# 2026-19360: FAA Orders Airbus Engine Tweaks Before They Fail Mid-Flight

2026-19360, Airworthiness Directives; Airbus SAS Airplanes, is a Federal Register proposed rule from Transportation Department, Federal Aviation Administration published 2026-09-22, effective The FAA must receive comments on this proposed AD by November 6, 2026.; PRIA reads it as touching household money (as of 2026-09-29).

- Canonical: https://policyrisk.com/federal-register/2026-19360
- As of: 2026-09-29
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-19360
- Title: Airworthiness Directives; Airbus SAS Airplanes
- Type: Proposed Rule
- Agencies: Transportation Department; Federal Aviation Administration
- Citation: 91 FR 60033
- Published: 2026-09-22
- Effective: The FAA must receive comments on this proposed AD by November 6, 2026.
- Comments close: 2026-11-06
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: 2120-AA64
- Last updated: 2026-09-29

## In one line

FAA Orders Airbus Engine Tweaks Before They Fail Mid-Flight

## Summary

The FAA wants to make sure certain Airbus A350-941 planes stay safe by requiring early replacement of some engine parts called hydro-mechanical units (HMUs). This is because some engines showed warning messages that mean the parts might fail sooner than expected. Airlines need to act before the new deadlines, and the FAA is asking for feedback by November 6, 2026.

## Abstract

The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus SAS Model A350-941 airplanes. This proposed AD was prompted by reports of engine health monitoring (EHM) messages requiring premature removal of hydro-mechanical units (HMUs). This proposed AD would require replacing certain HMUs before reaching a reduced life limit and would limit the installation of affected parts under certain conditions. The FAA is proposing this AD to address the unsafe condition on these products.

## Effects PRIA read

- Mandatory HMU replacement on A350-941: cost, high. If you operate Airbus Model A350-941 airplanes with Rolls‑Royce Trent XWB-84, Trent XWB-84EP, or Trent XWB-75 engines, the FAA proposes you must replace hydro‑mechanical units (HMUs) having part number G5000HMU02 or G5000HMU03 before they reach a reduced life limit and limits installation of affect…
- Assumed HMU hours trigger immediate replacement: cost, medium. If an operator cannot determine the flight hours on an affected HMU since new or since last overhaul, the AD requires you to assume the HMU has accumulated the specified hours and treat it accordingly: 35,000 flight hours for HMUs on Trent XWB-84 or Trent XWB-75 engines, and 26,500 flight hours for…

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## Sources
- [2026-19360 on federalregister.gov](https://www.federalregister.gov/documents/2026/09/22/2026-19360/airworthiness-directives-airbus-sas-airplanes)
- [2026-19360 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-09-22/pdf/2026-19360.pdf)

## Related
- [Previous: 2026-19355, Airworthiness Directives; Airbus SAS Airplanes](https://policyrisk.com/federal-register/2026-19355)
- [Next: 2026-19361, Periodic Reporting](https://policyrisk.com/federal-register/2026-19361)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-19360 (as of 2026-09-29).