# Proposed AD FAA-2026-3873: Airbus SAS Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2026-15-01
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 29, 2026, 91 FR 23034
- Comments due: June 15, 2026
- Became: [AD 2026-15-01](https://openairdocs.org/ad/2026-15-01)
- Docket: FAA-2026-3873 (https://www.regulations.gov/docket/FAA-2026-3873, where comments are filed)
- Project: MCAI-2025-00197-T
- FR document: 2026-08289
- Official PDF: https://openairdocs.org/files/sha256/7c/dd/7cdd00426fdb82149002badfbc70dda82e6e2d75e4ab9201ae61d8bdb857d040 (from https://www.govinfo.gov/content/pkg/FR-2026-04-29/pdf/2026-08289.pdf)
- Federal Register: https://www.federalregister.gov/documents/2026/04/29/2026-08289/airworthiness-directives-airbus-sas-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2026-08289-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2026-3873

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus SAS Model A330-200 and A330-300 series airplanes modified by a certain supplemental type certificate (STC). This proposed AD was prompted by a finding that, for airplanes with a flightcrew oxygen system supplied by a single oxygen cylinder, the oxygen supply would be insufficient under all circumstances for extended operations (ETOPS) with a with a maximum diversion time of 180 minutes (ETOPS-180) with four flightcrew members. This proposed AD would require revising the existing Airplane Flight Manual Supplement (AFM-S) to limit ETOPS-180 operations to three flightcrew members, as applicable, and correct minimum oxygen dispatch pressure information. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Apr 29, 2026: Notice of proposed rulemaking (NPRM). (first notice), FR document 2026-08289, comments due Jun 15, 2026 (https://www.federalregister.gov/documents/2026/04/29/2026-08289/airworthiness-directives-airbus-sas-airplanes)

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