# STC SE01949AT

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: K-Aero, United States
- Description: Engine modification to convert Lycoming model O-540-D4A5 and install engine turbonormalization systme which includes 2 ea. Rotomaster model 30T5FF10J2 turbochargers (part number 600572-00) and 1 ea. Harrison Intercooler (part number KA-128).
- Status date: July 12, 1999
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS E-295](https://openairdocs.org/tcds/E-295)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9905D91A0F02CBEA85256CC2005A73EE.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE01949AT

## ADs that name it (1)

- [AD 2002-19-03](https://openairdocs.org/ad/2002-19-03): Crankshaft · Lycoming Engines IO-540-A1A5, IO-540-AA1A5, IO-540-AA1B5 and 81 more. Effective Sep 20, 2002. Named in the applicability

## Approved models (1)

- Textron Lycoming AVCO Corporation O-540-E4A5 ([TCDS E-295](https://openairdocs.org/tcds/E-295))

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