# STC SE639SW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aircraft Engine Service Inc, United States
- Description: Continental W-670 link rods.
- Status date: January 1, 1960
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS E-237](https://openairdocs.org/tcds/E-237)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/44E9FEDB485FE7EE862570D2006C878C.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SE639SW

## ADs that name it (0)

None.

## Approved models (3)

- Jacobs Service Company R-755A Series ([TCDS E-237](https://openairdocs.org/tcds/E-237))
- Jacobs Service Company R-755B Series ([TCDS E-237](https://openairdocs.org/tcds/E-237))
- Jacobs Service Company R-755E ([TCDS E-237](https://openairdocs.org/tcds/E-237))

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