# Airworthiness Directives; Glaser-Dirks Flugzeugbau GmbH Model DG- 500M Gliders
> **Rule** · Direct final rule; confirmation of effective date. · Published 1998-03-26 · Effective 1998-05-15 · 63 FR 14603
## Document
- **Document number:** 98-7887
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Direct final rule; confirmation of effective date.
- **Citation:** 63 FR 14603
- **Publication date:** 1998-03-26
- **Effective date:** 1998-05-15
- **FAA docket:** Docket No. 97-CE-131-AD
## Abstract

This action confirms the effective date of Airworthiness Directive (AD) 98-04-30, which applies to Glaser-Dirks Flugzeugbau GmbH Model DG-500M gliders. AD 98-04-30 requires repetitively inspecting the propeller mounting plate for cracks, replacing any cracked propeller mounting plate, and modifying the bolt connections of the propeller mounting plate. This AD was the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. The actions specified in this AD are intended to prevent the propeller mounting plate from separating from the glider, which could result in propeller separation and possible loss of control of the glider.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/03/26/98-7887/airworthiness-directives-glaser-dirks-flugzeugbau-gmbh-model-dg--500m-gliders)
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