# STC SA12204WI - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Air Tractor Inc., United States - Description: Wing Spar Cap manufacturing process change - Applied: August 23, 2024 - Status date: February 27, 2026 - Product: Aircraft, Small Airplane - Certification basis: Part 23 - Data sheets: [TCDS A9SW](https://openairdocs.org/tcds/A9SW), [TCDS A17SW](https://openairdocs.org/tcds/A17SW), [TCDS A19SW](https://openairdocs.org/tcds/A19SW) - Certificate PDF: https://openairdocs.org/files/sha256/43/c1/43c1eb1ed2dfb4818a130ba9b920d0364a090e4ddf28ddbe869e96b30c06871d - Approved model list and other attachments: [SA12204WI_AML.pdf](https://openairdocs.org/files/sha256/18/22/18221b7bbb44442909e4e71fead659c793827159df35c3f7daa88456c08e8920) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID182983979120260319154349.0001 - DRS record last changed: March 19, 2026 - Page: https://openairdocs.org/stc/SA12204WI ## ADs that name it (0) None. ## Approved models (18) - Air Tractor Inc. AT-400 ([TCDS A9SW](https://openairdocs.org/tcds/A9SW)) - Air Tractor Inc. AT-400A ([TCDS A9SW](https://openairdocs.org/tcds/A9SW)) - Air Tractor Inc. AT-401 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-401A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-401B ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-402 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-402A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-402B ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-501 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-502 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-502A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-502B ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-503 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-503A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-504 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-602 ([TCDS A19SW](https://openairdocs.org/tcds/A19SW)) - 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. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number This certificate issued to: SA12204WI Air Tractor, Inc. 1524 Leland Snow Way Olney, TX 76374 Part 23 14 CFR *Multiple - AML STC *Multiple - AML STC 1. The installer must determine whether this design change is compatible with previously approved modifications. 2. This STC is applicable to all serial numbers for models listed on AML. 8/23/2024 02/27/2026 02/12/2026 for Mr. Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3 Wing Spar Cap manufacturing process change. Data required: See FAA STC Approved Model List (AML) SA12204WI for all approved makes, models and applicable airworthiness standards. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number Date o transfer: SA12204WI 3 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SA12204WI 02/27/2026 Certification Basis (continued from page 1): In accordance with 14 CFR 21.101 and 21.115, and the procedures specified in FAA Order 8110-48 and FAA AC 21.101, the certification basis for this modification is as follows: 1. The type certification basis for areas not changed or not affected by this modification remain as specified in the applicable TCDS. 2. The certification basis for areas changed or affected by this modification since the date of application, 8/23/2024, was determined to be: For Certification Group 1: For Certification Group 2: Section Amdt. Section Amdt. 23.1 initial 23.1 23-34 23.305 initial 23.305 initial 23.307 initial 23.307 initial 23.572(a)(1) 23-7 23.572(a)(1)(b)(1) 23-38 23.601 initial 23.601 initial 23.603 initial 23.603 23-23 23.605 initial 23.605(a)(b) 23-23 23.627 initial 23.627 initial **23.1529 23-8 23.1529 23-26 --- END --- 3 3** ### SA12204WI_AML.pdf Air Tractor, Inc. FAA Approved Model List (AML) STC No. SA12204WI Wing Spar Cap Manufacturing Process Change FAA Approved: LOG OF REVISIONS Date Description 2/12/2026 Issue Date 2/27/2026 STC Transferred from Aeronautix to Air Tractor, Inc for Mr. Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service Air Tractor, Inc. FAA Approved Model List (AML) STC No. SA12204WI Wing Spar Cap Manufacturing Process Change Issue Date: February 12, 2026 Page 2 Item Aircraft Make Aircraft Model TCDS Certification Basis Master Data List Document No. Revision* / Date Amendment Date 1 Air Tractor AT-400, AT-400A A9SW Part 23, as listed in the TCDS 22-033-DC4301 Rev. 0 2/12/2026 N/A 2 Air Tractor AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B, AT-501, AT-502, AT-502A, AT-502B, AT-503, AT-503A, AT-504 A17SW Part 23, as listed in the TCDS 22-033-DC4301 Rev. 0 2/12/2026 N/A 3 Air Tractor AT-602, AT-802, AT-802A A19SW Part 23, as listed in the TCDS 22-033-DC4301 Rev. 0 2/12/2026 N/A *or later FAA Approved revision ## Every issue (2) - February 27, 2026: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/43/c1/43c1eb1ed2dfb4818a130ba9b920d0364a090e4ddf28ddbe869e96b30c06871d), [SA12204WI_AML.pdf](https://openairdocs.org/files/sha256/18/22/18221b7bbb44442909e4e71fead659c793827159df35c3f7daa88456c08e8920) - February 12, 2026: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/5a/54/5a54cb0795a810b104245b45d81689f4133d6dc93a152c84423983e52abff7ec), [SA12204WI_AML.pdf](https://openairdocs.org/files/sha256/fd/39/fd39410ae027741a89f1b445b576808672a9e645bdc4ba80462b94be2232ba1e) --- 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.