Airworthiness Directives; Boeing Vertol (Type Certificate Currently Held by Columbia Helicopters, Inc. (CHI)) and Kawasaki Heavy Industries, Limited Helicopters (Kawasaki)
airworthiness · Rule · Final rule; request for comments. · Published 2012-07-23 · Effective 2012-08-07 · 77 FR 42954
Document
Document number
2012-17278
Federal Register citation
77 FR 42954
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Boeing Vertol (Type Certificate Currently Held by Columbia
Publication date
2012-07-23
Effective date
2012-08-07
FAA docket
Docket No. FAA-2012-0730
Abstract
We are adopting a new airworthiness directive (AD) for CHI Model 107-II and Kawasaki Model KV107-II and KV107-IIA helicopters. This AD requires, before further flight, replacing certain upper collective pitch control yoke bolts. This AD is prompted by three failures of the affected bolts. These actions are intended to prevent failure of an upper collective pitch control yoke bolt (bolt), excessive vibration, migration of the shafts, and subsequent loss of control of the helicopter.