# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2018-10-24 · Effective 2018-11-28 · 83 FR 53569
## Document
- **Document number:** 2018-23036
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 53569
- **Publication date:** 2018-10-24
- **Effective date:** 2018-11-28
- **FAA docket:** Docket No. FAA-2018-0078
## Abstract

We are superseding Airworthiness Directive (AD) 2017-01-02, which applied to certain The Boeing Company Model 787-8 and 787-9 airplanes. AD 2017-01-02 required an inspection for discrepant inboard and outboard trailing edge flap rotary actuators, and replacing the rotary actuator or doing related investigative and corrective actions if necessary. This AD continues to retain those actions. This AD also adds airplanes to the applicability and reduces the number of affected actuators. This AD was prompted by a report indicating that some inboard and outboard trailing edge flap rotary actuators may have been assembled with an incorrect no-back brake rotor-stator stack sequence during manufacturing. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/10/24/2018-23036/airworthiness-directives-the-boeing-company-airplanes)
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