FAA Mulls Change to Agusta A109E Tail Rotor Life Limit AD
The FAA is proposing to supersede an existing airworthiness directive for the Agusta A109E that requires reducing the tail rotor (T/R) blade life limit, modifying a T/R hub and grip assembly, re-identifying two T/R assemblies, clarifying the never-exceed speed (Vne) limitation and reducing the inspection interval. The OEM has since redesigned a T/R grip bushing that reduces the loads, which caused cracking on the T/R blades. This requires installing the new bushing and re-identifying the T/R hub-and-grip and hub-and-blade assemblies and requires a recurring inspection of each bushing. The proposed actions are intended to prevent fatigue failure of a T/R blade and subsequent loss of control of the helicopter.