Summary
We propose to adopt a superseding airworthiness directive (AD) for the specified Agusta S.p.A. (Agusta) model helicopters. This proposed AD results from a revised mandatory continuing airworthiness information (MCAI) originated by an aviation authority to identify and correct an unsafe condition on an aviation product. The aviation authority of Italy, with which we have a bilateral agreement, reports that the previous MCAI should not apply to newly redesigned and improved tail rotor blades. This action proposes the same inspection requirements as the current AD but would limit the applicability to only three part-numbered tail rotor blades. The proposed AD would require actions that are intended to prevent fatigue failure of a tail rotor blade (blade), loss of a tail rotor, and subsequent loss of control of the helicopter.