# STC SA446GL

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Burlington Northern Airmotive, United States
- Description: Installation of Tull microwave landing system airborne equipment. (177RG S/N 177RG1267 AND SUBSEQUENT)
- Status date: September 17, 1980
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A20CE](https://openairdocs.org/tcds/A20CE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AEACE6DC6E926E8D85256CC2000E3CA8.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA446GL

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 177RG ([TCDS A20CE](https://openairdocs.org/tcds/A20CE))

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