Airworthiness Directives; Boeing Vertol Model 107-II Helicopters
airworthiness · Rule · Final rule; request for comments. · Published 2005-11-23 · Effective 2005-12-08 · 70 FR 70718
Document
Document number
05-23156
Federal Register citation
70 FR 70718
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Boeing Vertol Model 107-II
Publication date
2005-11-23
Effective date
2005-12-08
FAA docket
Docket No. FAA-2005-23085
Abstract
This amendment adopts a new airworthiness directive (AD) for Boeing Vertol (Boeing) Model 107-II helicopters. This action requires a visual and magnetic particle inspection of the quill shaft. This amendment is prompted by the discovery of cracks in a quill shaft during a routine inspection. The actions specified in this AD are intended to detect a fatigue crack in a quill shaft and prevent separation of the quill shaft between the aft transmission and the mix box assembly, loss of rotor synchronization, and subsequent loss of control of the helicopter.