# Airworthiness Directives; Dornier Model 328-100 Series Airplanes
> **Rule** · Final rule. · Published 1998-09-22 · Effective 1998-10-27 · 63 FR 50493
## Document
- **Document number:** 98-25026
- **Category:** airworthiness
- **Manufacturer:** Dornier Model 328-100 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 63 FR 50493
- **Publication date:** 1998-09-22
- **Effective date:** 1998-10-27
- **FAA docket:** Docket No. 98-NM-162-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Dornier Model 328-100 series airplanes, that requires replacement of certain landing gear proximity sensor electrical units (PSEU) with improved units. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent the failure of normal extension and retraction of the landing gear, which could result in collapse of the main landing gear upon landing.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/09/22/98-25026/airworthiness-directives-dornier-model-328-100-series-airplanes)
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