# STC SA2019SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: AlliedSignal Commercial Avionics Systems
- Description: Installation of Allied/Bendix microwave landing system MLS-21.
- Status date: December 5, 1986
- Data sheets: A23SO
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/18C7D34E18F8013985256CC10083D546.0001
- Page: https://openairdocs.org/stc/SA2019SO

## ADs that name it

None.

## Approved models (1)

- The New Piper Aircraft Inc. PA-42-720 (TCDS A23SO)

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From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.