# STC SR00305DE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Simplex Manufacturing Company, United States
- Description: Installation of Simplex Model 4900-010 spray system.
- Status date: August 6, 1997
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS R00006DE](https://openairdocs.org/tcds/R00006DE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3A657CA6A237673B85256CC200622502.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR00305DE

## ADs that name it (0)

None.

## Approved models (3)

- Bell Helicopter Textron OH-58A ([TCDS R00006DE](https://openairdocs.org/tcds/R00006DE))
- Bell Helicopter Textron OH-58A+ ([TCDS R00006DE](https://openairdocs.org/tcds/R00006DE))
- Bell Helicopter Textron OH-58C ([TCDS R00006DE](https://openairdocs.org/tcds/R00006DE))

---
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.