Airworthiness Directive · Amendment 39-10228 · Robinson Helicopter Company Model R22 Helicopters
Robinson Helicopter Company Model R22 Helicopters
Model R22 helicopters, serial number (S/N) 2571 through 2664, certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to Robinson Helicopter Company (Robinson) Model R22 helicopters with a Lycoming 0-360-J2A engine installation. This AD requires replacing the carburetor and carburetor air temperature (CAT) gage with an improved carburetor that does not require manual leaning of the fuel/air mixture during flight, and a remarked CAT gage; and revising the Rotorcraft Flight Manual to remove the reference to leaning the engine. This amendment is prompted by a report from the Civil Aviation Authority of Great Britain that cautioned that the mixture control could inadvertently be placed in the idle cutoff position during in-flight manual leaning of the fuel/air mixture in the carburetor of the Lycoming 0-360-J2A engine. The actions specified by this AD are intended to prevent inadvertent placement of the mixture control to the idle cutoff position during in-flight leaning of the engine, which could result in an engine shutdown and subsequent loss of control of the 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
