# Proposed AD 99-CE-07-AD: Stemme GmbH & Co. KG Model S10-VT Sailplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-15-03
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 26, 1999, 64 FR 20229
- Comments due: May 28, 1999
- Became: [AD 99-15-03](https://openairdocs.org/ad/99-15-03)
- Docket: 99-CE-07-AD
- FR document: 99-10311
- Official PDF: https://openairdocs.org/files/sha256/49/45/49455ced5de9fa1d2d90d40dbc20902b22ea01ebc56df415a58e0db05a39e4dd (from https://www.govinfo.gov/content/pkg/FR-1999-04-26/pdf/99-10311.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/04/26/99-10311/airworthiness-directives-stemme-gmbh-and-co-kg-model-s10-vt-sailplanes
- Page: https://openairdocs.org/proposed/99-CE-07-AD

## Summary

This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Stemme GmbH & Co. KG (Stemme) Model S10-VT sailplanes. The proposed AD would require modifying the wastegate control in order to eliminate heat damage. 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 the wastegate control from malfunctioning because of heat damage, which could result in loss of automatic manifold pressure control and engine damage.

## Notices in this docket

- Apr 26, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-10311, comments due May 28, 1999 (https://www.federalregister.gov/documents/1999/04/26/99-10311/airworthiness-directives-stemme-gmbh-and-co-kg-model-s10-vt-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.