# STC SA3125SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: ISRMS, Inc, United States
- Description: Installation of a custom interior for a new concept DC-3C, Type II aircraft.
- Status date: September 11, 1991
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-669](https://openairdocs.org/tcds/A-669)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BF81E2DD46DF060285256CC2000A9425.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3125SO

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC3C-S1C3G ([TCDS A-669](https://openairdocs.org/tcds/A-669))

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