airworthiness · Rule · Final rule. · Published 2020-09-10 · Effective 2020-10-15 · 85 FR 55781
Document
Document number
2020-19906
Federal Register citation
85 FR 55781
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Leonardo S.p.a.
Publication date
2020-09-10
Effective date
2020-10-15
FAA docket
Docket No. FAA-2020-0554
Abstract
The FAA is adopting a new airworthiness directive (AD) for Leonardo S.p.a. (Leonardo) Model AB139 and AW139 helicopters. This AD requires removing certain main gearbox (MGB) input modules from service. This AD was prompted by the discovery that a batch of duplex bearings, which are installed on the MGB input modules, are defective. The actions of this AD are intended to address an unsafe condition on these products.