airworthiness · Rule · Final rule; request for comments. · Published 2021-09-08 · Effective 2021-09-23 · 86 FR 50239
Document
Document number
2021-19248
Federal Register citation
86 FR 50239
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Leonardo S.p.a.
Publication date
2021-09-08
Effective date
2021-09-23
FAA docket
Docket No. FAA-2021-0607
Abstract
The FAA is adopting a new airworthiness directive (AD) for all Leonardo S.p.a. Model AB412 and AB412 EP helicopters. This AD was prompted by a report of the failure of both inverters in-flight, leading to an autopilot disconnection. This AD requires a one-time inspection of the clearance between a certain protective grommet installed in the emergency bus interlock compartment and the cable assemblies passing through it, and depending on the finding, applicable corrective actions, as specified in a 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.