# STC SA257NE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Georgetown Aircraft Serv, United States
- Description: Addition of master test switch for warning lights in cockpit.
- Status date: May 3, 1985
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A21EA](https://openairdocs.org/tcds/A21EA)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/41B661E1BEA6EB9485256CC200016008.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA257NE

## ADs that name it (0)

None.

## Approved models (1)

- Bombardier Inc. CL-600-1A11 (CL-600) ([TCDS A21EA](https://openairdocs.org/tcds/A21EA))

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