# STC SA550GL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: McCormick William, United States
- Description: Installation of Mitchell automatic flight system Model AK457 consisting of Century I autopilot with optional omni tracker system.
- Status date: October 15, 1986
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A19](https://openairdocs.org/tcds/3A19)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7C2118272BBBDFCB85256CC20012299C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA550GL

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 152 ([TCDS 3A19](https://openairdocs.org/tcds/3A19))

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