# STC SA1734SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: ABI LLC, United States
- Description: Installation of new design tail wheel.
- Applied: September 24, 1984
- Status date: April 15, 2026
- Product: Aircraft, Small Airplane
- Data sheets: [TCDS A4SW](https://openairdocs.org/tcds/A4SW)
- Certificate PDF: https://openairdocs.org/files/sha256/a4/dc/a4dc55c66ed725d3417c6e71c8d6ef0c09a86917733022b43239f642ac8bf987
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID172729639320260514135256.0001
- DRS record last changed: May 14, 2026
- Page: https://openairdocs.org/stc/SA1734SO

## ADs that name it (0)

None.

## Approved models (11)

- Thrush Aircraft LLC S2R ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Thrush Aircraft LLC S2R-H80 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Thrush Aircraft LLC S2R-R1340 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Thrush Aircraft LLC S2R-R1820 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Thrush Aircraft LLC S2R-R3S ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Thrush Aircraft LLC S2R-T11 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Thrush Aircraft LLC S2R-T15 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Thrush Aircraft LLC S2R-T34 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Thrush Aircraft LLC S2R-T65 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Thrush Aircraft LLC S2RHG-T34 ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Thrush Aircraft LLC 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.

SA1734SO

ABI LLC 81 E. Commercial Drive Palmer, AK 99645 Part 3/8 the Civil Air Regulations A4SW Thrush Aircraft, Inc.

*See page 3 of Continuation Sheet

(See Continuation Sheet 3 of 3) 09/24/1984 02/27/1985 06/19/2014 04/15/2026 01/15/1985 10/01/2012 for Jason S. Deutschman Acting Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3 Installation of new design tail wheel in accordance with Custom Air, Inc. Drawing List Report Number KR-390, Revision "C", dated May 09, 2012, or later FAA approved revision. Allows incorporation of a new tail wheel assembly for specified S2R model agricultural aircraft to increase the gross weight capability from 6000 lbs. to 10,500 lbs.

FAA 8110-2 ( 10/24) Page 2 of __

SA1734SO 04/15/2026 3

SA1734SO 04/15/2026 Model (Continued):

S2RHG-T34; S2R-T65; S2R-H80; S2RHG-T65 (S/N T65-002DC thru T65-012DC and S/N T65HG-013DC and subsequent) S2R-T11; S2R-R3S; S2R-T15; S2R; S2R-R1820; S2R-T34;

S2R-R1340

Airplanes may not exceed their approved gross weights per FAA TCDS A4SW. An impact assessment has been submitted that states that there are no changes to any ICA or maintenance and inspection instructions or procedures. The installer must determine whether this design change is compatible with previously approved modifications. 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.

-END- 3 3

## Every issue (2)

- April 15, 2026: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a4/dc/a4dc55c66ed725d3417c6e71c8d6ef0c09a86917733022b43239f642ac8bf987)
- October 1, 2012: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/8f/9a/8f9a8225ad3d247c164976fda1a8a6dfa9c1f5b4a9aa2f2811c4d8b6fe2df690)

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