Airworthiness Directives; Bell Helicopter Textron Canada (BHTC) Model 407 and Model 427 Helicopters
airworthiness · Rule · Final rule; request for comments. · Published 2009-12-11 · Effective 2009-12-28 · 74 FR 65684
Document
Document number
E9-29427
Federal Register citation
74 FR 65684
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Bell Helicopter Textron Canada (BHTC) Model 407 and Model 427
Publication date
2009-12-11
Effective date
2009-12-28
FAA docket
Docket No. FAA-2009-1123
Abstract
We are adopting a new airworthiness directive (AD) for the BHTC Model 407 and Model 427 helicopters. This AD results from mandatory continuing airworthiness information (MCAI) ADs issued by the aviation authority of Canada. The MCAI ADs state that some hydraulic pump driveshaft assemblies may have been delivered with a missing internal plug or fastening rivet. This condition, if not corrected, could result in a loss of hydraulic pressure and subsequent loss of control of the helicopter.