# STC SE2591CE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Petersen Aviation Inc, United States
- Description: Add unleaded automotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index(RON + MON)/2, per ASTM Specification D-439.
- Applied: February 1, 1990
- Status date: March 6, 1990
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS E-2](https://openairdocs.org/tcds/E-2)
- Certificate PDF: https://openairdocs.org/files/sha256/92/88/92887ee31fbfdecc8cf08cc0d46b655ef37c08774b7c611fa94f84f80da476be
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8E5E1FE81BBFEE9386257F2B005D2537.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SE2591CE

## ADs that name it (0)

None.

## Approved models (5)

- Olson George Company Scarab Series 28 ([TCDS E-2](https://openairdocs.org/tcds/E-2))
- Olson George Company Scarab Series 29 ([TCDS E-2](https://openairdocs.org/tcds/E-2))
- Olson George Company Scarab Series 30 ([TCDS E-2](https://openairdocs.org/tcds/E-2))
- Olson George Company Scarab Series 40 ([TCDS E-2](https://openairdocs.org/tcds/E-2))
- Olson George Company Scarab Series 50 ([TCDS E-2](https://openairdocs.org/tcds/E-2))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- March 6, 1990: Issued, Current. [certificate](https://openairdocs.org/files/sha256/92/88/92887ee31fbfdecc8cf08cc0d46b655ef37c08774b7c611fa94f84f80da476be)

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