BN Business News
Add your company to Business Communicator →

Transport i infrastruktura · 25/09/2013

Airworthiness Directives; Agusta S.p.A. (Type Certificate Currently Held by Agusta Westland S.p.A) (Agusta) Helicopters

We are superseding an airworthiness directive (AD) for Agusta Model A109E helicopters that required 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. Since we issued that AD, the manufacturer has redesigned a T/R grip bushing (bushing) that reduces the loads, which caused the T/R cracking, on the T/R blades. This action 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. These actions are intended to prevent fatigue failure of a T/R blade and subsequent loss of control of the helicopter.

Source: Federal Register — Transportation DepartmentOpen original release →