# STC SA3-81

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Butler Aviation - O'Hare, Inc, United States
- Description: Installation of nose cone with pitot tube.
- Status date: June 22, 1983
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-765](https://openairdocs.org/tcds/A-765)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/21BC56C6C4C3F2AE85256CC20008CD30.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3-81

## ADs that name it (0)

None.

## Approved models (6)

- Raytheon Aircraft Company C-45G ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company C-45H ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company D18C ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company D18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company TC-45G ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company TC-45H ([TCDS A-765](https://openairdocs.org/tcds/A-765))

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