airworthiness · Rule · Final rule. · Published 2020-11-02 · Effective 2020-12-07 · 85 FR 69131
Document
Document number
2020-23977
Federal Register citation
85 FR 69131
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Airbus
Publication date
2020-11-02
Effective date
2020-12-07
FAA docket
Docket No. FAA-2020-0618
Abstract
The FAA is adopting a new airworthiness directive (AD) for Airbus Helicopters Model AS-365N2, AS 365 N3, EC 155B, EC155B1, and SA- 365N1 helicopters. This AD requires inspecting the tail rotor gearbox (TGB) housing recess, and depending on the inspection results, performing more in-depth inspections and removing certain parts from service. This AD also prohibits installing a TGB unless it has passed certain inspections and has a new TGB control rod bearing installed. This AD was prompted by the discovery of a foreign object obstructing the oil duct of a TGB control bearing. The actions of this AD are intended to address an unsafe condition on these products.