# STC SA1-140

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Butler Aviation, United States
- Description: Cockpit heater and air intake and blower mounting.
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-762](https://openairdocs.org/tcds/A-762)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D56949E61731929F85256CC1007F3B91.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-140

## ADs that name it (0)

None.

## Approved models (2)

- McDonnell Douglas Corporation C54-DC Series ([TCDS A-762](https://openairdocs.org/tcds/A-762))
- McDonnell Douglas Corporation DC-4 ([TCDS A-762](https://openairdocs.org/tcds/A-762))

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