# STC SA3-301

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Capitol Aviation Inc, United States
- Description: Hand-operated hydraulic pump deactivated or removed and replaced with electric-driven equivalent.
- Status date: January 1, 1960
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A87DEC10F528E212862570CA007761EA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3-301

## ADs that name it (0)

None.

## Approved models (1)

- Twin Commander Aircraft Corporation 680 Series ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

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