# Proposed AD FAA-2017-0952: Stemme AG Gliders

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-03-16
- Products: Stemme
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 10, 2017, 82 FR 46938
- Comments due: November 24, 2017
- Became: [AD 2018-03-16](https://openairdocs.org/ad/2018-03-16)
- Docket: FAA-2017-0952 (https://www.regulations.gov/docket/FAA-2017-0952, where comments are filed)
- FR document: 2017-21226
- Official PDF: https://openairdocs.org/files/sha256/31/04/31041ec62f02ae98b5fd51ad3b3dbbf4a00ee5f670482eb37e067e76ad3a57fc (from https://www.govinfo.gov/content/pkg/FR-2017-10-10/pdf/2017-21226.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/10/10/2017-21226/airworthiness-directives-stemme-ag-gliders
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D63CA59BE0F26E19862581B5004640D3.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0952

## Summary

We propose to supersede Airworthiness Directive (AD) 2017-10- 11 for Stemme AG Model Stemme S10-VT gliders (type certificate previously held by Stemme GmbH & Co. KG). This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as certain propeller front transmission gear wheels having insufficient material strength because of improper heat treatment during manufacturing. We are issuing this proposed AD to require actions to address the unsafe condition on these products and to add Stemme AG Model Stemme S 12 to the applicability.

## Notices in this docket

- Oct 10, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-21226, comments due Nov 24, 2017 (https://www.federalregister.gov/documents/2017/10/10/2017-21226/airworthiness-directives-stemme-ag-gliders)

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