# STC SA12066IB - Type: Supplemental type certificate - Status: Current, Issued - Holder: MT-Propeller Entwicklung GmbH, Germany - Description: Installation of the MT-Propeller Entwicklung GmbH model MTV-21-A/170-05 propeller - Applied: October 10, 2024 - Status date: July 22, 2025 - Product: Aircraft, Small Airplane - Certification basis: Part 23 - Data sheets: [TCDS TA4CH](https://openairdocs.org/tcds/TA4CH), [TCDS A74EU](https://openairdocs.org/tcds/A74EU) - Certificate PDF: https://openairdocs.org/files/sha256/71/17/7117b5a8edcd0c32d6dcad5a88b9b2f039662402b36f877e0b103e83274b3483 - Approved model list and other attachments: [SA12066IB_AML.pdf](https://openairdocs.org/files/sha256/94/05/9405d8339aa75ea4912fbd48b325f927f34781fcac74623f040708e32812ae0d) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID132550804020250722204106.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA12066IB ## ADs that name it (0) None. ## Approved models (2) - Diamond Aircraft Industries Inc DA20-A1 ([TCDS TA4CH](https://openairdocs.org/tcds/TA4CH)) - HOAC-Austria DV 20 Katana ([TCDS A74EU](https://openairdocs.org/tcds/A74EU)) ## 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. IMPORT SA12066IB MT-Propeller Entwicklung GmbH Flugplatzstrasse 1 94348 Atting Germany Part 23 Title 14 Code of Federal Regulations *See attached FAA Approved Model List (AML) No. SA12066IB *See attached FAA AML No. SA12066IB *See attached FAA AML No. SA12066IB 1. Installation of the MT-Propeller Entwicklung GmbH model MTV-21-A/170-05 propeller must be done in accordance with the MT-Propeller Entwicklung GmbH Master Documentation List (MDL) and Installation Instructions shown on the attached Federal Aviation Administration (FAA) Approved Model List (AML) No. SA12066IB, or later European Union Aviation Safety Agency (EASA) accepted revisions. 1. The installer must determine whether this design change is compatible with previously approved modifications. (See continuation sheet 3) October 10, 2024 July 22, 2025 John Yoo Manager, International Validation Branch Compliance & Airworthiness Division Aircraft Certification Service 3 **IMPORT SA12066IB 3** IMPORT SA12066IB Date Issued: July 22, 2025 Description of Type Design Change (continued): 2. Maintenance must be in accordance with the MT-Propeller Entwicklung GmbH Instructions for Continued Airworthiness shown on the attached FAA AML No. SA12066IB, or later EASA accepted revisions. 3. Operations must be in accordance with the MT-Propeller Entwicklung GmbH Aircraft Flight Manual Supplement shown on the attached FAA AML No. SA12066IB, or later EASA approved revisions. 2. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission. 3. This Supplemental Type Certificate (STC) is applicable to all serial numbers for the Makes-Models shown on the attached FAA AML No. SA12066IB. 4. Operate in accordance with the Limitations section of the Aircraft Flight Manual Supplement shown on the attached FAA AML No. SA12066IB. 5. This modification is only for the Diamond Aircraft Industries Inc. DA20-A1 aircraft and HOAC-Austria DV 20 KATANA aircraft that have either the Rotax 912 A3 or Rotax 912 F3 engines installed. Certification Basis Based on Title 14 Code of Federal Regulations (CFR) 21.115 and 21.101, and the FAA policy for design changes that are identified as not significant in FAA Order 8110.48, the type certification basis for the modified Diamond Aircraft Industries Inc. DA20-A1 aircraft is as shown in Type Certificate Data Sheet (TCDS) TA4CH and for the HOAC-Austria DV 20 KATANA aircraft is as shown in TCDS A74EU plus the following for both aircraft: • 14 CFR Part 36 at Amendment 36-32. ----------END---------- 3 3 ### SA12066IB_AML.pdf FAA APPROVED MODEL LIST (AML) STC No. SA12066IB MT-PROPELLER ENTWICKLUNG GmbH FOR INSTALLATION OF THE MTV-21-A/170-05 PROPELLER 1 | Page Date Issued: July 22, 2025 Date Reissued: N/A **ITEM MAKE MODEL SERIES CERT BASIS FAA TCDS** **REQUIRED DOCUMENTATION** **INITIAL** **APPROVAL DATE** **AMENDED DATE MASTER** **DOCUMENTATION** **LIST (MDL)** **INSTALLATION** **INSTRUCTIONS** **INSTRUCTIONS** **FOR CONTINUED** **AIRWORTHINESS (ICA)** **AIRCRAFT FLIGHT MANUAL** SUPPLEMENT (AFMS) 1 Diamond Aircraft Industries Inc. DA20-A1 See STC SA12066IB, Certification Basis section TA4CH MT-Propeller Entwicklung GmbH Master Documentation List, doc # E-4108, Revision 3, dated March 10, 2025 MT-Propeller Entwicklung GmbH Installation Instructions, doc # E-4111, Revision 2, dated November 11, 2024 MT-Propeller Entwicklung GmbH Instructions for Continued Airworthiness, doc # E-4112, Revision 1, dated November 11, 2024 MT-Propeller Entwicklung GmbH Aircraft Flight Manual Supplement, doc # E-4110, Revision 3, dated March 10, 2025 July 22, 2025 N/A 2 HOAC-Austria DV 20 KATANA See STC SA12066IB, Certification Basis section A74EU FAA Approved: ________________________________ John Yoo Manager, International Validation Branch Compliance & Airworthiness Division Aircraft Certification Service ## Every issue (1) - July 22, 2025: Issued, Current. [certificate](https://openairdocs.org/files/sha256/71/17/7117b5a8edcd0c32d6dcad5a88b9b2f039662402b36f877e0b103e83274b3483), [SA12066IB_AML.pdf](https://openairdocs.org/files/sha256/94/05/9405d8339aa75ea4912fbd48b325f927f34781fcac74623f040708e32812ae0d) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.