# Proposed AD 97-CE-109-AD: Alexander Schleicher Segelflugzeugbau Model ASK-21 Sailplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-06-38
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 19, 1997, 62 FR 66567
- Comments due: January 19, 1998
- Became: [AD 98-06-38](https://openairdocs.org/ad/98-06-38)
- Docket: 97-CE-109-AD
- FR document: 97-33147
- Official PDF: https://openairdocs.org/files/sha256/fc/f9/fcf902790decea911d4d2c0dead779966d26be4e3eaf16357cd14a631ea3c4a0 (from https://www.govinfo.gov/content/pkg/FR-1997-12-19/pdf/97-33147.pdf)
- Federal Register: https://www.federalregister.gov/documents/1997/12/19/97-33147/airworthiness-directives-alexander-schleicher-segelflugzeugbau-model-ask-21-sailplanes
- Page: https://openairdocs.org/proposed/97-CE-109-AD

## Summary

This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK-21 sailplanes that do not have a certain automatic elevator connection installed. The proposed AD would require drilling a drainage hole in the elevator pushrod, inspecting the elevator pushrod for corrosion damage, and replacing any elevator pushrod if a certain amount of corrosion damage is found. The proposed AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. The actions specified by the proposed AD are intended to prevent failure of the elevator pushrod caused by corrosion damage, which could result in loss of control of the sailplane.

## Notices in this docket

- Dec 19, 1997: Notice of proposed rulemaking (NPRM). (first notice), FR document 97-33147, comments due Jan 19, 1998 (https://www.federalregister.gov/documents/1997/12/19/97-33147/airworthiness-directives-alexander-schleicher-segelflugzeugbau-model-ask-21-sailplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.