# STC SA03040CH - Type: Supplemental type certificate - Status: Current, Amended - Holder: Reabe Design LLC, United States - Description: Installation of a digital payload hopper quantity and spray boom pressure indicating system - Applied: April 26, 2011 - Status date: February 1, 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), [TCDS A4SW](https://openairdocs.org/tcds/A4SW) - Certificate PDF: https://openairdocs.org/files/sha256/f6/ec/f6ec013e6447667e0db491a16cd9665a37f02e12e74969a3c7a608ec9c85c7b2 - Approved model list and other attachments: [SA03040CH_ AML.pdf](https://openairdocs.org/files/sha256/78/85/7885f82ead3a3c07ece84d451df0952c05cb85b33d787fa1d9f08fc75cb0c583) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID124701550120260219182344.0001 - DRS record last changed: February 19, 2026 - Page: https://openairdocs.org/stc/SA03040CH ## ADs that name it (0) None. ## Approved models (26) - 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-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-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-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)) - Thrush Aircraft Inc. S2R ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2R-G1 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2R-G10 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2R-G5 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2R-G6 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2R-H80 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2R-T11 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2R-T15 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2R-T34 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2R-T45 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2R-T65 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2R-T660 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2RHG-T34 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) - Thrush Aircraft Inc. S2RHG-T65 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW)) ## 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. SA03040CH Reabe Design LLC 2552 Coreland Ct. DePere, WI 54115 Part * the * . 1. Compatibility of this design change with previously approved modifications must be determined by the installer. 4/26/2011 2/1/2026 12/7/2011 6/1/2012 12/4/2012 4/24/2015 ✔ for Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3 Installation of a digital payload hopper quantity and spray boom pressure indicating system in accordance with Drawing List 6DL, Revision Z, dated 9/8/2018, or later FAA approved revision. *See attached FAA Approved Model List (AML) No. SA03040CH for list of approved airplane models and applicable airworthiness regulations. SA03040CH 02/01/26 3 SA03040CH 02/01/26 Date Amended (continued): 10/11/2018, 02/11/2022 2. A copy of this certificate must be maintained as part of the permanent records for the modified aircraft. 3. 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. ----------------------------------------------------------END---------------------------------------------------- 3 3 Add Page ### SA03040CH_ AML.pdf **FAA APPROVED MODEL LIST (AML) NO. SA03040CH** **REABE DESIGN LLC** **INSTALLING DIGITAL PAYLOAD HOPPER QUANTITY AND SPRAY BOOM PRESSURE INDICATING SYSTEM** Original STC Issue Date: December 7, 2011 **ITEM** **AIRCRAFT MAKE** **AIRCRAFT MODEL** **ORIGINAL TYPE** **CERTIFICATE NUMBER** **CERTIFICATION BASIS FOR** ALTERATION MASTER DRAWING LIST* AFM **SUPPLEMENT** **NUMBER/DATE** AML AMENDMENT DATE NUMBER REVISION NO. & DATE 1 Air Tractor Inc. AT-400, AT- 400A A9SW REV 12 FAR 23 thru Amend 23-49 6DL Rev. T Dated 9/23/14 N/A 4/24/2015 2 Air Tractor Inc. AT-402, AT- 402A, AT-402B A17SW REV 13 FAR 23 thru Amend 23-49 6DL Rev. T Dated 9/23/14 N/A 4/24/2015 3 Air Tractor Inc. AT-502, AT- 502A, AT-502B, AT-504 A17SW REV 13 FAR 23 thru Amend 23-49 6DL Rev. T Dated 9/23/14 N/A 4/24/2015 4 Air Tractor Inc. AT-602 A19SW REV 10 FAR 23 thru Amend 23-49 6DL Rev. T Dated 9/23/14 N/A 4/24/2015 5 Air Tractor Inc. AT-802, AT- 802A A19SW REV 10 FAR 23 thru Amend 23-49 6DL Rev. T Dated 9/23/14 N/A 4/24/2015 6 Thrush S2R, S2R-G1, S2R-S2R-G5, S2R-G6, S2R- G10, S2R-H80, S2R-T15, S2R- T11, S2R-T34, S2R-T45, S2R- T65, S2RHG- T34, S2RHG- T65, S2R-510 A4SW FAR 23 thru Amend 23-49 6DL Rev. AG Dated 6/15/22 N/A 9/15/2022 7 Thrush S2R-T660 A4SW REV 38 FAR 23 thru Amend 23-53 6DL Rev. Z Dated 9/8/18 N/A 10/11/2018 8 Air Tractor Inc. AT-401, AT- 401A, AT-401B A17SW REV 15 FAR 23 thru Amend 23-59 6DL Rev. AF Dated 12/21/21 N/A 2/11/2022 * Or later FAA approved revisions. FAA Approved: _____________________________ for Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service Amended: 4/24/2015, 12/4/2015, 10/11/2018, 2/11/2022, 9/15/2022 Reissued: 02/1/2026 ## Every issue (6) - February 1, 2026: Amended, Current. [certificate](https://openairdocs.org/files/sha256/f6/ec/f6ec013e6447667e0db491a16cd9665a37f02e12e74969a3c7a608ec9c85c7b2), [SA03040CH_ AML.pdf](https://openairdocs.org/files/sha256/78/85/7885f82ead3a3c07ece84d451df0952c05cb85b33d787fa1d9f08fc75cb0c583) - February 11, 2022: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/72/0f/720fe96979ae3f5b897fff8ea245ebee5892597184412bea74edcf692df3f794), [AML SA03040CH.pdf](https://openairdocs.org/files/sha256/98/f6/98f61a09987214c3ad51fa0ee38a2f4b133a75264fdf5176c9a8bd6e05954b02) - October 11, 2018: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/b3/8c/b38c7988bbfe6d9b1ecbf171b56f8f4a3d194b2964f42c02873a6a542e04af9f), [SA03040CH_AML.pdf](https://openairdocs.org/files/sha256/52/d4/52d4e30eadfbedc6757258684e6eaddd657e6d29d9b897d89bc4ef82cdec4bf2) - December 4, 2015: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/18/fc/18fcaacdc8b328d7e439b57ea224da714b48f969a20913599ab3efe41d906f6e), [SA03040CH_AML.pdf](https://openairdocs.org/files/sha256/7c/a4/7ca4a598bf127bce45f0fc1fbec81e9b7d44f171c9e62ea154eacf248b8ff02e) - April 24, 2015: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/18/fc/18fcaacdc8b328d7e439b57ea224da714b48f969a20913599ab3efe41d906f6e), [SA03040CH_AML.pdf](https://openairdocs.org/files/sha256/ca/da/cada96e2c697b217ea2dad4faac41bdbeeeb415a3e431205ae6901ff007489ac) - June 1, 2012: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/61/b7/61b7c5b2d493d12b9cf451d82f8c804195482cbda958c0e27d2ddf1a68bb0378) --- 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.