# STC SH4-693

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Texas Gulf Sulphur Co, United States
- Description: Landing gear extended and electro-magnetic prospecting equipment installed.
- Status date: January 1, 1960
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 2H1](https://openairdocs.org/tcds/2H1), [TCDS 2H3](https://openairdocs.org/tcds/2H3), [TCDS H-1](https://openairdocs.org/tcds/H-1)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DAA84EFBC62B1CCE862570D200690797.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH4-693

## ADs that name it (0)

None.

## Approved models (3)

- Bell Helicopter Textron 47 Series ([TCDS 2H1](https://openairdocs.org/tcds/2H1))
- Bell Helicopter Textron 47 Series ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- Bell Helicopter Textron 47 Series ([TCDS H-1](https://openairdocs.org/tcds/H-1))

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