Airworthiness Directive · Amendment 39-23058 · Oxygen
Airbus SAS Airplanes
This AD applies to all Airbus SAS Model A350-941 and -1041 airplanes, certificated in any category.
The FAA is superseding Airworthiness Directive (AD) 2020-03- 14, which applied to all Airbus SAS Model A350-941 and -1041 airplanes. AD 2020-03-14 required an inspection of affected crew oxygen cylinder assemblies for any discrepancy and replacement of discrepant crew oxygen cylinder assemblies with serviceable parts, and allowed installation of affected parts under certain conditions. Since the FAA issued AD 2020-03-14, the supplier introduced an improved crew oxygen cylinder assembly, that will ensure the correct function of the system. This AD continues to require the actions in AD 2020-03-14, requires replacement of all affected parts with redesigned parts, and also prohibits the installation of affected parts. The FAA is issuing this AD to address the unsafe condition on these products.
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) AD 2024-0186, dated September 24, 2024 (EASA AD 2024-0186).
(1) Where EASA AD 2024-0186 refers to its effective date, this AD requires using the effective date of this AD.
(2) Where EASA AD 2024-0186 refers to July 30, 2019 (the effective date of EASA AD 2019-0168), this AD requires using April 2, 2020 (the effective date of AD 2020-03-14).
(3) Where paragraphs (1) and (2) of EASA AD 2024-0186 state “the instructions of the AOT”, this AD requires replacing that text with “paragraph 4.2.2., Inspection Requirements, of the AOT.”
(4) Where paragraph (1) of EASA AD 2024-0186 specifies to “inspect each affected part”, this AD requires replacing that text with “do a one-time inspection of any affected part that is installed on-wing”.
(5) Where paragraph (2) of EASA AD 2024-0186 specifies if “any discrepancy is detected, as defined in the AOT,” this AD requires replacing those words with “any loose part making a sound during agitation of the cylinder is detected”.
(6) This AD does not adopt the “Remarks” section of EASA AD 2024-0186.
Although the material referenced in EASA AD 2024-0186 specifies to submit certain information and send removed parts to the manufacturer, this AD does not include those requirements.
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 EASA; or Airbus SAS's EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature.
(3) Required for Compliance (RC): Except as required by paragraphs (i) and (j)(2) of this AD, if any material referenced in EASA AD 2024-0186 contains paragraphs that are labeled as RC, the instructions in RC paragraphs, including subparagraphs under those paragraphs, must be done to comply with this AD; any paragraphs, including subparagraphs under those paragraphs, that are not identified as RC are recommended. The instructions in paragraphs, including subparagraphs under those paragraphs, not identified as RC may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC, provided the instructions identified as RC can be done and the airplane can be put back in an airworthy condition. Any substitutions or changes to instructions identified as RC require approval of an AMOC.
For more information about this AD, contact Nicole Tsang, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; telephone 206-231-3959; email nicole.s.tsang@faa.gov.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
