# Proposed AD 97-CE-104-AD: Alexander Schleicher Model ASK-21 Sailplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-09-13
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 12, 1998, 63 FR 7082
- Comments due: March 17, 1998
- Became: [AD 98-09-13](https://openairdocs.org/ad/98-09-13)
- Docket: 97-CE-104-AD
- FR document: 98-3519
- Official PDF: https://openairdocs.org/files/sha256/b1/35/b135b702637ac6bcb539c42370b7ff8cd0649f33224d98c14b2087154a5dff55 (from https://www.govinfo.gov/content/pkg/FR-1998-02-12/pdf/98-3519.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/02/12/98-3519/airworthiness-directives-alexander-schleicher-model-ask-21-sailplanes
- Page: https://openairdocs.org/proposed/97-CE-104-AD

## Summary

This document proposes to adopt a new airworthiness directive (AD) that would apply to Alexander Schleicher (Schleicher) Model ASK-21 sailplanes. The proposed action would require inspecting the S-shaped rudder pedal tube for displacement, and correcting any displacement of the plastic tube. 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 rudder control jamming, which, if not corrected, could result in loss of directional control of the sailplane.

## Notices in this docket

- Feb 12, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-3519, comments due Mar 17, 1998 (https://www.federalregister.gov/documents/1998/02/12/98-3519/airworthiness-directives-alexander-schleicher-model-ask-21-sailplanes)

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