Airworthiness Directives; Eurocopter France Model AS 332C, L, and L1 Helicopters

This amendment adopts a new airworthiness directive (AD) that is applicable to Eurocopter France Model AS 332C, L, and L1 helicopters. This action requires greasing and inspecting main rotor blade horn eye bolts (eye bolts), and replacing certain eye bolt bearings (bearings) with airworthy bearings. This amendment is prompted by one report of abnormally high amplitude inflight vibrations due to failure of a bearing. The actions specified in this AD are intended to prevent failure of a bearing, due to premature wear caused by an improper axial pre-load, which could result in loss of main rotor blade pitch control and subsequent loss of control of the helicopter.