Airworthiness Directives; Bell Helicopter Textron Canada Model 407 Helicopters
airworthiness · Rule · Final rule; request for comments. · Published 2000-02-17 · Effective 2000-03-03 · 65 FR 8032
Document
Document number
00-3793
Federal Register citation
65 FR 8032
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Bell Helicopter Textron Canada Model 407
Publication date
2000-02-17
Effective date
2000-03-03
FAA docket
Docket No. 99-SW-79-AD
Abstract
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2000-02-12, which was sent previously to all known U.S. owners and operators of Bell Helicopter Textron Canada (BHTC) Model 407 helicopters by individual letters. This AD requires inspecting engine oil cooler blower shaft bearings (bearings) for roughness at specified time intervals and replacing any rough bearings before further flight. This amendment is prompted by several bearing failures. The actions specified by this AD are intended to prevent bearing failure, loss of tail rotor drive, and a subsequent forced landing.