Airworthiness Directives; Bell Helicopter Textron Canada Model 407 Helicopters
airworthiness · Rule · Final rule; request for comments. · Published 2002-04-17 · Effective 2002-05-02 · 67 FR 18815
Document
Document number
02-9173
Federal Register citation
67 FR 18815
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Bell Helicopter Textron Canada Model 407
Publication date
2002-04-17
Effective date
2002-05-02
FAA docket
Docket No. 2002-SW-08-AD
Abstract
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2002-06-52, 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 a one-time replacement of certain bearings and, before further flight, adding a limitation and caution to the rotorcraft flight manual (RFM) and at specified intervals, inspecting, replacing, and lubricating certain oil cooler blower bearings. This AD is prompted by several occurrences of failure of an oil cooler blower bearing. The actions specified by this AD are intended to prevent failure of an oil cooler blower bearing, loss of tail rotor drive, and a subsequent forced landing.