# 2025-24233: FAA Targets Overheating Pumps in Dornier 228 Airplanes

2025-24233, Airworthiness Directives; General Atomics AeroTec Systems GmbH (Type Certificate Previously Held by RUAG Aerospace Services GmbH) Airplanes, is a Federal Register proposed rule from Transportation Department, Federal Aviation Administration published 2026-01-05, effective 2026-01-05 (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2025-24233
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-24233
- Title: Airworthiness Directives; General Atomics AeroTec Systems GmbH (Type Certificate Previously Held by RUAG Aerospace Services GmbH) Airplanes
- Type: Proposed Rule
- Agencies: Transportation Department; Federal Aviation Administration
- Citation: 91 FR 205
- Published: 2026-01-05
- Effective: 2026-01-05
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: 2120-AA64
- Last updated: 2026-06-11

## In one line

FAA Targets Overheating Pumps in Dornier 228 Airplanes

## Summary

The FAA wants all owners of General Atomics Dornier 228 airplanes to swap out certain hydraulic pump motors that can overheat and get damaged. They’re proposing a safer, improved motor and banning the old ones from being installed again. Comments on this plan are open until February 19, 2026, so owners should get ready to act soon and keep their planes safe.

## Abstract

The FAA proposes to adopt a new airworthiness directive (AD) for all General Atomics AeroTec Systems GmbH (General Atomics) Model Dornier 228-100, Dornier 228-101, Dornier 228-200, Dornier 228-201, Dornier 228-202, and Dornier 228-212 airplanes. This proposed AD was prompted by reports of specific part-numbered hydraulic pump motors becoming severely damaged by excessive heat. This proposed AD would require replacing the affected hydraulic pump motor with an improved design hydraulic pump motor. This proposed AD would also prohibit installing an affected hydraulic pump motor on any airplane. The FAA is proposing this AD to address the unsafe condition on these products.

## Effects PRIA read

- Mandatory pump-motor swap and ban: cost, high. If you own or operate a General Atomics Dornier 228 (models Dornier 228-100, -101, -200, -201, -202, or -212), you must replace any hydraulic pump motor with part number (P/N) 1259A with the improved motor P/N A-752511A00B. Do the replacement within 200 hours time-in-service of the hydraulic pump m…
- Estimated compliance cost to operators: cost, high. The FAA estimates this AD affects 16 U.S.-registered Dornier 228 airplanes. Estimated labor is 3 work-hours at $85 per hour ($255), parts $8,900, for a total cost per airplane of $9,155 and an estimated total cost to U.S. operators of $146,480.

## Related documents

- [2026-15585](https://policyrisk.com/federal-register/2026-15585): Requirements for Interference-Tolerant Radio Altimeter Systems, 2026-07-31
- [2026-13440](https://policyrisk.com/federal-register/2026-13440): Enabling Supersonic Overland Flight, 2026-07-02
- [2026-13126](https://policyrisk.com/federal-register/2026-13126): Designation-Restrict the Operation of Unmanned Aircraft in Close Proximity to a Fixed Site Facility; Extension of Comment Period, 2026-06-30
- [2026-08943](https://policyrisk.com/federal-register/2026-08943): Designation-Restrict the Operation of Unmanned Aircraft in Close Proximity to a Fixed Site Facility, 2026-05-06
- [2025-04846](https://policyrisk.com/federal-register/2025-04846): Extension of the Prohibition Against Certain Flights in the Territory and Airspace of Libya, 2025-03-20
- [2025-03853](https://policyrisk.com/federal-register/2025-03853): Enforcement Policy Regarding “Drug and Alcohol Testing of Certificated Repair Station Employees Located Outside of the United States; Corre…, 2025-03-11

## Sources
- [2025-24233 on federalregister.gov](https://www.federalregister.gov/documents/2026/01/05/2025-24233/airworthiness-directives-general-atomics-aerotec-systems-gmbh-type-certificate-previously-held-by)
- [2025-24233 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-01-05/pdf/2025-24233.pdf)

## Related
- [Previous: 2025-24210, Analog Telecommunications Relay Service Modernization](https://policyrisk.com/federal-register/2025-24210)
- [Next: 2025-24264, Atlantic Highly Migratory Species; Revisions to Commercial Atlantic Blacknose a…](https://policyrisk.com/federal-register/2025-24264)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2025-24233 (as of 2026-06-11).