# STC SA12478AK

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Momentum Aeronautics Holdings, LLC, United States
- Description: Installation of Hartzell Engine Technologies (HET) ALT-FLX Alternators i
- Applied: July 18, 2025
- Status date: October 9, 2026
- Product: Aircraft, Small Airplane
- Certification basis: Part 23
- Data sheets: [TCDS A00076CE](https://openairdocs.org/tcds/A00076CE)
- Certificate PDF: https://openairdocs.org/files/sha256/23/37/2337b9da13f104220bc560422ce1a95ca07b9acdff3d2fed8f3fa24a4a6e1387
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151264665220261014145022.0001
- DRS record last changed: October 14, 2026
- Page: https://openairdocs.org/stc/SA12478AK

## ADs that name it (0)

None.

## Approved models (1)

- Costruzioni Aeronautiche Tecnam S.P.A. P2012 Traveller ([TCDS A00076CE](https://openairdocs.org/tcds/A00076CE))

## 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 may be transferred or made available to third persons by licensing agreements in accordance with 14 CFR 21. 47.

FAA Form 8110-2 (03/21) Page 1 of 2 Number: SA12478AK This certificate issued to: Momentum Aeronautics Holdings, LLC 500 L Street, Suite 200 Anchorage, AK 99501

Original Product Type Certificate Number: A00076CE

Installation of Hartzell Engine Technologies (HET) ALT-FLX Alternators in accordance with ALT-FLX Aircraft Alternator Installation & Instructions for Continued Airworthiness (ICA), Drawing No. 17-1002, Rev.

New: 9/22/2026, or later FAA approved revision.

1. The ALT-FLX Alternator installation is only valid for airplanes with the Lycoming TEO-540-C1A engines.

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

3. A copy of this Certificate must be maintained as part of the permanent records for the modified aircraft.

4. The modified aircraft must be maintained in accordance with ALT-FLX Aircraft Alternator Installation & Instructions for Continued Airworthiness (ICA), Drawing No. 17-1002, Rev. New: 9/22/2026, or later FAA accepted revision.

Date of Application: July 18, 2025

Date of Issuance: October 9, 2026 Date Reissued:

for Gregory S. DiLibero Title: Manager, West Certification Branch

Part 23 of Federal Aviation Regulations.

Costruzioni Aeronautiche Tecnam S.P.A.

P2012 Traveller

Number: SA12478AK Effective Date: October 9, 2026

Transfer Endorsement Transfer the ownership of Supplemental Type Certificate Number: SA12478AK

## Every issue (1)

- October 9, 2026: Issued, Current. [certificate](https://openairdocs.org/files/sha256/23/37/2337b9da13f104220bc560422ce1a95ca07b9acdff3d2fed8f3fa24a4a6e1387)

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