Flight Controls - Governor Controller - Replacement
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Robinson Helicopter models must remove and replace governor controllers P/N D270-1, Revisions A through E, with Revision F or later within 90 days of November 29, 2024. Installation of the earlier revisions is prohibited from the effective date. Replacement procedures must follow the specified service bulletins and be performed by authorized personnel as required by FAA regulations.
Summary
The Federal Aviation Administration's Airworthiness Directive 2024-20-03 addresses Robinson Helicopter Company Model R22 Beta, R22 Mariner, R44, and R44 II helicopters equipped with governor controller part number D270-1, Revisions A through E. This directive mandates the replacement of these governor controllers due to engine governor failures caused by water intrusion. The AD aims to enhance flight safety by preventing loss of engine speed governing during critical flight phases.
What changed
This new airworthiness directive requires removal and replacement of governor controllers P/N D270-1, Revisions A through E, with Revision F or later versions that provide improved moisture protection. It also prohibits installation of the earlier revisions on any helicopter. The AD incorporates compliance procedures from Robinson Helicopter Service Bulletins SB-121 and SB-114 and mandates that certain replacement steps be performed by authorized personnel under 14 CFR 43.3.
Why it matters
This AD is critical for aviation professionals because it addresses a safety risk involving engine governor failure due to water intrusion, which can lead to engine overspeed or underspeed and unexpected power loss. Operators and maintenance organizations must ensure compliance to avoid in-flight power loss, especially during critical phases such as landing. Compliance ensures continued airworthiness and regulatory adherence for affected Robinson Helicopter models.
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Get the next one by email
New ADs and bulletins for Robinson R22 and R44 (Raven), summarized like this page, every Monday.