# STC SA1933CE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Petersen Aviation Inc, United States
- Description: Operation on unleaded and/or leaded automotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index (RON + MON)/2. Intermixing with aviation gasoline also approved.
- Applied: November 6, 1983
- Status date: June 23, 1992
- Product: Aircraft, Small Airplane
- Data sheets: [TCDS 2A10](https://openairdocs.org/tcds/2A10)
- Certificate PDF: https://openairdocs.org/files/sha256/ff/c1/ffc13519104702333529ac7726d16d2fa5a9d40bc49a6098751f163e24ec4ec8
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3C36545F759F5A8185256CC10083D2EE.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1933CE

## ADs that name it (0)

None.

## Approved models (2)

- Lavia Argentina S.A. (Laviasa) PA-25 ([TCDS 2A10](https://openairdocs.org/tcds/2A10))
- Lavia Argentina S.A. (Laviasa) PA-25-235 ([TCDS 2A10](https://openairdocs.org/tcds/2A10))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA1933CE This certificate issued to: Petersen Aviation, Inc.

Route 1, P.O. Box 18 Minden, Nebraska 68959 Part 8 of the Civil Air Regulations.

Original Product -Type Certificate Number: 2A10 Make: Piper Model: PA-25 and PA-25-235 (restricted category) Description of Type Design Change: Operation of airplane on unleaded autamotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index (RON + MON) /2 per ASIM Specification D-439. Intermixing with aviation gasoline also approved. DATA REQUIRED:

Petersen Drawing List Piper Pawnee PA-25 and PA-25-235 dated December 12, 1983, or later FAA Approved revision.

Limitations and Conditions: Limited to those airplanes equipped with gravity fue. teed to the carburetor and certificated (original or SIC) or FAA Field Approved engine installations.

All engines must have separate approval for operation on automotive gasoline in the form of Supplemental Type Certificate approval. This approval should not be extended to other specific airplanes on which other previously approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of the airplanes.

Date of Application: November 6, 1983 Sule wissued:

Date of Issuance: January 4, 1984 Vale wended: March 26, 1984, June 23, 1992 FEDERAL AVIATION By Direction of the Administrator Hayd a Sudas (Signature ) TAMINISTRAIO • Lawrence A. Herron, Manager Wichita Aircraft Certification Office (Title)

47.

## Every issue (1)

- June 23, 1992: Amended, Current. [certificate](https://openairdocs.org/files/sha256/ff/c1/ffc13519104702333529ac7726d16d2fa5a9d40bc49a6098751f163e24ec4ec8)

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