Owner/operators of Bell 206L series helicopters can install a new cylinder extension assembly from Tactair Fluid Controls, a subsidiary of Young & Franklin. The new cylinder extension assembly is detailed in a Tactair service bulletin (SB42C42642-67-04) and a Bell Helicopter information letter (206L-14-97), and its replacement is recommended for accomplishment during repair or overhaul of the hydraulic servo actuator. The improvement replaces the existing cylinder extension assembly with an upgraded component that is designed to increase the reliability and service life of the entire hydraulic servo actuator.