airworthiness · Rule · Final rule. · Published 2012-06-21 · Effective 2012-07-26 · 77 FR 37283
Document
Document number
2012-15182
Federal Register citation
77 FR 37283
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Turbomeca S.A. Turboshaft
Publication date
2012-06-21
Effective date
2012-07-26
FAA docket
Docket No. FAA-2012-0057
Abstract
We are adopting a new airworthiness directive (AD) for Turbomeca S.A. Arriel 2C1, 2C2, and 2S2 turboshaft engines. This AD requires replacement of affected digital engine control units (DECUs). This AD was prompted by a report of a helicopter experiencing a DECU malfunction during flight. We are issuing this AD to prevent loss of automatic control on one or both engines installed on the same helicopter, which could result in an uncommanded in-flight engine shutdown, forced autorotation landing, or accident.