# STC SA3300NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Wiley's Seaplanes, United States
- Description: Use of unleaded automobile gasoline, 87 minimum antiknock and 88 minimum antiknock index leaded automobile gasoline.
- Applied: July 24, 1985
- Status date: November 5, 1985
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-768](https://openairdocs.org/tcds/A-768), [TCDS 5A2](https://openairdocs.org/tcds/5A2)
- Certificate PDF: https://openairdocs.org/files/sha256/84/9f/849f599250ed6d2b453e697ba97c3f87062599dbc7834564a5290ea00c43e642
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C4AA40CECBF03A1885256CC2000A9694.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3300NM

## ADs that name it (0)

None.

## Approved models (3)

- Cessna Aircraft Company 120 ([TCDS A-768](https://openairdocs.org/tcds/A-768))
- Cessna Aircraft Company 140 ([TCDS A-768](https://openairdocs.org/tcds/A-768))
- Cessna Aircraft Company 140A ([TCDS 5A2](https://openairdocs.org/tcds/5A2))

## 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: SA3300KM This certificate issued to: Wiley's Seaplanes Part 3 & 4a of the Civi I Air Regulations:

Original Product - Type bertificale Number: A-768* 5A2* Make: Cessna Cessna Model: 120 & 140 140A Description of Type Design Change: Modify aircraft to fly on unleaded automobile gasoline, 87 minimum antiknock index, and leaded automobile gasoline, 88 minimum antiknock index, per ASTM Specification D-439. Intermixing the above fuels with approved aviation gasoline is also approved. This STC must be used in concurrence with engine STC SE2035CE or SE2036CE and airframe STC SA2096CE or SA2100CE, as appropriate.

*NOTE: This approval is limited to the above aircraft which have been modified in accordance with STC SA4-640 or Item #109 of Aircraft Sepcification A-768.

Limitations and Conditions: Approval of this change in type design applies to the above models of aircraft only. This approval should not be extended to aircraft of these models on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate and FAA Flight Manual Supplement dated November 5, 1985, or later FAA approved revision, These peasant he sues Ping at where heat preppes shal remain need unitsur These beatind test sling at theis heret proposal remainin fed unitsur rendered, suspended, revoked, or a termination date is otherwise established by the Sidministraton of the Federal Aviation Administration .

Date of Application: July 24, 1985 Date Reissued:

Date of Issuance: . November 5, 1985 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Hellat (Signature) TAMIN STRANDS Manager, Seattle Aricraft Certification Office (Title)

47.

## Every issue (1)

- November 5, 1985: Issued, Current. [certificate](https://openairdocs.org/files/sha256/84/9f/849f599250ed6d2b453e697ba97c3f87062599dbc7834564a5290ea00c43e642)

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