# STC SA4268WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Thrush Aircraft Inc., United States
- Description: Installation of Wright R-1820-71, -60, GR1820G-202A; 702C9GC1, 2, 3, 4; 704C9GC1, 2, 3, or 4 engines and Hamilton Standard 43D50 or 33D50 constant speed propeller or Wright R1820-97 engine and H.S. 23E50 propeller, 506 gallon fiberglass hopper, wing mounted oil cooler, and revised cargo compartment in accordance with Serv-Aero Engineering, Inc. FAA sealed Master Drawing List MDL 9700 "A", dated November 24, 1980, or later FAA approved revision. FAA Approved Serv-Aero Airplane Flight Manual No. 112680, dated November 26, 1980 is required with this modification. See continuation sheets.  (S2R, S/N 2526R AND UP, S2R-R3S, S/N R3S-001 AND UP)
- Applied: October 28, 1980
- Status date: July 30, 2003
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A4SW](https://openairdocs.org/tcds/A4SW)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EC9176165087910A86256DAB004FA686.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4268WE

## ADs that name it (0)

None.

## Approved models (2)

- Ayres Corporation S-2R ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))
- Ayres Corporation S2R-R3S ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))

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