# STC SE978NW

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Machen Inc, United States
- Description: Installation of a Garrett AiResearch Model  T18A21 or T18A95 turbocharger with Machen Inc intercooler and associated systems.
- Applied: July 8, 1980
- Status date: November 1, 1998
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS E14EA](https://openairdocs.org/tcds/E14EA)
- Certificate PDF: https://openairdocs.org/files/sha256/f5/fc/f5fcbe145a9c6f9472c4de7f9d18892d887cb771105e0bdec239523b037570b7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0E7B1B1BCA9C274785256CC2005C2D98.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE978NW

## ADs that name it (0)

None.

## Approved models (2)

- Lycoming Engines LTIO-540-J2BD ([TCDS E14EA](https://openairdocs.org/tcds/E14EA))
- Lycoming Engines TIO-540-J2BD ([TCDS E14EA](https://openairdocs.org/tcds/E14EA))

## What the certificate says

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

## Every issue (1)

- November 1, 1998: Amended, Current. [certificate](https://openairdocs.org/files/sha256/f5/fc/f5fcbe145a9c6f9472c4de7f9d18892d887cb771105e0bdec239523b037570b7)

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