# Airworthiness Directives; Bell Helicopter Textron Canada Helicopters
> **Rule** · Final rule. · Published 2016-04-25 · Effective 2016-05-31 · 81 FR 24010
## Document
- **Document number:** 2016-09236
- **Category:** airworthiness
- **Manufacturer:** Bell Helicopter Textron Canada
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 81 FR 24010
- **Publication date:** 2016-04-25
- **Effective date:** 2016-05-31
- **FAA docket:** Docket No. FAA-2013-0734
## Abstract

We are superseding Airworthiness Directive (AD) 2010-19-51 for Bell Helicopter Textron Canada (Bell) Model 222, 222B, 222U, 230, and 430 helicopters. AD 2010-19-51 required inspecting parts of the main rotor hydraulic servo actuator (servo actuator) for certain conditions and replacing any unairworthy parts before further flight. This new AD requires installing a servo actuator with a new stainless steel piston rod. This AD was prompted by a collective servo actuator malfunction. We are issuing this AD to detect corrosion on a piston rod, which could result in failure of the servo actuator and consequent loss of helicopter control.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/04/25/2016-09236/airworthiness-directives-bell-helicopter-textron-canada-helicopters)
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