# STC SA1-488

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Butler Aviation, United States
- Description: Various radio and modifications plus rearrangement of control head on pedestal and revised radio electrical circuitry.
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 6A6](https://openairdocs.org/tcds/6A6)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/66887E3D0475467585256CC10080DB6D.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1-488

## ADs that name it (0)

None.

## Approved models (1)

- Tracor Flight Systems Inc. 340 ([TCDS 6A6](https://openairdocs.org/tcds/6A6))

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