# STC SH165NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Simplex Manufacturing Co, United States
- Description: Installation of Model 1620 and 1621 aerial seeders systems.
- Status date: March 17, 1975
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H1WE](https://openairdocs.org/tcds/H1WE), [TCDS 4H11](https://openairdocs.org/tcds/4H11)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1CEE13EAC3667BA185256CC2005C2EDA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH165NW

## ADs that name it (0)

None.

## Approved models (4)

- Hiller Aviation UH-12L ([TCDS H1WE](https://openairdocs.org/tcds/H1WE))
- Hiller Aviation UH-12L4 ([TCDS H1WE](https://openairdocs.org/tcds/H1WE))
- Rogerson Hiller Corporation UH-12E ([TCDS 4H11](https://openairdocs.org/tcds/4H11))
- Rogerson Hiller Corporation UH-12E-L ([TCDS 4H11](https://openairdocs.org/tcds/4H11))

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