airworthiness · Rule · Final rule; request for comments. · Published 2005-05-27 · Effective 2005-06-13 · 70 FR 30613
Document
Document number
05-10295
Federal Register citation
70 FR 30613
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Turbomeca S.A. Arrius 1A Turboshaft
Publication date
2005-05-27
Effective date
2005-06-13
FAA docket
Docket No. FAA-2005-21273
Abstract
The FAA is adopting a new airworthiness directive (AD) for Turbomeca S.A. Arrius 1A turboshaft engines. This AD requires initial and repetitive testing of the Free Turbine Overspeed Protection System. This AD results from an investigation into the Digital Electronic Control Unit (DECU) that revealed a malfunction of the Free Turbine Overspeed Protection System. This malfunction can exist despite the DECU passing all functional tests specified in the Engine Maintenance Manual. We are issuing this AD to prevent uncontained engine failure if a free turbine overspeed occurs.