# STC SA4091NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Learjet Inc, United States
- Description: Intallation of Honeywell vertical speed indicator/traffic resolution advisory (VSI/TRA) displays. (DHC-8 -102, -103) STC SA4593NM-D is required.
- Status date: March 7, 2002
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A13NM](https://openairdocs.org/tcds/A13NM)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4ED15D4DA323CAD985256CC2000C60B9.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4091NM

## ADs that name it (0)

None.

## Approved models (1)

- Bombardier-Rotax GmbH DHC-8 ([TCDS A13NM](https://openairdocs.org/tcds/A13NM))

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