# Airworthiness Directives; Bombardier, Inc., Airplanes
> **Rule** · Final rule. · Published 2020-12-23 · Effective 2021-01-27 · 85 FR 83759
## Document
- **Document number:** 2020-28282
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 83759
- **Publication date:** 2020-12-23
- **Effective date:** 2021-01-27
- **FAA docket:** Docket No. FAA-2020-0458
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by a report that corrosion was found on the shock strut cylinders during unscheduled maintenance of the nose landing gear (NLG). This AD requires a modification of the NLG shock strut cylinder. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/12/23/2020-28282/airworthiness-directives-bombardier-inc-airplanes)
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