# STC SA821GL

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: EAA Aviation Foundation, United States
- Description: Superseded by STC SA01944CH.  Modify airplane to fly on unleaded gasoline, 87 minimum antiknock index, STC SE634GL approved.
- Status date: March 5, 2004
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-718](https://openairdocs.org/tcds/A-718)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7AB3F6642987653A86256E6000697DF7.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA821GL

## ADs that name it (0)

None.

## Approved models (2)

- Univair Aircraft Corporation 415-C ([TCDS A-718](https://openairdocs.org/tcds/A-718))
- Univair Aircraft Corporation 415-CD ([TCDS A-718](https://openairdocs.org/tcds/A-718))

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