# STC SA2691WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: RPM Commander LLC, United States
- Description: Installation of Lycoming IO-720-B1B or B1BD turbocharged engine
- Applied: May 10, 1973
- Status date: April 16, 2008
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4), [TCDS 6A1](https://openairdocs.org/tcds/6A1)
- Certificate PDF: https://openairdocs.org/files/sha256/5e/cb/5ecbfec17c8b6c0977de6f9b05373c1769278b10b20d87692243e46f2d8c5cf3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/49E252CDBF2558508625743A00521DBE.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2691WE

## ADs that name it (2)

- [AD 2005-18-20](https://openairdocs.org/ad/2005-18-20): "FASTprop" propeller de-icers · Hartzell PHC-C3YF-1RF/F8468A(B,K)-8R constant speed propeller (STC SA00718LA or 17 others). Effective Oct 14, 2005. Named in the applicability
- [AD 79-12-07](https://openairdocs.org/ad/79-12-07): Magnetos · Bendix Magnetos, TIO-540-F2BD, TIO-540-N2BD and 3 more. Effective Jun 19, 1979. Cited in the text

## Approved models (3)

- Twin Commander Aircraft Corporation 500-S ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 560-F ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft Corporation 680-F ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

## What the certificate says

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

## Every issue (2)

- April 16, 2008: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/5e/cb/5ecbfec17c8b6c0977de6f9b05373c1769278b10b20d87692243e46f2d8c5cf3)
- January 30, 2006: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/51/6a/516a4385777c175b848c55629ff9c7058d97008acacd6c31702eed8349b9ed68)

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