# STC SA1-423

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Robert A Greimel, United States
- Description: Sensenich M74CK-2 fixed pitch metal propeller.
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-691](https://openairdocs.org/tcds/A-691)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8CE913E601CB216F85256CC10080DB46.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-423

## ADs that name it (0)

None.

## Approved models (1)

- The New Piper Aircraft Inc. J3 Series ([TCDS A-691](https://openairdocs.org/tcds/A-691))

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