Airworthiness Directive · Amendment 39-23488 · Pneumatic
Airbus SAS Airplanes
The FAA has filed this AD for publication in the Federal Register on October 19, 2026. This page shows the public-inspection copy and is replaced by the published text when it appears. Its effective date is set at publication.
This AD applies to all Airbus SAS Model A330-841 and -941 airplanes, certificated in any category.
The FAA is superseding Airworthiness Directive (AD) 2025-04-05, which applied to all Airbus SAS Model A330-841 and -941 airplanes. AD 2025-04-05 required a revision of the existing airplane flight manual (AFM) and removal of the previously required limitations; a revision of the existing minimum equipment list (MEL); one-time or repetitive seal integrity tests of each engine bleed air system (EBAS) high pressure valve (HPV); additional maintenance instructions and corrective actions; and repetitive replacement of affected HPV clips; as applicable. AD 2025-04-05 also limited the installation of affected HPV clips. Since the FAA issued AD 2025-04-05, an improved EBAS HPV with unaffected HPV clips was certified, and it was determined that the bleed monitoring computer (BMC) software (SW) must be updated. This AD continues to require the actions in AD 2025-04-05, except for repetitive replacement of affected HPV clips. This AD also requires updating the BMC SW, additional work, and an additional revision of the existing MEL for the engine bleed overpressure valve; as applicable. This AD also prohibits the installation of certain BMC software. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraphs (h), (i), and (j) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2025-0104R1, dated March 19, 2026 (EASA AD 2025-0104R1).
(1) Where EASA AD 2025-0104R1 refers to May 21, 2025 (the effective date of the original issue of EASA AD 2025-0104, dated May 7, 2025), this AD requires using the effective date of this AD.
(2) Where EASA AD 2025-0104R1 refers to May 28, 2024 (the effective date of EASA AD 2023-0111R1, dated May 28, 2024), this AD requires using April 4, 2025 (the effective date of AD 2025-04-05).
(3) Where EASA AD 2025-0104R1 refers to June 2, 2023 (the effective date of the original issue of EASA AD 2023-0111, dated May 26, 2023), this AD requires using April 4, 2025 (the effective date of AD 2025-04-05).
(4) Where paragraph (19) of EASA AD 2025-0104R1 refers to December 8, 2022 (the effective date of EASA AD 2022-0227, dated November 24, 2022), this AD requires using April 4, 2025 (the effective date of AD 2025-04-05).
(5) Where paragraph (21) of EASA AD 2025-0104R1 refers to December 8, 2022 (the effective date of EASA AD 2022-0227, dated November 24, 2022), this AD requires using July 18, 2023 (the effective date of AD 2023-11-08, Amendment 39-22454 (88 FR 38384, June 13, 2023)).
(6) Where EASA AD 2025-0104R1 refers to September 5, 2022 (the effective date of EASA AD 2022-0181, dated August 29, 2022), this AD requires using September 15, 2022 (the effective date of AD 2022-19-05, Amendment 39-22174 (87 FR 54870, September 8, 2022)).
(7) Where EASA AD 2025-0104R1 defines a Serviceable HPV, in part, as “EBAS HPV, eligible for installation in accordance with Airbus instructions”, this AD requires replacing that text with “EBAS HPV eligible for installation”.
(8) Where paragraphs (1), (2), (3), (7), and (29) of EASA AD 2025-0104R1 specify to inform all flightcrews of airplane flight manual (AFM) revisions and dispatch limitations, and thereafter operate the airplane accordingly, this AD does not require those actions, as those actions are already required by existing FAA operating regulations (see 14 CFR 91.9, 91.505, and 121.137 for AFM requirements and 14 CFR 121.628(a)(2) and (5) for minimum equipment list requirements).
(9) Where paragraph (20) of EASA AD 2025-0104R1 specifies “as required by paragraph (17) of the original issue of this AD”, this AD requires replacing that text with “as required by AD 2025-04-05 as specified in paragraph (17) of EASA AD 2023-0111R1”.
(10) Where paragraph (30) of EASA AD 2025-0104R1 specifies “Modification of both EBAS HPV”, this AD requires replacing that text with “Modification or replacement of both affected HPVs”.
(11) This AD does not adopt the “Remarks” section of EASA AD 2025-0104R1.
