impaired. Under certain large leak conditions ( e.g., a duct burst at a specific portion of the engine's bleed ducting), Pratt & Whitney's PW1500G engine's electronic engine control (EEC) would not transmit the necessary information to the aircraft controller to automatically isolate the opposite engine from the leak path in the bleed system. In addition, since AD 2025-06-01 was issued, the FAA determined the installation of an engine EEC software update must be done to address the unsafe condition. The FAA is issuing this AD to address the unsafe condition which, if not addressed, could result in dual engine failure. (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, Transport Canada AD CF-2025-12. (h) Exceptions to Transport Canada AD CF-2025-12 (1) Where Transport Canada AD CF-2025-12 refers to September 10, 2024 (the effective date of Transport Canada AD CF-2024-30, dated August 27, 2024), this AD requires using April 22, 2025 (the effective date of AD 2025-06-01). (2) Where Transport Canada AD CF-2025-12 refers to its effective date, this AD requires using the effective date of this AD. (3) Where paragraph B. of part I of Transport Canada AD CF-2025-12 specifies to "inform all flight crews of these changes in the AFM procedures and thereafter operate the aeroplane accordingly," this AD does not require those actions as those actions are already required by existing FAA operating regulations (see 14 CFR 91.9, 14 CFR 91.505, and 14 CFR 121.137). (4) Where the material referenced in Transport Canada AD CF-2025-12 specifies to replace or modify the EEC to update the EEC software to version 2.12.1, this AD requires modifying or replacing the EEC to update the EEC software to version 2.12.1 or later approved version. (i) No Reporting Requirement Although the material referenced in Transport Canada AD CF-2025-12 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 . (i) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (ii) AMOCs approved previously for AD 2025-06-01 are approved as AMOCs for the corresponding provisions of Transport Canada AD CF-2025-12 that are required by paragraph (g) of this AD. (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-2025-12, dated March 4, 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 July 23, 2026. Brian Knaup, Acting Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2026-15411 Filed 7-29-26; 8:45 am]BILLING CODE 4910-13-P