# STC SA12386AK

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Momentum Aeronautics Holdings, LLC, United States
- Description: Increase of the engine power of the PT6A-67F engine to 1600 SHP for takeoff power and 1550 SHP for maximum continuous power
- Status date: June 9, 2026
- Product: Aircraft, Small Airplane
- Certification basis: Part 23
- Data sheets: [TCDS A19SW](https://openairdocs.org/tcds/A19SW)
- Certificate PDF: https://openairdocs.org/files/sha256/61/20/612014c4c24abde90d11bf4e28b74f90e2a0d9e2393da7da4dcd2ede01537d9b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181914259120260611150133.0001
- DRS record last changed: June 11, 2026
- Page: https://openairdocs.org/stc/SA12386AK

## ADs that name it (0)

None.

## Approved models (2)

- Air Tractor Inc. AT-802 ([TCDS A19SW](https://openairdocs.org/tcds/A19SW))
- Air Tractor Inc. AT-802A ([TCDS A19SW](https://openairdocs.org/tcds/A19SW))

## 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: SA12386AK

Part 23 of the Federal Aviation Regulations.

Original Product Type Certificate Number: A19SW Make: Air Tractor Inc.

Model: AT-802, AT-802A

Date of Application: December 11, 2025 Date Reissued:

Date of Issuance: June 9, 2026 Date Amended:

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

Momentum Aeronautics Holdings, LLC 500 L Street, Suite 200 Anchorage, AK 99501 Increase of the engine power of the PT6A-67F engine to 1600 SHP for takeoff power and 1550 SHP for maximum continuous power in accordance with “Modification Instructions and Instructions for Continued Airworthiness AT-802 and AT-802A Engine Power Increase,” Doc. No. 71-631-24-01, Revision A, dated January 26, 2026, or later FAA approved revision.

1) Compatibility of this design change with previously approved modifications must be determined by the installer.

2) Aircraft must be equipped with a Pratt & Whitney PT6A-67F engine.

3) FAA approved Airplane Flight Manual Supplement (AFMS) Doc. No. 71-631-25-01, Revision IR, dated May 13, 2026, or later FAA approved revisions, is a required part of this engine power increase.

4) The aircraft must be maintained with “Modification Instructions and Instructions for Continued Airworthiness AT-802 and AT-802A Engine Power Increase,” Doc. No. 71-631-24-01, Revision A, dated January 26, 2026, or later FAA accepted revision.

Number: SA12386AK Effective Date: June 9, 2026

Transfer Endorsement Transfer the ownership of Supplemental Type Certificate Number: SA12386AK

## Every issue (1)

- June 9, 2026: Issued, Current. [certificate](https://openairdocs.org/files/sha256/61/20/612014c4c24abde90d11bf4e28b74f90e2a0d9e2393da7da4dcd2ede01537d9b)

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