Airworthiness Directives; Agusta S.p.A. (Type Certificate Currently Held by AgustaWestland S.p.A.) (Agusta) Helicopters
airworthiness · Rule · Final rule. · Published 2014-01-31 · Effective 2014-03-07 · 79 FR 5257
Document
Document number
2014-01953
Federal Register citation
79 FR 5257
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Agusta S.p.A. (Type Certificate Currently Held by AgustaWestland S.p.A.) (Agusta)
Publication date
2014-01-31
Effective date
2014-03-07
FAA docket
Docket No. FAA-2013-0478
Abstract
We are adopting a new airworthiness directive (AD) for certain Agusta Model A109C, A109E, A109S, A109K2, and AW109SP helicopters. This AD requires inspecting the lock wires securing the tail rotor (T/R) duplex bearing locking nut (locking nut) to determine whether any lock wires are missing or damaged. This AD was prompted by reports of loosening T/R locking nuts. The actions of this AD are intended to prevent failure of the T/R and subsequent loss of control of the helicopter.