# STC SA91CH

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aviation Technologies Group, United States
- Description: Installation of a landing light pulsing system.
- Status date: July 23, 1993
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A21EU](https://openairdocs.org/tcds/A21EU), [TCDS A56EU](https://openairdocs.org/tcds/A56EU)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9D99A4C8BA5B87B285256CC20058EA7C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA91CH

## ADs that name it (0)

None.

## Approved models (2)

- British Aerospace (Scotland) HP Jetstream Model 3101 ([TCDS A21EU](https://openairdocs.org/tcds/A21EU))
- British Aerospace (Scotland) Jetstream Model 3201 ([TCDS A56EU](https://openairdocs.org/tcds/A56EU))

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.