# Airworthiness Directives; Dornier Model 328-300 Series Airplanes
> **Rule** · Final rule. · Published 2001-06-13 · Effective 2001-07-18 · 66 FR 31835
## Document
- **Document number:** 01-14532
- **Category:** airworthiness
- **Manufacturer:** Dornier Model 328-300 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 66 FR 31835
- **Publication date:** 2001-06-13
- **Effective date:** 2001-07-18
- **FAA docket:** Docket No. 2000-NM-386-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Dornier Model 328-300 series airplanes, that requires replacement of the hydraulic line between the main hydraulic pump and the pulsation damper in hydraulic system "B" with a new hydraulic flex hose. This action is necessary to prevent cracking in the hydraulic line (due to a production defect), leading to heavy leakage in hydraulic system "B," which could impair the functioning of the airplane's flaps, roll spoilers, inner ground spoilers, and nose wheel steering. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/06/13/01-14532/airworthiness-directives-dornier-model-328-300-series-airplanes)
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