Summary
We propose to adopt a new airworthiness directive (AD) for Agusta Model A109C, A109E, A109K2, and A119 helicopters. This proposed AD would require recurring visual inspections of the tail rotor (T/R) blade retaining bolts (bolts) for a crack, corrosion, damage, or missing cadmium plating in the central part of the bolt. If a crack is not detected by the initial visual inspection then this proposed AD would require a liquid penetrant inspection. Replacing a cracked or damaged bolt would be required before further flight. This proposed AD is prompted by two reported incidents of cracked bolts. The proposed actions are intended to detect an unairworthy bolt and prevent failure of a bolt, release of a T/R blade, and subsequent loss of control of the helicopter.