# STC SE4725NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: General Aviation Concepts, United States
- Description: Installation of an O-3000-A crankshaft, P/N 530860, equipped with an O-3000-D cluster fear, P/N 627846, in an O-3000-D engine.
- Applied: January 25, 1989
- Status date: April 6, 2019
- Product: Engine
- Certification basis: Part 13, Part 21
- Data sheets: [TCDS E-253](https://openairdocs.org/tcds/E-253)
- Certificate PDF: https://openairdocs.org/files/sha256/25/c9/25c9397cee0a54d8dd9e98ae9f38552e8bd14e872d588950b1dd63b67da8a7bb
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/51CAC33F4EFB5BFC86258432005E44DD.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE4725NM

## ADs that name it (0)

None.

## Approved models (1)

- Continental Motors O-300-D ([TCDS E-253](https://openairdocs.org/tcds/E-253))

## 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.

Part 13 of the Civil Aviation Regulations.

Installation of a Teledyne Continental Motors Co. O-300-A crankshaft, P/N 530860, equipped with an O-300-D cluster gear, P/N 627846, in an O-300-D engine. Incorporation of this modification does not alter the O-300-D engine limitations in any way and does not require any modification of or additions to the existing placards. This modification is to permit the installation of propellers requiring an SAE No. 3 propeller flange. No installation data are required.

Note: The O-300-D cluster gear, P/N 627846, must be installed to allow the angle drive starter to engage properly.

1) The installer must determine whether this design change is compatible with previously approved modifications.

2) 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: January 25, 1989

Date of issuance: May 10, 1989

General Aviation Concepts 3033 Taxilane A North Pole, AK 99705 E-253 Teledyne Continental Motors O-300-D Date reissued: April 11, 2018; April 13, 2018;

April 6, 2019 Date amended:

(Signature) August A. Asay Manager, Anchorage ACO Branch

(Title)

## Every issue (3)

- April 6, 2019: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/25/c9/25c9397cee0a54d8dd9e98ae9f38552e8bd14e872d588950b1dd63b67da8a7bb)
- April 13, 2018: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/43/87/438721baaee9414fd43714329dc66c37cf5ab667643ad8d796694c6fb534762b)
- April 11, 2018: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/77/4f/774f9069901164b382e5a813411b4af8dfbca4af588b6b8b579a5cd7e5687850)

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