airworthiness · Rule · Final rule; request for comments. · Published 2014-03-10 · Effective 2014-03-25 · 79 FR 13199
Document
Document number
2014-04274
Federal Register citation
79 FR 13199
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Agusta S.p.A.
Publication date
2014-03-10
Effective date
2014-03-25
FAA docket
Docket No. FAA-2014-0109
Abstract
We are adopting a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model AB412 and AB412 EP helicopters. This AD requires inspecting the tail rotor (T/R) blade for a crack, corrosion, nick, scratch, dent, or other damage and replacing or repairing the blade, depending on the damage. This AD is prompted by reports of T/R blade failures caused by fatigue cracking that originated from surface damage. These actions are intended to prevent failure of the T/R blade and subsequent loss of control of the helicopter.