Airworthiness Directives; Various Restricted Category Helicopters
airworthiness · Rule · Final rule. · Published 2016-11-22 · Effective 2016-12-27 · 81 FR 83660
Document
Document number
2016-27767
Federal Register citation
81 FR 83660
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Various Restricted Category
Publication date
2016-11-22
Effective date
2016-12-27
FAA docket
Docket No. FAA-2015-3820
Abstract
We are adopting a new airworthiness directive (AD) for various restricted category helicopters. This AD requires cleaning and visually inspecting certain main rotor (M/R) blades and, depending on the outcome of the inspections, repairing or replacing the M/R blades. This AD was prompted by a report of an M/R blade with multiple fatigue cracks around the blade retention bolt hole. The actions are intended to detect a crack in the M/R blade, and prevent failure of the M/R blade and subsequent loss of helicopter control.