Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters
airworthiness · Rule · Final rule; request for comments. · Published 2016-09-30 · Effective 2016-10-17 · 81 FR 67102
Document
Document number
2016-23345
Federal Register citation
81 FR 67102
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Bell Helicopter Textron Canada Limited (Bell)
Publication date
2016-09-30
Effective date
2016-10-17
FAA docket
Docket No. FAA-2016-9144
Abstract
We are adopting a new airworthiness directive (AD) for Bell Model 427 and Model 429 helicopters. This AD requires replacing certain engine and transmission oil check valves. This AD also prohibits installing the affected check valves on any helicopter. This AD is prompted by a report of several cracked or leaking check valves. These actions are intended to detect and prevent a cracked or leaking check valve which could result in loss of lubrication to the engine or transmission, failure of the engine or transmission, and subsequent loss of control of the helicopter.