# STC SA01284WI

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: MT- Propeller Entwicklung GmbH, Germany
- Description: Installation of MT-Propeller Model MTV-14-D-C-F/CF188-30g hydraulic 4-blade variable pitch propeller.
- Applied: October 21, 2003
- Status date: March 20, 2007
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 3A25](https://openairdocs.org/tcds/3A25)
- Certificate PDF: https://openairdocs.org/files/sha256/25/68/25682890f44743fb9310b4f384f0433733f7353221b2935697bdd6538119acf8
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/285A56045AB784138625738A0070D0E4.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA01284WI

## ADs that name it (0)

None.

## Approved models (2)

- The Cessna Aircraft Company 340 ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- The Cessna Aircraft Company 340A ([TCDS 3A25](https://openairdocs.org/tcds/3A25))

## 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.

This certificate issued to: MT-Propeller Entwicklung GmbH Airport Wallmuehle Flugplatzstr. 1 D-94348 Atting, Germany

Part 3 of the Civil Air Regulations. Luftfahrt-Bundesamt (LBA) originally certificated this modification under German LBA EMZ (STC) No. SA 1347. The FAA validated this modification under U.S. Supplement Type Certificate No. SA01284WI. Effective September 28, 2003, the European Aviation Safety Agency (EASA) began oversight of this modification on behalf of Luftfahrt- Bundesamt.

Original Product - Type Certificate Number : 3A25 Make : Cessna Model : 340, 340A

Description of Type Design Change: Installation of MT-Propeller Model MTV-14-D-C-F/CF188-30g hydraulic 4- blade variable pitch propeller. This modification would also include 340s modified with STC SA2346SW and 340As modified with STC SA4241SW. Data Required: (1) Installation instructions E-977 with an FAA Approval date of November 23, 2004; and (2) FAA Approved Airplane Flight Manual Supplement (AFMS) E- 976 dated November 23, 2004; or later FAA approved revisions to (1) or (2).

Limitations and Conditions: Compatibility of this design change with previously approved modifications must be determined by the installer. 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.

This STC is not to be transferred since its issuance was in accordance with 14 CFR 21.29 and is based upon a validation of the German LBA EMZ No. SA 1347.

Date of application : October 21, 2003 Date reissued : March 20, 2007

Original signed by Eual Conditt

( Signature) Eual M. Conditt, Jr.

Associate ACO Manager, Airframe & Services Wichita Aircraft Certification Office (Title)

Date of issuance : November 23, 2004

## Every issue (2)

- March 20, 2007: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/25/68/25682890f44743fb9310b4f384f0433733f7353221b2935697bdd6538119acf8)
- November 23, 2004: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/60/32/6032bcfa8d7f1c0eb2bb65b392ba4168cbe9390c07465878bb23c39c7e4a92ac)

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