Airworthiness Directives; Agusta S.p.A. Model A109K2 Helicopters
airworthiness · Rule · Final rule; request for comments. · Published 1997-12-17 · Effective 1998-01-02 · 62 FR 66001
Document
Document number
97-32992
Federal Register citation
62 FR 66001
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Agusta S.p.A. Model A109K2
Publication date
1997-12-17
Effective date
1998-01-02
FAA docket
Docket No. 97-SW-54-AD
Abstract
This amendment adopts a new airworthiness directive (AD) that is applicable to Agusta S.p.A (Agusta) Model A109K2 helicopters. This action requires inspecting the Gleason crown on the main transmission for cracks, and replacing the Gleason crown with an airworthy Gleason crown if any crack is found. This amendment is prompted by three reports of fatigue cracks found in the Gleason crown. The actions specified in this AD are intended to prevent failure of the Gleason crown, failure of the main transmission and subsequent loss of control of the helicopter.