# STC SE11095SC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: R.T. Turbines, Inc., United States
- Description: The conversion of the Pratt & Whitney Canada, Model PT6A-27 to a PT6A-34 turboprop engine
- Applied: November 9, 2011
- Status date: December 11, 2012
- Product: Engine, Rotorcraft
- Certification basis: Part 21, Part 33
- Data sheets: [TCDS E4EA](https://openairdocs.org/tcds/E4EA)
- Certificate PDF: https://openairdocs.org/files/sha256/e1/f3/e1f31e1a706a10e66f5ec4c4631eb508d4250992915a1c5303e83b3d3e932147
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FD6E183CBCFFC0A286257AE20063E8EB.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE11095SC

## ADs that name it (0)

None.

## Approved models (1)

- Pratt & Whitney Canada Corp. PT6A-27 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Part 33 of the Federal Aviation Regulations.

Description of Type Design Change: The conversion of the Pratt & Whitney Canada, Model PT6A-27 to a PT6A-34 turboprop engine in accordance with R.T. Turbines “Technical Instruction #RTT-02-01” dated November 21, 2011, or later FAA approved version. The installation of second engine data plate R.T. Turbines Inc., Drawing No. STC 002, “Supplemental Data Plate”, dated February 7, 2011, is also required.

Limitations and Conditions: The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. The R.T. Turbines Inc, “Instructions for Continued Airworthiness Manual”, dated November 21, 2011, or later FAA approved versions is required. The engine parts used for modification will be inspected and found to be airworthy in accordance with the Pratt & Whitney Canada, Overhaul Manual for the Model PT6A-27 and PT6A-34 engines. Conversion of a previously STC converted engine is not authorized.

R.T. Turbines, Inc.

3397 Hwy 121 W.

Marianna, AR 72360 E4EA Make : Pratt & Whitney Canada Model : PT6A-27 Date of application: November 9, 2011

Date of issuance: December 11, 2012

( Signature) S. Frances Cox Manager, Special Certification Office Southwest Region

( Title)

FAA Form 8110-2-1(10-69) Page 2 of 2

## Every issue (1)

- December 11, 2012: Issued, Current. [certificate](https://openairdocs.org/files/sha256/e1/f3/e1f31e1a706a10e66f5ec4c4631eb508d4250992915a1c5303e83b3d3e932147)

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