# STC SA12446AK

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sensenich Propeller Company, United States
- Description: Installation of Sensenich Propeller Company 2G0M8SXX/C76PGF Composite, Ground Adjustable Propeller
- Applied: July 5, 2026
- Status date: September 8, 2026
- Product: Aircraft, Small Airplane
- Data sheets: [TCDS 3A17](https://openairdocs.org/tcds/3A17), [TCDS A-799](https://openairdocs.org/tcds/A-799)
- Certificate PDF: https://openairdocs.org/files/sha256/fe/f9/fef93b78a0c76507427e0f2a1f50fedc838b32be95eb8956a4fa62c64f235a1a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID106468875420261022195507.0001
- DRS record last changed: October 22, 2026
- Page: https://openairdocs.org/stc/SA12446AK

## ADs that name it (0)

None.

## Approved models (8)

- Textron Aviation Inc. 170 ([TCDS A-799](https://openairdocs.org/tcds/A-799))
- Textron Aviation Inc. 170A ([TCDS A-799](https://openairdocs.org/tcds/A-799))
- Textron Aviation Inc. 170B ([TCDS A-799](https://openairdocs.org/tcds/A-799))
- Textron Aviation Inc. 175 ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Textron Aviation Inc. 175A ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Textron Aviation Inc. 175B ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Textron Aviation Inc. 175C ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Textron Aviation Inc. P172D ([TCDS 3A17](https://openairdocs.org/tcds/3A17))

## 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.

Number: SA12446AK

Part 3 of The Civil Air Regulations.

Original Product Make Type Certificate Number: * Model:

* Refer to FAA Approved Model List (AML), No. SA12446AK, dated September 8, 2026, or later FAA approved revision.

Date of Application: July 5, 2026

Date Reissued: September 24, 2026 Date of Issuance: September 8, 2026 Date Amended:

Title: for Gregory S. DiLibero Manager, West Certification Branch Sensenich Propeller Company 2008 Wood Court Plant City, FL 33563 Installation of Sensenich Propeller Company 2G0M8SXX/C76PGF Composite, Ground Adjustable Propeller in accordance with Sensenich Propellers “Sensenich Two Blade Composite Aircraft Propeller Installation and Operation Instructions for Cessna 170, 170A, 170B, 175, 175A, 175B, 175C, and P172D Aircraft With Lycoming O-360 or IO-360 Engines”, Doc. No. 170-2G0M8-IM, Rev. 0 dated July 4, 2026 or later FAA approved revision.

1. The installer must determine whether this design is compatible with previously approved modifications.

2. This STC is valid only for aircraft models that previously had a Lycoming O-360 series engine, TCDS E-286 or Lycoming IO-360 series engine, TCDS 1E10, installed by a previous FAA approved installation procedure.

3. Installation shall be maintained in accordance with Sensenich Propellers “Instructions for Continued Airworthiness Manual G-Shank Series Composite Ground Adjustable Propellers” Doc. No. SICA-G_20020214, Rev 0, dated April 7, 2022, or later FAA accepted revision.

4. “Supplemental Airplane Flight Manual/Airplane Flight Manual Supplement” Doc. No. 170-2G0M8-AFMS, Rev IR, dated August 27, 2026, or later FAA approved revision is a required part of this installation.

Number: SA12446AK Effective Date: September 24, 2026

Transfer Endorsement Transfer the ownership of Supplemental Type Certificate Number: SA12446AK

## Every issue (2)

- September 8, 2026: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/fe/f9/fef93b78a0c76507427e0f2a1f50fedc838b32be95eb8956a4fa62c64f235a1a)
- September 8, 2026: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/f2/84/f284236ef9ac40bf4947990d2f0735783fa20db88c3ba42cf149d3b10e9c03e9), [SA12446AK_AML.pdf](https://openairdocs.org/files/sha256/43/0f/430f01d30ce8834695b5bce67f5316f92702cf67f87c1f4ff04f81becd4e1397)

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