airworthiness · Rule · Final rule. · Published 2021-09-27 · Effective 2021-11-01 · 86 FR 53195
Document
Document number
2021-20825
Federal Register citation
86 FR 53195
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Leonardo S.p.a.
Publication date
2021-09-27
Effective date
2021-11-01
FAA docket
Docket No. FAA-2021-0505
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. Model AB139 and AW139 helicopters. This AD was prompted by reports of spurious in-flight disconnections of the automatic flight control system (AFCS). This AD requires updating certain "Primus Epic" system software, as specified in a European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.