# Proposed AD FAA-2021-1010: Stemme AG Gliders

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-03-07
- Products: Stemme
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 22, 2021, 86 FR 66229
- Comments due: January 6, 2022
- Became: [AD 2022-03-07](https://openairdocs.org/ad/2022-03-07)
- Docket: FAA-2021-1010 (https://www.regulations.gov/docket/FAA-2021-1010, where comments are filed)
- Project: MCAI-2020-00807-G
- FR document: 2021-25341
- Official PDF: https://openairdocs.org/files/sha256/6e/35/6e35fbabd29a105042f20f1fe1141d51415edf75b138aa43b58b125d3ff8eeec (from https://www.govinfo.gov/content/pkg/FR-2021-11-22/pdf/2021-25341.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/11/22/2021-25341/airworthiness-directives-stemme-ag-gliders
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2021-25341-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2021-1010

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Stemme AG TSA-M Model S6 and S6-RT gliders. This proposed AD was prompted by mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as a new version of the propeller gearbox tooth belt with a reduced life limit. This proposed AD would require establishing a life limit of 5 years for certain propeller gearbox tooth belts. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Nov 22, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-25341, comments due Jan 6, 2022 (https://www.federalregister.gov/documents/2021/11/22/2021-25341/airworthiness-directives-stemme-ag-gliders)

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