airworthiness · Rule · Final rule. · Published 2014-06-30 · Effective 2014-08-04 · 79 FR 36634
Document
Document number
2014-14951
Federal Register citation
79 FR 36634
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Turbomeca S.A. Turboshaft
Publication date
2014-06-30
Effective date
2014-08-04
FAA docket
Docket No. FAA-2006-23809
Abstract
We are superseding airworthiness directive (AD) 2007-10-07 for all Turbomeca S.A. Arriel 2B, 2B1, and 2B1A turboshaft engines. AD 2007-10-07 required an inspection of the splines of the coupling assembly and the hydro-mechanical metering unit (HMU) drive gear shaft for wear. This AD requires the same inspection and expands the affected population. This AD also removes Arriel 2B1A engines from the applicability. We are issuing this AD to prevent failure of the HMU drive gear shaft, which could lead to damage to the engine and damage to the airplane.