airworthiness · Rule · Final rule. · Published 2020-09-22 · Effective 2020-10-27 · 85 FR 59404
Document
Document number
2020-20750
Federal Register citation
85 FR 59404
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Leonardo S.p.a.
Publication date
2020-09-22
Effective date
2020-10-27
FAA docket
Docket No. FAA-2020-0411
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. (Leonardo) Model A119 and AW119 MKII helicopters. This AD requires repetitive borescope inspections of the tail rotor gearbox (TGB) and depending on the inspection results, removing the TGB from service. This AD was prompted by reports of corrosion on the internal surface of the 90-degree TGB output shaft. The actions of this AD are intended to address an unsafe condition on these products.