AircraftDirectives
Airworthiness Directive

AD 2021-04-12 86 FR 13162

Federal Aviation Administration · 14 CFR part 39

FR document
2021-03656
Amendment
39-21433
Published
2021-03-08
Models covered
1
Last live check
2026-08-17

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AD

2021-04-12

FR doc 2021-03656 · 86 FR 13162

AD 2021-04-12Published 2021-03-08Effective 2021-04-12

Requires installing a certain part numbered kit and removing parts from service or replacing a certain part- numbered T/R drive shaft assembly.

Full official abstract

The FAA is adopting a new airworthiness directive (AD) for Robinson Helicopter Company (Robinson) Model R66 helicopters. This AD was prompted by reports of tail rotor (T/R) drive shaft forward hanger bearing failures. This AD requires installing a certain part numbered kit and removing parts from service or replacing a certain part- numbered T/R drive shaft assembly. This AD also prohibits the installation of certain parts. The FAA is issuing this AD to address the unsafe condition on these products.

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Applies to 1 model in our index