Airworthiness Directives; Bell Helicopter Textron, Inc. Model 205A, 205A-1, 205B, 212, 412, 412CF, and 412EP Helicopters
airworthiness · Rule · Final rule; request for comments. · Published 2011-06-17 · Effective 2011-07-05 · 76 FR 35334
Document
Document number
2011-14247
Federal Register citation
76 FR 35334
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Publication date
2011-06-17
Effective date
2011-07-05
FAA docket
Docket No. FAA-2011-0561
Abstract
This amendment adopts a new airworthiness directive (AD) for the specified Bell Helicopter Textron, Inc. (BHT) model helicopters with tail rotor (T[sol]R) blades with certain serial numbers installed. This action requires a one-time inspection of the T[sol]R blade for corrosion or pitting, and repairing or replacing the T[sol]R blade, if that condition is found during the inspection. This amendment is prompted by a report from the manufacturer that T[sol]R blades with certain serial numbers may have manufacturing anomalies in the spar area. These actions are intended to detect corrosion or pitting in the forward spar area of a T[sol]R blade to prevent a crack in the T[sol]R blade, loss of the T[sol]R blade, and subsequent loss of control of the helicopter.