airworthiness · Rule · Final rule; request for comments. · Published 2014-08-05 · Effective 2014-08-20 · 79 FR 45322
Document
Document number
2014-18163
Federal Register citation
79 FR 45322
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
MD
Publication date
2014-08-05
Effective date
2014-08-20
FAA docket
Docket No. FAA-2014-0514
Abstract
We are adopting a new airworthiness directive (AD) for MD Helicopters, Inc. (MDHI), Model MD900 helicopters. This AD requires an eddy current inspection of the main rotor upper hub assembly (upper hub) for a crack and replacing the upper hub with an airworthy upper hub before further flight if there is a crack. This AD is prompted by a report of cracks on an upper hub at the blade attach holes. The actions specified by this AD are intended to detect a crack in the upper hub to prevent failure of the upper hub and subsequent loss of control of the helicopter.