# STC SE1433GL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Kron Howard, United States
- Description: Convert Lycoming aircraft engine Model O-540-B2B5 or O-540-B2C5 rated at 235 hp at 2575 rpm to a
O-540-B2B5-C-AlD5 or O-540-B2C5-C-A1D5 rated at 250 hp at 2575 rpm maximum
- Applied: August 3, 1989
- Status date: November 28, 2001
- Product: Engine
- Data sheets: [TCDS E-295](https://openairdocs.org/tcds/E-295)
- Certificate PDF: https://openairdocs.org/files/sha256/fb/50/fb50bd0dfd5d5aadcc14a29ae1bfe3b09092e7f434296f58dba4f009279b4646
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID177257251320241213153755.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SE1433GL

## ADs that name it (0)

None.

## Approved models (2)

- Textron Lycoming AVCO Corporation O-540-B2B5 ([TCDS E-295](https://openairdocs.org/tcds/E-295))
- Textron Lycoming AVCO Corporation O-540-B2C5 ([TCDS E-295](https://openairdocs.org/tcds/E-295))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- November 28, 2001: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/fb/50/fb50bd0dfd5d5aadcc14a29ae1bfe3b09092e7f434296f58dba4f009279b4646)

---
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.