# STC SE1931CE - Type: Supplemental type certificate - Status: Current, Amended - Holder: Petersen Aviation Inc, United States - Description: Add the following approved fuel: unleaded automotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index, (RON+MON)/2. - Applied: July 19, 1983 - Status date: January 5, 2007 - Product: Engine - Certification basis: Part 21 - Data sheets: [TCDS E-274](https://openairdocs.org/tcds/E-274) - Certificate PDF: https://openairdocs.org/files/sha256/bf/6e/bf6ef7222621a7389c1bbde4318a338e06fda568d26ec26e64f9129051529844 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/69B59BB2A195D59E8625732A00521DEC.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SE1931CE ## ADs that name it (0) None. ## Approved models (31) - Textron Lycoming AVCO Corporation O-320-A1A ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-A1B ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-A2A ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-A2B ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-A2C ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-A2D ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-A3A ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-A3B ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-A3C ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-C1A ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-C1B ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-C2A ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-C2B ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-C2C ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-C3A ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-C3B ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-C3C ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E1A ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E1B ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E1C ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E1F ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E1J ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E2A ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E2B ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E2C ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E2D ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E2F ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E2G ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E2H ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E3D ([TCDS E-274](https://openairdocs.org/tcds/E-274)) - Textron Lycoming AVCO Corporation O-320-E3H ([TCDS E-274](https://openairdocs.org/tcds/E-274)) ## What the certificate says Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record. CAR 3 of the Regulations. Original Product Type Certificate Number : E-274 Make: Lycoming Model: O-320, O-320-A1A, -A1B, -A2A, -A2B, -A2C, -A2D, -A3A, - A3B, -A3C, -C1A, -C1B, -C2A, -C2B, -C2C, -C3A, -C3B, -C3C, -E1A, -E1B, -E1C, -E1F, E2A, -E2B, -E2C, -E2D, - E2F, -E2G, -E2H, -E3D, -E3H, -E1J. O-320 B and D Series Models with an FAA Approved conversion not exceeding 150 hp, not exceeding a compression ration of 7.0:1, and listed on Supplemental Type Certificate SE2587CE are also eligible. This STC is not approved for any O-320 H Series engine or any O-320 Series engine exceeding 150 hp and 7.0:1 compression ratio. Add the following approved fuel: unleaded automotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index, (RON+MON)/2, per ASTM Specification D-439 or D-4814. Intermixing with aviation gasoline also approved. Data Required: 1. A copy of this certificate 2. Petersen Drawing List L-320( ), dated December 12, 1983, or later “FAA Approved” revision 1. This approval should not be extended to other specific engines of this model that incorporate any other previously approved modification, unless it is determined that the interrelationship between this change and any other previously approved modification will introduce no adverse effect on the airworthiness of this engine model. Specific approval must be obtained for each model aircraft to insure compatibility with its fuel system 2. Compatibility of this design change with previously appr oved modifications must be determined by the installer. 3. If the STC holder agrees to permit anot her person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. This certificate and the supporting data, which is the basis for approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration. Petersen Aviation, Inc. 984 K Road Minden, NE 68959 Date of application: July 19, 1983 Date of issuance: February 22, 1984 Date amended: November 1, 1984; December 20, 2006; January 5, 2007 ( Signature) Charles D. Riddle Program Manager Wichita Aircraft Certification Office ( Title) Transfer the ownership of the Supplemental Type Certificate Number to (Name of transferee) (Address of transfer) (Number and street) (City, State, and Zip code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and Zip code) Extent of Authority (if licensing agreement): Signature of grantor ( In ink): ## Every issue (2) - January 5, 2007: Amended, Current. [certificate](https://openairdocs.org/files/sha256/bf/6e/bf6ef7222621a7389c1bbde4318a338e06fda568d26ec26e64f9129051529844) - July 19, 1983: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/b9/93/b993787c45cb05bc79ade6498af7d334e5c9342afb03c03cef1325aa9bcdeb45) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.