# Airworthiness Directives; Fokker Services B.V. Airplanes
> **Rule** · Final rule. · Published 2018-11-27 · Effective 2019-01-02 · 83 FR 60762
## Document
- **Document number:** 2018-25662
- **Category:** airworthiness
- **Manufacturer:** Fokker Services B.V.
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 60762
- **Publication date:** 2018-11-27
- **Effective date:** 2019-01-02
- **FAA docket:** Docket No. FAA-2018-0707
## Abstract

We are adopting a new airworthiness directive (AD) for all Fokker Services B.V. Model F28 airplanes. This AD was prompted by reports that filters, which are integral to certain T-unions in the landing gear hydraulic control system, disconnected from their housing and, in some cases, migrated. This AD requires replacing certain T- unions with an integral filter with T-unions without an integral filter. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/11/27/2018-25662/airworthiness-directives-fokker-services-bv-airplanes)
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