# 2025-20924: FAA Forces Airlines to Replace Faulty Airbus Hydraulic Parts

2025-20924, Airworthiness Directives; Airbus SAS Airplanes, is a Federal Register rule from Transportation Department, Federal Aviation Administration published 2025-11-25, effective 2025-12-10 (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2025-20924
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-20924
- Title: Airworthiness Directives; Airbus SAS Airplanes
- Type: Rule
- Agencies: Transportation Department; Federal Aviation Administration
- Citation: 90 FR 53203
- Published: 2025-11-25
- Effective: 2025-12-10
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: 2120-AA64
- Last updated: 2026-06-11

## In one line

FAA Forces Airlines to Replace Faulty Airbus Hydraulic Parts

## Summary

If you fly or work with certain Airbus A350-1041 planes, listen up! The FAA is updating rules to replace old hydro-mechanical units (HMUs) with improved ones to keep flights safe. These changes kick in December 10, 2025, and could mean some maintenance costs but way better safety for everyone on board.

## Abstract

The FAA is superseding Airworthiness Directive (AD) 2022-22- 09, which applied to certain Airbus SAS Model A350-1041 airplanes. AD 2022-22-09 required replacing affected hydro-mechanical units (HMUs) with serviceable HMUs before reaching a reduced life limit and limited the installation of affected parts under certain conditions. Since the FAA issued AD 2022-22-09, an improved HMU was developed and embodied in production. This AD continues to require the actions in AD 2022-22-09. This AD also requires replacing affected HMUs with improved HMUs and prohibits the installation of affected parts under certain conditions and on certain airplanes. The FAA is issuing this AD to address the unsafe condition on these products.

## Effects PRIA read

- A350 HMU Replacement Required: mixed, medium. If you own or operate Airbus A350-1041 airplanes with Rolls-Royce Trent XWB-97 engines, this rule requires replacing hydro-mechanical units (HMUs) having part number G5020HMU02 with improved HMUs having part number G5020HMU03 (or later approved P/Ns). The AD also prohibits re-installing affected HM…
- Estimated Labor Costs for Compliance: cost, medium. The FAA estimates labor to comply if an affected airplane is put on the U.S. register: retained actions may require up to 7 work-hours at $85/hour (up to $595) and the new actions up to 2 work-hours at $85/hour (up to $170). The FAA states it has no definitive data for parts costs. Currently, there…

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## Sources
- [2025-20924 on federalregister.gov](https://www.federalregister.gov/documents/2025/11/25/2025-20924/airworthiness-directives-airbus-sas-airplanes)
- [2025-20924 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-11-25/pdf/2025-20924.pdf)

## Related
- [Previous: 2025-20921, Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate P…](https://policyrisk.com/federal-register/2025-20921)
- [Next: 2025-20925, Airworthiness Directives; Airbus SAS Airplanes](https://policyrisk.com/federal-register/2025-20925)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2025-20924 (as of 2026-06-11).