# STC SA3-302

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Butler Aviation - O'Hare, Inc, United States
- Description: Installation of Janitrol Series S-200 heater.
- Status date: May 27, 1983
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-618](https://openairdocs.org/tcds/A-618), [TCDS A-669](https://openairdocs.org/tcds/A-669)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/34FEE2AC89608F8085256CC20008CC1F.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3-302

## ADs that name it (0)

None.

## Approved models (10)

- McDonnell Douglas Corporation DC-3 Series ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- McDonnell Douglas Corporation DC3-G102 ([TCDS A-618](https://openairdocs.org/tcds/A-618))
- McDonnell Douglas Corporation DC3-G102A Series ([TCDS A-618](https://openairdocs.org/tcds/A-618))
- McDonnell Douglas Corporation DC3-G103A ([TCDS A-618](https://openairdocs.org/tcds/A-618))
- McDonnell Douglas Corporation DC3-G202A Series ([TCDS A-618](https://openairdocs.org/tcds/A-618))
- McDonnell Douglas Corporation DC3A-S1C3G ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- McDonnell Douglas Corporation DC3A-S1CG ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- McDonnell Douglas Corporation DC3A-SC3G ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- McDonnell Douglas Corporation DC3A-SCG ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- McDonnell Douglas Corporation DC3C-R-1830-90C (Army C-47B) ([TCDS A-669](https://openairdocs.org/tcds/A-669))

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