# STC ST555CH

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Southern Air Transport, United States
- Description: Approve operation at runway gradients up to  8 %.
- Status date: October 2, 1996
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A1SO](https://openairdocs.org/tcds/A1SO)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A567234828F0B25885256CC300036085.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST555CH

## ADs that name it (0)

None.

## Approved models (5)

- Lockheed Aircraft Corporation 382 ([TCDS A1SO](https://openairdocs.org/tcds/A1SO))
- Lockheed Aircraft Corporation 382B ([TCDS A1SO](https://openairdocs.org/tcds/A1SO))
- Lockheed Aircraft Corporation 382E ([TCDS A1SO](https://openairdocs.org/tcds/A1SO))
- Lockheed Aircraft Corporation 382F ([TCDS A1SO](https://openairdocs.org/tcds/A1SO))
- Lockheed Aircraft Corporation 382G ([TCDS A1SO](https://openairdocs.org/tcds/A1SO))

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