Airworthiness Directive · Amendment 39-22862 · Flight control system
Robinson Helicopter Company Helicopters
This AD applies to all Robinson Helicopter Company Model R22 Beta, R22 Mariner, R44, and R44 II helicopters, certificated in any category, with a governor controller part number (P/N) D270-1, Revision A through E inclusive, installed.
The FAA is adopting a new airworthiness directive (AD) for Robinson Helicopter Company (Robinson Helicopter) Model R22 Beta, R22 Mariner, R44, and R44 II helicopters with a certain governor controller installed. This AD was prompted by reports of engine governor failure, which was a result of water intrusion inside of the governor controller. This AD requires replacing certain governor controllers and prohibits installing those governor controllers on any helicopter. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Within 90 days after the effective date of this AD, remove the governor controller from service and install a governor controller P/N D270-1, Revision F or later approved revision by following the Compliance Procedure, paragraphs 2. though 5., of Robinson Helicopter Company R22 Service Bulletin SB-121 or R44 Service Bulletin SB-114, each dated June 28, 2023 (SB-121 or SB-114), as applicable to your helicopter model, except the procedures in paragraph 4. of SB-121 and SB-114 must be accomplished by persons authorized under 14 CFR 43.3.
(2) As of the effective date of this AD, do not install any governor controller P/N D270-1, Revision A through E inclusive, on any helicopter.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
