# STC SE792NW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: 4J's Aviation, United States
- Description: Modification of a Lycoming0-235-L2C, or 0-235-L2A engine to increase HP rating from 115-HP at 2700 rpm to a continuous125 HP at 2800 rpm.
- Applied: June 26, 1979
- Status date: July 26, 2019
- Product: Engine
- Certification basis: Part 13, Part 21
- Data sheets: [TCDS E-223](https://openairdocs.org/tcds/E-223)
- Certificate PDF: https://openairdocs.org/files/sha256/65/c0/65c07baae87f28b62abeb218fab02818b19c37a600afaabd773130702001b467
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/44BC0A210E08A1BE862585DE003B8654.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE792NW

## ADs that name it (0)

None.

## Approved models (2)

- Lycoming Engines O-235-L2A ([TCDS E-223](https://openairdocs.org/tcds/E-223))
- Lycoming Engines O-235-L2C ([TCDS E-223](https://openairdocs.org/tcds/E-223))

## 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.

Number SE792NW

This certificate, issued to 4J’s Aviation 661 Crawford Avenue Delta, CO 81416

Part 13 of the Civil Air Regulations, dated June 15, 1956 as amended by 13-1, 13-2, and 13-3 Original ProductType Certificate Number: E-223 Make: Lycoming Model: 0-235-L2C/L2A

Description of the Type Design Change: Modification of a Lycoming 0-235-L2C or 0-235-L2A engine to increase horsepower rating from 15 HP @ 2700 rpm to a continuous 125 HP @ 2800 RPM in accordance with Kennis B. Blackman Installation Instructions KB 1250.

NOTE: The modified engine shall be designated as 0-235-L2C(M) or 0-235-L2A(M).

Limitations and Conditions: Approval of this change in type design applies to the above model engine only.

This approval should not be extended to other engines of this model unless the installer determines that the relationship between this change and any other previously incorporated approved modifications will introduce no adverse effect upon the airworthiness of that engine. A copy of this certificate, and Addendum, must be maintained as part of the permanent records of the modified engine.

If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of application: June 26, 1979 Date reissued: July 26, 2019 Date of issuance: June 28, 1979 Date amended: February 19, 1987

FAA FORM 8110-2 (5/14) PAGE 1 OF 3 PAGES By direction of the Administrator

(Signature)

Acting Manager, Seattle ACO Branch (Title)

Transfer the ownership of Supplemental Type Certificate Number

to (Name of Transferee)

(Address of Transferee)

(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)

Signature of Grantor (In Ink):

U.S. GPO: 1987-763-289

United States of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SE792NW Number SE792NW

The conditions and limitations of Type Certificate Data Sheet E-223 apply except where superseded by the following:

This Supplemental Type Certificate Data Sheet, which is part of STC SE792NW, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Civil Air Regulations:

SUPPLEENTAL TYPE CERTIFICATE HOLDER: 4J’s Aviation

Engine: Lycoming 0-235-L2C (Modified) /-L2A (Modified) Fuel: 100/130 minimum grade aviation gasoline Engine Limits: For all operations, 2800 RPM (125 HP) Compression Ratio: 9.7:1 Placards: Placards and Operating Limitations on Type Certificate Data Sheet E-223 apply Except as noted herein:

a. Original Engine Data Plate:

Add a “suffix” (M) and the STC number to the model designation as follows:

b. Supplemental Engine Data Plate:

Install a Supplemental Data Plate adjacent to the original Data Plate to read as follows:

- END -

**FAA FORM 8110-2 (5/14) PAGE 3 OF 3 PAGES**

MODEL: 0-235-L2C(M) STC SE792NW

**AVCO LYCOMING ENGINE**

**SUPPLEMENTAL DATA PLATE STC SE792NW**

- TAKEOFF (5 MIN) 125 HP @ 2800 RPM

- NORMAL RATED 125 HP @ 2800 RPM

SPARK ADVANCE - 25º BTC

## Every issue (2)

- July 26, 2019: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/65/c0/65c07baae87f28b62abeb218fab02818b19c37a600afaabd773130702001b467)
- February 19, 1987: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/3d/41/3d412a6da520b081e94628ebffb6d4a3cb4059957e4406749c37493c0b9837c0)

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