# STC SE21WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: GE Engine Services-Corporate Aviation Inc.
DBA Garrett Aviation Services, United States
- Description: Installation of Turbosupercharger 406610-3.
- Applied: February 24, 1965
- Status date: April 9, 2003
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1E4](https://openairdocs.org/tcds/1E4)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/77DC46537A27EB2486256D8E004AF7BE.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE21WE

## 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 (3)

- Textron Lycoming AVCO Corporation IO-540-C1B5 ([TCDS 1E4](https://openairdocs.org/tcds/1E4))
- Textron Lycoming AVCO Corporation IO-540-C1C5 ([TCDS 1E4](https://openairdocs.org/tcds/1E4))
- Textron Lycoming AVCO Corporation IO-540-C4B5 ([TCDS 1E4](https://openairdocs.org/tcds/1E4))

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