# STC SP09397SC

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Schweis Robert W, United States
- Description: Installation of a propeller blade seal.
- Status date: January 9, 1998
- Product: Propeller
- Certification basis: Part 21
- Data sheets: TCDS 249, [TCDS P-206](https://openairdocs.org/tcds/P-206), [TCDS P-257](https://openairdocs.org/tcds/P-257)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7DA8100A14CB7CFF85256CC2006223F4.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SP09397SC

## ADs that name it (0)

None.

## Approved models (3)

- Hamilton Standard Division 12D ([TCDS P-257](https://openairdocs.org/tcds/P-257))
- Hamilton Standard Division 2D ([TCDS P-206](https://openairdocs.org/tcds/P-206))
- Hamilton Standard Division 3D (TCDS 249)

---
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.