Airworthiness Directive · Amendment 39-17588 · Fuel selector/shut-off valve
Robinson Helicopter Company (Robinson)
This AD applies to Model R22, R22 Alpha, R22 Beta, and R22 Mariner helicopters, serial number 0002 through 4271, with a fuel shut-off valve part-number (P/N) A670-1 revision A through H installed, certificated in any category.
We are adopting a new airworthiness directive (AD) for Robinson Model R22, R22 Alpha, R22 Beta, and R22 Mariner helicopters with certain fuel shut-off valves installed. This AD requires replacing the fuel shut-off valve with a newer design fuel shut-off valve. This AD is prompted by three accidents that occurred because the fuel shut- off valve was inadvertently moved to the "off" position. These actions are intended to prevent inadvertent closing of the fuel valve, which could result in engine power loss from which a safe landing may not be possible.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
(1) Within 3 years, remove the fuel shut-off valve and replace with an airworthy fuel shut-off valve that has a P/N other than a P/N listed in paragraph (a) this AD.
(2) Do not install a fuel shut-off valve, P/N A670-1 revision A through H, 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
