# STC SA1-121

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Ohio Aviation Co, United States
- Description: Airspeed pitots on each wing tip and flush button static system located in nose of fuselage.
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-723](https://openairdocs.org/tcds/A-723)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A6E57D966F94F6B185256CC1007F3B85.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-121

## ADs that name it (0)

None.

## Approved models (1)

- Lockheed Aircraft Corporation Lockheed 18 ([TCDS A-723](https://openairdocs.org/tcds/A-723))

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