# Airworthiness Directives; Bombardier, Inc., Airplanes
> **Rule** · Final rule. · Published 2023-10-17 · Effective 2023-11-21 · 88 FR 71464
## Document
- **Document number:** 2023-22871
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 88 FR 71464
- **Publication date:** 2023-10-17
- **Effective date:** 2023-11-21
- **FAA docket:** Docket No. FAA-2023-1493
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-2A12 airplanes. This AD was prompted by a report that some of the multi-function spoiler (MFS) anti-rotation plates failed in-service due to a thin wall design. This AD requires replacing the MFS anti-rotation plates, inspecting the MFS anti-rotation plates for cracking and hinge bolts for evidence of rotation, accomplishing applicable corrective actions, and performing a functional test of the MFS control surfaces. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2023/10/17/2023-22871/airworthiness-directives-bombardier-inc-airplanes)
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