airworthiness · Rule · Final rule. · Published 2017-03-09 · Effective 2017-04-13 · 82 FR 13062
Document
Document number
2017-04634
Federal Register citation
82 FR 13062
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Safran Helicopter
Publication date
2017-03-09
Effective date
2017-04-13
FAA docket
Docket No. FAA-2016-7850
Abstract
We are adopting a new airworthiness directive (AD) for all Safran Helicopter Engines, S.A. Arriel 2B turboshaft engines. This AD requires removing any pre-modification (mod) TU 158 hydro-mechanical metering unit (HMU) and replacing with a part eligible for installation. This AD was prompted by a report of an uncommanded in- flight shutdown (IFSD) on a single-engine helicopter, caused by a low returning spring rate of the needle of the HMU. We are issuing this AD to correct the unsafe condition on these products.