# STC SE3552NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Johnston Aircraft Svc, Inc, United States
- Description: Modification of crankshaft damper configuration.
- Status date: December 10, 1986
- 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/56273DC750B726B285256CC2005A752D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE3552NM

## ADs that name it (0)

None.

## Approved models (5)

- Textron Lycoming AVCO Corporation O-540-A1A ([TCDS E-295](https://openairdocs.org/tcds/E-295))
- Textron Lycoming AVCO Corporation O-540-A1A5 ([TCDS E-295](https://openairdocs.org/tcds/E-295))
- Textron Lycoming AVCO Corporation O-540-A1B5 ([TCDS E-295](https://openairdocs.org/tcds/E-295))
- Textron Lycoming AVCO Corporation O-540-A1C5 ([TCDS E-295](https://openairdocs.org/tcds/E-295))
- Textron Lycoming AVCO Corporation O-540-A1D5 ([TCDS E-295](https://openairdocs.org/tcds/E-295))

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