Airworthiness Directives; Bell Helicopter Textron Helicopters
airworthiness · Rule · Final rule. · Published 2012-11-15 · Effective 2012-12-20 · 77 FR 68055
Document
Document number
2012-27059
Federal Register citation
77 FR 68055
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Bell Helicopter Textron
Publication date
2012-11-15
Effective date
2012-12-20
FAA docket
Docket No. FAA-2012-0530
Abstract
We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron (BHT) Model 412, 412EP, and 412CF helicopters. This AD requires a repetitive inspection of the collective lever for a crack, and if there is a crack, before further flight, replacing the collective lever with an airworthy collective lever. This AD was prompted by a reported failure of a collective lever. The actions are intended to detect a crack in the collective lever, which could lead to failure of the collective lever and subsequent loss of control of the helicopter.